Ethernet Ports

This section describes Ethernet ports supported by Arista switches. Topics covered in this section include:

Ethernet Ports Introduction

Arista switches support a variety of Ethernet network interfaces. This chapter describes the configuration and monitoring options available in Arista switching platforms.

Ethernet Standards

Ethernet, standardized in IEEE 802.3, is a group of technologies used for communication over local area networks. Ethernet communication divides data streams into frames containing addresses (source and destination), payload, and Cyclical Redundancy Check (CRC) information.

IEEE 802.3 also describes two types of optical fiber: Single-Mode Fiber (SMF) and Multi-Mode Fiber (MMF). MMF range limits from 50 to 500 meters range.

100 Gigabit Ethernet

The 100 Gigabit Ethernet (100GbE) standard defines an Ethernet implementation with a nominal data rate of 100 billion bits per second over 10x10G, 4x25G, or 1x100G. 100 Gigabit Ethernet implements full duplex point to point links connected by network switches. Arista switches support 100GBASE-10SR through MXP ports.

40 Gigabit Ethernet

The 40 Gigabit Ethernet (40GbE) standard defines an Ethernet implementation with a nominal data rate of 40 billion bits per second over multiple 10 gigabit lanes. 40 Gigabit Ethernet implements full duplex point to point links connected by network switches. 40 gigabit Ethernet standards are named 40GBASE-xyz, as interpreted by 40GBASE-xyz Interpretation.

Table 1. 40GBASE-xyz Interpretation
x y z
Non-fiber media type, or fiber wavelength PHY encoding Number of WWDM wavelengths or XAUI Lanes
C = Copper F = Serial SMF K = Backplane L = Long (1310 nm) S = Short (850 nm) R = LAN PHY (64B/66B) No value = 1 (serial) 4 = 4 WWDM wavelengths or XAUI Lanes

10 Gigabit Ethernet

The 10 Gigabit Ethernet (10GbE) standard defines an Ethernet implementation with a nominal data rate of 10 billion bits per second. 10 Gigabit Ethernet implements full duplex point to point links connected by network switches. Half duplex operation, hubs and CSMA/CD do not exist in 10GbE. The standard encompasses several PHY standards; a networking device may support different PHY types through pluggable PHY modules. 10GbE standards are named 10GBASE-xyz, as interpreted by 10GBASE-xyz Interpretation.

Table 2. 10GBASE-xyz Interpretation
x y z
media type or wavelength, if media type is fiber PHY encoding type Number of WWDM wavelengths or XAUI Lanes
C = Copper (twin axial) T = Twisted Pair S = Short (850 nm) L = Long (1310 nm) E = Extended (1550 nm) Z = Ultra extended (1550 nm) R = LAN PHY (64B/66B) X = LAN PHY (8B/10B) W = WAN PHY(*) (64B/66B) If omitted, value = 1 (serial) 4 = 4 WWDM wavelengths or XAUI Lanes

Gigabit Ethernet

The Gigabit Ethernet (GbE), defined by IEEE 802.3-2008, describes an Ethernet version with a nominal data rate of one billion bits per second. GbE cables and equipment are similar to those used in previous standards. While full-duplex links in switches is the typical implementation, the specification permits half-duplex links connected through hubs.

Gigabit Ethernet physical layer standards that Arista switches support include 1000BASE-X (optical fiber), 1000BASE-T (twisted pair cable), and 1000BASE-CX (balanced copper cable).
  • 1000BASE-SX is a fiber optic standard that utilizes multi-mode fiber supporting 770 to 860 nm, near infrared (NIR) light wavelength to transmit data over distances ranging from 220 to 550 meters. 1000BASE-SX is typically used for intra-building links in large office buildings, co-location facilities and carrier neutral Internet exchanges.
  • 1000BASE-LX is a fiber standard that utilizes a long wavelength laser (1,2701,355 nm), with a RMS spectral width of 4 nm to transmit data up to 5 km. 1000BASE-LX can run on all common types of multi-mode fiber with a maximum segment length of 550 m.
  • 1000BASE-T is a standard for gigabit Ethernet over copper wiring. Each 1000BASE-T network segment can be a maximum length of 100 meters.

10/100/1000 BASE-T

Arista switches provide 10/100/1000 BASE-T Mbps Ethernet out of band management ports. Auto-negotiation is enabled on these interfaces. Speed (10/100/1000), duplex (half/full), and flow control settings are available using the appropriate speed and flowcontrol commands.

Power over Ethernet (PoE)

Selected Arista switches provide power over Ethernet (PoE) to power connected devices. Arista’s PoE implementation is compliant with IEEE standards 802.3af and 802.3at, and includes partial support for 802.3bt.

When a standards-compliant powered device (PD) is connected to a PoE-enabled Ethernet port, it is recognized by a specific resistor signature, and its power class is determined by hardware negotiation; more granular power adjustments can then be managed by Link Layer Discovery Protocol (LLDP).

Link Fault Signaling

Link Fault Signaling (LFS) is a mechanism by which remote link faults are transmitted to the peer over the link that is experiencing problems by configuring specific actions. LFS operates between the remote Reconciliation Sublayer (remote RS) and the local Reconciliation Sub-layer (local RS). Faults that are detected between the remote RS and the local RS are treated by the local RS as Local Faults.

LFS enables monitoring FCS and Symbol errors on an interface and if they exceed a configured threshold, one of the following three actions are enabled.
  • Disable the error on the interface
  • Generate system log messages
  • Generate a link fault

Ethernet Physical Layer

The Ethernet Physical Layer (PHY) includes hardware components connecting a switchs MAC layer to the transceiver, cable, and ultimately a peer link partner.

Data exist in digital form at the MAC layer. On the line side of the PHY, data exist as analog signals: light blips on optical fiber or voltage pulses on copper cable. Signals may be distorted while in transit and recovery may require signal processing. Ethernet physical layer components include a PHY and a transceiver.

PHYs

The PHY provides translation services between the MAC layer and transceiver. It also helps to establish links between the local MAC layer and peer devices by detecting and signaling fault conditions. The PHY line-side interface receives Ethernet frames from the link partner as analog waveforms. The PHY uses signal processing to recover the encoded bits, then sends them to the MAC layer.

PHY line-side interface components and their functions include:
  • Physical Medium Attachment (PMA): Framing, octet synchronization, scrambling / descrambling.
  • Physical Medium Dependent (PMD): Consists of the transceiver.
  • Physical Coding Sublayer (PCS): Performs auto-negotiation and coding (8B/10B or 64B/66B).

The MAC sublayer of the PHY provides a logical connection between the MAC layer and the peer device by initializing, controlling, and managing the connection with the peer.

Ethernet frames transmitted by the switch are received by the PHY system-side interface as a sequence of digital bits. The PHY encodes them into a media-specific waveform for transmission through the line-side interface and transceiver to the link peer. This encoding may include signal processing, such as signal pre-distortion and forward error correction.

PHY system-side interface components and their functions include:
  • 10 Gigabit Attachment Unit Interface (XAUI): Connects an Ethernet MAC to a 10G PHY.
  • Serial Gigabit Media Independent Attachment (SGMII): Connects an Ethernet MAC to a 1G PHY.

Transceivers

A transceiver connects the PHY to an external cable (optical fiber or twisted-pair copper) and through a physical connector (LC jack for fiber or RJ-45 jack for copper).
  • Optical transceivers convert the PHY signal into light pulses that are sent through optical fiber.
  • Copper transceivers connect the PHY to twisted-pair copper cabling.

Arista Small Form-Factor Pluggable (SFP+) and Quad Small Form Factor Pluggable (QSFP+) modules and cables provide high-density, low-power Ethernet connectivity over fiber and copper media. Arista offers transceivers that span data rates, media types, and transmission distances.

Arista 10 Gigabit Ethernet SFP+ Modules

  • 10GBASE-SR (Short Reach)
    • Link length maximum 300 meters over multi-mode fiber.
  • Optical interoperability with 10GBASE-SRL.
  • 10GBASE-SRL (Short Reach Lite)
    • Link length maximum 100 meters over multi-mode fiber.
    • Optical interoperability with 10GBASE-SR.
  • 10GBASE-LRL (Long Reach Lite)
    • Link length maximum 1 km over single-mode fiber.
    • Optical interoperability with 10GBASE-LR (1 km maximum).
  • 10GBASE-LR (Long Reach)
    • Link length maximum 10 km over single-mode fiber.
    • Optical interoperability with 10GBASE-LRL (1 km maximum).
  • 10GBASE-LRM (Long Reach Multimode)
    • Link length maximum 220 meters over multi-mode fiber (50 um and 62.5 um).
  • 10GBASE-ER (Extended Reach)
    • Link length maximum 40 km over single-mode fiber.
  • 10GBASE-ZR (Ultra-Extended Reach)
    • Link length maximum 80 km over single-mode fiber.
  • 10GBASE-DWDM (Dense Wavelength Division Multiplexing)
    • Link length maximum 80 km over single-mode fiber (40 color options).
    • Tunable SFP+ Optics Module, Full C-Band 50 GHz ITU Grid, up to 80km over duplex SMF.

Arista 10 Gigabit Ethernet CR Cable Modules

  • 10GBASE-CR SFP+ to SFP+ Cables
    • Link lengths of 0.5, 1, 1.5, 2, 2.5, 3, 5, and 7 meters over twinax copper cable.
    • Includes SFP+ connectors on both ends.
  • 4 x 10GbE QSFP+ to 4 x SFP+ twinax copper cables.
    • Link lengths of 0.5, 1, 2, 3, and 5 meters over twinax copper cable

Arista 25 Gigabit Ethernet Modules

  • 25GBASE-CR SFP28 Cable
    • Capable of 10G/25G with link length of 1 to 5 meters.
  • AOC-S-S-25G SFP28 to SFP28 25GbE Active Optical Cable.
    • Link length of 3 to 30 meters.
  • SFP-25G-SR SFP28 Optics Module
    • Link length up to 70m over OM3 MMF or 100m over OM4 MMF.
  • SFP-25G-LR SFP28 Optics Module
    • Link length up to 10 kilometers over duplex SMF

Arista 40 Gigabit Ethernet QSFP+ Cables and Optics

  • 40GBASE-SR4 QSFP+ Transceiver.
    • Link length maximum 100 meters over parallel OM3 or 150 meters over OM4 MMF.
    • Optical interoperability with 40GBASE-XSR4 (100/150 meter maximum).
  • 40GBASE-XSR4 QSFP+ Transceiver.
    • Link length maximum 300 meters over parallel OM3 or 450 meters over OM4 MMF.
    • Optical interoperability with 40GBASE-SR4 (100/150 meter maximum).
  • 40GBASE-LR4 QSFP+.
    • Link length maximum 10 km over duplex single-mode fiber.
  • 40GBASE-CR4 QSFP+ to QSFP+ twinax copper cables.
    • Link lengths of 1, 2, 3, 5, and 7 meters over twinax copper cable.
  • 40G-SRBD Bidirectional QSFP+ Optic.
    • Link length maximum up to 100 meters over parallel OM3 or 150 meters over OM4 MMF.
  • 40G Univ QSFP+ Optic.
    • Link length maximum up to 150 meters over duplex OM3/OM4 and 500 meters over duplex SMF.
  • 40GBASE-LRL QSFP+ Optic.
    • Link length maximum up to 1 kilometer over duplex SMF.
  • 40GBASE-PLRL4 QSFP+ Optic.
    • Link length maximum up to 1 kilometer over parallel SMF (4x10G LR up to 1 km).
  • 40GBASE-PLR4 QSFP+ Optic
    • Link length maximum up to 1 kilometer over parallel SMF (4x10G LR up to 1 km).
  • 40GBASE-ER QSFP+ Optic.
    • Link length maximum up to 40 kilometers duplex SMF.

Arista Gigabit Ethernet SFP Options

  • 1000BASE-SX (Short Haul).
    • Multi-mode fiber.
    • Link length maximum 550 meter.
  • 1000BASE-LX (Long Haul).
    • Single-mode fiber.
    • Link length maximum 10 km (single mode).
  • 1000BASE-T (RJ-45 Copper).
    • Category 5 cabling.
    • Full duplex 1000Mbps connectivity.

Arista 100 Gigabit Ethernet QSFP Modules

  • 100GBASE-SR4 QSFP transceiver.
    • Link length up to 70 meters over parallel OM3 or 100 meters over OM4 multi-mode fiber.
  • 100GBASE-SWDM4 QSFP transceiver.
    • Link length up to 70 meters over OM3 or 100 meters over OM4 duplex multi-mode fiber.
  • 100GBASE-SRBD BIDI QSFP transceiver.
    • Link length up to 70 meters over OM3 or 100 meters over OM4 duplex multi-mode fiber.
  • 100GBASE-PSM4 40G/100G dual speed QSFP Optics Module.
    • Link length up to 500 meters over parallel single-mode fiber.
  • 100GBASE-CWDM4 40G/100G dual speed QSFP Optics Module.
    • Link length up to 2 km over duplex single-mode fiber.
  • 100GBASE-LRL4 QSFP Optics Module.
    • Link length up to 2 km over duplex single-mode fiber.
  • 100GBASE-LR4 QSFP Optics Module.
    • Link length up to 10 km over duplex single-mode fiber.
  • 100GBASE-ERL4 QSFP Optics Module.
    • Link length up to 40 km over duplex single-mode fiber.
  • 100G DWDM QSFP transceiver.
    • Link length up to 80 km over single-mode fiber.
  • 100GBASE-CR4 QSFP to QSFP Twinax Copper Cable.
    • Link length of 1 to 5 meters.
  • 100GBASE-CR4 QSFP to 4 x 25GbE SFP Twinax Copper Cable.
    • Link length of 1 to 5 meters.

Internal Ports

Several Arista switches include internal ports that connect directly to an external cable through an RJ-45 jack. Internal ports available on Arista switches include:
  • 100/1000BASE-T (7048T-A)
  • 100/1000/10GBASE-T (7050-T)

AOC Cables

  • AOC-Q-Q-100G QSFP 100GbE Active Optical Cable.
    • Link length of 3 to 30 meters
  • AOC-Q-Q-40G QSFP+ to QSFP+ 40GbE Active Optical Cable.
    • Link length of 3 to 100 meters.
  • AOC-S-S-25G SFP28 to SFP28 25GbE Active Optical Cable.
    • Link length of 3 to 30 meters.

400GBASE-ZR Transceivers

400GBASE-ZR transceiver is the industry’s first multi-vendor DWDM standard, a Digital Coherent Optical module with tunable laser, using DWDM multiplexing and 16QAM modulation and capable of delivering 400G per port over distances up to 120 km.
Key software features supported:
  • Compliant with CMIS4.0/CMIS4.1 (CMIS5.0) and Coherent CMIS
  • Frequency tuning (100GHz and 75GHz grids)
  • DOM monitoring, including VDM (Versatile Diagnostics Monitoring) pages, defined in CMIS4.0
  • Coherent alarms and faults, including pages, defined by Coherent CMIS
  • Configurable Tx output power
  • A separate command for shutting down Tx output path for unidirectional mode
  • 1-sec update of pre-FEC BER, OSNR, ESNR
  • Support of 4x100G mode for the 400GBASE-ZR transceivers (EOS release 4.25.2F)
  • Support of 400GBASE-ZR with Open Forward Error Correction (O-FEC) (EOS release 4.25.2F)
  • Override a transceiver slot’s maximum power limit (EOS release 4.25.2F)

Platform Compatibility

The 400GBASE-ZR transceiver is a power class 8 module with power consumption up to 20W, the highest power consumption among 400G transceivers.

In theory, every 400GBASE OSFP or QSFP-DD switch is qualified to host 400GBASE-ZR transceivers. However, the actual number of 400GBASE-ZR modules that can be plugged in the switch simultaneously may vary, depending on platform (modular vs fixed) and ASIC type. It is always recommended to discuss installation of 400GBASE-ZR modules with Arista support.

Using 400GBASE-ZR in Combination with OSFP-LS

Arista EOS allows using OSFP-LS (pluggable line system in the OSFP form factor), instead of traditional DCI line systems.

Configuring 400GBASE-ZR Transceivers
Laser Frequency Configuration
All coherent modules, including 400GBASE-ZR, require their laser frequency to be explicitly configured. To configure laser frequency in 400GBASE-ZR, use the transceiver frequency command under the defined interface, providing frequency in Gigahertz, in the range 191.3-196.1 THz. If laser frequency is not configured or is configured outside the valid range, all interfaces associated with the port are put into error disabled state.
switch#conf
switch(config)#
switch(config)#interface Ethernet12/1
switch(config-if-Et12/1)#transceiver frequency 193100
switch(config-if-Et12/1)#
Configured and Operational frequency settings can be verified using the show interface transceiver hardware command.
Note:
  • It can take up to 90 sec for the 400GBASE-ZR module to fully complete frequency tuning.
  • The frequency plan for 400GBASE-ZR modules support channel spacings of 100GHz or 75GHz. It is recommended to use operating frequency channel definitions in chapter 15 of [4].
Transmit Output Power Configuration
CMIS4.0 defines support of configurable transmit output power as an optional feature. Check the output of show interface transceiver eeprom command for page 04h, registers 196-201 to see if it is supported.
Programmable output power advertisement (04h:196-201):
    Lane programmable output power supported (04h:196): true
    Min programmable output power (04h:198-199): -14 dB
    Max programmable output power (04h:200-201): -10 dB
Transmit Output Power can be configured using transceiver transmitter signal power command.
switch#conf
switch(config)#interface Ethernet14/1
switch(config-if-Et14/1)#transceiver transmitter signal-power ?
switch(config-if-Et14/1)#transceiver transmitter signal-power -10
Configured Tx Power is verified using the show interface transceiver hardware command. Actual operational Tx Power can be verified using show interface transceiver command.
Note:
  • 400GBASE-ZR does not have a recommended level of transmit laser power. In most cases, it is OK to stay with default power.
  • Some vendors may not populate the range of supported output power correctly. The range -10 to -14 dBm should be supported. Contact Arista Support if you are planning to configure output power outside of this range.
Transmit Output Disable and Unidirectional Mode
In the coherent optics, shutdown command impacts both transmit and receive path and can’t be used to set up unidirectional mode. To shut down Tx output path, use the transceiver transmitter disabled command:
switch#conf
switch(config)#interface Ethernet14/1
switch(config-if-Et14/1)#transceiver transmitter DISABLED

To re-enable transmit output, use the no or default version of the above configuration command.

Configuring 4x100G mode for 400GBASE-ZR transceivers
4x100G mode connects 4 host ethernet interfaces, over electrical interfaces 100GAUI-2 to the single optical lane, acting as 4x1 muxponder. To enable the mode on a 400GBASE-ZR transceiver, configure the speed on each of the 4 interfaces.
switch(config-if-Et4/1)#speed 100g-2
switch(config-if-Et4/3,4/5,4/7)#speed 100g-2

switch#show interfaces ethernet 4/1-5/8 status
Port   	Name   Status   	  Vlan 	Duplex Speed  Type     	Flags Encapsulation
Et4/1       	connected 	  1    	full   100G   400GBASE-ZR               	 
Et4/3       	connected 	  1    	full   100G   400GBASE-ZR               	 
Et4/5       	connected 	  1    	full   100G   400GBASE-ZR               	 
Et4/7       	connected 	  1    	full   100G   400GBASE-ZR               	 
Et5/1       	connected          1    	full   100G   400GBASE-ZR               	 
Et5/3       	connected          1    	full   100G   400GBASE-ZR               	 
Et5/5       	connected          1    	full   100G   400GBASE-ZR               	 
Et5/7       	connected   	1    	full   100G   400GBASE-ZR
Each of the ethernet interfaces can be independently shut down without affecting the transmission over the other interfaces.
switch(config-if-Et4/1,4/3,4/5)#shutdown
switch#show interfaces ethernet 4/1-5/8 status
Port   	Name   Status   	  Vlan 	Duplex Speed  Type     	Flags Encapsulation
Et4/1       	disabled 	  1    	full   100G   400GBASE-ZR               	 
Et4/3       	disabled 	  1    	full   100G   400GBASE-ZR               	 
Et4/5       	disabled 	  1    	full   100G   400GBASE-ZR               	 
Et4/7       	connected	  1    	full   100G   400GBASE-ZR               	 
Et5/1       	notconnect        1    	full   100G   400GBASE-ZR               	 
Et5/3       	notconnect        1    	full   100G   400GBASE-ZR               	 
Et5/5       	notconnect        1    	full   100G   400GBASE-ZR               	 
Et5/7       	connected	  1    	full   100G   400GBASE-ZR

switch#show interfaces ethernet 4/1 transceiver
If device is externally calibrated, only calibrated values are printed.
N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
                            	Bias  	Optical   Optical           	 
      	Temp   	Voltage    Current    Tx Power  Rx Power          	 
Port  	(Celsius)  (Volts)    (mA)  	(dBm)     (dBm)  	Last Update  
----- 	---------  --------   --------  --------  --------    -------------------
Et4/1	      59.00  	3.25  	279.70     -9.46     -8.29   	0:00:01 ago
Shutting down all 4 interfaces will however disable the laser:
switch(config-if-Et4/7)#shutdown
switch#show interfaces ethernet 4/1-5/8 status
Port   	Name   Status   	  Vlan 	Duplex Speed  Type     	Flags Encapsulation
Et4/1       	disabled 	  1    	full   100G   400GBASE-ZR               	 
Et4/3       	disabled 	  1    	full   100G   400GBASE-ZR               	 
Et4/5       	disabled 	  1    	full   100G   400GBASE-ZR               	 
Et4/7       	disabled	   1    	full   100G   400GBASE-ZR               	 
Et5/1       	notconnect        1    	full   100G   400GBASE-ZR               	 
Et5/3       	notconnect        1    	full   100G   400GBASE-ZR               	 
Et5/5       	notconnect        1    	full   100G   400GBASE-ZR               	 
Et5/7       	notconnect	 1    	full   100G   400GBASE-ZR

switch#show interfaces ethernet 4/1 transceiver
If device is externally calibrated, only calibrated values are printed.
N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
                            	Bias  	Optical   Optical           	 
      	Temp   	Voltage    Current    Tx Power  Rx Power          	 
Port  	(Celsius)  (Volts)    (mA)  	(dBm)     (dBm)  	Last Update  
----- 	---------  --------   --------  --------  --------    -------------------
Et4/1	      44.00  	3.33  	0.00      -30.00     -30.00   	0:00:01 ago
Configuring Open Forward Error Correction on 400GBASE-ZR

Open FEC (O-FEC) is a Forward Error Correction encoder and decoder, specified in the Open ZR+ MSA [2], with an overhead of 15.3% and a net coding gain of 11.6dB for 16QAM modulation. Compared to the Concatenated FEC (C-FEC), which is a default FEC specified for 400GBASE-ZR coherent transceivers by CMIS4.0, O-FEC provides higher coding gain (11.6dB for O-FEC vs 10.8 dB for C-FEC /16QAM), and it can correct pre-FEC BER of up to 2e-2.

The error-correction encoding <FEC> command configures the transceiver’s optical transmission to use O-FEC:
switch(config-if-Et4/1)#error-correction encoding open
Transceiver slot’s Maximum Power Limit
The transceiver power ignore command allows EOS to bypass the power check for the transceivers to be operational.
Switch(config-if-Et4/1)#transceiver power ignore
! You can risk damaging hardware by using transceiver modules with high power consumption. We recommend that you do this only under direction from Arista Networks.
Show Commands
  • show interface transceiver eeprom

    The show interface transceiver eeprom command displays the parsed capabilities.

    Example

    For 400GBASE-ZR, parsing of frequency tuning, power tuning ( page 04h ) and VDM configuration pages (20h-23h) is added.
    switch#show interface Ethernet15/1 transceiver eeprom
    Ethernet15 EEPROM:
    ...
      Frequency tuning support (04h:128-129):
        Grid spacing capabilities (04h:128):
          100 GHz grid supported (04h:128): true
          12.5 GHz grid supported (04h:128): false
          25 GHz grid supported (04h:128): false
          3.125 GHz grid supported (04h:128): false
          33 GHz grid supported (04h:128): false
          50 GHz grid supported (04h:128): false
          6.25 GHz grid supported (04h:128): false
          75 GHz grid supported (04h:128): true
        Tunable wavelength (04h:128): true
        Fine tuning support (04h:129): false
      Supported channel boundaries (04h:130-161):
        100 GHz grid (04h:150-153):
          Lowest channel (04h:150-151): -18
          Lowest frequency (04h:150-151): 191300000 MHz
          Highest channel (04h:152-153): 30
          Highest frequency (04h:152-153): 196100000 MHz
        75 GHz grid (04h:158-161):
          Lowest channel (04h:158-159): -72
          Lowest frequency (04h:158-159): 191300000 MHz
          Highest channel (04h:160-161): 120
          Highest frequency (04h:160-161): 196100000 MHz
      Programmable output power advertisement (04h:196-201):
        Lane programmable output power supported (04h:196): false
      VDM configuration (20h:128-255;21h:128-255):
        VDM group 1 (20h:128-255):
          Parameter 1 (20h:128-129):
            Lane (20h:128): 0
            Threshold ID (20h:128): 0
            Parameter type (20h:129): Laser temperature
          Parameter 3 (20h:132-133):
            Lane (20h:132): 0
            Threshold ID (20h:132): 2
            Parameter type (20h:133): eSNR host input
          Parameter 4 (20h:134-135):
            Lane (20h:134): 1
            Threshold ID (20h:134): 2
            Parameter type (20h:135): eSNR host input
          Parameter 5 (20h:136-137):
            Lane (20h:136): 2
            Threshold ID (20h:136): 2
            Parameter type (20h:137): eSNR host input
    ...
           Parameter 84 (21h:166-167):
            Lane (21h:166): 0
            Threshold ID (21h:166): 14
            Parameter type (21h:167): MER
      Number of VDM groups supported (2Fh:128): 2
  • show interface transceiver dom

    The show interface transceiver dom command displays the most important current performance data on the media (line) side.

    Example
    switch#show interface Ethernet11/1 transceiver dom
    Ch: Channel, N/A: not applicable, TX: transmit, RX: receive
    mA: milliamperes, dBm: decibels (milliwatts), C: Celsius, V: Volts
    
    Port 11
    Last update: 0:00:05 ago
                                                 Value
                                            ----------------
       Case temperature                         66.59 C
       Voltage                                   3.26 V
       TX power                                -10.23 dBm
       RX total power                          -11.61 dBm
       RX channel power                        -11.94 dBm
       Pre-FEC BER                           1.82e-03 
       Post-FEC errored frames ratio         0.00e+00 
       Chromatic dispersion (short link)         0.00 ps/nm
       Chromatic dispersion (long link)          0.00 ps/nm
       Differential group delay                  9.31 ps
       SOPMD                                     0.00 ps^2
       Polarization dependent loss               0.40 dB
       Received OSNR estimate                   35.10 dB
       Received ESNR estimate                   17.50 dB
       Carrier frequency offset                  0.00 MHz
       Error vector magnitude                  100.00 %
       SOP rate of change                        0.00 krad/s
       Laser temperature                        59.54 C
       Laser frequency                         193100.00 GHz
    • BER: Bit Error Rate
    • FEC: Forward Error Correction
    • OSNR: Optical Signal to Noise Ratio
    • ESNR: Electrical Signal to Noise Ratio
    • SOP: State of Polarization
    • SOPMD: State of Polarization Mode Dispersion
  • show interfaces hardware

    The show interfaces hardware command displays the speed capabilities of a module. A 400GBASE-ZR supports 4x100G mode if the 100G-2/full speed is supported.

