RoHS Information

This appendix provides Taiwan BSMI and China RoHS information for the devices described in this guide.

Figure 1. AN1792



Regulatory Model Numbers

This section lists the devices' Regulatory Model Number (RMN) described in this document.

Table 1. Regulatory Model Number (RMN)
Networking Device Regulatory Model Number (RMN)

ZTX-7250S-16S-F

 AN1792

LCD Operation

This section describes the operation of the LCD panel.

Figure 1. LCD Components

1 2x 16 LCD screen
2 Top button
3 Bottom button

Buttons Functionality

The physical buttons are referenced as follows:
  • Top - the top button located above next to the less-than (<) symbol
  • Bottom - the bottom button located above next to the check mark (✔️) symbol

Each button has a functionality based on the button and how long the button is pressed.

Button Press Duration < 2 Secs Press Duration >= 2 Secs
Top button scroll home
Bottom button select confirm

 

Booting

After the power is on, the LCD displays the image shown below:


After the bootloader is booted and when the EOS image has begun loading, the LCD displays the image shown below:


 

Home Screen

After the EOS has successfully booted, the LCD displays the home screen. The below image is an example output:


The first line displays the hostname, and the second line displays the IPv4 address of the management interface.

Note: To return to the home screen, you can hold the top button for two seconds (“home” function) at any point.

 

Menu Choices

At the home screen, select the top button (“scroll” function) to scroll through possible menu choices. The menu choice will be displayed on the top line, and the bottom line will be blank.


Select the bottom button to select the menu item (select function).

Note: If you do not select within 10 seconds, the LCD will return to the home screen. Alternatively, use the “home” function to return to the home screen.

 

Menu Item Output

Although the physical display is limited to two rows and 16 characters per row, a menu item may display a larger virtual information display. If the width of the line being displayed is wider than the physical screen, then the display will automatically scroll back and forth to display the entire line.

If the number of lines displayed exceeds the physical height, you can scroll through the output using the LCD buttons. Select the top button (“scroll” function) to see earlier lines, and select the bottom button (“select” function) to see later lines.

 

System Info

The System Info menu item shows the following information:

  • Model name

  • EOS version

  • Hardware revision

  • Serial number

  • MAC address of the management interface

Example:

The following figure shows the first two lines of the data:


Note: The SKU is longer than the display area and scrolls over the display area.

Interface Configuration and Behavior

This section describes the interface configuration and behavior of the following devices:

ZTX-7250S-16S-F

This section describes the interface configuration of the ZTX-7250S-16S-F MSS Appliance from a physical layer perspective. This section includes the following topics:

Hardware Description

Figure 1. ZTX-7250S-16S-F Front Panel

1 16x 10G SFP+ ports 2 4x NIM (Network Interface Module) 3.0 slots

The ZTX-7250S-16S-F MSS Appliance provides 50 Gbps Encrypted / 100 Gbps aggregate throughput and has 16x 10G Ethernet ports (SFP+) and 4x Network Interface Module (NIM) expansion slots. The ports are labeled as 1 through 16.

In the EOS CLI, all the onboard ports have the prefix 1 (Et1/X, X from 1-16) to indicate that they are on the main system rather than the pluggable NIM cards.

Label Port Number Port Type EOS Interface
1 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 SFP+ Et1/1, Et1/2, Et1/3, Et1/4, Et1/5, Et1/6, Et1/7, Et1/8, Et1/9, Et1/10, Et1/11, Et1/12, Et1/13, Et1/14, Et1/15, Et1/16
2 Slot 2, Slot 3, Slot 4, Slot 5 Network Interface Module (NIM)  

 

Interface Capabilities

This section describes interface capabilities. These capabilities are displayed using the following command:

show interfaces <INTF> hardware default

Interface speed and auto-negotiation depend on the mac/phy capabilities, the front panel connector, and the type of transceiver inserted. The default capabilities of the device are as follows:

Ports Speed Auto-negotiation
Port 1-8 1G/10G 1G full

1G full duplex
Port 9-16 1G/10G 1G/10G full duplex

1G full duplex

When a transceiver is inserted, EOS recognizes the transceiver type. To see which types of transceivers are supported, refer to the Supported Transceivers. If the transceiver is supported, EOS decides the capable speed and auto-negotiation satisfied by both the hardware and the modules. To view the show commands and examples output, refer to Show Commands for Speed and Auto-negotiation Capabilities.

When there is no speed configuration on the interface, EOS applies the default speed. On an RJ45 port, the default configuration is auto-negotiation, enabled with 10G. On an SFP port, the default configuration is auto-negotiation, disabled with 10G.

 

Speed Configuration

This section describes the configuration of interface speed and auto-negotiation.

Interface speed and auto-negotiation are configured using the speed speed-lane-token command, as shown in the following examples:

To configure 10G speed with auto-negotiation disabled:

Arista(config-if-Et1/1)# speed 10g

To configure 1G speed with auto-negotiation disabled:

Arista(config-if-Et1/1)# speed 1g

To configure 10G speed with auto-negotiation enabled:

Arista(config-if-Et1/1)# speed auto 10gfull

To configure 5G speed with auto-negotiation enabled:

Arista(config-if-Et1/1)# speed auto 5gfull

To configure 2.5G speed with auto-negotiation enabled:

Arista(config-if-Et1/1)# speed auto 2.5gfull

To configure 1G speed with auto-negotiation enabled:

Arista(config-if-Et1/1)# speed auto 1gfull

To remove speed configuration:

Arista(config-if-Et1/1)# no speed

 

Note: If the selected speed and auto-negotiation combination is unsupported (either based on the inserted transceiver or due to the interface capabilities), the interface is put into an error-disabled state with “speed-misconfigured” as the cause.