    Example

    switch#show interfaces ethernet 4/1 hardware 
    *  = Requires speed group setting change
    Ethernet4/1
      Model: DCS-7280PR3K-24
      Type: 400GBASE-ZR
      Speed/duplex: 100G-2/full,400G-8/full(default)
      Flowcontrol: rx-(off,on),tx-(off)
      Modulation: 16QAM
      Error correction: C-FEC(16QAM(default)), O-FEC(16QAM)

    The show interface status command displays the ethernet interfaces:

    switch#show interfaces ethernet 4/1,4/3,4/5,4/7 status
    Port      Name  Status   	Vlan 	Duplex Speed  Type     	Flags Encapsulation
    Et4/1       	connected	1    	full   100G   400GBASE-ZR
    Et4/3       	connected	1    	full   100G   400GBASE-ZR
    Et4/5       	connected	1    	full   100G   400GBASE-ZR
    Et4/7       	connected	1    	full   100G   400GBASE-ZR
  • show transceiver status interface

    The show transceiver status interface command displays the most important alarms, faults and interface status and the existence of 4 host interfaces.

    Example

    For 400GBASE-ZR modules, media and host side coherent alarms, host-side pre-FEC BER, defined in the Coherent CMIS and post-FEC BER have been added to the command’s output:
    switch#show transceiver status interface Ethernet 4/1,4/3,4/5,4/7
                                    Current State        Changes       Last Change
                                    -------------        -------       -----------
    Port 4
      Transceiver               	400GBASE-ZR           	3   	2:32:34 ago
      Transceiver SN            	204653947                  	 
      Presence                  	present                       	 
      Adapters                  	none                          	 
      Bad EEPROM checksums                                 	0   	never
      Resets                                               	0   	2:32:41 ago
      Interrupts                                           	0   	never
      Data path firmware fault  	ok                     	0   	never
      Module firmware fault     	ok                     	0   	never
      Temperature high alarm    	ok                     	0   	never
      Temperature high warn     	ok                     	0   	never
      Temperature low alarm     	ok                     	0   	never
      Temperature low warn      	ok                     	0   	never
      Voltage high alarm        	ok                     	0   	never
      Voltage high warn         	ok                     	0   	never
      Voltage low alarm         	ok                     	2   	2:32:19 ago
      Voltage low warn          	ok                     	2   	2:32:19 ago
      Module state              	ready                  	6   	0:02:21 ago
      Data path 1 state         	activated             	12   	0:01:33 ago
      Data path 2 state         	activated             	12   	0:01:33 ago
      Data path 3 state         	activated             	12   	0:01:33 ago
      Data path 4 state         	activated             	12   	0:01:33 ago
      Data path 5 state         	activated             	12   	0:01:33 ago
      Data path 6 state         	activated             	12   	0:01:33 ago
      Data path 7 state         	activated             	12   	0:01:33 ago
      Data path 8 state         	activated             	12   	0:01:33 ago
      RX LOS                    	ok                     	4   	0:01:33 ago
      TX fault                  	ok                     	0   	never
      RX CDR LOL                	ok                     	4   	0:01:31 ago
      TX power high alarm       	ok                     	0   	never
      TX power high warn        	ok                     	4   	0:02:12 ago
      TX power low alarm        	ok                     	4   	0:02:21 ago
      TX power low warn         	ok                     	6   	0:02:12 ago
      TX bias high alarm        	ok                     	0   	never
      TX bias high warn         	ok                     	0   	never
      TX bias low alarm         	ok                     	0   	never
      TX bias low warn          	ok                     	0   	never
      RX power high alarm       	ok                     	0   	never
      RX power high warn        	ok                     	0   	never
      RX power low alarm        	ok                     	0   	never
      RX power low warn         	ok                     	0   	never
      TX loss of alignment      	ok                     	0   	never
      TX out of alignment       	ok                     	0   	never
      TX clock monitor unit LOL 	ok                     	0   	never
      TX reference clock LOL    	ok                     	0   	never
      TX deskew LOL             	ok                     	0   	never
      TX FIFO error             	ok                     	0   	never
      RX demodulator LOL        	ok                     	4   	0:01:30 ago
      RX CD compensation LOL    	ok                     	4   	0:01:30 ago
      RX loss of alignment      	ok                     	0   	never
      RX out of alignment       	ok                     	0   	never
      RX deskew LOL             	ok                     	0   	never
      RX FIFO error             	ok                     	0   	never
      RX FEC excessive degrade  	ok                     	0   	never
      RX FEC detected degrade   	ok                     	0   	never
      Freq tuning in progress   	idle                   	8   	0:01:32 ago
      Freq tuning busy          	ok                     	0   	never
      Freq tuning invalid channel   ok                     	0   	never
      Freq tuning completed     	no                     	8   	0:01:30 ago
    Ethernet4/1
      Operational speed         	100Gbps                       	 
      Pre-FEC bit error rate    	0.00e+00                      	 
      Post-FEC errored frames ratio 0.00e+00                      	 
      TX LOS
    	Host lane 1             	ok                     	2   	0:02:21 ago
    	Host lane 2             	ok                     	2   	0:02:21 ago
      TX CDR LOL
    	Host lane 1             	ok                     	2   	0:02:21 ago
    	Host lane 2             	ok                     	0   	never
      TX adaptive input EQ fault
    	Host lane 1             	ok                     	2   	0:02:21 ago
    	Host lane 2             	ok                     	2   	0:02:21 ago
    Ethernet4/3
      Operational speed         	100Gbps                       	 
      Pre-FEC bit error rate    	0.00e+00                      	 
      Post-FEC errored frames ratio 0.00e+00                      	 
      TX LOS
    	Host lane 3             	ok                     	2   	0:02:21 ago
    	Host lane 4             	ok                     	2   	0:02:21 ago
      TX CDR LOL
    	Host lane 3             	ok                     	2   	0:02:21 ago
    	Host lane 4             	ok                     	2   	0:02:21 ago
      TX adaptive input EQ fault
    	Host lane 3             	ok                     	2   	0:02:21 ago
    	Host lane 4             	ok                     	2   	0:02:21 ago
    Ethernet4/5
      Operational speed         	100Gbps                       	 
      Pre-FEC bit error rate    	0.00e+00                      	 
      Post-FEC errored frames ratio 0.00e+00                      	 
      TX LOS
    	Host lane 5             	ok                     	2   	0:02:21 ago
    	Host lane 6             	ok                     	2   	0:02:21 ago
      TX CDR LOL
    	Host lane 5             	ok                     	0   	never
    	Host lane 6             	ok                     	2   	0:02:21 ago
      TX adaptive input EQ fault
    	Host lane 5             	ok                     	0   	never
    	Host lane 6             	ok                     	2   	0:02:21 ago
    Ethernet4/7
      Operational speed         	100Gbps                       	 
      Pre-FEC bit error rate    	0.00e+00                      	 
      Post-FEC errored frames ratio 0.00e+00                      	 
      TX LOS
    	Host lane 7             	ok                     	2   	0:02:21 ago
    	Host lane 8             	ok                     	2   	0:02:21 ago
      TX CDR LOL
    	Host lane 7             	ok                     	2   	0:02:21 ago
    	Host lane 8             	ok                     	2   	0:02:21 ago
      TX adaptive input EQ fault
    	Host lane 7             	ok                     	2   	0:02:21 ago
    	Host lane 8             	ok                     	0   	never
  • Wavelength/Frequency and Output Power Status
    The show interface transceiver hardware command displays the configured and programmed wavelength and output power. It takes a short time for the configured wavelength or output power to be programmed into the transceiver. The configured wavelength/output power and programmed wavelength/output power should not differ for extended periods of time.
    switch#show interface Ethernet23/1 trans hardware
    Name: Et23/1
    Media type: 400GBASE-ZR
    Maximum module power (W): 20.0
    Maximum slot power (W): 20.0
    Configured frequency (GHz): 193100.0
    Computed wavelength (nm): 1552.52
    Operational frequency (GHz): 193,100.0
    Operational wavelength (nm): 1552.52
    Configured TX power (dBm): -10.0
    Operational TX power (dBm): -10.0
    Note: Configured transmit output power and operational transmit output power are only displayed if configurable output power is supported by the module.
Troubleshooting
  1. Check transceiver type – make sure it is 400GBASE-ZR
  2. Check peer transceiver – make sure it is also 400GBASE-ZR.
  3. Check that channel/frequency is configured and interfaces are not in errdisabled state
  4. Check that the selected frequency is matching on both sides of the optical link
  5. Check that transmit output is not disabled
  6. If Tx power is not configured, check that it is in the range of -6 dB to -12 dB.
  7. If Tx power is configured, check that matches its configured values on both sides of the optical link.
  8. Check Rx power. The best performance of an optical link is achieved when the received power is -10dB.
  9. Collect the output of CLI commands listed in the “Show commands” section before making a request for support from the development team.
  10. Check that pre-FEC BER ( ‘show transceiver dom’ command ) is in the correctable range ( less than 1e-2 ).
  11. ‘show transceiver status interface’ - check that module state is ‘Ready’, datapath state is ‘Activated’. Check for possible alarms and faults

Link Issues

If a link has issues, the following commands and files are useful for debugging and Arista TAC.

  • show interfaces <interfaceName> phy detail
  • show interfaces <interfaceName> transceiver detail
  • show idprom transceiver <interfaceName> ext
  • files in /var/log/agents/*
  • files in /var/log/qt/*
  • /var/log/messages*
Limitations
400GBASE-ZR transceivers are relatively new. The modules could be Arista branded or 3rd party, from multiple vendors. For 3rd party optics, some optional properties (Tx output power, support of 75GHz grid) or DOM properties in the VDM pages, may not be implemented.

MXP Ports

MXP ports provide embedded optics that operate in one of three modes: 10GbE (12 ports), 40GbE (3 ports), and 100GbE (1 port). Each mode requires a specified cable is implemented through configuration commands. MXP ports utilize multi-mode fiber to provide support over 150 meters.
  • 100GbE mode requires an MTP-24 to MTP-24 cable, which uses 20 of 24 fibers to carry 100Gbe across 10 send and 10 receive channels. When connecting two 100GbE MXP ports, the TX lanes must be crossed with the RX lanes.
  • 40GbE mode requires an MTP cable that provides a split into three MTP-12 ends. The cable splits the MXP port into three MTP-12 ends, each compatible with standards based 40GBASE-SR4 ports over OM3 or OM4 fiber up to 100m or 150m.
  • 10GbE mode requires an MTP cable that provides a split into 12x10G with LC connectors to adapt the MXP port into 12x10GbE. The cable splits the MXP port into twelve LC ends for using SR or SRL optics over multimode OM3/OM4 cables.

Interfaces

Arista switches provide two physical interface types that receive, process, and transmit Ethernet frames: Ethernet interfaces and Management interfaces.

Each Ethernet interface is assigned a 48-bit MAC address and communicates with other interfaces by exchanging data packets. Each packet contains the MAC address of its source and destination interface. Ethernet interfaces establish link level connections by exchanging packets. Interfaces do not typically accept packets with a destination address of a different interface.

Ethernet data packets are frames. A frame begins with preamble and start fields, followed by an Ethernet header that includes source and destination MAC addresses. The middle section contains payload data, including headers for other protocols carried in the frame. The frame ends with a 32-bit Cyclic Redundancy Check (CRC) field that interfaces use to detect data corrupted during transmission.

Ethernet Interfaces

Ethernet speed and duplex configuration options depend on the media type of the interface:
  • 40G, OSFP, QSFP+, QSFP-DD, and QSFP200: Default operation is as four 10G ports. Speed command options support configuration as a single 40G port.
  • 1000BASE-T / 2.5GBASE-T / 5GBASE-T / 10GBASE-T (copper): Default configuration enables the Clause 28 auto-negotiation for the port to negotiate the speed based on peer capabilities. Depending on individual SKU capabilities, these ports support 10M/100M/1G/2.5G/5G and 10G rates and half / full-duplex mode of operation. The Speed auto SPEED command limits the port advertisements only to a specific speed. The SPEED commands disables the Clause 28 auto-negotiation and uses the specified speed as the forced speed setting.sa commands.
  • 10GBASE-T (SFP+): Port operates as a single 10G port. speed commands do not affect configuration.
  • 100G CFP2: Default operation is 100G. It cannot be split, and its speed cannot be changed.
  • 100G MXP: Operates as three 40G ports on the 7050 platform. On the 7050 platforms, available speed/duplex settings are three 40G ports or twelve 10G ports. Adjustments are made with speed commands.
  • 100G QSFP100: Available speeds are transceiver-dependent. The QSFP100 transceiver supports a single 100G port, four 25G ports, or two 50G ports; the QSFP+ transceiver supports one 40G port or four 10G ports; the CWDM transceiver supports all five configurations. Adjustments are made using speed commands.
  • The SFP1000BASE-T transceivers advertise one speed at a time only. Hence, the desired speed and negotiation must be configured explicitly using the following commands:
    • speed auto: auto-negotiated 1Gbps (this is because no speed is specified and we are defaulting to advertise 1G).
    • speed auto 1Gfull / speed auto: auto-negotiated 1Gbps (note that per BASE-T standard, 1G must be negotiated).
    • speed auto 100full: auto-negotiated 100Mbps.
    • speed 100full: non-negotiated / forced 100Mbps.
  • The SFP10GBASE-Ts transceivers advertise one speed at a time only, similar to SFP1000BASE-Ts, unlike native BASE-T ports. The no and default speed commands configure the PHY to advertise only 10G.

For information relating to transceivers, see Transceivers.

Subinterfaces

Subinterfaces divide a single ethernet or port channel interface into multiple logical L3 interfaces based on the 802.1q tag (VLAN ID) of incoming traffic. Subinterfaces are commonly used in the L2/L3 boundary device, but they can also be used to isolate traffic with 802.1q tags between L3 peers by assigning each subinterface to a different VRF.

While subinterfaces can be configured on a port channel interface (the virtual interface associated with a port channel), the following restrictions apply:
  • An L3 interface with subinterfaces configured on it should not be made a member of a port channel.
  • An interface that is a member of a port channel should not have subinterfaces configured on it.
  • A subinterface cannot be made a member of a port channel.

Subinterfaces on multiple ports can be assigned the same VLAN ID, but there is no bridging between subinterfaces (or between subinterfaces and SVIs), and each subinterface is considered to be in a separate bridge domain.

The following features are supported on subinterfaces:
  • Unicast and multicast routing
  • BGP, OSPF, ISIS, PIM
  • ACL
  • VRF
  • VRRP
  • SNMP
  • Subinterface counters (on some platforms)
  • VXLAN (on some platforms)
  • MPLS (on some platforms)
  • GRE (on some platforms)
  • PBR (on some platforms)
  • QoS (on some platforms)
  • Inheriting QoS settings (trust mode and default DSCP) from the parent interface
  • Inheriting MTU setting from parent interface
The following are not supported on subinterfaces:
  • Per-subinterface MTU setting
  • Per-subinterface SFLOW settings
  • Per-subinterface mirroring settings

Shared Shaper across Multiple Subinterfaces

Sub-interfaces can be grouped into logical units called scheduling groups, which are shaped as a single unit. Each scheduling group may be assigned a scheduling policy which defines a shape rate in kbps and optionally a guaranteed bandwidth, also in kbps.

The guaranteed bandwidth is used if the sum of the shape rates of all scheduling groups and sub-interfaces that are not part of groups for a parent interface exceeds the available bandwidth. Each sub-interface within that scheduling group may have its own independent shape rate which are applied in a hierarchical manner.

Adding a sub-interface to a scheduling group results in allocation of dedicated Virtual Output Queues (VOQ) for the sub-interface.

Configuration
Scheduling groups and scheduling policies are configured in the qos scheduling CLI mode.
  1. First, configure one or more sub-interfaces.
  2. Then, create a scheduling policy with the desired shape rate and optional guaranteed bandwidth:
    switch(config)#qos scheduling
    switch(config-qos-scheduling)#scheduling policy P1
    switch(config-qos-scheduling-policy-P1)#shape rate 75000000
    switch(config-qos-scheduling-policy-P1)#bandwidth guaranteed 10000000
  3. The shape rate and guaranteed bandwidth may also be defined as percents of the next highest level of the hierarchy (in this case line rate):
    switch(config-qos-scheduling-policy-P1)#shape rate 75 percent
    switch(config-qos-scheduling-policy-P1)#bandwidth guaranteed percent 10
  4. Create the scheduling group on the parent interface:
    switch(config)#qos scheduling
    switch(config-qos-scheduling)#interface et1
    switch(config-qos-scheduling-intf-Ethernet1)#scheduling group G1
  5. Assign a policy to the scheduling group:
    switch(config-qos-scheduling-intf-Ethernet1-group-G1)#policy P1
  6. Assign members to the scheduling group (members may be put all on one line or on separate lines):
    switch(config-qos-scheduling-intf-Ethernet1-group-G1)#members et1.1 et1.2
Show Commands
  • QoS configuration on one or more scheduling groups. Both group name and parent interface name are optional, in which case all groups are displayed as shown in the example below:

    Example

    switch#show qos scheduling group G1 Ethernet1
    Interface: Et1
    Scheduling Group Name: G1
    Bandwidth: 10.1 / 10.0 (Gbps)
    Shape Rate: 75.2 / 75.0 (Gbps)
    
    Member         Bandwidth        Shape Rate
                    (units)           (units)
    ------       -------------  ------------------
    Et1.1           - /  - (-)  50.1 / 50.0 (Gbps)
    Et1.2           - /  - (-)  30.1 / 30.0 (Gbps)
  • QOS configuration on a parent interface will show scheduling groups configured on the parent interface.

    Example

    switch#show qos interface Ethernet1
    Ethernet1:
    
       Trust Mode: DSCP
       Default COS: 0
       Default DSCP: 0
    
       Port shaping rate: disabled
    
    Scheduling Group        Bandwidth           Shape Rate
                             (units)             (units)
    ----------------    ------------------  ------------------
    G1                  10.1 / 10.0 (Gbps)  75.1 / 75.0 (Gbps)
  • The entire scheduling hierarchy for a subinterface can be displayed. This displays the shape rate for each transmit queue and then the shape rate and guaranteed bandwidth at every other level of the hierarchy.

    Example

    switch#show qos scheduling hierarchy Ethernet1.1
    Interface           Hierarchy Level            Bandwidth             Shape Rate
                                                    (units)               (units)
    ---------       -------------------------  ------------------     ----------------
    Et1/1.100       tx queue (0)                  - /    -               100 / 100 (Mbps)
                    tx queue (2)                  - /    -               200 / 200 (Mbps)
                    subinterface (Et1/1.1)      100 /  100 (Mbps)        500 / 500 (Mbps)
                    group (G1)                   10 /   10 (Gbps)         75 /  75 (Gbps)
                    parent (Et1/1) (100 Gbps)     - /    -                 - /   -  ( - )

Agile Ports

Agile Ports are a feature of the 7150S Series that allows the user to configure adjacent blocks of 4 x SFP+ interfaces as a single 40G link. The set of interfaces that can be combined to form a higher speed port is restricted by the hardware configuration. Only interfaces that pass through a common PHY component can be combined. One interface within a combinable set is designated as the primary port.

When the primary interface is configured as a higher speed port, all configuration statements are performed on that interface. All other interfaces in the set are subsumed and not individually configurable when the primary interface is configured as the higher speed port. This feature allows the 7150S-24 to behave as a 4x40G switch (using 16 SFP+) and the remaining SFP+ provide 8 x 10Gports. On the 7150S-52 this allows up to 13x 40G (all 52 ports grouped as 40G) and on the 7150S-64 Agile Ports allows the switch to be deployed with up to 16 native 40G interfaces - 4 are QSFP+ and the remaining 12 as 4xSFP+ groups.

Management Interfaces

The management interface is a Layer 3 host port that is typically connected to a PC for performing out of band switch management tasks. Each switch has one or two management interfaces. Only one port needs to manage the switch; the second port, when available, provides redundancy.

Management interfaces are 10/100/1000 BASE-T interfaces. By default, auto-negotiation is enabled on management interfaces. All combinations of speed 10/100/1000 and full or half duplex is enforceable on these interfaces through speed commands.

Management ports are enabled by default. The switch cannot route packets between management ports and network (Ethernet interface) ports because they are in separate routing domains. When the PC is multiple hops from the management port, packet exchanges through Layer 3 devices between the management port and PC may require the enabling of routing protocols.

The Ethernet management ports are accessed remotely over a common network or locally through a directly connected PC. An IP address and static route to the default gateway must be configured to access the switch through a remote connection.

Tunable SFP

Tuning of DWDM 10G SFP+ transceivers (10GBASE-DWDM) includes:
  • Tuning transceiver wavelength/frequency by channel number.
  • Showing wavelengths/frequencies for specified channels supported by the transceiver.
  • Showing current wavelength/frequency settings of the transceiver interface.

For information relating to tuning the transceiver wavelength/frequency by channel number, refer to the command transceiver channel. To show the current wavelength/frequency settings for specified channels, refer to the command show interfaces transceiver channels. To show the current wavelength/frequency settings of an interface, refer to the command show interfaces transceiver hardware.

MRU Enforcement

Maximum Receive Unit (MRU) enforcement provides the ability to drop frames that exceed a configured threshold on the ingress interface.

Configuring MRU Enforcement

MRU is configurable per-interface, and can be configured on Ethernet and Port-Channel interfaces. Frames with size greater than the configured MRU value drop on the ingress, and do not forward to the destined egress interface. MRU enforcement happens at the Ethernet interface and applies to both L2 and L3 traffic. Note that FCS (frame check sequence) is included in the frame size.

Ethernet Interface

switch(config)#interface ethernet 1
switch(config)#l2 mru 9000

Frames with size greater than 9000 bytes ingressing into Ethernet1 are dropped.

Port-Channel Interface

Members of a Port-Channel interface inherit the Port-Channel interface’s MRU value. Members’ MRU configured in the Ethernet interface configuration mode has no effects.
switch(config)#interface ethernet 1 - 4
switch(config-if-Et1-4)#channel-group 10 mode active
switch(config)#interface port-Channel 10
switch(config-if-Po10)#

Frames with size greater than 9000 bytes ingressing into Ethernet1, 2, 3, and 4 are dropped.

Sub-interfaces

MRU configured on an Ethernet interface or Port-Channel are applied to all of its sub-interfaces.

Default Behaviours

By default, MRU is set to the maximum value.
  • For DCS-7280R3 and DCS-7500R3 series
    • The maximum MRU is 10240 bytes
  • For other supported platforms
    • In TapAgg mode, the maximum MRU is 10240 bytes.
    • In non TapAgg mode, the maximum MRU is 10200 bytes.

MRU Enforcement Limitations

  • The number of features for which the hardware counters can be enabled simultaneously is limited by the availability of counter hardware resources in the system. When the configured hardware features exceed the available counter resources, not all counters for all features are available.
    • At lower scales of the feature key (for example, the number of interfaces in the case of subinterface/SVI counters), you can typically concurrently support up to six (6) ingress features and three (3) egress features. As scales grow beyond table sizes, single features use multiple tables.
  • Route counters do not support the counting of host routes or ALPM routes.
  • Packets sent from the CPU are not included in egress counters.

MRU Enforcement Show commands

The MRU on an interface is found in the show interface output.

switch(config)#show interface ethernet 1
Ethernet1 is up, line protocol is up (connected)
  Hardware is Ethernet, address is 444c.a8b7.1ed8 (bia 444c.a8b7.1ed8)
  Member of Port-Channel10
  Ethernet MTU 10178 bytes, Ethernet MRU 1500 bytes, BW 10000000 kbit
  Full-duplex, 10Gb/s, auto negotiation: off, uni-link: disabled.

Counter

MRU dropped packets are counted per-chip.

The Ethernet interfaces corresponding chip are found in the show platform fap mapping output.
switch(config)#show platform fap mapping interface Ethernet 1
Jericho0 (FapId: 0  BaseSystemCoreId: 0)
Port             SysPhyPort   Voq   Core  FapPort  OtmPort BaseQPair QPairs Xlge NifPort
----------------------------------------------------------------------------------------
Ethernet1        100          2608  0      2       0        0         8     8     33
Reassembly Errors use per-chip counters from the show hardware counter drop output.
switch(config)#show hardware counter drop
Type  Chip       CounterName       : Count    : First Occurrence    : Last Occurrence
-----------------------------------------------------------------------------------------
A     Jericho0   ReassemblyErrors  : 12132989 : 2020-09-22 17:05:45 : 2020-09-22 17:22:40

Ethernet Configuration Procedures

Physical Interface Configuration Modes

The switch provides two configuration modes for modifying Ethernet parameters:
  • Interface-Ethernet mode configures parameters for specified Ethernet interfaces.
  • Interface-Management mode configures parameters for specified management Ethernet interfaces.

Physical interfaces cannot be created or removed.

Multiple interfaces can be simultaneously configured. Commands are available for configuring Ethernet specific, layer 2, Layer 3, and application layer parameters. Commands that modify protocol specific settings in Ethernet configuration mode are listed in the protocol chapters.
Examples
  • This command places the switch in Ethernet-interface mode for Ethernet interfaces 5-7 and 10.
    switch(config)#interface ethernet 5-7,10
    switch(config-if-Et5-7,10)#
  • This command places the switch in management-interface mode for management interface 1.
    switch(config)#interface management 1
    switch(config-if-Ma1)#

Assigning a MAC Address to an Interface

Ethernet and Management interfaces are assigned a MAC address when manufactured. This address is the burn-in address. The mac-address command assigns a MAC address to the configuration mode interface in place of the burn-in address. The no mac-address command reverts the interfaces current MAC address to its burn-in address.

Examples
  • This command assigns the MAC address of 001c.2804.17e1 to Ethernet interface 7.
    switch(config-if-Et7)#mac-address 001c.2804.17e1
  • This command displays the MAC address of Ethernet interface 7. The active MAC address is 001c.2804.17e1. The burn-in address is 001c.7312.02e2.
    switch(config-if-Et7)#show interface ethernet 7
    Ethernet7 is up, line protocol is up (connected)
      Hardware is Ethernet, address is 001c.2804.17e1 (bia 001c.7312.02e2)
      Description: b.e45
    switch(config-if-Et7)#

Port Groups (QSFP+ and SFP+ Interface Selection)

Several of Arista’s fixed switches limit the number of 10G data lanes in operation through the use of port groups. A port group is a set of interfaces that can be configured as four SFP+ interfaces or a single QSFP+ interface. When configured in SFP+ mode, the port group enables four standalone 10GbE interfaces using SFP+ optics. When configured in QSFP+ mode, the port group enables a single QSFP+ interface (in addition to the dedicated QSFP+ ports), which can operate as a single 40GbE port, or as four 10GbE ports with the appropriate breakout cabling.

Hardware port groups are used on the following systems:
  • DCS-7050Q-16
  • DCS-7050QX-32S

Use the hardware port-group command to select the interface mode for the specified port group.

Note: The hardware port-group command restarts the forwarding agent, which disrupts traffic on all switch ports.

Example

These commands configure the DCS-7050-Q16 switch to enable four SFP+ interfaces and one extra QSFP+ interface by enabling the SFP+ interfaces in port-group 1 and the QSFP+ interface in port-group 2.
switch(config)#hardware port-group 1 select Et17-20
switch(config)#hardware port-group 2 select Et16/1-4

The show hardware port-group command displays the status of ports in the port groups.

Example

This command displays the status of the flexible ports within the two port groups on a DCS-7050Q-16 switch.
switch#show hardware port-group

Portgroup: 1    Active Ports: Et17-20
Port            State
------------------------------------------
Ethernet17      Active
Ethernet18      Active
Ethernet19      Active
Ethernet20      Active
Ethernet15/1    ErrDisabled
Ethernet15/2    ErrDisabled
Ethernet15/3    ErrDisabled
Ethernet15/4    ErrDisabled

Portgroup: 2    Active Ports: Et16/1-4
Port            State
------------------------------------------
Ethernet16/1Active
Ethernet16/2Active
Ethernet16/3Active
Ethernet16/4Active
Ethernet21ErrDisabled
Ethernet22ErrDisabled
Ethernet23ErrDisabled
Ethernet24ErrDisabled 

DCS-7050Q-16

The DCS-7050Q-16 has 14 dedicated QSFP+ ports, plus two port groups. The port groups support either two additional QSFP+ ports or eight SFP+ ports as shown in DCS-7050Q-16 Port Groups.

Table 3. DCS-7050Q-16 Port Groups
Port Group 1

Active Interface(s)

Port Group 2

Active Interface(s)

In SFP+ Mode In QSFP+ Mode (Default) In SFP+ Mode

In QSFP+ Mode (Default)
Et17-20

(four SFP+ ports)

Et15/1-4

(one QSFP+ port)

Et21-24

(four SFP+ ports)

Et16/1-4

(one QSFP+ port)

DCS-7050QX-32S

The DCS-7050QX-32S has 31 dedicated QSFP+ ports, plus one port group. The port group supports either one additional QSFP+ port or four SFP+ ports as shown in DCS-7050QX-32S Port Groups.

Table 4. DCS-7050QX-32S Port Groups
Port Group 1

Active Interface(s)

In SFP+ Mode

In QSFP+ Mode (Default)

Et1-4

(four SFP+ ports)

Et5/1-4

(one QSFP+ port)

Referencing Modular Ports

Arista modular switches provide port access through installed line cards. The maximum number of line cards on a modular switch varies with the switch series and model.

Several CLI commands modify modular parameters for all ports on a specified line card or controlled by a specified chip. This manual uses these conventions to reference modular components:
  • card_x refers to a line card.
  • module_y refers to a QSFP+ module.
  • port_z refers to a line card or module port.
Commands that display Ethernet port status use the following conventions:
  • SFP ports: card_x/port_z to label the line card-port location of modular ports.
  • QSFP ports: card_x/module_y/port_z to label the line card-port location of modular ports.

QSFP+ Ethernet Port Configuration describe QSFP+ module usage.

Example

This command displays the status of interfaces 1 to 9 on line card 4:
switch#show interface ethernet 4/1-9 status
Port      Name              Status       Vlan        Duplex  Speed Type
Et4/1                       connected    1             full    10G Not Present
Et4/2                       connected    1             full    10G Not Present
Et4/3                       connected    1             full    10G Not Present
Et4/4                       connected    1             full    10G Not Present
Et4/5                       connected    1             full    10G Not Present
Et4/6                       connected    1             full    10G Not Present
Et4/7                       connected    1             full    10G Not Present
Et4/8                       connected    1             full    10G Not Present
Et4/9                       connected    1             full    10G Not Present
switch>

Referencing Multi-lane Ports

EOS supports two types of Ethernet ports:
  • single-lane (also called fixed-lane)
  • multi-lane (also called flexible-lane)
Single-lane (or fixed-lane) ports are always modeled as a single interface within EOS. While the speed of the interface may be configurable, the physical port can never be broken out into multiple lower-speed interfaces. Single-lane ports use the following naming scheme:
  • Ethernet <port #> (for fixed switches)
  • Ethernet <module #>/<port #> (for modular switches)
Multi-lane (or flexible lane) ports are made up of multiple parallel lanes, each served by its own laser. Multi-lane ports can be configured to combine the lanes and operate as a single native high-speed interface (a 40GbE or 100GbE interface), or to operate each lower-speed interface independently (four 10GbE or 25GbE interfaces). Multi-lane ports use the following naming scheme:
  • Ethernet port #/lane # (for fixed switches)
Ethernet module #/port #/lane # (for modular switches)

The operational state displayed for each lane of a multi-lane port is determined by the configuration applied to the primary lane(s), as shown in Lane States. When broken out into multiple lower-speed interfaces, all lanes will be active in parallel, and each will display its operational state as connected or not connected. In high-speed mode, only the primary lane(s) will be displayed as active, with the remaining lanes showing as errdisabled. The exception is the CFP2 module: when it is configured as a single 100GbE port, the primary lane is displayed as active in the CLI while the other lanes are hidden.

Table 5. Lane States
Parent Port

Configured Mode

Primary Lane(s) Secondary Lanes
single high-speed

interface

active

(connected/not connected)

inactive

(errdisabled)

multi-interface

breakout

active

(connected/not connected)

active

(connected/not connected)

A multi-lane port is configured as a single high-speed interface or multiple breakout interfaces by using the speed command on the primary lane(s) of the port. For specific configuration instructions and details regarding the primary lane(s) of a specific interface, refer to the configuration section for the appropriate interface type:
Note:

Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.

Hitless Speed Change with Dynamic Logical Ports

Higher speed ports on several switches can be broken out into multiple interfaces that can be configured at lower speeds. Each of these interfaces is called a Logical Port (LP). Switches such as the DCS-7260CX3-64, allocate and deallocate the logical ports dynamically to optimize hardware resources. Care must be taken for hitless speed changes, therefore, as a change of speed on a Dynamic Logical Port (DLP) may impact the status of one or more related DLP(s).

Checking Status of DLPs

The following example is applicable to a switch that supports a breakout of a 100G physical port to 4x 25G DLPs.

The command displays the status of Et 45/1-4, when a 100G physical port is broken out to 4x 25G DLPs.

switch(config)#show interfaces ethernet 45/1-4 status
Port   	Name   Status   	Vlan 	Duplex Speed  Type     	Flags 
Et45/1        	notconnect   1    	full   25G	Not Present
Et45/2        	notconnect   1    	full   25G	Not Present
Et45/3        	notconnect   1    	full   25G	Not Present
Et45/4        	notconnect   1    	full   25G	Not Present

The following example displays the inactive interfaces (DLPs) when the 100G physical port is configured for the 100G speed.

switch(config)#show interfaces ethernet 45/1-4 status
Port   	Name   Status   	Vlan 	Duplex Speed  Type     	Flags
Et45/1        	notconnect	1    	full   100G   Not Present
Et45/2        	inactive  	1    	unconf unconf Not Present
Et45/3        	inactive  	1    	unconf unconf Not Present
Et45/4        	inactive  	1    	unconf unconf Not Present

By default, inactive interfaces will not be displayed by this command. To enable showing them, use the following command.

switch(config)#[no] service interface inactive expose

Only systems without DLP allocation have enough logical ports for every interface to be active simultaneously.

QSFP+ Ethernet Port Configuration

Each QSFP+ module contains four data lanes which can be used individually or combined to form a single, higher-speed interface. This allows a QSFP+ Ethernet port to be configured as a single 40GbE interface or as four 10GbE interfaces.

When the four lanes are combined to form a 40GbE interface, display commands will show lane /1 as connected or not connected, and will show lanes /2 through /4 as errdisabled.

The following sections describe the configuration of QSFP+ ports.

Configuring a QSFP+ Module as a Single 40GbE Interface

To configure the port as a single 40GbE interface, combine the modules four data lanes by using the speed command (speed forced 40g full) on the ports /1 lane (the primary lane).

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for lane /1 of the QSFP+ Ethernet interface.
    switch(config)#interface ethernet 5/1/1
  2. Enter the speed 40gfull command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 40gfull
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status
    Port Name Status Vlan Duplex Speed Type Flags
    Et1 connected 2 full 1G 10GBASE-T
        <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1 connected 1 full 40G 40GBASE-SR4
    Et5/1/2 errdisabled 1 unconf unconf 40GBASE-SR4
    Et5/1/3 errdisabled 1 unconf unconf 40GBASE-SR4
    Et5/1/4 errdisabled 1 unconf unconf 40GBASE-SR4
         <-------OUTPUT OMITTED FROM EXAMPLE-------->

Configuring a QSFP+ Module as Four 10GbE Interfaces

To configure the port as four 10GbE interfaces, use the speed command (speed 10000full) on the ports /1 lane (the primary lane).

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for lane /1 of the QSFP+ Ethernet interface.
    switch(config)#interface ethernet 5/1/1
  2. Enter the speed 10000full command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 10000full
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status  
    PortNameStatusVlanDuplexSpeedTypeFlags 
    Et1connected2full1G10GBASE-T 
    Et5/1/1connected1full10G40GBASE-SR4 
    Et5/1/2connected1full10G40GBASE-SR4 
    Et5/1/3connected1full10G40GBASE-SR4 
    Et5/1/4connected1full10G40GBASE-SR4 

QSFP100 Ethernet Port Configuration

Each QSFP100 module contains four data lanes which can be used individually or combined to form a single, higher-speed interface. This allows a QSFP100 Ethernet port to be configured as a single 100GbE interface, a single 40GbE interface, or four 10GbE interfaces. The default mode is a single 100GbE interface.

The 7060X, 7260X and 7320X platforms also allow a QSFP100 port to be configured as two 50GbE interfaces or four 25GbE interfaces.

When the lanes are combined to form a higher-speed interface, display commands show the primary lane(s) as connected or not connected, and shows the other lanes as errdisabled.

The following sections describe the configuration of QSFP+ ports.

Configuring a QSFP100 Module as a Single 100GbE Interface

By default, the QSFP100 module operates as a single 100GbE interface; using the default speed or no speed command on the primary lane restores the default behavior.

To explicitly configure the port as a single 100GbE interface, combine the modules four data lanes by using the speed command (speed 100gfull) on the ports /1 lane (the primary lane).

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for lane /1 of the QSFP100 Ethernet interface.
    switch(config)#interface ethernet 5/1/1
  2. Enter the speed 100gfull command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 100gfull
  3. Use the show interfaces status command to confirm the change in configuration.
    
    switch(config-if-Et5/1/1)#show interfaces status
    Port    Name     Status    Vlan    Duplex     Speed    Type    Flags 
    Et1              connected    2     full      1G     10GBASE-T 
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1          connected    1     full      100G   100GBASE-SR4 
    Et5/1/2          errdisabled  1    unconf    unconf  100GBASE-SR4 
    Et5/1/3          errdisabled  1    unconf    unconf  100GBASE-SR4 
    Et5/1/4          errdisabled  1    unconf     unconf 100GBASE-SR4
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

Configuring a QSFP100 Module as Two 50GbE Interfaces

To configure the port as a two 50GbE interfaces, configure the modules four data lanes by using the speed command (speed 50gfull) on the ports /1 and /3 lanes. This configuration is available on 7060X, 7260X and 7320X platforms.

Note:

Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, s7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.

  1. Enter interface Ethernet configuration mode for lane /1 of the QSFP100 Ethernet interface.
    switch(config)#interface ethernet 5/1/1
  2. Enter the speed 50gfullcommand. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 50gfull
  3. Repeat the above steps for lane /3.
    switch(config-if-Et5/1/1)#interface ethernet 5/1/3
    switch(config-if-Et5/1/3)#speed 50gfull
  4. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status 
    Port       Name     Status      Vlan      Duplex    Speed    Type      Flags
    Et1                connected     2          full     1G     10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1            connected     1          full     50G    100GBASE-SR4
    Et5/1/2            errdisabled   1          unconf  unconf  100GBASE-SR4
    Et5/1/3            connected     1          full     50G    100GBASE-SR4
    Et5/1/4            errdisabled   1          unconf  unconf  100GBASE-SR4
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

Configuring a QSFP100 Module as a Single 40GbE Interface

To configure the port as a single 40GbE interface, combine the modules four data lanes by using the speed command (speed 40gfull) on the ports /1 lane (the primary lane).

Note:

Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.

  1. Enter interface Ethernet configuration mode for lane /1 of the QSFP100 Ethernet interface.
    switch(config)#interface ethernet 5/1/1 
  2. Enter the speed 40gfull command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 40gfull 
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status
    Port     Name     Status      Vlan     Duplex    Speed     Type     Flags
    Et1               connected     2       full       1G     10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1           connected     1       full       40G    100GBASE-SR4
    Et5/1/2           errdisabled   1       unconf    unconf  100GBASE-SR4
    Et5/1/3           errdisabled   1       unconf    unconf  100GBASE-SR4
    Et5/1/4           errdisabled   1       unconf    unconf  100GBASE-SR4
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

Configuring a QSFP100 Module as Four 10GbE Interfaces

To configure the port as four 10GbE interfaces, use the speed command (speed 10000full) on the ports /1 lane (the primary lane).

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for lane /1 of the QSFP100 Ethernet interface.
    switch(config)#interface ethernet 5/1/1 
  2. Enter the speed 10000full command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 10000full 
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status 
    Port       Name       Status      Vlan     Duplex    Speed      Type         Flags
    Et1                   connected    2        full        1G    10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1               connected    1        full        10G   100GBASE-SR4
    Et5/1/2               connected    1        full        10G   100GBASE-SR4
    Et5/1/3               connected    1        full        10G   100GBASE-SR4
    Et5/1/4               connected    1        full        10G   100GBASE-SR4
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

CFP2 Ethernet Port Configuration

Each CFP2 module contains ten data lanes. The configuration options available on the port depend on the optic inserted:
  • CFP2-100G-LR4 optics operate only in 100GbE mode.
  • CF2-100G-ER4 optics operate only 100GbE mode.
  • CFP2-100G-XSR10 optics can be configured as a single 100GbE interface or as ten 10GbE interfaces.

When the port is configured as ten 10GbE interface, each lane is active and visible in CLI display commands. When the lanes are combined to form a single 100GbE interface, display commands will show the primary lane as connected or not connected; all other lanes will be hidden.

The following sections describe the configuration of CFP2 ports.

Configuring a CFP2 Module a as a Single100GbE Interface

To configure the port as a single 100GbE interface (the default configuration), combine the modules ten data lanes by using the speed command (speed 100gfull) on the ports /1 lane (the primary lane).

This configuration is available for all pluggable optics.

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for lane /1 of the CFP2 Ethernet interface.
    switch(config)#interface ethernet 5/1/1 
  2. Enter the speed 100gfull command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 100gfull
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status 
    Port      Name      Status     Vlan     Duplex    Speed     Type      Flags
    Et1                 connected    2       full       1G     10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1             connected    1       full      100G    100GBASE-SR1
    Et5/2/1             connected    1       full      100G    100GBASE-SR1
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

Configuring a CFP2 Module as Ten 10GbE Interfaces

To configure the port as four 10GbE interfaces, use the speed command (speed 10000full) on the ports /1 lane (the primary lane).

This configuration is available only for CFP2-100G-XSR10 optics.

Note:

Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.

  1. Enter interface Ethernet configuration mode for lane /1 of the CFP2 Ethernet interface.
    switch(config)#interface ethernet 5/1/1
  2. Enter the speed 10000full command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/1/1)#speed 10000full 
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/1/1)#show interfaces status
    Port     Name    Status     Vlan Duplex   Speed   Type       Flags
    Et1             connected    2    full      1G   10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1         connected    1    full      10G  100GBASE-SR1
    Et5/1/2         connected    1    full      10G  100GBASE-SR1
    Et5/1/3         connected    1    full      10G  100GBASE-SR1
    Et5/1/4         connected    1    full      10G  100GBASE-SR1
    Et5/1/5         connected    1    full      10G  100GBASE-SR1
    Et5/1/6         connected    1    full      10G  100GBASE-SR1
    Et5/1/7         connected    1    full      10G  100GBASE-SR1
    Et5/1/8         connected    1    full      10G  100GBASE-SR1
    Et5/1/9         connected    1    full      10G  100GBASE-SR1
    Et5/1/10        connected    1    full      10G  100GBASE-SR1
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

Default QSFP Mode Support

QSFP+ transceiver supports 40G and 4x10G. This feature provides support for changing the default QSFP mode between 40G and 4x10G on all ports with QSFP+ transceivers.

Configuration

On all front panel ports which support this feature, the following global configuration command changes their default QSFP mode from 40G to 4x10G,

transceiver qsfp default-mode 4x10G

The no or default version of the command reverts the default QSFP mode back to 40G.

Note: This configuration command is not honored on ports that do not support this feature (such as QSFP100 ports with external PHY always choose 40G as the default QSFP mode).

Show Commands

There is no explicit show command to display the default QSFP mode. Use the show running-config command to determine whether the default QSFP mode is 4x10G or 40G. Use the show interfaces hardware command to check the default QSFP mode on the given ports.
  • When default QSFP mode is configured as 4x10G, the output of show running-config contains transceiver qsfp default-mode 4x10G. In the output of the show interfaces hardware command, 10G is shown as the default speed.
    switch(config)#transceiver qsfp default-mode 4x10G
    switch(config)#show running-config | grep 4x10G
    transceiver qsfp default-mode 4x10G
    switch(config)#show interfaces ethernet 35/1 hardware
    *  = Requires speed group setting change
    Ethernet35/1
      Model:          DCS-7280CR3-32P4
      Type:           40GBASE-CR4
      Speed/Duplex:   10G/full(default),40G/full,auto
      Flowcontrol:    rx-(off,on,desired),tx-(off)
  • When default QSFP mode configuration is reverted the default, the output of show running-config command does not contain transceiver qsfp default-mode 4x10G. In the output of show interfaces hardware command, 40G is shown as the default speed.
    switch(config)#no transceiver qsfp default-mode
    switch(config)#show running-config | grep 4x10G
    switch(config)#show interfaces ethernet 35/1 hardware
    *  = Requires speed group setting change
    Ethernet35/1
      Model:          DCS-7280CR3-32P4
      Type:           40GBASE-CR4
      Speed/Duplex:   10G/full,40G/full(default),auto
      Flowcontrol:    rx-(off,on,desired),tx-(off)

Limitations

There is support for the no transceiver qsfp default-mode 4x10G command on the DCS-7300X Series, but the default QSFP mode still remains as 4x10G.

MXP Ethernet Port Configuration

Each MXP module contains twelve data lanes which can be used individually or combined to form one or more higher-speed interfaces. This allows an MXP Ethernet port to be configured as a single 100GbE interface, up to twelve 10GbE interfaces, or a mixture of 40GbE and 10GbE ports.

MXP ports do not use pluggable optics: instead, an MTP-24 ribbon is inserted directly into the port. The remote end of the MTP 24 ribbon must then be broken out using a splitter cable or cartridge based on the operational mode and speed of the MXP port.

When four lanes of an MXP interface are combined to form a 40GbE port, CLI commands show the primary lane of that group as connected or not connected and the other three lanes as errdisabled.

The following sections describe the configuration of MXP interfaces.

Configuring an MXP Module as a Single 100GbE Interface

To configure the port as a single 100GbE interface (the default configuration), enter the speed command (speed 100gfull) on the ports /1 lane (the primary lane). This combines lanes 1-10 and disables lanes 11 and 12.

Under this configuration, CLI display commands will show lane /1 as connected or not connected, and show lanes /2-/12 as errdisabled.

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for lane /1 of the MXP Ethernet interface.
    switch(config)#interface ethernet 5/49/1
  2. Enter the speed 100gfull command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/49/1)#speed 100gfull
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/49/1)#show interfaces status 
    Port          Name        Status        Vlan        Duplex     Speed      Type          Flags
    Et1                       connected      2           full        1G      10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/49/1                  connected      1           full       100G     100GBASE-SR1
    Et5/49/2                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/3                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/4                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/5                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/6                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/7                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/8                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/9                  errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/10                 errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/11                 errdisabled    1           unconf     unconf   100GBASE-SR1
    Et5/49/12                 errdisabled    1           unconf     unconf   100GBASE-SR1

Configuring an MXP Module With 40GbE Interfaces

Each set of four lanes on the MXP module is independently configurable as a single 40GbE interface or four 10GbE interfaces. To configure four lanes as a single 40GbE interface, enter the speed command (speed forced 40gfull) on the groups primary lane (/1, /5, or /9). To revert a group of four lanes to functioning as four independent 10GbE interfaces, enter the speed 10000full command on the primary lane of the group.

When four lanes of an MXP interface are combined to form a 40GbE port, CLI commands will show the primary lane of that group as connected or not connected and the other three lanes as errdisabled. In groups of four lanes which are configured as four independent 10GbE interfaces, each lane will be displayed in the CLI as connected or not connected.

Note that a speed forced 100gfull command entered on the /1 lane takes precedence over speed 40gfull commands on the /5 and /9 lanes.

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.

The example below shows the steps for configuring an MXP module as three 40GbE interfaces.

  1. Enter interface Ethernet configuration mode for lane /1 of the MXP Ethernet interface.
    switch(config)#interface ethernet 5/49/1
  2. Enter the speed 40gfull command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/49/1)#speed 40gfull
  3. Repeat the above steps for lanes /5 and /9.
    switch(config-if-Et5/49/1)#interface ethernet 5/49/5 
    switch(config-if-Et5/49/5)#speed 40gfull
    switch(config-if-Et5/49/5)#interface ethernet 5/49/9
    switch(config-if-Et5/49/9)#speed 40gfull
  4. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/49/9)#show interfaces status 
    Port Name Status Vlan Duplex Speed Type Flags
    Et1          connected       2     full      1G      10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/49/1     connected       1     full     40G      100GBASE-SR1
    Et5/49/2     errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/3     errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/4     errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/5     connected       1     full     40G      100GBASE-SR1
    Et5/49/6     errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/7     errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/8     errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/9     connected       1     full     40G      100GBASE-SR1
    Et5/49/10    errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/11    errdisabled     1     unconf   unconf   100GBASE-SR1
    Et5/49/12    errdisabled     1     unconf   unconf   100GBASE-SR1

Configuring an MXP Module as Twelve 10GbE Interfaces

Each lane of an MXP port functions as a 10GbE interface when it is not included in a higher-speed interface configuration (either actively or as an errdisabled port).

To explicitly configure the port as twelve 10GbE interfaces, use the speed command (speed 10000full) on all twelve lanes of the port.

When each lane is configured as an independent 10GbE interface, CLI display commands show each lane as connected or not connected.

Note: Use of the speed command to configure a multi-lane port is hitless on the 7050X, 7060X, 7250X, 7260X, 7280CR3, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, this command restarts the forwarding agent, which will result in traffic disruption. On 7160 series platforms, use of the speed command is hitless, but if the command changes the number of port lanes, packets may be dropped on unrelated ports.
  1. Enter interface Ethernet configuration mode for all twelve lanes of the MXP Ethernet interface.
    switch(config)#interface ethernet 5/49/1-12
  2. Enter the speed 10000full command. Depending on the platform, this command may restart the forwarding agent, disrupting traffic on all ports for 60 seconds or more.
    switch(config-if-Et5/49/1-12)#speed 10000full
  3. Use the show interfaces status command to confirm the change in configuration.
    switch(config-if-Et5/49/1-12)#show interfaces status 
    Port       Name      Status      Vlan      Duplex       Speed      Type       Flags
    Et1                 connected      2        full          1G      10GBASE-T
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et5/1/1             connected      1        full          10G     100GBASE-SR1
    Et5/1/2             connected      1        full          10G     100GBASE-SR1
    Et5/1/3             connected      1        full          10G     100GBASE-SR1
    Et5/1/4             connected      1        full          10G     100GBASE-SR1
    Et5/1/5             connected      1        full          10G     100GBASE-SR1
    Et5/1/6             connected      1        full          10G     100GBASE-SR1
    Et5/1/7             connected      1        full          10G     100GBASE-SR1
    Et5/1/8             connected      1        full          10G     100GBASE-SR1
    Et5/1/9             connected      1        full          10G     100GBASE-SR1
    Et5/1/10            connected      1        full          10G     100GBASE-SR1
    <-------OUTPUT OMITTED FROM EXAMPLE-------->

Port Speed Capabilities

The supported speeds supported on each Arista platform per interface type are described in Supported Speeds (GbE).

Table 6. Supported Speeds (GbE)
Platform SFP+ SFP28 QSFP+ QSFP100 MXP CFP2
7050 100M, 1, 10 N/A

1, 10, 40

N/A

N/A

N/A

7050X 100M, 1, 10 N/A

1, 10, 40

N/A

10, 40

N/A

7050X2 100M, 1, 10 N/A

1, 10, 40

N/A

N/A

N/A

7050X3 100M, 1, 10 1, 10, 25

N/A

10, 25, 40, 50, 100

N/A

N/A

7250X N/A N/A

1, 10, 40

N/A

N/A

N/A

7060X 100M, 1, 10 N/A

N/A

10, 25, 40, 50, 100

N/A

N/A

7060X2 100M, 1, 10 1, 10, 25

N/A

10, 25, 40, 50, 100

N/A

N/A

7260X3 100M, 1, 10 N/A

N/A

10, 25, 40, 50, 100

N/A

N/A

7300X 100M, 1, 10 N/A

1, 10, 40

N/A

N/A

N/A

7300X3 N/A 1, 10, 25

N/A

10, 25, 40, 50, 100

N/A

N/A

7320X N/A N/A

N/A

10, 25, 40, 50, 100

N/A

N/A

7150S 1, 10 N/A

1, 10, 40

N/A

N/A

N/A

7048T 1, 10 N/A

N/A

N/A

N/A

N/A

7500 1, 10 N/A

1, 10, 40

N/A

N/A

N/A

7500E 1, 10 N/A

1, 10, 40

10, 40, 100

10, 40, 100

100

7500R 1, 10 1, 10, 25

1, 10, 40

10, 25, 40, 50, 100

N/A

N/A

7280SE 1, 10 N/A

1, 10, 40

10, 40, 100

10, 40, 100

N/A

7280QR N/A N/A

1, 10, 40

10, 25, 40, 50, 100

N/A

N/A

7280SR (R2) 1, 10 1, 10, 25

N/A

10, 25, 40, 50, 100

N/A

100, 200

7280CR N/A N/A

N/A

10, 25, 40, 50, 100

N/A

N/A

7010T 100M, 1, 10 N/A

N/A

N/A

N/A

N/A

Agile Ports

An agile port is an interface that can function as a 10G port or can subsume a predefined set of 10G interfaces to form an interface with higher speed capabilities.

The set of interfaces that can be combined to form a higher speed port is restricted by the hardware configuration. Only interfaces that pass through a common PHY component can be combined. One interface within a combinable set is designated as the primary port.

  • To view the set of available agile ports and the subsumable interfaces that comprise them, enter show platform fm6000 agileport map.
  • To configure the primary port as a higher speed port, enter speed 40gfull or speed auto 40gfull.
  • To revert the primary port and its subsumed ports to 10G interfaces, enter no speed.

Subinterface Configuration

For a subinterface to be operational on an Ethernet or port channel interface, the parent interface must be configured as a routed port and be administratively up, and a VLAN must be configured on the subinterface. If the parent interface goes down, all subinterfaces automatically go down as well, but will come back up with the same configuration once the parent interface is up.

Note that a port channel should not contain Ethernet interfaces with subinterfaces configured on them, and that subinterfaces cannot be members of a port channel.

Subinterfaces are named by adding a period followed by a unique subinterface number to the name of the parent interface. Note that the subinterface number has no relation to the ID of the VLAN corresponding to the subinterface.

Subinterfaces are available on the following platforms:
  • DCS-7050X
  • DCS-7060X
  • DCS-7250X
  • DCS-7260X
  • DCS-7280E
  • DCS-7300X
  • DCS-7320X
  • DCS-7500E

Creating a Subinterface

To create a subinterface on an Ethernet or port channel interface:

  1. Bring up the parent interface and ensure that it is configured as a routed port.
    switch(config)#interface Ethernet1/1
    switch(config-if-Et1/1)#no switchport 
    switch(config-if-Et1/1)#no shutdown
  2. Configure a VLAN on the subinterface. The encapsulation dot1q vlan command is also used for VLAN translation, but in this context it associates a VLAN with the subinterface.
    switch(config-if-Et1/1)#interface Ethernet1/1.1
    switch(config-if-Et1/1.1)#encapsulation dot1q vlan 100
  3. Configure an IP address on the subinterface (optional) and ensure that it is up.
    switch(config-if-Et1/1)#ip address 10.0.0.1/24
    switch(config-if-Et1/1)#no shutdown 
    switch(config-if-Et1/1)#

Creating a Range of Subinterfaces

A range of subinterfaces can also be configured simultaneously. The following example configures subinterfaces 1 to 100 on Ethernet interface 1/1, and assigns VLANs 501 through 600 to them. Note that the range of interfaces must be the same size as the range of VLAN IDs.

Example
switch(config)#interface eth1/1.1-100
switch(config-if-Et1/1.1-100)#no shutdown
switch(config-if-Et1/1.1-100)#encapsulation dot1q vlan {501,600}
switch(config-if-Et1/1.1-100)#exit
switch(config)#

Parent Interface Configuration

For subinterfaces to function, the parent interface must be administratively up and configured as a routed port.

Some settings are inherited by subinterfaces from the parent interface. These include QoS (trust mode and default DSCP) and MTU.

Additionally, on the DCS-7050X, DCS-7250X, and DCS-7300X platforms, the parent interface may be configured with an IP address. In this case, untagged packets are treated as incoming traffic on the parent interface

Configuring Routing Features on a Subinterface

Once a subinterface is created, the following features can be configured on it:
  • Unicast and multicast routing
  • BGP, OSPF, ISIS, PIM
  • VRF
  • VRRP
  • SNMP
  • Inheritance of QoS (trust mode and default DSCP) and MTU settings from the parent interface
Additionally, these features can be configured on subinterfaces on Arad (DCS-7500E and DCS-7280E) platforms:
  • Subinterface counters on ingress
  • VXLAN
  • MPLS
  • GRE
  • PBR
  • QoS

Displaying Subinterface Information

Subinterface information is displayed using the same show commands as for other interfaces.

Examples
  • This command displays summary information for all IP interfaces on the switch, including subinterfaces.
switch#show ip interfaces brief
 Interface           IP Address     Status    Protocol     MTU
 Ethernet1/1        10.1.1.1/24up     up        1500
Ethernet1/1.1       10.0.0.1/24up     up        1500
 Ethernet1/2         unassigned       up         up       1500
  • This command displays information for subinterface Ethernet 1/1.1.
switch#show interface ethernet 1/1.1
Ethernet1/1.1 is down, line protocol is lowerlayerdown (notconnect)
  Hardware is Subinterface, address is 001c.735d.65dc
  Internet address is 10.0.0.1/24
  Broadcast address is 255.255.255.255
  Address determined by manual configuration
  IP MTU 1500 bytes , BW 10000000 kbit
  Down 59 seconds
switch>
  • This command displays status information for all subinterfaces configured on the switch.
switch#show interfaces status sub-interfaces
Port       Name    Status       Vlan     Duplex       Speed       Type                Flags
Et1.1              connect     101        full       10G      dot1q-encapsulation
Et1.2              connect     102        full       10G      dot1q-encapsulation
Et1.3              connect     103        full       10G      dot1q-encapsulation
Et1.4              connect     103        full       10G      dot1q-encapsulation

Maximum Latency Tail-drop Thresholds

The maximum latency for Tail-drop thresholds can be configured in interface configuration mode or in the QoS profile. QoS profile configuration mode is a group change mode.

Example

These commands configure the maximum latency value for VOQ tail-drop threshold on transmit queue 3 on interface Ethernet1. The latency value can be specified to a maximum of 50 ms. Both milliseconds and microseconds may be used.

switch(config)#interface Ethernet1
switch(config-if-Et1)#tx-queue 3
switch(config-if-Et1-txq-3)#latency maximum <1-50000> microseconds
switch(config-if-Et1-txq-3)#latency maximum <1-50> milliseconds
switch(config)#

Autonegotiated Settings

In autonegotiation, the transmission speed, duplex setting, and flow control parameters used for Ethernet-based communication can be automatically negotiated between connected devices to establish optimized common settings.

Speed and Duplex

The speed command affects the transmission speed and duplex setting for the configuration mode interface. When a speed command is in effect on an interface, autonegotiation of speed and duplex settings is disabled for the interface; to enable autonegotiation, use the speed auto command.

The scope and effect of the speed command depends on the interface type; see Ethernet Interfaces and Ethernet Configuration Procedures for detailed information on the speed settings for different interfaces.

Flow Control

Flow control is a data transmission option that temporarily stops a device from sending data because of a peer data overflow condition. If a device sends data faster than the receiver can accept it, the receiver's buffer can overflow. The receiving device then sends a PAUSE frame, instructing the sending device to halt transmission for a specified period.

Flow control commands configure administrative settings for flow control packets.
  • The flowcontrol receive command configures the port's ability to receive flow control pause frames.
    • off: port does not process pause frames that it receives.
    • on: port processes pause frames that it receives.
    • desired: port autonegotiates; processes pause frames if peer is set to send or desired.
  • The flowcontrol send command configures the port's ability to transmit flow control pause frames.
    • off: port does not send pause frames.
    • on: port sends pause frames.
    • desired: port autonegotiates; sends pause frames if peer is set to receive or desired.

Desired is not an available parameter option. Ethernet data ports cannot be set to desired. Management ports are set to desired by default and with the no flowcontrol receive command.

The port linking process includes flow control negotiation. Ports must have compatible flow control settings to create a link. Compatible Settings for Flow Control Negotiation lists the compatible flow control settings.

Table 7. Compatible Settings for Flow Control Negotiation
local port peer port
receive on send on or send desired
receive off send off or send desired
receive desired send on , send off, or send desired
send on receive on or receive desired
send off receive off or receive desired
send desired receive on , receive off, or receive desired

Example

These commands set the flow control receive and send to on on Ethernet interface 5.
switch(config)#interface ethernet 5
switch(config-if-Et5)#flowcontrol receive on
switch(config-if-Et5)#flowcontrol send on
switch(config-if-Et5)#

Displaying Ethernet Port Properties

Show commands are available to display various Ethernet configuration and operational status on each interface. Ethernet settings that are viewable include:
  • Port Type
  • PHY Status
  • Negotiated Settings
  • Flow Control
  • Capabilities

Port Type

The port type is viewable from the output of show interfaces status, show interfaces hardware, and show interfaces transceiver properties commands.

Examples

  • This show interfaces status command displays the status of Ethernet interfaces 1-5.
    switch#show interfaces status
    Port      Name              Status       Vlan        Duplex  Speed Type
    Et1                         connected    1             full    10G 10GBASE-SRL
    Et2                         connected    1             full    10G 10GBASE-SRL
    Et3                         connected    1             full    10G 10GBASE-SRL
    Et4                         connected    1             full    10G 10GBASE-SRL
    Et5                         notconnect   1             full    10G Not Present
    switch>
  • This show interfaces hardware command displays the speed, duplex, and flow control capabilities of Ethernet interfaces 2 and 18.
    switch#show interfaces ethernet 2,18 hardware
    Ethernet2
      Model:        DCS-7150S-64-CL
      Type:         10GBASE-CR
      Speed/Duplex: 10G/full,40G/full,auto
      Flowcontrol:  rx-(off,on,desired),tx-(off,on,desired)
    Ethernet18
      Model:        DCS-7150S-64-CL
      Type:         10GBASE-SR
      Speed/Duplex: 10G/full
      Flowcontrol:  rx-(off,on),tx-(off,on)
    switch>
  • This command displays the media type, speed, and duplex properties for Ethernet interfaces 1.
    switch#show interfaces ethernet 1 transceiver properties
    Name : Et1
    Administrative Speed: 10G
    Administrative Duplex: full
    Operational Speed: 10G (forced)
    Operational Duplex: full (forced)
    Media Type: 10GBASE-SRL

PHY

PHY information for each Ethernet interface is viewed by entering the show interfaces phy command.

Example

This command summarizes PHY information for Ethernet interfaces 1-3.
switch#show interfaces ethernet 1-3 phy
Key:
   U    = Link up
   D    = Link down
   R    = RX Fault
   T    = TX Fault
   B    = High BER
   L    = No Block Lock
   A    = No XAUI Lane Alignment
   0123 = No XAUI lane sync in lane N

                                  State    Reset
Port           PHY state        Changes    Count PMA/PMD PCS   XAUI
-------------- --------------- -------- -------- ------- ----- --------
Ethernet1      linkUp             14518     1750 U..     U.... U.......
Ethernet2      linkUp             13944     1704 U..     U.... U.......
Ethernet3detectingXcvr          3        1               D..A0123
switch>

Negotiated Settings

Speed, duplex, and flow control settings are displayed through the show interfaces hardware, PHY information for each Ethernet interface is viewed by entering the show interfaces hardware, show interfaces flow-control, and show interfaces status commands.

Examples
  • This command displays speed/duplex and flow control settings for Ethernet interface 1.
    switch#show interfaces ethernet 1 hardware
    Ethernet1
      Model:        DCS-7150S-64-CL
      Type:         10GBASE-SR
      Speed/Duplex: 10G/full
      Flowcontrol:  rx-(off,on),tx-(off,on)
    switch>
  • This command shows the flow control settings for Ethernet interfaces 1-2.
    switch#show flow-control interface ethernet 1-2
    Port       Send FlowControl  Receive FlowControl  RxPause       TxPause
               admin    oper     admin    oper
    ---------  -------- -------- -------- --------    ------------- -------------
    Et1        off      off      off      off         0             0
    Et2        off      off      off      off         0             0
    switch>
  • This command displays the speed type and duplex settings for management interfaces 1-2.
    switch#show interfaces management 1-2 status
    Port      Name              Status       Vlan        Duplex  Speed Type
    Ma1                         connected    routed      a-full a-100M 10/100/1000
    Ma2                         connected    routed      a-full   a-1G 10/100/1000
    switch>

Ingress Counters

The Ingress counters enables the switch to count the ingress traffic on the Layer 3 ports of the switch.

Any ingress traffic on Layer 3 sub-interfaces and VLAN interface with IPv4 and IPv6 addresses are accounted irrespective of the routing decision. The VLAN counters are supported on DCS- 7050x, DCS-7250x, and DCS-7300x series switches and not supported on any routed ports.

Configuring Ingress Counters

The hardware counter feature in command enables the switch to count the ingress traffic on the Layer 3 port of the switch. Any traffic on Layer 3 sub-interfaces and VLAN interface with IPv4 and IPv6 addresses are accounted irrespective of the routing decision.

Examples
  • This command configures the ingress traffic count on the sub-interfaces. The no form of the command disables the counter configuration from the switch ports.
    switch#hardware counter feature subinterface in
  • This command configures the ingress traffic count on the VLAN interface. The no form of the command disables the counter configuration from the VLAN configured switch ports.
    switch#hardware counter feature vlan-interface in

Displaying the Ingress Counter Information

The show interface counters command displays the Layer 3 ingress traffic count information. Run this command to view the traffic counts on a sub-interface or VLAN interface of the switch. The clear counters command resets the counters to 0.

Example

This command displays the ingress traffic count on a VLAN interface vl12.
switch#show interface vl12 counters incoming
L3 Interface InOctets InUcastPkts InMcastPkts
Vl12           3136          47           2

Configuring Ingress Traffic-Class Counters

Ingress traffic class counter support is enabled in order to display per traffic-class counters on ingress interfaces, and supported on routed-ports and subinterfaces. Both packet and octet counts are displayed.

Examples
  • This command enables traffic-class counter support.
    switch(config)#hardware counter feature traffic-class in
  • This command enables TCAM profile tc-counters if this profile is configured.
    switch(config)#hardware tcam profile tc-counters

Hardware Counter Support

Hardware counter support allows enabling counters for features using programmable hardware counter resources.

Hardware counter support can be used to count the following feature specific counters:
  • Ingress VLAN-interface counters count the packets/octets ingressing through a VLAN interface.
  • Egress VLAN-interface counters count the packets/octets egressing a VLAN interface.
  • Ingress subinterface counters count the packets/octets ingressing through a subinterface.
  • Egress subinterface counters count the packets/octets egressing a subinterface.
  • VXLAN VNI counters count the packets/octets encapsulated/decapsulated per VNI.
  • VXLAN VTEP counters count the packets/octets encapsulated/decapsulated per VTEP.
  • Route counter for IPv4/IPv6 routes count the packets/octets routed using the route entry.
  • Ingress GRE Tunnel Interface counters count the packets/octets ingressing through the GRE Tunnel Interface.
  • Egress GRE Tunnel Interface counters count the packets/octets egressing through the GRE Tunnel Interface.

Hardware Counter Support Configuration

You can enable the Hardware Counter feature on a per-feature basis using the hardware counter feature command. The no hardware counter feature disables the feature. Multiple ingress and egress hardware counter features can work concurrently. Review MRU Enforcement Limitations for details.

Note: Enabling the hardware counter features may impact the transit traffic.
Ingress VLAN Interface Counters

The hardware counter feature vlan-interface in command enables the counting of ingress VLAN interface counters. When configured, the switch counts the number of unicast packets, multicast packets, and total octets ingressing through the VLAN interface for every VLAN interface configured in the system.

Example
switch#[no]hardware counter feature vlan-interface in
Egress VLAN Interface Counters

Thehardware counter feature vlan-interface out command enables the counting of egress VLAN interface counters. When configured, the switch counts the number of unicast packets, multicast packets, and total octets egressing the VLAN interface for every VLAN interface configured in the system.

Example
switch#[no]hardware counter feature vlan-interface out
Ingress SubInterface Counters

The hardware counter feature subinterface in command enables the counting of ingress subinterface counters. When configured, the switch counts the number of unicast packets, multicast packets, and total octets ingressing through the subinterface for every L3 subinterface configured in the system.

Example
switch#[no]hardware counter feature subinterface in
Egress SubInterface Counters

The hardware counter feature subinterface out command enables the counting of egress subinterface counters. When configured, the switch counts the number of unicast packets, multicast packets, and total octets egressing the subinterface for every L3 subinterface configured in the system.

Example
switch#[no]hardware counter feature subinterface out
VXLAN VNI Encapsulation Counters

The hardware counter feature vni encap command enables the counting of per VNI encap counters. When enabled, the switch counts the number of packets and bytes egressing a VNI through VTI, encap BUM packets, and the number of encap packets dropped due to any reason.

Example
switch(config)#[no]hardware counter feature vni encap
VXLAN VNI Decapsulation Counters

The hardware counter feature vni decap command enables the per VNI decap counters. When enabled, the switch counts the number of packets/octets received from VTEP and decapsulated for each VNI.

Example
switch(config)#[no]hardware counter feature vni decap
Route Counters

The hardware counter feature route command configures the route counters for the specified IP version and ip-address/ip-prefix. When enabled, the switch counts the number of packets/bytes hitting a route. The VRF name is optional and default VRF is assumed if no VRF is specified.

Example
switch(config)#[no]hardware counter feature route[ipv4|ipv6]vrf <name>][ip-address|ip-address-prefix]
GRE Tunnel Interface Encapsulation Counters

The hardware counter feature gre tunnel interface out command enables GRE Tunnel Interface encap counters. When enabled, the switch counts the number of unicast GRE packets and total octets getting encapsulated on the Tunnel Interface.

Example
switch(config)#[no]hardware counter feature gre tunnel interface out
GRE Tunnel Interface Decapsulation Counters

The hardware counter feature gre tunnel interface in command enables GRE Tunnel Interface decap counters. When enabled, the switch counts the number of unicast GRE packets and total octets getting decapsulated on the Tunnel Interface.

Example
switch(config)#[no]hardware counter feature gre tunnel interface in

MRU Enforcement Show commands

The MRU on an interface is found in the show interface output.

switch(config)#show interface ethernet 1
Ethernet1 is up, line protocol is up (connected)
  Hardware is Ethernet, address is 444c.a8b7.1ed8 (bia 444c.a8b7.1ed8)
  Member of Port-Channel10
  Ethernet MTU 10178 bytes, Ethernet MRU 1500 bytes, BW 10000000 kbit
  Full-duplex, 10Gb/s, auto negotiation: off, uni-link: disabled.
Counter

MRU dropped packets are counted per-chip.

The Ethernet interfaces corresponding chip are found in the show platform fap mapping output.
switch(config)#show platform fap mapping interface Ethernet 1
Jericho0 (FapId: 0  BaseSystemCoreId: 0)
Port             SysPhyPort   Voq   Core  FapPort  OtmPort BaseQPair QPairs Xlge NifPort
----------------------------------------------------------------------------------------
Ethernet1        100          2608  0      2       0        0         8     8     33
Reassembly Errors use per-chip counters from the show hardware counter drop output.
switch(config)#show hardware counter drop
Type  Chip       CounterName       : Count    : First Occurrence    : Last Occurrence
-----------------------------------------------------------------------------------------
A     Jericho0   ReassemblyErrors  : 12132989 : 2020-09-22 17:05:45 : 2020-09-22 17:22:40

MRU Enforcement Limitations

  • The number of features for which the hardware counters can be enabled simultaneously is limited by the availability of counter hardware resources in the system. When the configured hardware features exceed the available counter resources, not all counters for all features are available.
    • At lower scales of the feature key (for example, the number of interfaces in the case of subinterface/SVI counters), you can typically concurrently support up to six (6) ingress features and three (3) egress features. As scales grow beyond table sizes, single features use multiple tables.
  • Route counters do not support the counting of host routes or ALPM routes.
  • Packets sent from the CPU are not included in egress counters.

Configuring Power over Ethernet (PoE)

Power over Ethernet (PoE) is enabled by default on all Ethernet ports of PoE-capable switches, and the switch will detect IEEE-compliant powered devices (PDs) when they are plugged into a port and supply power appropriately.

Limitations

  • Ethernet ports will not detect non IEEE-compliant devices by default, and may not be able to detect or power them even if configured to do so.
  • If attached PDs overload the switch, it will power off. This can occur when an attached PD increases its power demand via LLDP, when too many PDs are connected to the switch, or when a power supply fails on a heavily loaded dual-supply switch.
  • Power-cycling the switch will cause temporary loss of power to attached PDs.
  • PoE is not available on management interfaces.

Disabling PoE on an Interface

On switches which support PoE, it is enabled by default on all Ethernet ports but can be disabled per-port with the poe disabled command.

Example

These commands disable PoE on Ethernet interface 5.
switch(config)#interface ethernet 5
switch(config-if-Et5)#poe disabled
switch(config-if-Et5)#

PoE Power Settings

When an IEEE-compliant powered device (PD) is connected to a PoE-enabled Ethernet port, it is recognized by a specific resistor signature, and its initial power needs are determined by hardware negotiation, after which further negotiation is managed through the Link Layer Discovery Protocol (LLDP). For details, see Configuring LLDP for Power over Ethernet.

PoE power output can be limited on a port using the poe limit command. The power limit represents the power output at the Ethernet port; actual power delivered to the PD will be lower due to power loss along the Ethernet cable.

Note: LLDP uses Power Via MDI type-length-value elements (TLVs) to allow the switch to dynamically negotiate power needs with PDs. LLDP will not include Power Via MDI TLVs for the interface if a power limit has been configured on it.

Examples

  • These commands limit nominal PoE power output on Ethernet interface 5 to 10 W.
    switch(config)#interface ethernet 5
    switch(config-if-Et5)#poe limit 10 watts
    switch(config-if-Et5)#
  • These commands limit nominal PoE power output on Ethernet interface 7 to 4 W.
    switch(config)#interface ethernet 7
    switch(config-if-Et7)#poe limit class 1
    switch(config-if-Et7)#

Detecting Legacy PDs

IEEE-compliant powered devices (PDs) are recognized by a specific resistance signature to a test signal sent by the switch, but non-compliant (legacy or proprietary) PDs may use a capacitive signature instead. By default, legacy PD detection is disabled, and legacy devices are not powered.

To configure an interface to use hardware detection for these non-compliant PoE devices and attempt to power them, use the poe legacy detect command.

Note: Non IEEE-compliant PDs are not officially supported. Arista cannot guarantee compatibility with such devices, and they may not be detected even when legacy detection is enabled on the port they are connected to.

Example

These commands configure Ethernet interface 5 to attempt to detect and power non-compliant PDs.
switch(config)#interface ethernet 5
switch(config-if-Et5)#poe legacy detect
switch(config-if-Et5)#

Displaying PoE Information

To display PoE information for a specific interface range or for all Ethernet interfaces, use the show poe command.

Example

This command displays PoE information for Ethernet interface 46.
switch(config)#show poe interface ethernet 46
show poe interface ethernet 46
PSELLDPPowerGrantedPort
Port Enabled Enabled Limit  Power   State   Class  Power Current Voltage Temperature
---- ------- ------- ------ ------- ------- ------ ----- ------- ------- -----------
46      True    True 15.40W 15.40W  powered class0  1.40W 27.00mA 55.04V  41.25C
switch(config-if-Et7)#

Configuring Link Fault Signaling

As part of the Link Fault Signaling (LFS) configuration, a new configuration mode called theEthernet Operations Administration and Management (EOAM) mode is introduced. The EOAM profile has a link-error sub-mode wherein the threshold, action, and the period is configured for both FCS and Symbol errors. The period can be in seconds or in number of frames. The default values are threshold 0, action syslog, and period 0 seconds. If the errors exceed the threshold within the given period, the configured action is executed. The recovery time configures the recovery timeout value for link fault signaling. Only one EOAM profile is associated with a port.

The following steps enable configuring the LFS parameters:

  1. Enable the EOAM mode.
    switch(config)#monitor ethernet oam
  2. Create an EOAM profile named as profile1.
    switch(config-eoam)#profile profile1
  3. Enter the EOAM link-error sub-mode.
    switch(config-eoam-profile-profile1)#link-error
  4. Enter the commands in the profile link-error submode to configure a specific LFS parameter.
    
    switch(config-eoam-profile-profile1-link-error)#symbol action errdisable
    switch(config-eoam-profile-profile1-link-error)#symbol period 300 frames
    switch(config-eoam-profile-profile1-link-error)#symbol threshold 20
    switch(config-eoam-profile-profile1-link-error)#recovery-time 40
  5. Apply the EOAM profile profile1 to the Ethernet interface 1/1.
    
    switch(config)#interface ethernet 1/1
    switch(config-if-Et1/1)#monitor ethernet oam profile profile1

Configuring Hardware TCAM

Ternary Content-Addressable Memory (TCAM) is a specialized type of high-speed memory that increase the speed of route look-up, packet classification, packet forwarding and access control list-based commands. The hardware tcam command is used to configure and place the switch in the TCAM mode. In this mode the user can configure few TCAM related commands such as feature, profile and system.

In the TCAM mode, use the feature command to configure the reservation of TCAM banks for the features like ACL, IPsec, flow-spec, l2-protocol, PBR, QoS, TCP-MSS-ceiling, traffic-policy. The profile command configures a new TCAM profile, or just copy the TCAM profile which is already created using the hardware tcam profile command such as default, mirroring-acl, pbr-match-nexthop-group, qos, tap-aggregation-default, tap-aggregation-extended, tc-counters, test, vxlan-routing. Similarly, the system command configures the system-wide TCAM profiles.

Example

This command places the switch in Hardware TCAM configuration mode.
switch(config)#hardware tcam
switch(config-hw-tcam)#

These are the commands allowed to configure in Hardware TCAM mode.

Examples
  • This command allow the switch to configure the TCAM feature.
    switch(config)#hardware tcam
    switch(config-hw-tcam)#feature
  • This command allow the switch to configure TCAM profile.
    switch(config)#hardware tcam
    switch(config-hw-tcam)#profile
  • This command allow the switch to configure TCAM system profile.
    switch(config)#hardware tcam
    switch(config-hw-tcam)#system

CPU Traffic Policy

Create a TCAM profile to enable actions such as permit, deny, and police in hardware before the traffic gets to the kernel for processing. The action is taken based on IP packet header information such as DSCP, L4 port values, fragmentation bits, etc.

TCAM Profile Example

The following file extract displays an example of a TCAM profile, cpu-traffic-policy, with features configured to enable CPU traffic policy.

hardware tcam
   profile cpu-traffic-policy
      feature acl port ip
         sequence 45
         key size limit 160
         key field dscp dst-ip ip-frag ip-protocol l4-dst-port l4-ops l4-src-port src-ip tcp-control ttl
         action count drop
         packet ipv4 forwarding bridged
         packet ipv4 forwarding routed
         packet ipv4 forwarding routed multicast
         packet ipv4 mpls ipv4 forwarding mpls decap
         packet ipv4 mpls ipv6 forwarding mpls decap
         packet ipv4 non-vxlan forwarding routed decap
         packet ipv4 vxlan eth ipv4 forwarding routed decap
         packet ipv4 vxlan forwarding bridged decap
      feature acl port ipv6
         sequence 25
         key field dst-ipv6 ipv6-next-header ipv6-traffic-class l4-dst-port l4-ops-3b l4-src-port src-ipv6-high src-ipv6-low tcp-control
         action count drop mirror
         packet ipv6 forwarding bridged
         packet ipv6 forwarding routed
         packet ipv6 forwarding routed multicast
         packet ipv6 ipv6 forwarding routed decap
      feature acl subintf ip
         sequence 40
         key size limit 160
         key field dscp dst-ip ip-frag ip-protocol l4-dst-port l4-ops-18b l4-src-port src-ip tcp-control ttl
         action count drop mirror
         packet ipv4 forwarding routed
      feature acl subintf ipv6
         sequence 15
         key field dst-ipv6 ipv6-next-header l4-dst-port l4-src-port src-ipv6-high src-ipv6-low tcp-control
         action count drop mirror redirect
         packet ipv6 forwarding routed
      feature counter lfib
         sequence 85
      feature mpls
         sequence 5
         key size limit 160
         action drop redirect set-ecn
         packet ipv4 mpls ipv4 forwarding mpls decap
         packet ipv4 mpls ipv6 forwarding mpls decap
         packet mpls ipv4 forwarding mpls
         packet mpls ipv6 forwarding mpls
         packet mpls non-ip forwarding mpls
      feature mpls pop ingress
         sequence 90
      feature pbr mpls
         sequence 65
         key size limit 160
         key field mpls-inner-ip-tos
         action count drop redirect
         packet mpls ipv4 forwarding mpls
         packet mpls ipv6 forwarding mpls
         packet mpls non-ip forwarding mpls
      feature qos ip
         sequence 75
         key size limit 160
         key field dscp dst-ip ip-frag ip-protocol l4-dst-port l4-ops l4-src-port src-ip
         action set-dscp set-policer set-tc
         packet ipv4 forwarding routed
         packet ipv4 forwarding routed multicast
         packet ipv4 mpls ipv4 forwarding mpls decap
         packet ipv4 mpls ipv6 forwarding mpls decap
         packet ipv4 non-vxlan forwarding routed decap
      feature qos ipv6
         sequence 70
         key field dst-ipv6 ipv6-next-header ipv6-traffic-class l4-dst-port l4-src-port src-ipv6-high src-ipv6-low
         action set-dscp set-policer set-tct
         packet ipv6 forwarding routed
      feature traffic-policy cpu ipv4
         sequence 1
         key size limit 160
         key field dst-ip ip-frag ip-protocol l4-dst-port l4-src-port src-ip
         action count set-drop-precedence set-policer
      feature traffic-policy cpu ipv6
         sequence 2
         key field dst-ipv6 ipv6-next-header l4-dst-port l4-src-port src-ipv6-high src-ipv6-low
         action count set-drop-precedence set-policer
   system profile cpu-traffic-policy

Configuring the Policy

The following configures cpu-traffic-policy under the traffic-policies global configuration mode.
traffic-policies
  cpu traffic-policy <name> vrf <vrf-list>
  traffic-policy <name>
    match <rule-name> <ipv4 | ipv6> [ <after | before> <rule-name> ]         
      source prefix       A.B.C.D/E [ A.B.C.D/E ]
      destination prefix  A.B.C.D/E [ A.B.C.D/E ]
      protocol <protocol-list> | {tcp,udp}
                          [ source port <port-list> | 
                                        field-set <port-set-name> ] |
                          [ destination port <port-list> |
                                        field-set <port-set-name> ]
      actions
         drop
         police rate <rate> <unit>
         count
The following applies the policies to the VRFs. The policy is applied to all interfaces belonging to the VRF.
traffic-policies
  cpu traffic-policy <name> vrf all

Default Rules

The ipv4-all-default and ipv6-all-default are programmed by default and cannot be reordered, or removed. Only the associated action can be changed. The permit rule is never installed and is the default action for packet processing.

Examples

L3 Protocol Match Criteria (protocol neighbors bgp)

The following displays the configuration of a profile to match on a set of configured protocol peers which allows only TCP traffic from those BGP peers.
traffic-policies
  cpu traffic-policy <name> vrf <vrf-list>
  traffic-policy <name>
    match <rule-name> <ipv4 | ipv6> [ <after | before> <rule-name> ]         
      source prefix       A.B.C.D/E [ A.B.C.D/E ]
      destination prefix  A.B.C.D/E [ A.B.C.D/E ]
      protocol <protocol-list> | {tcp,udp}
                          [ source port <port-list> | 
                                        field-set <port-set-name> ] |
                          [ destination port <port-list> |
                                        field-set <port-set-name> ]
      actions
         drop
         police rate <rate> <unit>
         count

traffic-policies
  cpu traffic-policy <traffic-policy-name> vrf all
    match <rule-name> <ipv4 | ipv6> [ <after | before> <rule-name> ]        
      protocol neighbors bgp
      actions
         drop

traffic-policies
   cpu traffic-policy foo vrf all
      traffic-policy foo
         match BGP ipv4
            protocol neighbors bgp
The following policy permits dynamic peers from the listen-range 2.0.0.0/24 and all IPv6 BGP LL peers.
traffic-policies
   traffic-policy cpuPolicy
      match BGP ipv4
         protocol neighbors bgp
      match BGP-DYN ipv4
         source prefix 2.0.0.0/24
      match BGP-LL ipv6
         source prefix fe80::/64
Note: Configuring any match criteria will result in a CLI error when combined with the protocol neighbor bgp match criteria as these conflict with the expanded BGP rules.
The following displays error messages with conflicting configurations.
traffic-policies
   traffic-policy cpuPolicy
      match BGP ipv4
         protocol neighbors bgp
         source prefix 1.0.0.1/32
! The ‘source prefix’ subcommand is not supported when the ‘protocol neighbors’ subcommand is configured.

traffic-policies
   traffic-policy cpuPolicy
      match BGP ipv4
         source prefix 1.0.0.1/32
         protocol neighbors bgp
! The ‘protocol neighbors’ subcommand is not supported when any other match subcommands are configured.

Deny other BGP Traffic

The following displays a policy to whitelist some BGP sessions and other management IPs or IP protocol. The policy is inadequate as attempts to create BGP sessions from 1.0.0.0/24 (for example) will pass through this policy unfiltered.
traffic-policies
   cpu traffic-policy CPU vrf all   
   traffic-policy CPU
      match BGP ipv4
         protocol neighbors bgp
      match BFD ipv4
         source address 1.0.0.0/24 1.0.1.0/24 1.0.4.0/24
      match ipv4-all-default ipv4
         actions
            drop
      match ipv6-all-default ipv6
         actions
            drop
The following displays a policy to whitelist some BGP sessions and other management IPs or IP protocol. The policy is effective and easier to implement for administrators.
traffic-policies
   cpu traffic-policy CPU
   traffic-policy CPU
      match BGP ipv4
         protocol neighbors bgp
      match BGP-REST ipv4
         protocol tcp udp destination port 179
         actions
            drop
      match BFD ipv4
         source address 1.0.0.0/24 1.0.1.0/24 1.0.4.0/24
      match ipv4-all-default ipv4
         actions
            drop
      match ipv6-all-default ipv6
         actions
            drop
The following displays a policy to whitelist some BGP sessions and other management IPs or IP protocol. The policy is effective and easier to implement for administrators. The clause matches on any inbound traffic destined for the configured BGP port(s).
traffic-policies
   cpu traffic-policy CPU
   traffic-policy CPU
      match BGP ipv4
         protocol neighbors bgp
      match BGP-REST ipv4
         protocol bgp
         actions
            drop
      match BFD ipv4
         source address 1.0.0.0/24 1.0.1.0/24 1.0.4.0/24
      match ipv4-all-default ipv4
         actions
            drop
      match ipv6-all-default ipv6
         actions
            drop
Actions

Drop: packet is discarded on a match

Police: tracks the usage for each BGP neighbor, and holds it to a maximum rate.

The police rate <rate-value> [rate-unit] command sets the policing rate. The optional rate-unit are bps, kbps (default), mbps, and gbps. The following configures a policing rate of 15 kbps for each BGP neighbor.
traffic-policies
   cpu traffic-policy CPU vrf all
   traffic-policy CPU
      match BGP ipv4
         protocol neighbors bgp
         actions
            police rate 15 kbps

Count

The following enables counters for the CPU traffic policy to count all packets matching the rule in which the count action is configured.
no hardware counter feature acl out <address-family>

hardware counter feature traffic-policy cpu

traffic-policies
   cpu traffic-policy CPU vrf all
   traffic-policy CPU
      match BGP ipv4
         protocol neighbors bgp
         actions
            count
Use-case Scenarios
Securing BGP Neighbors
The following implements a policy to secure BGP neighbors.
traffic-policies
   cpu traffic-policy CPU-DEFAULT vrf all
   traffic-policy CPU-DEFAULT
      match ICMPV6 ipv6
         protocol icmpv6
      match BGP ipv4
         protocol neighbors bgp
      match BGP-OTHER ipv4
         protocol bgp
         actions
            drop
      match BGP6 ipv6
         protocol neighbors bgp
      match BGP-OTHER6 ipv6
         protocol bgp
         actions
            drop
      match OSPF ipv4
         protocol ospf
      match ipv4-all-default ipv4
         actions
            drop
      match ipv6-all-default ipv6
         actions
            drop
Whitelist BFD Neighbors (not neighbor-specific)
Add the following rule to Whitelist BFD Neighbors.
traffic-policies
   traffic-policy CPU-DEFAULT
      match BFD-DPORT ipv4
         protocol udp destination port 3784-3785
      match BFD-SPORT ipv4
         protocol udp source port 49152
      match BFD-DPORT6 ipv6
         protocol udp destination port 3784-3785
      match BFD-SPORT6 ipv6
         protocol udp source port 49152
      match ipv4-all-default ipv4
         actions
            drop
      match ipv6-all-default ipv6
         actions
            drop
Whitelist a few Common Control-plane Protocols and Deny others
Add the following rule to Whitelist protocols such as ICMPv6 while denying others.
traffic-policies
   cpu traffic-policy CPU-DEFAULT vrf all
   traffic-policy CPU-DEFAULT
      match ICMPV6 ipv6
         protocol icmpv6
      match BGP ipv4
         protocol neighbors bgp
      match BGP-OTHER ipv4
         protocol bgp
         actions
            drop
      match BGP6 ipv6
         protocol neighbors bgp
      match BGP-OTHER6 ipv6
         protocol bgp
         actions
            drop
      match OSPF ipv4
         protocol ospf
      match PIM4 ipv4
         protocol pim
      match PIM6 ipv6
         protocol pim
      match ipv4-all-default ipv4
         actions
            drop
      match ipv6-all-default ipv6
         actions
            drop

TCAM Profile for Configurable Port Qualifier Sizing

A TCAM profile can be created from scratch, or the feature can be added to a copy of the default TCAM profile. When creating a profile from scratch, care must be taken to ensure that all needed TCAM features are included in the profile.

Modifying a Default TCAM Profile to allow Dynamic Sizing for ACL Labels

The following commands create a copy of the default TCAM profile, name it port-qualifier-size, and configure it to support a 6-bit dynamic sizing for ACL labels for IPKGV. Once the profile has been created, it can be applied to the system.

switch(config)#hardware tcam
switch(config-hw-tcam)#profile port-qualifier-size copy default
switch(config-hw-tcam-profile-port-qualifier-size)#feature port-qualifier-size ip copy 
system-feature-source-profile
switch(config-hw-tcam-profile-port-qualifier-size-feature-port-qualifier-size)#port-qualifier-size 6
switch(config-hw-tcam-profile-port-qualifier-size-feature-port-qualifier-size)#exit
switch(config-hw-tcam-profile-port-qualifier-size)#feature acl port ip
switch(config-hw-tcam-profile-port-qualifier-size)#exit
switch(config-hw-tcam)#exit
switch(config)#

Verifying the Configuration of Dynamic Qualifier Size

The following command verifies the configuration.
switch#show running-config
hardware tcam
   profile port-qualifier-size
      feature acl port ip
         port qualifier size 6 bits

Verifying the Configuration of System Profile

The following command verifies the system profile was configured and applied successfully. The profile name appears in both the Configuration and Status columns.
switch#show harware tcam profile
                     Configuration                      Status
Linecard1            port-qualifier-size                port-qualifier-size
Linecard2            port-qualifier-size                port-qualifier-size
Linecard3            port-qualifier-size                port-qualifier-size
When the profile does not get applied correctly, the Status column shows Error.
switch#show harware tcam profile
                     Configuration                      Status
Linecard1            port-qualifier-size                ERROR
Linecard2            port-qualifier-size                ERROR
Linecard3            port-qualifier-size                ERROR
Note: The packet type, the key field must be set. The dynamic qualifier size can be set for ACL. Not all hardware platforms support this feature. Modular systems require all linecards to support this feature for the profile to be applicable.

Ethernet Configuration Commands

Global Configuration Commands

Hardware TCAM Commands

Interface Configuration CommandsEthernet and Management Interfaces

EOAM Configuration Commands

Link-error Configuration Commands

Interface Display Commands

400GBASE-ZR Transceivers Display Commands

Shared Support across Multiple Subinterfaces Commands

action

The action command configures the link monitoring action that is specified for the link fault signaling event.

The no actioncommand removes the action type specified for the chosen link fault signaling. The default action command configures the link monitoring action as system log type.

Command Mode

Link-error Configuration

Command Syntax

{fcs | symbol} action [linkfault | errdisable | log]

no {fcs | symbol} action [linkfault | errdisable | log]

default {fcs | symbol} action [linkfault | errdisable | log]

Parameters
  • fcs Inbound packets with frame check sequence (FCS) error.
  • symbol Inbound packets with symbol error.
  • linkfault The link fault action type.
  • errdisable The errdisable action type.
  • log The system log action type.
Related Commands

Example

These commands set the errdisable action type for the profile profile1 in the Link-error configuration mode for symbol error.

switch(config)#monitor ethernet oam
switch(config-eoam)#profile profile1
switch(config-eoam-profile-profile1)#link-error
switch(config-eoam-profile-profile1-link-error)#symbol action errdisable

clear counters

The clear counters command in privileged EXEC mode resets the counters to zero for the specified interfaces including VLAN interfaces, Sub-Interfaces, and GRE Tunnel Interfaces.

Command Mode

Privileged EXEC

Command Syntax

clear counters [vlan vlanId | Tunnel tunnelID][[route][ipv4 | ipv6][vrf]]

Parameters
  • vlan vlanId Clears the VLAN Interface and subinterface Ingress and Egress counters.
  • Tunnel tunnelID Allows the command to be used for clearing counters only for the specified VLAN interface.
  • routeClears the route counters.
    • ipv4 Allows targeting the clearing of IPv4 route counters.
    • ipv6 Allows targeting the clearing of IPv6 route counters.
  • vrf Allows specifying the VRF to only clear the route counters for the VRF.
Examples
  • Clears the VLAN Interface and subinterface ingress and egress counters.

    switch#clear counters[vlan vlanId]
  • Clears the GRE Tunnel Interface Ingress and Egress counters.

    switch#clear counters[tunnel TunnelId]

clear vxlan counters

Use the clear vxlan counters command to clear the VXLAN encap and decap counters.

Command Mode

EXEC

Command Syntax

clear vxlan counters [[vni | [vtep [vtep-ip-address | unlearnt]]]

Parameters
  • vni Clears the VXLAN counters.
  • vtep Clears the VTEP counters.
    • vtep-ip-address Clears the counters for the specified VTEP.
    • unlearnt Clears the counters for unlearned VTEPs. Unlearned VTEPs track the counts of packets received by the switch before the VTEP is learned.

feature

The feature command allows the user to reserve the number of TCAM banks for the following features such as ACL, flow-spec, IPsec, l2-protocol, PBR, QoS, TCP-MSS-ceiling, traffic-policy.

Theexit command returns the switch to global configuration mode.

Command Mode

Hardware TCAM

Command Syntax

feature

Example

This commands allows the switch to configure the TCAM flow-spec feature for IPv4 ports.
switch(config-hw-tcam)#feature flow-spec port ipv4 bank maximum count 12

flowcontrol receive

The flowcontrol receive command configures administrative settings for inbound flowcontrol packets. Ethernet ports use flow control to delay packet transmission when port buffers run out of space. Ports transmit a pause frame when their buffers are full, signaling their peer ports to delay sending packets for a specified period.

The flowcontrol receive command configures the configuration mode port's ability to receive flowcontrol pause frames.

  • off: port does not process pause frames that it receives.
  • on: port processes pause frames that it receives.
  • desired: port autonegotiates flow control; processes pause frames if the peer is set to send desired.

Desired is not an available parameter option. Ethernet data ports cannot be set to desired. Management ports are set to desired by default and with the no flowcontrol receive command.

The port linking process includes flow control negotiation. Ports must have compatible flow control settings to create a link. The table below lists the compatible flow control settings.

Table 8. Compatible Settings for Flow Control Negotiation – Local Port Receiving
local port peer port
receive on send on or send desired
receive off send off or send desired
receive desired send on , send off, or send desired

The no flowcontrol receive and default flowcontrol receive commands restore the default flowcontrol setting for the configuration mode interface by removing the corresponding flowcontrol receive command from running-config. The default setting is off for Ethernet data ports and desired for Management ports.

Command Mode

Interface-Ethernet Configuration

Interface-Management Configuration

Command Syntax

flowcontrol receive STATE

no flowcontrol receive

default flowcontrol receive

Parameters

STATE flow control pause frame processing setting. Options include:
  • On
  • Off

Example

These commands set the flow control received on Ethernet interface 5.
switch(config)#interface ethernet 5
switch(config-if-Et5)#flowcontrol receive on
switch(config-if-Et5)#

flowcontrol send

The flowcontrol send command configures administrative settings for outbound flow control packets. Ethernet ports use flow control to delay packet transmission when port buffers run out of space. Ports transmit a pause frame when their buffers are full, signaling their peer ports to delay sending packets for a specified period.

The flowcontrol send command configures the configuration mode port's ability to transmit flow control pause frames.
  • off: port does not send pause frames.
  • on: port sends pause frames.
  • desired: port autonegotiates flow control; sends pause frames if the peer is set to receive desired.

Desired is not an available parameter option. Ethernet data ports cannot be set to desired. Management ports are set to desired by default and with the no flowcontrol send command.

The port linking process includes flow control negotiation. Ports must have compatible flow control settings to create a link. Compatible Settings for Flow Control Negotiation Local Port Transmitting lists the compatible flow control settings.

Table 9. Compatible Settings for Flow Control Negotiation Local Port Transmitting
local port peer port
send on receive on or receive desired
send off receive off or receive desired
send desired receive on , receive off, or receive desired

The no flowcontrol send and default flowcontrol send commands restore the default flow control setting for the configuration mode interface by removing the corresponding flowcontrol send command from running-config. The default setting is off for Ethernet data ports and desired for Management ports.

Command Mode

Interface-Ethernet Configuration

Interface-Management Configuration

Command Syntax

flowcontrol send STATE

no flowcontrol send

default flowcontrol send

Parameters
STATE Flow control send setting. Options include:
  • on
  • off

Example

These commands set the flow control sent on Ethernet interface 5.
switch(config)#interface ethernet 5
switch(config-if-Et5)#flowcontrol send on
switch(config-if-Et5)#

hardware counter feature

You can enable on a per feature basis the hardware counter feature command from the global configuration mode. The no hardware counter feature disables the feature. Multiple ingress and egress hardware counter features can work concurrently.

Command Mode

Global configuration mode

Command Syntax

hardware counter feature [[vlan-interface | subinterface] [ in | out]][vni [encap | decap]][[route [ ipv4 | ipv6 ][ vrf name][ ip-address | ip-address-prefix]][[gre tunnel interface][ in | out]]

no hardware counter feature [[vlan-interface | subinterface] [ in | out]][vni [encap | decap]][[route [ ipv4 | ipv6 ][ vrf name][ ip-address | ip-address-prefix]][[gre tunnel interface][ in | out]]

Parameters
  • vlan-interface Enables VLAN interface counters
    • in Enables the counting of ingress VLAN interface counters. When configured, the switch counts the number of unicast packets, multicast packets and total octets ingressing through the VLANinterface for every VLAN interface configured in the system.
    • out Enables the counting of egress VLAN interface counters. When configured, the switch counts the number of unicast packets, multicast packets and total octets egressing the vlan interface for every vlan interface configured in the system.
  • subinterfaceEnables the counting subinterface counters.
    • inEnables the counting of ingress subinterface counters. When configured, the switch counts the number of unicast packets, multicast packets and total octets ingressing through the subinterface for every L3 subinterface configured in the system.
    • out Enables the counting of egress subinterface counters. When configured, the switch counts the number of unicast packets, multicast packets and total octets egressing the subinterface for every L3 subinterface configured in the system.
  • vniEnables the counting of per VNI counters.
    • encap Enables the per encap counters. When enabled, the switch counts the number of packets/octets coming from the edge, encapsulated on the device and directed towards the core.
    • decap Enables the per VTEP decap counters. When enabled, the switch counts the number of packets/octets coming from the core, decapsulated on the device and heading towards the edge per each VTEP.
  • routeConfigures the route counters for the specified ip version and ip-address/ip-prefix. When enabled, the switch counts the number of packets/bytes hitting a route.
    • ipv4Identifies the IPv4 route.
    • ipv6 Identifies the IPv6 route.
  • vrf name The VRF name is optional and default VRF is assumed if no VRF is specified.
  • ip-address Specifies the target IP address.
  • ip-address-prefix Specifies the target IP address prefix.
  • gre tunnel interfaceEnables GRE tunnel interface counters.
    • in Enables GRE tunnel interface decap counters. When enabled, the switch counts the number of unicast GRE packets and total octets getting decapsulated on the tunnel interface.
    • out Enables GRE Tunnel Interface encap counters. When enabled, the switch counts the number of unicast GRE packets and total octets getting encapsulated on the Tunnel Interface.

Examples

switch#hardware counters feature vlan-interface in
switch#hardware counter feature vlan-interface out
switch#hardware counter feature subinterface in
switch#hardware counter feature subinterface out
switch(config)#hardware counter feature vni encap
switch(config)#hardware counter feature vni decap
switch(config)#hardware counter feature vtep encap
switch(config)#hardware counter feature vtep decap
switch(config)#hardware counter feature gre tunnel interface in
switch(config)#hardware counter feature gre tunnel interface out

hardware counter feature in (DCS-7050x, 7350x, 7300x)

The hardware counter feature command enables the switch to count the ingress traffic on the Layer 3 port of the switch. Any traffic on Layer 3 sub-interfaces and VLAN interface with IPv4 and IPv6 addresses are accounted irrespective of the routing decision.

The no hardware counter feature in command disable the counter configuration from the switch ports. By default the ingress counter is disabled on the switch.

Command Mode

Global Configuration

Command Syntax

hardware counter feature [INTERFACE]in

no hardware counter feature [INTERFACE]in

Parameters
INTERFACE Layer 3 interface on the switch.
  • subinterface Displays the subinterface traffic count.
  • vlan-interface Displays the VLAN-interface traffic count.
Examples
  • This command configures the ingress traffic count on the sub-interfaces.
    switch#hardware counter feature subinterface in
  • This command configures the ingress traffic count on the VLAN interface.
    switch#hardware counter feature vlan-interface in
  • These commands enable the QSFP+ interface in port group 1 and SFP+ interfaces in port group 2 on a DCS-7050Q-16 switch, display the port group status, and display interface status.
    
    switch(config)#hardware port-group 1 select Et15/1-4
    switch(config)#hardware port-group 2 select Et21-24
    switch(config)#show hardware port-group
    
    Portgroup: 1    Active Ports: Et17-20
    Port            State
    ------------------------------------------
    Ethernet17      ErrDisabled
    Ethernet18      ErrDisabled
    Ethernet19      ErrDisabled
    Ethernet20      ErrDisabled
    Ethernet15/1    Active
    Ethernet15/2    Active
    Ethernet15/3    Active
    Ethernet15/4    Active
    
    Portgroup: 2    Active Ports: Et16/1-4
    Port            State
    ------------------------------------------
    Ethernet16/1    Active
    Ethernet16/2    Active
    Ethernet16/3    Active
    Ethernet16/4    Active
    Ethernet21      ErrDisabled
    Ethernet22      ErrDisabled
    Ethernet23      ErrDisabled
    Ethernet24      ErrDisabled
    switch(config)#show interfaces status
    Port      Name              Status       Vlan        Duplex  Speed Type
    Et1/1                       connected    in Po621      full    40G 40GBASE-CR4
    Et1/2                       errdisabled  inactive    unconf unconf 40GBASE-CR4
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et15/1                      connected    in Po711      full    40G 40GBASE-CR4
    Et15/2                      errdisabled  inactive    unconf unconf Not Present
    Et15/3                      errdisabled  inactive    unconf unconf Not Present
    Et15/4                      errdisabled  inactive    unconf unconf Not Present
    Et16/1                      errdisabled  inactive    unconf unconf Not Present
    Et16/2                      errdisabled  inactive    unconf unconf Not Present
    Et16/3                      errdisabled  inactive    unconf unconf Not Present
    Et16/4                      errdisabled  inactive    unconf unconf Not Present
    Et17                        errdisabled  inactive    unconf unconf Not Present
    Et18                        errdisabled  inactive    unconf unconf Not Present
    Et19                        errdisabled  inactive    unconf unconf Not Present
    Et20                        errdisabled  inactive    unconf unconf Not Present
    Et21                        connected    425           full    10G 10GBASE-SRL
    Et22                        connected    611           full    10G 10GBASE-SRL
    Et23                        connected    in Po998      full    10G 10GBASE-SLR
    Et24                        connected    in Po998      full    10G 10GBASE-SLR
    switch(config)#
  • These commands enable the QSFP+ interface in port group 1 and SFP+ interfaces in port group 2 on a DCS-7050Q-16 switch, display the port group status, and display interface status.
    
    switch(config)#hardware port-group 1 select Et15/1-4
    switch(config)#hardware port-group 2 select Et21-24
    
    switch(config)#show hardware port-group
    
    Portgroup: 1    Active Ports: Et17-20
    Port            State
    ------------------------------------------
    Ethernet17      ErrDisabled
    Ethernet18      ErrDisabled
    Ethernet19      ErrDisabled
    Ethernet20      ErrDisabled
    Ethernet15/1    Active
    Ethernet15/2    Active
    Ethernet15/3    Active
    Ethernet15/4    Active
    
    Portgroup: 2    Active Ports: Et16/1-4
    Port            State
    ------------------------------------------
    Ethernet16/1    Active
    Ethernet16/2    Active
    Ethernet16/3    Active
    Ethernet16/4    Active
    Ethernet21      ErrDisabled
    Ethernet22      ErrDisabled
    Ethernet23      ErrDisabled
    Ethernet24      ErrDisabled
    switch(config)#show interfaces status
    Port      Name              Status       Vlan        Duplex  Speed Type
    Et1/1                       connected    in Po621      full    40G 40GBASE-CR4
    Et1/2                       errdisabled  inactive    unconf unconf 40GBASE-CR4
    <-------OUTPUT OMITTED FROM EXAMPLE-------->
    Et15/1                      connected    in Po711      full    40G 40GBASE-CR4
    Et15/2                      errdisabled  inactive    unconf unconf Not Present
    Et15/3                      errdisabled  inactive    unconf unconf Not Present
    Et15/4                      errdisabled  inactive    unconf unconf Not Present
    Et16/1                      errdisabled  inactive    unconf unconf Not Present
    Et16/2                      errdisabled  inactive    unconf unconf Not Present
    Et16/3                      errdisabled  inactive    unconf unconf Not Present
    Et16/4                      errdisabled  inactive    unconf unconf Not Present
    Et17                        errdisabled  inactive    unconf unconf Not Present
    Et18                        errdisabled  inactive    unconf unconf Not Present
    Et19                        errdisabled  inactive    unconf unconf Not Present
    Et20                        errdisabled  inactive    unconf unconf Not Present
    Et21                        connected    425           full    10G 10GBASE-SRL
    Et22                        connected    611           full    10G 10GBASE-SRL
    Et23                        connected    in Po998      full    10G 10GBASE-SLR
    Et24                        connected    in Po998      full    10G 10GBASE-SLR
    switch(config)#

hardware port-group

The hardware port-groupcommand configures a port group to activate a 40GBASE (QSFP+) interface or four 10GBASE (SFP+) interfaces, affecting QSFP+ and SFP+ availability.

The no hardware port-group and default hardware port-group commands restore a port groups default setting by removing the corresponding hardware port-group command from running-config. The QSFP+ interface is active by default in each port group.

The hardware port-group command is available on DCS-7050Q-16 and DCS-7050QX-32S switches, and has different parameters on each platform.

Command Mode

Global Configuration

Command Syntax

hardware port-group group_number select PORT_LIST

no hardware port-group group_number select PORT_LIST

default hardware port-group group_number select PORT_LIST

Parameters
  • group_number Label of the port group. Valid options are 1 and 2 on the 7050Q-16; only 1 is available on the 7050QX-32S.
  • PORT_LIST Ports activated by command. Options vary by platform and depend on group_number value.
    • DCS-7050Q-16
      • Et15/1-4 activates QSFP+ port on port group 1. Available when group_number is 1.
      • Et16/1-4 activates QSFP+ port on port group 2. Available when group_number is 2.
      • Et17-20 activates SFP+ ports on port group 1. Available when group_number is 1.
      • Et21-23 activates SFP+ ports on port group 2. Available when group_number is 2.
    • DCS-7050QX-32S
      • Et1-4 activates SFP+ ports on port group 1. Available when group_number is 1.
      • Et5/1-4 activates QSFP+ port on port group 1. Available when group_number is 1.

hardware tcam

The hardware tcam command places the switch in Hardware TCAM configuration mode.

The exit command returns the switch to global configuration mode.

Command Mode

Global Configuration

Command Syntax

hardware tcam

Related Commands

Example

This command places the switch in Hardware TCAM configuration mode.
switch(config)#hardware tcam
switch(config-hw-tcam)#

interface ethernet create

The interface ethernet create command is used to configure a range of Ethernet subinterfaces. The command places the switch in Ethernet-interface configuration mode for the specified range of subinterfaces.

Command Mode

Global Configuration

Command Syntax

interface ethernet create sub_range

Parameters

sub_range Range of subinterfaces to be configured. Subinterfaces are named by adding a period followed by a unique subinterface number to the name of the parent interface.

Example

This command enters interface configuration mode for Ethernet subinterfaces 1/1.1-100:
switch(config)#interface ethernet create 1/1.100
switch(config-if-Et1/1.1-100)#

interface ethernet

The interface ethernet command places the switch in Ethernet-interface configuration mode for the specified interfaces. The command can specify a single interface or multiple interfaces.

Ethernet interfaces are physical interfaces and are not created or removed.

Interface management commands include:
  • description
  • exit
  • load-interval
  • mtu
  • shutdown (Interfaces)
Ethernet management commands include:
  • flowcontrol
  • mac-address
  • speed

Chapters describing supported protocols and other features list additional configuration commands available from Ethernet interface configuration mode.

Command Mode

Global Configuration

Command Syntax

interface ethernet e_range

Parameters

e_range Ethernet interfaces (number, range, or comma-delimited list of numbers and ranges). Valid Ethernet numbers depend on the switchs available Ethernet interfaces.

Examples
  • This command enters interface configuration mode for Ethernet interfaces 1 and 2:
    switch(config)#interface ethernet 1-2
    switch(config-if-Et1-2)#
  • This command enters interface configuration mode for Ethernet interface 1:
    switch(config)#interface ethernet 1
    switch(config-if-Et1)#

interface management

The interface management command places the switch in management-interface configuration mode for the specified interfaces. The list can specify a single interface or multiple interfaces if the switch contains more than one management interface.

Management interfaces are physical interfaces and are not created or removed.

Interface management commands include:
  • description
  • exit
  • load-interval
  • mtu
  • shutdown (Interfaces)
Ethernet management commands include:
  • flowcontrol
  • mac-address
  • speed

Chapters describing supported protocols and other features list additional configuration commands available from management-interface configuration mode.

Command Mode

Global Configuration

Command Syntax

interface management m_range

Parameter

m_range Management interfaces (number, range, or comma-delimited list of numbers and ranges).

Valid management numbers depend on the switchs available management interfaces. A value of 0, where available, configures the virtual management interface on a dual-supervisor modular switch. Management interface 0 accesses management port 1 on the active supervisor of a dual-supervisor modular switch.

Examples
  • This command enters the interface configuration mode for management interfaces 1 and 2.
    switch(config)#interface management 1-2
    switch(config-if-Ma1-2)#
  • This command enters the interface configuration mode for management interface 1:
    switch(config)#interface management 1
    switch(config-if-Ma1)#

link-debounce

The link-debounce command configures the link debounce time for the configuration mode interface. Link debounce time is the time that advertisements for new link states are delayed after the link state is established. By default, debounce time is set to zero, disabling link debounce.

Debounce times for link-up and link-down transitions can be independently configured.
  • Link-up debounce time: the delay before an interface advertises link down to link up transitions.
  • Link-down debounce time: the delay before an interface advertises link up to link down transitions.

The no link-debounce and default link-debounce commands restore the default debounce setting for the configuration mode interface by removing the corresponding link-debounce command from running-config.

Command Mode

Interface-Ethernet Configuration

Interface-Management Configuration

Command Syntax

link-debounce time WAIT_TIME

no link-debounce time WAIT_TIME

default link-debounce time WAIT_TIME

Parameters
WAIT_TIME Link debounce period (milliseconds). All debounce values range from 0 (disabled) to 30000 (30 seconds). Options include:
  • 0 - 30000One debounce value assigned as both link up and link down.
  • 0 - 30000 0 - 30000Two debounce values: link up is first, link down is second.
Examples
  • These commands set the link-up and link-down debounce period to 10 seconds on Ethernet interface 5.
    switch(config)#interface ethernet 5
    switch(config-if-Et5)#link-debounce time 10000
    switch(config-if-Et5)#
  • These commands set the link-up debounce to 10 seconds and the link-down debounce period to zero on Ethernet interface 5.
    switch(config)#interface ethernet 5
    switch(config-if-Et5)#link-debounce time 10000 0
    switch(config-if-Et5)#
  • These commands set the link-up debounce to 0 and the link-down debounce period to 12.5 seconds on Ethernet interface 5.
    switch(config)#interface ethernet 5
    switch(config-if-Et5)#link-debounce time 0 12500
    switch(config-if-Et5)#

link-error

The link-error command places the Ethernet Operations, Administration, and Management (EOAM) profile in the EOAM link-error sub-mode.

The no link-error and default link-error commands exit from the EOAM link-error sub-mode.

Command Mode

EOAM Configuration

Command Syntax

link-error

no link-error

default link-error

Example

These commands place the EOAM profile profile1 in the link-error sub-mode.
switch(config)#monitor ethernet oam
switch(config-eoam)#profile profile1
switch(config-eoam-profile-profile1)#link-error
switch(config-eoam-profile-profile1-link-error)#

mac-address

The mac-address command assigns a MAC address to the configuration mode interface. An interfaces default MAC address is its burn-in address.

The no mac-address and default mac-address commands revert the interface to its default MAC address by removing the corresponding mac-address command from running-config.

Command Mode

Interface-Ethernet Configuration

Interface-Management Configuration

Command Syntax

mac-address address

no mac-address

default mac-address

Parameter

address MAC address assigned to the interface. Format is dotted hex notation (H.H.H). Disallowed addresses are 0.0.0 and FFFF.FFFF.FFFF.

Example

This command assigns the MAC address of 001c.2804.17e1 to Ethernet interface 7, then displays interface parameters, including the assigned address.
switch(config)#interface ethernet 7
switch(config-if-Et7)#mac-address 001c.2804.17e1
switch(config-if-Et7)#show interface ethernet 7
Ethernet3 is up, line protocol is up (connected)
  Hardware is Ethernet, address is 001c.2804.17e1 (bia 001c.7312.02e2)
  Description: b.e45
  MTU 9212 bytes, BW 10000000 Kbit
  Full-duplex, 10Gb/s, auto negotiation: off
  Last clearing of "show interface" counters never
  5 seconds input rate 7.84 kbps (0.0% with framing), 10 packets/sec
  5 seconds output rate 270 kbps (0.0% with framing), 24 packets/sec
     1363799 packets input, 222736140 bytes
     Received 0 broadcasts, 290904 multicast
     0 runts, 0 giants
     0 input errors, 0 CRC, 0 alignment, 0 symbol
     0 PAUSE input
     2264927 packets output, 2348747214 bytes
     Sent 0 broadcasts, 28573 multicast
     0 output errors, 0 collisions
     0 late collision, 0 deferred
     0 PAUSE output
switch(config-if-Et7)#

monitor ethernet oam profile

The monitor ethernet oam profile command applies the EOAM profile to the specific interface in interface configuration mode.

The no monitor ethernet oam profile and default monitor ethernet oam profile commands remove the EOAM profile from the interface.

Command Mode

Interface Configuration

Command Syntax

monitor ethernet oam profile name

no monitor ethernet oam profile

default monitor ethernet oam profile

Parameters

name The EOAM profile name. An EOAM profile cannot be named as summary.

Example

These commands apply the EOAM profile profile1 to the Ethernet interface 1/1.
switch(config)#interface ethernet 1/1
switch(config-if-Et1/1)#monitor ethernet oam profile profile1

monitor ethernet oam

The monitor ethernet oam command places the switch in the Ethernet Operations, Administration, and Management (EOAM) configuration mode.

The no monitor ethernet oam and default monitor ethernet oam commands exit from the EOAM configuration mode.

Command Mode

Global Configuration

Command Syntax

monitor ethernet oam

no monitor ethernet oam

default monitor ethernet oam

Example

This command places the switch in the EOAM configuration mode.
switch(config)#monitor ethernet oam
switch(config-eoam)#

period

The period command configures the link monitoring period that is specified for a link error in terms of number of frames or seconds.

Theno period command removes the period type specified on the chosen link error. The defaultperiodcommand configures the link monitoring period as zero seconds.

Command Mode

Link-error Configuration

Command Syntax

{fcs | symbol} period num {seconds | frames}

no {fcs | symbol} period num {seconds | frames}

default {fcs | symbol} period num {seconds | frames}

Parameters
  • fcs Inbound packets with Frame Check Sequence (FCS) error.
  • symbol Inbound packets with symbol error.
  • num The link monitoring period in frames or seconds. The frames value ranges from 1 to 4000000000. The seconds value ranges from 2 to 200 seconds. The default value is 2 seconds.
    • seconds The monitor errors per num seconds.
    • frames The monitor errors per num frames.
Related Commands

Example

These commands set the frames period type for the profile profile1 in the Link-error configuration mode for 300 frames.
switch(config)#monitor ethernet oam                        
switch(config-eoam)#profile profile1
switch(config-eoam-profile-profile1)#link-error
switch(config-eoam-profile-profile1-link-error)#symbol period 300 frames

phy link detection aggressive

The phy link detection aggressive command allows configuration of interfaces for aggressive link-up declaration (~50 ms) on those interfaces. no/default phy link detection aggressive configuration reverts to a more reliable link-up with at least a two-second delay. When the aggressive mode is not supported, the system generates an advisory message.

Command Mode

Global Configuration

Command Syntax

phy link detection aggressive

no phy link detection aggressive

default phy link detection aggressive

Examples

  • This command configures aggressive link detection.
    switch(config-if-Et1)#phy link detection aggressive
    switch(config-if-Et1)#
  • This command configures aggressive link detection but fails on a platform that does not support the feature.
    switch(config-if-Et1)#phy link detection aggressive
    detection     detection not supported on this hardware platform
    switch(config-if-Et1)#

poe disabled

Power over Ethernet (PoE) is enabled on all Ethernet ports by default on switches that support PoE. The poe disabled command disables PoE on the configuration-mode interface.

The no poe disabled and default poe disabled commands restore PoE on the interface by removing the corresponding poe disabled command from running-config.

Command Mode

Interface-Ethernet Configuration

Command Syntax

poe disabled

no poe disabled

default poe disabled

Example

These commands disable PoE on Ethernet interface 7.
switch(config)#interface ethernet 7
switch(config-if-Et7)#poe disabled
switch(config-if-Et7)#

poe legacy detect

IEEE-compliant Powered Devices (PDs) are recognized by a specific resistance signature to a test signal sent by the switch, but non-compliant (legacy or proprietary) PDs may use a capacitive signature instead. The poe legacy detect command causes the configuration-mode interface to attempt to use hardware detection for these non-compliant PoE devices and power them. By default, legacy PD detection is disabled, and legacy devices are not powered.

Note: Non IEEE-compliant PDs are not officially supported. Arista cannot guarantee compatibility with such devices, and they may not be detected even when legacy detection is enabled on the port they are connected to.

The no poe legacy detect and default poe legacy detect commands restore the default behavior by removing the corresponding poe legacy detect command from running-config.

Command Mode

Interface-Ethernet Configuration

Command Syntax

poe legacy detect

no poe legacy detect

default poe legacy detect

Example

These commands configure Ethernet interface 7 to attempt to detect and power capacitive PDs.
switch(config)#interface ethernet 7
switch(config-if-Et7)#poe legacy detect
switch(config-if-Et7)#

poe limit

Power over Ethernet (PoE) power output is limited by the hardware-negotiated power level and by the total power capacity of the switch. The poe limit command sets an additional maximum power output for the configuration-mode interface. The power limit represents the power output at the Ethernet port; actual power delivered to the PD will be lower due to power loss along the Ethernet cable.

Note: If a power limit is set by this command, Power Via MDI TLVs will not be sent from the interface. See Configuring LLDP for Power over Ethernet for details.

The no poe limit and default poe limit commands restore the default power limitation by removing the corresponding poe limit command from running-config.

Command Mode

Interface-Ethernet Configuration

Command Syntax

poe limit {class class_num | watt_num watts}

no poe limit

default poe limit

Parameters
  • class_num Specifies the power output limit by power class. Values range from 0-6 as follows:
    • Class 0 = 15.4 W
    • Class 1 = 4 W
    • Class 2 = 7 W
    • Class 3 = 15.4 W
    • Class 4 = 30 W
    • Class 5 = 45 W
    • Class 6 = 60 W
  • watt_num Specifies the power output limit in watts. Values range from 0-60. A value of 0 watts prevents the port from providing PoE power.
Examples
  • These commands limit nominal PoE power output on Ethernet interface 7 to 10 W.
    switch(config)#interface ethernet 7
    switch(config-if-Et7)#poe limit 10 watts
    switch(config-if-Et7)#
  • These commands limit nominal PoE power output on Ethernet interface 7 to 4 W.
    switch(config)#interface ethernet 7
    switch(config-if-Et7)#poe limit class 1
    switch(config-if-Et7)#

power budget

Power over Ethernet (PoE) budget is not set on all Ethernet ports by default on switches that support PoE. The power budget [n] watts command sets a limit of 'n' watts available for use by the ports on the switch. Otherwise, available power for PoE is limited to the sum of all power provided by the PSUs minus the power reserved for the chassis.

The no power budget restores the default state.

Command Mode

Interface-Ethernet Configuration

Command Syntax

power budget [n] watts

no power budget

Example

The following command sets the PoE power budget to 600W.
switch(config)#power budget 600 watts

power budget exceed action (warning | hold-down)

When the Power over Ethernet (PoE) ports exceeds the budgeted amount, the switch issues a warning and continues to provide additional power above the budgeted limit. The power budget exceed action hold-down command causes the switch to issue a warning and limit the power to the configured limit.

The no power budget restores the default state.

Command Mode

Interface-Ethernet Configuration

Command Syntax

power budget exceed action hold-down

no power budget

Example

The following commands set the PoE power budget to 600W and configure the switch to not exceed the limit.
switch(config)#power budget 600 watts
switch(config)#power budget exceed action hold-down

profile

The profile command creates an Ethernet operations, administration, and management (EOAM) profile in the EOAM configuration mode.

The no profile and default profile commands exit from the EOAM configuration mode.

Command Mode

EOAM Configuration

Command Syntax

profile profile_name

no profile profile_name

default profile profile_name

Parameter

profile_name The profile name that is specified.

Guidelines

Run the shutdown or no shutdown command to bring the port back to the normal state.

Example

These commands create an EOAM profile profile1 in the EOAM configuration mode.
switch(config)#monitor ethernet oam
switch(config-eoam)#profile profile1
switch(config-eoam-profile-profile1)#

qos scheduling

The qos scheduling command places the switch in the QoS scheduling mode under which the scheduling groups and scheduling policies are configured for shared shaper across multiple subinterfaces.

The no qos scheduling command removes the QoS scheduling configuration from the running-config.

Command Mode

QoS Scheduling Mode

Command Syntax

qos scheduling

no qos scheduling

Example

These commands create a scheduling policy with the desired shape rate and optional guaranteed bandwidth:
switch(config)#qos scheduling
switch(config-qos-scheduling)#scheduling policy P1
switch(config-qos-scheduling-policy-P1)#shape rate 75000000
switch(config-qos-scheduling-policy-P1)#bandwidth guaranteed 10000000

recovery-time

The recovery-time command configures the recovery timeout value for link fault signaling.

The no recovery-time command and the default recovery-timecommand removes the recovery timeout value specified for the chosen link error.

Command Mode

Link-error Configuration

Command Syntax

recovery-time value

no recovery-time value

default recovery-time value

Parameters

value Specifies the recovery timeout value for LFS. The value ranges from 20 to 200.

Related Commands

Example

These commands set the recovery time value of 40 for the profile profile1 in the Link-error configuration mode.
switch(config)#monitor ethernet oam
switch(config-eoam)#profile profile1                      
switch(config-eoam-profile-profile1)#link-error
switch(config-eoam-profile-profile1-link-error)#recovery-time 40

show hardware counter

The show hardware counter command displays counter events across time intervals.

Command Mode

EXEC

Command Syntax

show hardware counter

Example

This command displays counter events across all time intervals, which are currently more than one standard deviation apart from a given time interval.
switch(config-handler-eventHandler1-counters)#show hardware counter events
-----------------------------------------------------------------------------------------
Interval | Event Name  | Chip | First  | Last  | Count | Z-Score
 |  | Name | Occurrence  | Occurrence  |  | 
-----------------------------------------------------------------------------------------
5 Min  | MacCounters |  All | 2017-01-31 09:31:35 | 2017-01-31 09:44:32 |  5 | -6.9430
10 Min | MacCounters |  All | 2017-01-31 09:39:43 | 2017-01-31 09:44:32 |  3 | -4.8123
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switch(config-handler-eventHandler1-counters)#

show hardware port-group

The show hardware port-group command displays the status of DCS-7050Q-16 port-groups. Port groups contain one QSFP+ interface and a set of four SFP+ interfaces. In each port group, either the QSFP+ interface or the SFP+ interface set is enabled. The port groups are configured independent of each other.
  • Port group 1 contains interface 15 (QSFP+) and interfaces 17-20 (SFP+).
  • Port group 2 contains interface 16 (QSFP+) and interfaces 21-24 (SFP+).
Command Mode

EXEC

Command Syntax

show hardware port-group

Guidelines

The hardware port-group command is available on on DCS-7050Q-16 switches.

Example

This command displays the status of ports in the two port groups on a DCS-7050Q-16 switch.
switch#show hardware port-group

Portgroup: 1    Active Ports: Et15/1-4
Port            State
------------------------------------------
Ethernet17      ErrDisabled
Ethernet18      ErrDisabled
Ethernet19      ErrDisabled
Ethernet20      ErrDisabled
Ethernet15/1    Active
Ethernet15/2    Active
Ethernet15/3    Active
Ethernet15/4    Active

Portgroup: 2    Active Ports: Et16/1-4
Port            State
------------------------------------------
Ethernet16/1    Active
Ethernet16/2    Active
Ethernet16/3    Active
Ethernet16/4    Active
Ethernet21      ErrDisabled
Ethernet22      ErrDisabled
Ethernet23      ErrDisabled
Ethernet24      ErrDisabled
switch>

show interfaces counters bins

The show interfaces counters bins command displays packet counters, categorized by packet length, for the specified interfaces. Packet length counters that the command displays include:
  • 64 bytes
  • 65-127 bytes
  • 128-255 bytes
  • 256-511 bytes
  • 512-1023 bytes
  • 1024-1522 bytes
  • larger than 1522 bytes
Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] counters bins

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.
  • port-channel p_range Port-Channel Interface range specified by p_range.

Example

This command displays packet counter results for Ethernet interfaces 1 and Ethernet interfaces 2.
switch#show interfaces ethernet 1-2 counters bins
Input
Port                64 Byte      65-127 Byte     128-255 Byte     256-511 Byte
------------------------------------------------------------------------------
Et1                    2503         56681135          1045154          1029152
Et2                       8         50216275          1518179          1086297

Port          512-1023 Byte   1024-1522 Byte    1523-MAX Byte
-------------------------------------------------------------
Et1                  625825         17157823          8246822
Et2                  631173         27059077          5755101
switch>

show interfaces counters errors

The show interfaces counters errors command displays the error counters for the specified interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] counters errors

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.
  • port-channel p_range Port-Channel Interface range specified by p_range.

Display Values

The table displays the following counters for each listed interface:
  • FCS: Inbound packets with CRC error and proper size.
  • Align: Inbound packets with improper size (undersized or oversized).
  • Symbol: Inbound packets with symbol error and proper size.
  • Rx: Total inbound error packets.
  • Runts: Outbound packets that terminated early or dropped because of underflow.
  • Giants: Outbound packets that overflowed the receiver and were dropped.
  • Tx: Total outbound error packets.

Examples

This command displays the error packet counters on Ethernet interface 1 and Ethernet interface 2.
switch#show interfaces ethernet 1-2 counters errors
Port               FCS    Align   Symbol       Rx    Runts   Giants       Tx
Et1                  0        0        0        0        0        0        0
Et2                  0        0        0        0        0        0        0
switch>

show interfaces counters queue

The show interfaces counters queue command displays the queue drop counters for the specified interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] counters queue

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.
  • port-channel p_range Port-Channel Interface range specified by p_range.

Example

This command displays the queue drop counters for Ethernet interfaces 1 and Ethernet interfaces 2.
switch#show interfaces ethernet 1-2 counters queue
Port                  InDrops
Et1                       180
Et2                       169
switch>

show interfaces counters rates

The show interfaces counters rates command displays the received and transmitted packet rate counters for the specified interfaces. Counter rates provided include megabits per second (Mbps), kilopackets per second (Kpps) and utilization percentage.

All port rates are approximately calculated. Note that, when displaying the rate information of a port channel, the rate value of the port channel differs from the sum of the rates for the member ports. The discrepancy is likely to be larger for port channels with fewer ports except for port channels with single ports. The rate values of individual member ports are less inaccurate than the rate values of the port channel as a whole.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] counters rates

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.
  • port-channel p_range Port-Channel Interface range specified by p_range.
Related Commands

Example

This command displays rate counters for Ethernet interfaces 1 and Ethernet interfaces 2.
switch#show interfaces ethernet 1-2 counters rates
Port        Intvl   In Mbps      %  In Kpps  Out Mbps      % Out Kpps
Et1          0:05      53.3   0.5%        5      31.2   0.3%        2
Et2          0:05      43.3   0.4%        4       0.1   0.0%        0
switch#

show interfaces counters

The show interface counters command displays the Layer 3 ingress traffic count information. Run this command to view the traffic counts on a sub-interface or VLAN interface. The clear counters command resets the counters to zero. Counters displayed by the command include:
  • inbound bytes
  • inbound unicast packets
  • inbound multicast packets
  • inbound broadcast packets
  • outbound bytes
  • outbound unicast packets
  • outbound multicast packets
  • outbound broadcast packets
Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] counters [incoming]

Parameters
  • INTERFACE Interface type and numbers. Options include:
    • no parameter All interfaces.
    • ethernet e_range Ethernet interface range specified by e_range.
    • management m_range Management interface range specified by m_range.
    • port-channel p_range Port-Channel Interface range specified by p_range.
    • subinterface Displays the subinterface traffic counts.
    • vlan-interface Displays the VLAN-interface traffic counts.
  • incoming Displays the traffic count for the ingress port.
    Note: When no interface is specified, the output starts with ingress and egress counters section for regular interfaces, followed by section for the ingress L3 Interface counters.
Examples
  • This command displays byte and packet counters for Ethernet interfaces 1 and Ethernet interfaces 2
    switch#show interfaces ethernet 1-2 counters
    Port                 InOctets     InUcastPkts     InMcastPkts     InBcastPkts
    Et1               99002845169        79116358           75557            2275
    Et2               81289180585        76278345           86422              11
    
    Port                OutOctets    OutUcastPkts    OutMcastPkts    OutBcastPkts
    Et1                4347928323         6085482          356173            2276
    Et2                4512762190         5791718          110498              15
    switch>
  • This command displays the ingress traffic count on a VLAN interface vl12.
    switch#show interface vl12 counters incoming
    L3 Interface InOctets InUcastPkts InMcastPkts
    Vl12           3136          47           2

show interfaces flow-control

The show interfaces flow-control command displays administrative and operational flow control data for the specified interfaces. Administrative data is the parameter settings stored in running-config for the specified interface; the switch uses these settings to negotiate flow control with the peer switch. Operational data is the resolved flow control setting that controls the ports behavior.

Command Mode

EXEC

Command Syntax

show [INTERFACE] flow-control

Parameters
INTERFACE Interface type and number for which flow control data is displayed.
  • no parameter All interfaces.
  • ethernet e_range Ethernet interfaces in the specified range.
  • management m_range Management interfaces in the specified range.

Valid e_range and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

Example

This command shows the settings for Ethernet interfaces 1-10.
switch#show flow-control interface ethernet 1-10
Port       Send FlowControl  Receive FlowControl  RxPause       TxPause
           admin    oper     admin    oper
---------  -------- -------- -------- --------    ------------- -------------
Et1        off      off      off      off         0             0
Et2        off      off      off      off         0             0
Et3        off      off      off      off         0             0
Et4        off      off      off      off         0             0
Et5        off      off      off      off         0             0
Et6        off      off      off      off         0             0
Et7        off      off      off      off         0             0
Et8        off      off      off      off         0             0
Et9        off      off      off      off         0             0
Et10       off      off      off      off         0             0
switch#

show interfaces hardware default

The show interfaces hardware default command displays the static interface capability information of the specified interfaces. This command displays information related to the speed, auto-negotiation, error correction, and modulation capabilities (when applicable) of a system’s ports. The command also provides information displayed by the show interfaces hardware command, such as model number, interface type, duplex mode, and flow control settings of the specific interface. Compared to the show interfaces hardware command, this command accounts for the capabilities of the system architecture only, and does not consider the capabilities of a transceiver.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] hardware default

Parameters

INTERFACE     Interface type and numbers. Options include:
  • no parameter     all interfaces.
  • ethernet e_range     Ethernet interface range specified by e_range.
  • management m_range     Management interface range specified by m_range.

Valid e_range and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

Examples
  • This command displays the static interface capability information at the default level.
    switch>show interfaces hardware default
    Ethernet1
      Model:     DCS-7020TR-48
      Type:      1000BASE-T
      Speed/Duplex: 100M/full,1G/full
      Flowcontrol:  rx-(off,on,desired),tx-(off)
      Autoneg CL28: 100M/full,1G/full
      Autoneg CL37: 1G/full
    switch>
  • This command displays the static interface capability information for Ethernet interface 4/1/1
    switch>show interfaces ethernet 4/1/1 hardware default
    Ethernet4/1/1
      Model:     7500R2AK-36CQ-LC
      Type:      40GBASE-CR4
      Speed/Duplex: 1G/full,10G/full,25G/full,40G/full,50G/full,100G/full
      Flowcontrol:  rx-(off,on,desired),tx-(off)
      Autoneg CL28: 1G/full,10G/full
      Autoneg CL73:
    IEEE:           25G/full,40G/full,100G/full
    Consortium: 25G/full,50G/full
      Error Correction:
    Reed-Solomon: 25G,50G,100G
    Fire-code:   25G,50G

show interfaces hardware

The show interfaces hardware command displays the model number, interface type, duplex mode, and flow control settings of the specified interfaces. The capabilities command is available on Ethernet and management interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] hardware

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.

Valid e_range and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

Example

This command displays the model number, interface type, duplex mode, and flow control settings for Ethernet interface 2 and Ethernet interface 18.
switch#show interfaces ethernet 2,18 hardware
Ethernet2
  Model:        DCS-7150S-64-CL
  Type:         10GBASE-CR
  Speed/Duplex: 10G/full,40G/full,auto
  Flowcontrol:  rx-(off,on,desired),tx-(off,on,desired)
Ethernet18
  Model:        DCS-7150S-64-CL
  Type:         10GBASE-SR
  Speed/Duplex: 10G/full
  Flowcontrol:  rx-(off,on),tx-(off,on)
switch#

show interfaces interactions

The show interfaces interactions command aims to provide users a resource that explains various relationships between ethernet interfaces. It describes interactions in which a configuration on an interface causes another set of interfaces to become inactive or have reduced capabilities. Examples include a primary interface consuming subordinate interfaces to service a four-lane speed or platform restrictions that require four interfaces of a port to operate at the same speed.

Command Mode

EXEC

Command Syntax

show interfaces [intf] interactions

Parameters

intf Hardware Ethernet interface. You can restrict the output by interface name.

Examples

The information is displayed as a text dump. Each section of information appears on a separate indentation level. The first indent level is the interface, the second is the desired configuration, and the third is the list of interactions. For example, the output below describes the following:
  1. If the user wants to configure Ethernet2/1 for 40G, Ethernet2/2-4 becomes inactive.
  2. If the user wants to configure Ethernet2/1 for 10G, it does not affect other interfaces.
    switch#show interface et2/1 interactions
    * = includes less than 10G speeds that the interface is capable of
    
    Ethernet2/1:
      For speed 40G
        Ethernet2/2-4 become inactive
      For speed 10G*
        No interactions with other interfaces

The asterisk next to the 10G entry indicates that these same interactions apply for speeds lower than 10G that the interface supports. In other words, if this interface also supported 1G or 100M, the configuration does not affect other interfaces.

Types of Interactions

No Interactions

If there are no interactions for the given interfaces, the display shows No interfaces interactions. Depending on what configurations actually have interactions, the line could appear at a number of different indentation levels. The rules are:
  1. If all specified interfaces have no interactions, print at the first indentation level.
  2. If only some specified interfaces have no interactions and those interfaces have no interactions at any speeds, print at the second indentation level for those interfaces.
  3. If only some specified interfaces have no interactions and those interfaces only have interactions at some speeds, print at the third indentation level for those speeds.
    switch#show int et1,2 interactions
    No interfaces interactions
    
    switch#show int et1,2,5/1 interactions
    * = includes less than 10G speeds that the interface is capable of
    
    Ethernet1
      No interactions with other interfaces
    Ethernet2
      No interactions with other interfaces
    Ethernet5/1
      For speed 40G
        Ethernet5/2-4 become inactive
      For speed 10G*
        No interactions with other interfaces

Inactive Interfaces

If a configuration on an interface causes other interfaces to become inactive, a message similar to the ones bolded below appear. A common example of this is configuring a QSFP28 port for 100G, which results in the /2,/3, and /4 interfaces becoming inactive. Note that display information for inactive interfaces are included in the specified range, ignoring whether or not inactive interfaces are exposed.
switch#show interfaces et11/1,11/3 interactions
* = includes less than 10G speeds that the interface is capable of

Ethernet11/1:
  For speed 100G-4
    Ethernet11/2-4 become inactive
  For speed 50G-2
    Ethernet11/2,11/4 become inactive
    Ethernet11/3 is limited to 50G-2
  For speed 40G
    Ethernet11/2-4 become inactive
  For speed 25G
    Ethernet11/2-4 are limited to 25G
  For speed 10G*
    Ethernet11/2-4 are limited to 10G*
Ethernet11/3:
  For speed 50G-2
    Ethernet11/4 becomes inactive
    Primary interface Ethernet11/1 must be operating at 50G-2
  For speed 25G
    Primary interface Ethernet11/1 must be operating at 25G
  For speed 10G*
    Primary interface Ethernet11/1 must be operating at 10G*

Required Primary Interface Configuration

Some interface configurations require a particular primary interface configuration to function. These interactions are captured with messages similar to the ones bolded below.
switch#show interfaces et11/1,11/3 interactions
* = includes less than 10G speeds that the interface is capable of

Ethernet11/1:
  For speed 100G-4
    Ethernet11/2-4 become inactive
  For speed 50G-2
    Ethernet11/2,11/4 become inactive
    Ethernet11/3 is limited to 50G-2
  For speed 40G
    Ethernet11/2-4 become inactive
  For speed 25G
    Ethernet11/2-4 are limited to 25G
  For speed 10G*
    Ethernet11/2-4 are limited to 10G*
Ethernet11/3:
  For speed 50G-2
    Ethernet11/4 becomes inactive
    Primary interface Ethernet11/1 must be operating at 50G-2
  For speed 25G
    Primary interface Ethernet11/1 must be operating at 25G
  For speed 10G*
    Primary interface Ethernet11/1 must be operating at 10G*

Hardware Speed-Group Requirements

Some interface configurations require an additional speed-group configuration in order to operate correctly.If speed-group configurations are required, there will be a message displayed similar to the ones bolded below.

Note: A single speed-group may include more than one compatibility setting. Using the example below as reference, Ethernet1/1 at 100G-4 and Ethernet2/1 at 40G are compatible configurations as long as hardware speed-group 1 can include 50g and 10g rates simultaneously.
switch#show interfaces et1/1,2/1 interactions
* = includes less than 10G speeds that the interface is capable of

Ethernet1/1:
  For speed 100G-4
    Ethernet1/2-4 become inactive
    Hardware speed-group 1 must include 50g
  For speed 40G
    Ethernet1/2-4 become inactive
    Hardware speed-group 1 must include 10g
  For speed 25G
    Ethernet2/1,2/3 become inactive
    Ethernet1/3 is limited to 25G/10G
    Hardware speed-group 1 must include 25g
  For speed 10G
    Ethernet2/1,2/3 become inactive
    Ethernet1/3 is limited to 25G/10G
    Hardware speed-group 1 must include 10g
Ethernet2/1:
  For speed 100G-4
    Ethernet2/3 becomes inactive
    Ethernet1/1 must be operating at 100G-4/50G-2/40G
    Hardware speed-group 1 must include 50g
  For speed 40G
    Ethernet2/3 becomes inactive
    Ethernet1/1 must be operating at 100G-4/50G-2/40G
    Hardware speed-group 1 must include 10g

Compatible Parent Interface Configuration

The parent interface may be configured for any one of the list of compatible rates. Additionally, more than one interface may be required to be configured at a compatible rate. These interactions are captured with messages similar to the ones bolded below

Note: Using the example below as a reference, suppose that Ethernet1/1 is configured for 100G-4 and that the goal is to configure Ethernet1/8 to 50G-1. According to the display, Ethernet1/1 is configured for a compatible rate. That said, in order for Ethernet1/1 to operate at 100G-4, hardware speed-group 1 must be configured to include the 25g compatibility setting. Additionally, hardware speed-group 1 must also include the 50g compatibility setting to enable Ethernet1/8 to operate at 50G-1. Interactions on Ethernet1/5 and Ethernet1/7 must be considered as well (omitted from the example for brevity).
switch#show interfaces et1/1,1/8 interactions
* = includes less than 10G speeds that the interface is capable of

Ethernet1/1:
  Ethernet1/1-4/8 share 18 interface hardware resources
  For speed 400G-8
    Ethernet1/2-8 become inactive
    Hardware speed-group 1 must include 50g
  For speed 200G-4
    Ethernet1/2-4 become inactive
    Hardware speed-group 1 must include 50g
  For speed 100G-2
    Ethernet1/2 becomes inactive
    Hardware speed-group 1 must include 50g
  For speed 100G-4
    Ethernet1/2-4 become inactive
    Hardware speed-group 1 must include 25g
  For speed 50G-1
    Hardware speed-group 1 must include 50g
  For speed 50G-2
    Ethernet1/2 becomes inactive
    Hardware speed-group 1 must include 25g
  For speed 40G
    Ethernet1/2-4 become inactive
    Hardware speed-group 1 must include 10g
  For speed 25G
    Hardware speed-group 1 must include 25g
  For speed 10G
    Hardware speed-group 1 must include 10g
Ethernet1/8:
  For speed 50G-1
    Ethernet1/1 must be operating at 200G-4/100G-2/100G-4/50G-1/50G-2/40G/25G/10G
    Ethernet1/5 must be operating at 100G-2/50G-1/50G-2/25G/10G
    Ethernet1/7 must be operating at 50G-1/25G/10G
    Hardware speed-group 1 must include 50g

Speed-limited Interfaces

Some interface configurations limit at what other interfaces can operate. If such limitations occur, a message displayssimilar to the ones bolded below.
switch#show interfaces et11/1,11/3 interactions
* = includes less than 10G speeds that the interface is capable of

Ethernet11/1:
  For speed 100G-4
    Ethernet11/2-4 become inactive
  For speed 50G-2
    Ethernet11/2,11/4 become inactive
    Ethernet11/3 is limited to 50G-2
  For speed 40G
    Ethernet11/2-4 become inactive
  For speed 25G
    Ethernet11/2-4 are limited to 25G
  For speed 10G*
    Ethernet11/2-4 are limited to 10G*
Ethernet11/3:
  For speed 50G-2
    Ethernet11/4 becomes inactive
    Primary interface Ethernet11/1 must be operating at 50G-2
  For speed 25G
    Primary interface Ethernet11/1 must be operating at 25G
  For speed 10G*
    Primary interface Ethernet11/1 must be operating at 10G*

Interfaces Sharing Logical Ports

Some interface ranges share logical port resources. If an interface shares logical ports with other interfaces, a message displays similar to the ones bolded below.

Note: There must be logical ports available for an interface to become operational. Not all interfaces sharing logical ports can be operational simultaneously. Inactive interfaces do not consume a resource.
switch#show interfaces et1/1,4/1 interactions
* = includes less than 10G speeds that the interface is capable of

Ethernet1/1:
  Ethernet1/1-4/8 share 18 interface hardware resources
  For speed 400G-8
    ...
Ethernet4/1:
  Ethernet1/1-4/8 share 18 interface hardware resources
  For speed 400G-8
    ...

show interfaces negotiation

The show interfaces negotiation command displays the speed, duplex, and flow control auto-negotiation status for the specified interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] negotiation [INFO_LEVEL]

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter Display information for all interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.

    Valid e_range and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

  • INFO_LEVEL Amount of information that is displayed. Options include:
    • no parameter Displays status and negotiated setting of local ports.
    • detail Displays status and negotiated settings of local ports and their peers.
Examples
  • This command displays the negotiated status of management 1 and management 2 interfaces.
    switch#show interface management 1-2 negotiation
    Port       Autoneg            Negotiated Settings
               Status   Speed     Duplex    Rx Pause  Tx Pause
    ---------  -------  --------  --------  --------  --------
    Ma1        success  100M      full      off       off
    Ma2        success  auto      auto      off       off
    switch>
  • This command displays the negotiated status of management 1 interface and its peer interface.
    switch#show interface management 1 negotiation detail
    Management1 :
    
    Auto-Negotiation Mode     10/100/1000 BASE-T (IEEE Clause 28)
    Auto-Negotiation Status   Success
    
      Advertisements       Speed           Duplex     Pause
                           --------------- ---------- --------------------
          Local            10M/100M/1G     half/full  Disabled
          Link Partner     None            None       None
    
      Resolution           100Mb/s         full       Rx=off,Tx=off
    switch>

show interfaces phy

The show interfaces phy command displays physical layer characteristics for the specified interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] phy [INFO_LEVEL]

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interfaces in specified range.

    Valid e_range formats include number, number range, or comma-delimited list of numbers and ranges.

  • INFO_LEVEL Amount of information that is displayed. Options include:
    • no parameter Command displays table that summarizes PHY data.
    • detail Command displays data block for each specified interface.
Examples
  • This command summarizes PHY information for Ethernet interfaces 1-5.
    switch#show interfaces ethernet 1-5 phy
    Key:
       U    = Link up
       D    = Link down
       R    = RX Fault
       T    = TX Fault
       B    = High BER
       L    = No Block Lock
       A    = No XAUI Lane Alignment
       0123 = No XAUI lane sync in lane N
    
                                      State    Reset
    Port           PHY state        Changes    Count PMA/PMD PCS   XAUI
    -------------- --------------- -------- -------- ------- ----- --------
    Ethernet1      linkUp             14518     1750 U..     U.... U.......
    Ethernet2      linkUp             13944     1704 U..     U.... U.......
    Ethernet3      linkUp             13994     1694 U..     U.... U.......
    Ethernet4      linkUp             13721     1604 U..     U.... U.......
    Ethernet5      detectingXcvr          3        1               D..A0123
    switch#
  • This command displays detailed PHY information for Ethernet interface 1.
    switch#show interfaces ethernet 1 phy detail
    Current System Time: Mon Dec  5 11:32:57 2011
    Ethernet1
                                  Current State     Changes            Last Change
      PHY state                   linkUp              14523            0:02:01 ago
      HW resets                                        1751            0:02:07 ago
      Transceiver                 10GBASE-SRL          1704            0:02:06 ago
      Transceiver SN              C743UCZUD
      Oper speed                  10Gbps
      Interrupt Count                                 71142
      Diags mode                  normalOperation
      Model                       ael2005c
      Active uC image             microInit_mdio_SR_AEL2005C_28
      Loopback                    none
      PMA/PMD RX signal detect    ok                  11497            0:37:24 ago
      PMA/PMD RX link status      up                  11756            0:37:24 ago
      PMA/PMD RX fault            ok                  11756            0:37:24 ago
      PMA/PMD TX fault            ok                      0                  never
      PCS RX link status          up                   9859            0:02:03 ago
      PCS RX fault                ok                   9832            0:02:03 ago
      PCS TX fault                ok                    330            0:27:44 ago
      PCS block lock              ok                   9827            0:02:03 ago
      PCS high BER                ok                   8455            0:02:05 ago
      PCS err blocks              255                                  0:02:03 ago
      PCS BER                     16                  50092            0:02:05 ago
      XFI/XAUI TX link status     up                   1282            0:27:44 ago
      XFI/XAUI RX fault           ok                    585            0:27:44 ago
      XFI/XAUI TX fault           ok                   2142            0:02:05 ago
      XFI/XAUI alignment status   ok                   2929            0:02:05 ago
      XAUI lane 0-3 sync          (0123) = 1111        2932            0:02:05 ago
      XAUI sync w/o align HWM     0                                          never
      XAUI sync w/o align max OK  5
      XAUI excess sync w/o align  0                                          never
      Xcvr EEPROM read timeout                           46    4 days, 6:33:45 ago
      Spurious xcvr detection                             0                  never
      DOM control/status fail                             0
      I2C snoop reset             0
      I2C snoop reset (xcvr)      0
      Margin count                5                last > 0            0:00:00 ago
      EDC resets                  1                                    0:02:03 ago
      EDC FFE0 - FFE11            -4 -5 57 -6 -6 -2 1 0 -2 -1 1 -1
      EDC FBE1 - FBE4             6 -1 5 -1
      EDC TFBE1 - TFBE4           1 2 1 2
      EDC VGA1, VGA3              12 115
      TX path attenuation         3.0 dB
      TX preemphasis              (0,63,4) (pre,main,post)
    switch#

show interfaces status errdisabled

The show interfaces status errdisabled command displays interfaces that are in errdisabled state, including their link status and errdisable cause.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] status errdisabled

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter Display information for all interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.
  • port-channel p_range Port-Channel Interface range specified by p_range.

    Valid e_range and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

Example

This command displays the error-disabled ports.
switch#show interfaces status errdisabled

Port    Name           Status        Reason
------- -------------- ------------- ------------------
Et49/2                 errdisabled   multi-lane-intf
Et49/3                 errdisabled   multi-lane-intf
Et49/4                 errdisabled   multi-lane-intf
switch>

show interfaces status

The show interfaces status command displays the interface name, link status, vlan, duplex, speed, and type of the specified interfaces. When the command includes a link status, the results are filtered to display only interfaces whose link status match the specified type.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE]status [STATUS_TYPE]

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All existing interfaces.
  • ethernet e_range Ethernet interfaces in the specified range.
  • management m_range Management interfaces in the specified range.
  • port-channel p_range All existing port-channel interfaces in the specified range.

    Valid e_range, m_range, and p_range formats include number, number range, or comma-delimited list of numbers and ranges.

  • STATUS_TYP Einterface status upon which the command filters output. Options include:
    • no parameter Command does not filter on interface status.
    • connected Interfaces connected to another port.
    • notconnect Unconnected interfaces that are capable of connecting to another port.
    • disabled Interfaces that have been powered down or disabled.
    • sub-interfaces L3 subinterfaces configured on the switch.

      Command may include multiple status types (connected, notconnect, disabled), which can be placed in any order.

Examples
  • This command displays the status of Ethernet interfaces 1-5.
    switch#show interfaces ethernet 1-5 status
    Port      Name              Status       Vlan        Duplex  Speed Type
    Et1                         connected    1             full    10G 10GBASE-SRL
    Et2                         connected    1             full    10G 10GBASE-SRL
    Et3                         connected    1             full    10G 10GBASE-SRL
    Et4                         connected    1             full    10G 10GBASE-SRL
    Et5                         notconnect   1             full    10G Not Present
    switch>
  • This command displays status information for all subinterfaces configured on the switch.
    switch#show interfaces status sub-interfaces
    Port       Name    Status       Vlan     Duplex Speed  Type                Flags
    Et1.1              connect       101      full   10G   dot1q-encapsulation
    Et1.2              connect       102      full   10G   dot1q-encapsulation
    Et1.3              connect       103      full   10G   dot1q-encapsulation
    Et1.4              connect       103      full   10G   dot1q-encapsulation
    switch>

show interface transceiver dom

The show interface [<intf>] transceiver dom command displays the most important current performance data on the media (line) side.

Example
switch#show interface Ethernet11/1 transceiver dom
Ch: Channel, N/A: not applicable, TX: transmit, RX: receive
mA: milliamperes, dBm: decibels (milliwatts), C: Celsius, V: Volts

Port 11
Last update: 0:00:05 ago
                                             Value
                                        ----------------
   Case temperature                         66.59 C
   Voltage                                   3.26 V
   TX power                                -10.23 dBm
   RX total power                          -11.61 dBm
   RX channel power                        -11.94 dBm
   Pre-FEC BER                           1.82e-03 
   Post-FEC errored frames ratio         0.00e+00 
   Chromatic dispersion (short link)         0.00 ps/nm
   Chromatic dispersion (long link)          0.00 ps/nm
   Differential group delay                  9.31 ps
   SOPMD                                     0.00 ps^2
   Polarization dependent loss               0.40 dB
   Received OSNR estimate                   35.10 dB
   Received ESNR estimate                   17.50 dB
   Carrier frequency offset                  0.00 MHz
   Error vector magnitude                  100.00 %
   SOP rate of change                        0.00 krad/s
   Laser temperature                        59.54 C
   Laser frequency                         193100.00 GHz
  • BER: Bit Error Rate
  • FEC: Forward Error Correction
  • OSNR: Optical Signal to Noise Ratio
  • ESNR: Electrical Signal to Noise Ratio
  • SOP: State of Polarization
  • SOPMD: State of Polarization Mode Dispersion

show interface transceiver eeprom

The show interface [<intf>] transceiver eeprom command displays the parsed capabilities.

Example

For 400GBASE-ZR, parsing of frequency tuning, power tuning ( page 04h ) and VDM configuration pages (20h-23h) is added.
switch#show interface Ethernet15/1 transceiver eeprom
Ethernet15 EEPROM:
...
  Frequency tuning support (04h:128-129):
    Grid spacing capabilities (04h:128):
      100 GHz grid supported (04h:128): true
      12.5 GHz grid supported (04h:128): false
      25 GHz grid supported (04h:128): false
      3.125 GHz grid supported (04h:128): false
      33 GHz grid supported (04h:128): false
      50 GHz grid supported (04h:128): false
      6.25 GHz grid supported (04h:128): false
      75 GHz grid supported (04h:128): true
    Tunable wavelength (04h:128): true
    Fine tuning support (04h:129): false
  Supported channel boundaries (04h:130-161):
    100 GHz grid (04h:150-153):
      Lowest channel (04h:150-151): -18
      Lowest frequency (04h:150-151): 191300000 MHz
      Highest channel (04h:152-153): 30
      Highest frequency (04h:152-153): 196100000 MHz
    75 GHz grid (04h:158-161):
      Lowest channel (04h:158-159): -72
      Lowest frequency (04h:158-159): 191300000 MHz
      Highest channel (04h:160-161): 120
      Highest frequency (04h:160-161): 196100000 MHz
  Programmable output power advertisement (04h:196-201):
    Lane programmable output power supported (04h:196): false
  VDM configuration (20h:128-255;21h:128-255):
    VDM group 1 (20h:128-255):
      Parameter 1 (20h:128-129):
        Lane (20h:128): 0
        Threshold ID (20h:128): 0
        Parameter type (20h:129): Laser temperature
      Parameter 3 (20h:132-133):
        Lane (20h:132): 0
        Threshold ID (20h:132): 2
        Parameter type (20h:133): eSNR host input
      Parameter 4 (20h:134-135):
        Lane (20h:134): 1
        Threshold ID (20h:134): 2
        Parameter type (20h:135): eSNR host input
      Parameter 5 (20h:136-137):
        Lane (20h:136): 2
        Threshold ID (20h:136): 2
        Parameter type (20h:137): eSNR host input
...
       Parameter 84 (21h:166-167):
        Lane (21h:166): 0
        Threshold ID (21h:166): 14
        Parameter type (21h:167): MER
  Number of VDM groups supported (2Fh:128): 2

show interfaces transceiver channels

The show interfaces transceiver channels command displays current wavelength/frequency settings for the specified channels.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE e_range] transceiver channels

Parameters
INTERFACE Interface type and port numbers.
  • ethernet e_range Ethernet interface range specified by e_range.

Example

This command displays the supported wave lengths/frequencies and their corresponding channel numbers on Ethernet interface 4 to slot 3 through 4.
switch(config-as-if-Et4/1/3)#show interfaces ethernet 4/3/4 transceiver 
channels
Name: Et4/3/4
100GHz- 50GHz-
Wavelength Frequency spacing spacing
(nm) (GHz) Channel Channel
---------- --------- ------- -------
1567.95 191,200 1 1
1567.54 191,250 2
1567.13 191,300 2 3
1566.72 191,350 4
....
1529.16 196,050 98
1528.77 196,100 50 99
1528.38 196,150 100
switch(config-as-if-Et4/1/3)#

show interfaces transceiver hardware

The show interfaces transceiver hardware command displays current wavelength/frequency settings for the specified transceiver interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] ethernet e_range transceiver hardware

Parameters
INTERFACE Interface type and port numbers.
  • ethernet e_range Ethernet interface range specified by e_range.

Example

This command displays the current wavelength/frequency settings on Ethernet interface 4 to slot 3 through 4.
switch(config-as-if-Et4/1/3)#show interfaces ethernet 4 / 3 / 4 transceiver hardware
Name: Et4/3/4
Media Type: 10GBASE-DWDM
Configured Channel : 39
Configured Grid (GHz) : 50
Computed Frequency (GHz) : 193,100
Computed Wavelength (nm) : 1552.52
Operational Channel : 39 (Default)
Operational Grid (GHz) : 50 (Default)
Operational Frequency (GHz): 193,100
Operational Wavelength (nm): 1552.52
switch(config-as-if-Et4/1/3)#

show interfaces transceiver properties

The show interfaces transceiver properties command displays configuration information for the specified interfaces. Information provided by the command includes the media type, interface speed-duplex settings, speed-duplex operating state.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] transceiver properties

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter Display information for all interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.

    Valid e_range and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

Example

This command displays the media type, speed, and duplex properties for Ethernet interfaces 1-3.
switch#show interfaces ethernet 1-3 transceiver properties
Name : Et1
Administrative Speed: 10G
Administrative Duplex: full
Operational Speed: 10G (forced)
Operational Duplex: full (forced)
Media Type: 10GBASE-SRL

Name : Et2
Administrative Speed: 10G
Administrative Duplex: full
Operational Speed: 10G (forced)
Operational Duplex: full (forced)
Media Type: 10GBASE-SRL

Name : Et3
Administrative Speed: 10G
Administrative Duplex: full
Operational Speed: 10G (forced)
Operational Duplex: full (forced)
Media Type: 10GBASE-SRL

switch>

show interfaces transceiver

The show interfaces transceiver command displays operational transceiver data for the specified interfaces.

Command Mode

EXEC

Command Syntax

show interfaces [INTERFACE] transceiver [DATA_FORMAT]

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter All interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.
  • management m_range Management interface range specified by m_range.

    Valid e_range, and m_range formats include number, number range, or comma-delimited list of numbers and ranges.

  • DATA_FORMAT format used to display the data. Options include:
    • no parameter table entries separated by tabs.
    • csv table entries separated by commas.
Related Commands
show interfaces transceiver properties

Example

This command displays transceiver data on Ethernet interfaces 1 through Ethernet interfaces 4.
switch#show interfaces ethernet 1-4 transceiver
If device is externally calibrated, only calibrated values are printed.
N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
                             Bias      Optical   Optical
        Temp       Voltage   Current   Tx Power  Rx Power  Last Update
Port    (Celsius)  (Volts)   (mA)      (dBm)     (dBm)     (Date Time)
-----   ---------  --------  --------  --------  --------  -------------------
Et1      34.17      3.30      6.75     -2.41     -2.83     2011-12-02 16:18:48
Et2      35.08      3.30      6.75     -2.23     -2.06     2011-12-02 16:18:42
Et3      36.72      3.30      7.20     -2.02     -2.14     2011-12-02 16:18:49
Et4      35.91      3.30      6.92     -2.20     -2.23     2011-12-02 16:18:45
switch#

show monitor ethernet oam profile

The show monitor ethernet oam profile command displays configuration information for the specified ethernet OAM profile name or ?the summary information of all configured profile names.

Command Mode

EXEC

Command Syntax

show monitor ethernet oam profile [name | summary]

Parameters
  • name     The EOAM profile name.
  • summary     The EOAM summary of all profiles that are configured.
Examples
  • This command displays the OAM profile configuration information for the specific profile name.

    switch#show monitor ethernet oam profile[name] 
    
             Ethernet OAM Profile : p
    
             Error Type : symbol
    
                               Threshold  :    20  frames
                               Action     :           log
                               Period     :    20 seconds
    
             Error Type : fcs
                               Threshold  :    10  frames
                               Action     :     linkfault
                               Period     :   100  frame
    
             Recovery Timeout : 20
  • This command displays the OAM profile configuration summary for all profiles configured.

    switch#show monitor ethernet oam profile [name] summary
    
             Eoam Profile : p 
                Configured on:  Et3/1-4,5

show platform fm6000 agileport map

The show platform fm6000 agileport map command displays the list of Ethernet interfaces that are combinable to form a higher speed port.

Command Mode

Privileged EXEC

Command Syntax

show platform fm6000 agileport map

Example

These commands displays the agile port map for the switch, then configures Ethernet interface 13 as a 40G port, subsuming Ethernet interfaces 15, 17 and 19.
switch#show platform fm6000 agileport map

-----------------------------------------------------------------
Agile Ports       |        Interfaces subsumed in 40G link
-----------------------------------------------------------------
Ethernet1         |  Ethernet3      Ethernet5      Ethernet7
Ethernet2         |  Ethernet4      Ethernet6      Ethernet8
Ethernet13        |  Ethernet15     Ethernet17     Ethernet19
Ethernet14        |  Ethernet16     Ethernet18     Ethernet20

switch#config
switch(config)#interface ethernet 13
switch(config-if-Et13)#speed 40gfull

  WARNING!  Executing this command will cause the forwarding agent
            to be restarted. All interfaces will briefly drop links
            and forwarding on all interfaces will momentarily stop.


            Do you wish to proceed with this command? [y/N]

Ethernet13 configured for 40G.
Ethernet15, Ethernet17 and Ethernet19 are now subsumed.
switch(config-if-Et13)#

show platform trident flexcounters

Use the show platform trident flexcounters command to display the L3 interfaces when the corresponding hardware counter feature is enabled.

Command Mode

Privileged EXEC

Command Syntax

show platform trident flexcounters [vni [egress summary | ingress summary]]|[[vtep [decap summary | encap summary]]

Parameters
  • vni Displays the VNI feature state.
    • egress summary Displays the egress direction flexcounters summary.
    • ingress summary Displays the ingress direction flexcounters summary.
  • vtep Displays the VTEP feature state
    • decap summary Displays the decap direction flexcounter summary.
    • encap summary Displays the encap direction flexcounter summary.
Examples
  • The following example displays the headings for the show platform tridant flexcounters vni egress summary show command.

    switch#show platform tridant flexcounters vni egress summary
    VNI      EgrVfiIndex    PoolId    OffsetMode    BaseCounterIndex
    -----------------------------------------------------------------
  • The following example displays the headings for the show platform trident flexcounters vni ingress summary show command.

    switch#show platform trident flexcounters vni ingress summary
    VNI      VfiIndex    PoolId    OffsetMode    BaseCounterIndex
    --------------------------------------------------------------
  • The following example displays the headings for the show platform trident flexcounters vtep decap summary show command.

    switch#show platform trident flexcounters vtep decap summary
    VTEP      SvpIndex    PoolId    OffsetMode    BaseCounterIndex
    ---------------------------------------------------------------
  • The following example displays the headings for the show platform trident flexcounters vtep encap summaryshow command.

    switch#show platform trident flexcounters vtep encap summary
    VTEP      DvpIndex    PoolId    OffsetMode    BaseCounterIndex
    ---------------------------------------------------------------

show platform trident flexcounters l3intf

Use the show platform trident flexcounters l3intf command to display the subinterface, SVI, and GRE tunnel interface features.

Command Mode

EXEC

Command Syntax

show platform trident flexcounters l3intf [[in | out] [summary | values]]

Parameters
  • in summary Displays the details of the hardware resources allocated to the ingress subinterface, SVI, and GRE Tunnel Interface features.
  • out summary Displays the details of the hardware resources allocated to the egress subinterface, SVI, and GRE Tunnel Interface features.
  • in values Displays the counters in the counter and snapshot table for the ingress subinterface, SVI, and GRE Tunnel Inteface features.
  • out values Displays the counters in the counter and snapshot table for the egress subinterface, SVI, and GRE Tunnel Interface features.
Note: The counter values in this show command output are not reset by the clear counters command.
Examples
  • Use the show platform trident flexcounters l3intf in summary command to display the details of the hardware resources allocated to the ingress subinterface, SVI, and GRE Tunnel Interface features.

    switch#show platform trident flexcounters l3intf in summary
    L3intf     CounterIndex    PoolId    OffsetMode   BaseCounterIndex
    -------------------------------------------------------------------
  • Use the show platform trident flexcounters l3intf out summary command to display the details of the hardware resources allocated to the egress subinterface, SVI, and GRE Tunnel Interface features.

    switch#show platform trident flexcounters l3intf out summary
    L3intf     CounterIndex    PoolId    OffsetMode   BaseCounterIndex
    -------------------------------------------------------------------
  • Use the show platform trident flexcounters l3intf in values command to display the counters in the counter and snapshot table for the ingress subinterface, SVI, and GRE Tunnel Interface features.

    switch#show platform trident flexcounters l3intf in values
    L3intf   Offser Bytes(cntTbl)    Bytes(snapTbl)    Pkts(cntTbl)    Pkts(snapTbl)
    ---------------------------------------------------------------------------------
  • Use the show platform trident flexcounters l3intf out values command to display the counters in the counter and snapshot table for the egress subinterface, SVI, and GRE Tunnel Interface features.

    switch#show platform trident flexcounters l3intf out values
    
    L3intf   Offser Bytes(cntTbl)    Bytes(snapTbl)    Pkts(cntTbl)    Pkts(snapTbl)
    --------------------------------------------------------------------------------

show poe

The show poe command displays PoE information for a specified port range or for all ports.

Command Mode

Privileged EXEC

Command Syntax

show poe [INTERFACE]

Parameters
INTERFACE Interface type and numbers. Options include:
  • no parameter Display information for all interfaces.
  • ethernet e_range Ethernet interface range specified by e_range.

Example

This command displays PoE information for Ethernet interface 46.
switch(config)#show poe interface ethernet 46

Port Enabled Enabled Limit  Power   State   Class  Power Current Voltage Temperature
---- ------- ------- ------ ------- ------- ------ ----- ------- ------- -----------
46      True    True 15.40W  15.40W powered class0 1.40W 27.00mA  55.04V      41.25C
switch(config-if-Et7)#

show qos scheduling

The show qos scheduling command displays the QoS configuration on one or more scheduling groups. Both group name and parent interface name are optional, in which case all groups will be displayed.

Command Mode

Privileged EXEC

Command Syntax

show qos scheduling Options

Parameter

Options include the Group, Interface or the Hierarchy.

Example

This command displays the QoS configuration for scheduling group G1 of interface Ethernet1.
switch#show qos scheduling group G1 Ethernet1
Interface: Et1
Scheduling Group Name: G1
Bandwidth: 10.1 / 10.0 (Gbps)
Shape Rate: 75.2 / 75.0 (Gbps)

Member         Bandwidth        Shape Rate
                (units)           (units)
------       -------------  ------------------
Et1.1           - /  - (-)  50.1 / 50.0 (Gbps)
Et1.2           - /  - (-)  30.1 / 30.0 (Gbps)

show route counters

Use the show route [ipv4 | ipv6] counters to display the IPv4 or IPv6 pack and byte counts.

Command Mode

EXEC

Command Syntax

show route [ipv4 | ipv6]

Parameters
  • ipv4 Displays IPv4 route counters.
  • ipv6 Displays IPv6 route counters.

Example

The following example displays the IPv4 packet and byte count.

switch#show route ipv4 counters
Vrf Name        Prefix       Packet Count    Byte Count
-------- ---------------- ------------------ ----------
 default    22.0.0.0/8                     0          0
 default    32.0.0.0/8                     0          0

show transceiver status interface

The show transceiver status interface [<intf>] command displays the most important alarms, faults and interface status.

Example

For 400GBASE-ZR modules, media and host side coherent alarms, host-side pre-FEC BER, defined in the Coherent CMIS and post-FEC BER have been added to the command’s output:
switch#show transceiver status interface Ethernet14/1
                                Current State        Changes       Last Change
                                -------------        -------       -----------
Port 14
  Transceiver                   400GBASE-ZR                1       0:15:09 ago
  Transceiver SN                200554050                          
  Presence                      present                            
  Adapters                      none                               
  Bad EEPROM checksums                                     0       never
  Resets                                                   0       0:15:14 ago
  Interrupts                                               0       never
  Data path firmware fault      ok                         0       never
  Module firmware fault         ok                         0       never
  Temperature high alarm        ok                         0       never
  Temperature high warn         ok                         0       never
  Temperature low alarm         ok                         0       never
  Temperature low warn          ok                         0       never
  Voltage high alarm            ok                         0       never
  Voltage high warn             ok                         0       never
  Voltage low alarm             ok                         0       never
  Voltage low warn              ok                         0       never
  Module state                  ready                      4       0:14:55 ago
  Data path 1 state             activated                  4       0:07:21 ago
  Data path 2 state             activated                  4       0:07:21 ago
  Data path 3 state             activated                  4       0:07:21 ago
  Data path 4 state             activated                  4       0:07:21 ago
  Data path 5 state             activated                  4       0:07:21 ago
  Data path 6 state             activated                  4       0:07:21 ago
  Data path 7 state             activated                  4       0:07:21 ago
  Data path 8 state             activated                  4       0:07:21 ago
  RX LOS                        ok                         2       0:05:54 ago
  TX fault                      ok                         0       never
  RX CDR LOL                    ok                         0       never
  TX power high alarm           ok                         0       never
  TX power high warn            ok                         2       0:07:39 ago
  TX power low alarm            ok                         2       0:07:50 ago
  TX power low warn             ok                         4       0:07:39 ago
  TX bias high alarm            ok                         0       never
  TX bias high warn             ok                         0       never
  TX bias low alarm             ok                         0       never
  TX bias low warn              ok                         0       never
  RX power high alarm           ok                         0       never
  RX power high warn            ok                         0       never
  RX power low alarm            ok                         0       never
  RX power low warn             ok                         0       never
  TX loss of alignment          ok                         0       never
  TX out of alignment           ok                         0       never
  TX clock monitor unit LOL     ok                         0       never
  TX reference clock LOL        ok                         0       never
  TX deskew LOL                 ok                         0       never
  TX FIFO error                 ok                         0       never
  RX demodulator LOL            ok                         0       never
  RX CD compensation LOL        ok                         0       never
  RX loss of alignment          ok                         0       never
  RX out of alignment           ok                         0       never
  RX deskew LOL                 ok                         0       never
  RX FIFO error                 ok                         0       never
  RX FEC excessive degrade      ok                         0       never
  RX FEC detected degrade       ok                         0       never
  Freq tuning in progress       idle                       0       never
  Freq tuning busy              ok                         0       never
  Freq tuning invalid channel   ok                         0       never
  Freq tuning completed         no                         2       0:07:34 ago
Ethernet14/1
  Operational speed             400Gbps                            
  Pre-FEC bit error rate        0.00e+00                           
  Post-FEC errored frames ratio 0.00e+00                           
  TX LOS
    Host lane 1                 ok                         0       never
    Host lane 2                 ok                         0       never
    Host lane 3                 ok                         0       never
    Host lane 4                 ok                         0       never
    Host lane 5                 ok                         0       never
    Host lane 6                 ok                         0       never
    Host lane 7                 ok                         0       never
    Host lane 8                 ok                         0       never
  TX CDR LOL
    Host lane 1                 ok                         0       never
    Host lane 2                 ok                         0       never
    Host lane 3                 ok                         0       never
    Host lane 4                 ok                         0       never
    Host lane 5                 ok                         0       never
    Host lane 6                 ok                         0       never
    Host lane 7                 ok                         0       never
    Host lane 8                 ok                         0       never
  TX adaptive input EQ fault
    Host lane 1                 ok                         0       never
    Host lane 2                 ok                         0       never
    Host lane 3                 ok                         0       never
    Host lane 4                 ok                         0       never
    Host lane 5                 ok                         0       never
    Host lane 6                 ok                         0       never
    Host lane 7                 ok                         0       never
    Host lane 8                 ok                         0       never
Note:In the operational state, module state is ‘Ready’ and datapath state for all 8 lanes is activated.

show vxlan counters vni

Use the show vxlan counters vni command to display the encapsulation and decapsulation counters at the VNI.

Command Mode

Privledged EXEC

Command Syntax

show vxlan counters vni [encap | decap]

Parameters
  • encapDisplays the encapsulation related counters at the VNI.
  • decap Displays the decapsulation related counters at the VNI.
Examples
  • The following show vxlan counters vni encap command displays the encapsulation related commands at the VNI.

    switch#show vxlan counters vni encap
                                          Encap BUM   Encap Drop
    VNI       Encap Bytes  Encap Packets  Packets     Packets
    -------- ------------- -------------- ----------- -----------
    2824963             0               0           0           0
    7023745             0               0           0           0

    Encap Packets displays the total count of L2 packets that have been successfully encapsulated by the VNI towards the VTEP.

    Encap Drop Or Exception Packets display the total count of L2 packets that have been encapsulated and dropped for any reason.

  • The following show vxlan counters vni decap command displays the decapsulation related counters at the VNI.
    switch#show vxlan counters vni decap
                                                          Decap Drop Or             
                                Decap Known   Decap BUM       Exception
    VNI       Decap Bytes   Unicast Packets      Packets        Packets
    -------   -----------   ---------------   ----------   -------------
    2824963             0                 0            0               0
    7023745             0                 0            0               0

    Decap Known UnicastPkts displays the total count of L2 known unicast packets coming into the VTI hitting the VTEP and getting decapsulated.

    Decap BUM Packets displays the total count of L2 BUM packets coming into the VTI hitting the VTEP and getting decapsulated.

    Decap Drop or Exception Packets displays the count of L2 packets coming into the VTI and getting dropped for any reason.

speed

The speed command configures the transmission speed and duplex setting for the configuration mode interface. The scope and effect of this command depends on the interface type. Interface types include:
  • 40GBASE (QSFP+): Default is 4x10G-full. Speed forced 40gfull and Speed auto 40gfull configure interface as a 40G port.
  • 10GBASE-T: Default is 10G-full. Speed command affects interface.
  • 10GBASE (SFP+): Default is 10G-full. Speed command does not affect interface.
  • 1000BASE (copper): Default is 1G-full. speed auto 100full affects interface.
  • 1000BASE (fiber): Default is 1G-full. Speed command does not affect interface.
  • 10/100/1000: Default is auto-negotiation. Speed command (10/100/1000 options) affects interface.

The speed 40gfull and auto 40gfull commands configure a QSFP+ Ethernet interface as a 40G port. The no speed and no auto 40gfull commands configure a QSFP+ Ethernet interface as four 10G ports. These commands must be applied to the /1 port. These commands are hitless on the 7050X, 7060X, 7250X, 7260X, 7280SE, 7300X, 7320X and 7500E series platforms. On all other platforms, these commands restart the forwarding agent, which will result in traffic disruption.

The no speed and default speed commands restore the default setting for the configuration mode interface by removing the corresponding speed command from running-config.

Command Mode

Interface-Ethernet Configuration

Interface-Management Configuration

Command Syntax

speed MODE

no speed

default speed

Parameters
MODE Transmission speed and duplex setting. Options include:
  • speed auto auto negotiation mode. (For SFP-1G-T, auto-negotiates 1Gbps, this is because no speed is specified, and we are defaulting to advertise 1G).
  • speed auto 40gfull auto negotiation mode with clause 73 auto negotiation.
  • speed auto 1G full/ speed 1G auto-negotiated 1Gbps (note that per BASE-T standard, 1G must be negotiated).
  • speed auto 100full auto-negotiated 100Mbps.
  • speed 100full non-negotiated and true-forced 100Mbps.
    Note: Interfaces using clause 73 auto negotiation must connect to a device that runs clause 73 auto negotiation.
  • sfp-1000baset auto auto-negotiation mode (fu).
  • 10000full 10G full duplex.
  • 1000full 1G full duplex.
  • 1000half 1G half duplex.
  • 100full 100M full duplex.
  • 100gfull 100G full duplex.
  • 100half 100M half duplex.
  • 10full 10M full duplex.
  • 10half 10M half duplex.
  • 40gfull 40G full duplex.

On 40GBASE and 100GBASE interfaces, options that change the SFP+ and MXP interfaces (the auto 40gfull, the 40gfull, and the no speed options) may restart the forwarding agent on some switch platforms, disrupting traffic on all ports for more than a minute.

Guidelines
Note: The SFP-1G-T transceivers advertise one speed at a time only. Hence, the desired speed and negotiation must be configured explicitly using the speed auto, speed auto 1G full/ speed 1G, speed auto 100full, and speed 100full commands.
Examples
  • This command configures a 40GBASE interface as a 40G port.
    switch(config)#interface ethernet 49/1
    switch(config-if-Et49/1)#speed 40gfull
    switch(config-if-Et49/1)#show interface ethernet 49/1 - 49/4 status
    Port      Name          Status       Vlan        Duplex  Speed Type
    Et49/1                  connected    in Po999      full    40G 40GBASE-CR4
    Et49/2                  errdisabled  inactive    unconf unconf 40GBASE-CR4
    Et49/3                  errdisabled  inactive    unconf unconf 40GBASE-CR4
    Et49/4                  errdisabled  inactive    unconf unconf 40GBASE-CR4
    switch(config-if-Et49/1)#
  • This command configures a 40GBASE interface as four 10G ports (default configuration).

    
    switch(config-if-Et49/1)#no speed
    switch(config-if-Et49/1)#show interface ethernet 49/1 - 49/4 status
    Port      Name          Status       Vlan        Duplex  Speed Type
    Et49/1                  connected    routed        full    10G 40GBASE-SR4
    Et49/2                  connected    routed        full    10G 40GBASE-SR4
    Et49/3                  connected    routed        full    10G 40GBASE-SR4
    Et49/4                  notconnect   inactive      full    10G 40GBASE-SR4
    switch(config-if-Et49/1)#

system

The system command allows the user to configure the system-wide TCAM profiles such as default, mirroring-acl, mpls-evpn, pbr-match-nexthop-group, qos, tap-aggregation-default, tap-aggregation-extended, tc-counters, test, and vxlan-routing.

The exit command returns the switch to global configuration mode.

Command Mode

Hardware TCAM

Command Syntax

system profile name

Parameter

name TCAM profile name.

Reference

hardware tcam

Example

This commands allow the switch to configure the TCAM profile qos.
switch(config-hw-tcam)#system profile qos

threshold

The threshold command configures the link monitoring threshold value that is specified for a link error.

The no threshold and the default threshold commands remove the threshold value specified for the chosen link error.

Command Mode

Link-error Configuration

Command Syntax

[fcs | symbol] threshold threshold_value

no [fcs | symbol] threshold threshold_value

default [fcs | symbol] threshold threshold_value

Parameters
  • fcs Inbound packets with Frame check sequence (FCS) error.
  • symbol Inbound packets with symbol error.
  • threshold_value Specifies the threshold value in number of errors. The value ranges from 1 to 100.
Related Commands

Example

These commands set the threshold value of 20 for the profile profile1 in the link-error configuration mode.
switch(config)#monitor ethernet oam
switch(config-eoam)#profile profile1
switch(config-eoam-profile-profile1)#link-error                        
switch(config-eoam-profile-profile1-link-error)#symbol threshold 20

transceiver channel

The transceiver channel command displays transceiver wavelength/frequency by channel number. The channel numbering depends on the selected grid-spacing mode. The default grid-spacing mode is 50GHz-spacing.
  • If the startup configuration does not specify the channel number for the interface, the transceiver will automatically tune to the default channel (i.e. channel-39 of 50GHz-spacing grid) when it is inserted.
  • If the configured wavelength/frequency is not supported by the transceiver, the transceiver is tuned to the default channel (i.e. channel-39 of 50GHz-spacing grid).

The interface is shutdown before the channel number is configured.

Command Mode

Global Configuration

Command Syntax

transceiver channel CHANNEL_NUMBER grid-spacing SPACING_GRID

no transceiver channel CHANNEL_NUMBER grid-spacing SPACING_GRID

default transceiver channel CHANNEL_NUMBER grid-spacing SPACING_GRID

Parameters
  • CHANNEL-NUMBER The default channel is 39 (50GHz-spacing grid) which corresponds to a frequency of 193,100 GHz and a wavelength of 1552.52 nm.
  • GRID_SPACING Grid-spacing mode (optional) depends on the selected grid-spacing mode. The default grid-spacing mode is 50GHz-spacing. For example, channel 39 of 50GHz-spacing grid is equivalent to channel 20 of 100GHz-spacing grid, which corresponds to a frequency of 193,100 GHz and a wavelength of 1552.52 nm.
    • SPACING_GRID default grid-spacing mode in GHz.

Example

This command tunes the transceiver on slot number 4 to slot 1 through 3 of 50GHz-spacing grid.
switch(config-as)#interface ethernet 4/1/3
switch(config-if-Et4/1/3)#transceiver channel 1 grid-spacing 50
switch(config-if-Et4/1/3)#

transceiver qsfp default-mode

The transceiver qsfp default-mode command specifies the transmission mode of all QSFP transceiver modules that are not explicitly configured.

Each QSFP+ module Ethernet interface is configurable as a single 40G port or as four 10G ports. The switch displays four ports for each interface. Each ports status depends on the interface configuration:
  • The /1 port is active (connected or not connected), regardless of the interface configuration.
  • The /2, /3, and /4 ports are error-disabled when the interface is configured as a single 40G port.
  • All ports are active (connected or not connected), when the interface is configured as four 10G ports.

QSFP modules that are not configured through a speed command are operated as four 10G ports.

The no transceiver qsfp default-mode and default transceiver qsfp default-mode commands restore the default-mode transceiver setting from 40G to4x10G.

Command Mode

Global Configuration

Command Syntax

transceiver qsfp default-mode 4x10G

no transceiver qsfp default-mode

default transceiver qsfp default-mode

Note: QSFP100 ports with external PHY always have 40G as the default QSFP mode.
Guidelines

The transceiver qsfp default-mode 4x10g statement is always in running-config and cannot be modified or removed in the current release.

Example
  • When default QSFP mode is configured as 4x10G, the show running-config contains transceiver qsfp default-mode 4x10G. show interfaces hardware shows 10G as the default speed.
    switch(config)#transceiver qsfp default-mode 4x10G
    switch(config)#show running-config | grep 4x10G
    transceiver qsfp default-mode 4x10G
    switch(config)#show interfaces ethernet 35/1 hardware
    *  = Requires speed group setting change
    Ethernet35/1
      Model:          DCS-7280CR3-32P4
      Type:           40GBASE-CR4
      Speed/Duplex:   10G/full(default),40G/full,auto
      Flowcontrol:    rx-(off,on,desired),tx-(off)
    
  • When QSFP mode configuration is reverted to the default, show running-configdoes not contain transceiver qsfp default-mode 4x10G. show interfaces hardware shows 40G as the default speed.
    switch(config)#no transceiver qsfp default-mode
    switch(config)#show running-config | grep 4x10G
    switch(config)#show interfaces ethernet 35/1 hardware
    *  = Requires speed group setting change
    Ethernet35/1
      Model:          DCS-7280CR3-32P4
      Type:           40GBASE-CR4
      Speed/Duplex:   10G/full,40G/full(default),auto
      Flowcontrol:    rx-(off,on,desired),tx-(off)