Use the following show command to check whether interfaces are connected, not connected, or error-disabled:

Arista(config)# show interfaces status
Port Name Status Vlan Duplex SpeedType Flags Encapsulation
Et1/1 connectedrouted full 10G10GBASE-T
Et1/2 connectedrouted full 10G10GBASE-T
Et1/3 connectedrouted full 10G10GBASE-T
Et1/4 connectedrouted full 10G10GBASE-T
Et1/5 connectedrouted full 10G10GBASE-CR
Et1/6 connectedrouted full 10G10GBASE-CR
Et1/7 connectedrouted full 10G10GBASE-CR
Et1/8 errdisabledrouted full 100G 10GBASE-CR

 

Use the following show command to display why an interface is error-disabled:

Arista(config)# show interfaces ET1/8 status errdisabled
PortName Status Reason
----------- ---------------- ------------ -------------------
Et1/8errdisabled speed-misconfigured

When a transceiver is in an error-disabled state due to a misconfigured speed, the following syslog message is logged:

bessd[4392]: %ETH-4-LINKMODEUNSUPPORTED: Unsupported link mode 100G/full for interface Ethernet1/8
Ebra: %ETH-4-ERRDISABLE: speed-misconfigured error detected on Ethernet1/8.

Show Commands for Speed and Auto-negotiation Capabilities

Supported speed and auto-negotiation are displayed by the following command when the transceiver is inserted:

show interfaces <INTF> hardware

Arista(config)#show int ET1/1 hardware Ethernet1/1
Model: ZTX-7250F-16S-F 
Type: 10GBASE-SR
Speed/duplex: 10G/full(default)
Flowcontrol: rx-(off),tx-(off)
Error correction: unsupported

 

Supported Transceivers

The onboard SFP ports support a wide range of 1G and 10G pluggable transceivers. The first eight ports (ports 1-8) support the following transceivers:

  • CAB-SFP-SFP (10GBASE-CR)

  • AOC-S-S-10G (10GBASE-AOC)

  • SFP-10G-SRL

  • SFP-10G-SR

  • SFP-10G-LRL

  • SFP-10G-LR

  • SFP-1G-SX

  • SFP-1G-LX

  • SFP-1G-T

The last eight ports (ports 9-16) support the following transceivers:

  • CAB-SFP-SFP (10GBASE-CR)

  • AOC-S-S-10G (10GBASE-AOC)

  • SFP-10G-SRL

  • SFP-10G-SR

  • SFP-10G-LRL

  • SFP-10G-LR

  • SFP-10G-ER

  • SFP-10G-ZR

  • SFP-10G-DZ (10GBASE-DWDM)

  • SFP-10G-T

  • SFP-1G-SX

  • SFP-1G-LX

  • SFP-1G-T

For details about the different transceivers, modules, and cables, visit https://www.arista.com/en/products/transceivers-cables.

 

Transceiver Configuration Command Support

The first eight ports (ports 1-8) are subject to minor differences in transceiver configuration.

The shut and no shut configuration commands may not use the SFP transceiver’s TX Disable control register software. Instead, the TX Disable hardware low-speed pin signal will always be used. This does not result in operational or behavioral differences for Arista Networks transceivers.

The configuration commands transceiver frequency and transceiver channel are not supported on the first eight ports (ports 1-8).

 

Front Panel Port LEDs

When using the locator-led interface CLI command, the first eight port LEDs (ports 1-8) may flash at a different rate than the last eight port LEDs (ports 9-16).

 

Caveats

Auto-negotiation parallel detection on ports 1-8.

Parallel detection is used on the ports 1-8, where the ports can perform auto-negotiation. This happens when the link partner might not support auto-negotiation, or the auto-negotiation is disabled on the device. In this condition, the port capable of auto-negotiation can determine if it should use auto-negotiation and can match the speed with the other device.

Parallel detection is enabled by default and cannot be disabled. Links can come up with a mismatch in auto-negotiation configuration. If auto-negotiation is enabled on Arista ZTX-7250F-16S-F ports 1-8, but not on the link partner and links can be established, then auto-negotiation status is successful.

Arista(config-if-Et1/1)#show int st
Port Name Status Vlan Duplex SpeedType Flags Encapsulation
Et1/1 connectedrouted a-full a-1G 1000BASE-SX

 

LinkPartner(config)#show int ET25 st
Port Name Status Vlan Duplex SpeedType Flags Encapsulation
Et25connected1full 1G 1000BASE-SX

 

Arista(config-if-Et1/1)#show int ET1/1 negotiation detail Ethernet1/1
Auto-Negotiation Mode 1000BASE-X (IEEE Clause 37)
Auto-Negotiation Status Success
Speed DownshiftingNot Applicable

Advertisements Speed Duplex Pause
 ----------------- ---------- --------------------
Local1Gfull Disabled
Link Partner 1Gfull Disabled

Resolution 1Gb/s full Rx=Unsupp.,Tx=Unsupp.

Rear Panel

The section describes the rear panel of the following devices.

ZTX-7250S-16S-F

The ZTX-7250S-16S-F MSS Appliance rear panel includes the following key components:

Figure 1. ZTX-7250S-16S-F Rear Panel


1 Fan module 1 10 PS1 LED
2 Fan module latch 11 Functional grounding point
3 Fan module 2 12 PS2 LED
4 Fan module latch 13 Power supply 2 (PS2)
5 Fan module 3 14 Fan status LED
6 Fan module latch 15 Fan status LED
7 Fan module 4 16 Fan status LED
8 Fan module latch 17 Fan status LED
9 Power supply 1 (PS1)    

Front Panel

This section describes the front panel of the following devices:

ZTX-7250S-16S-F

The ZTX-7250S-16S-F MSS Appliance front panel includes the following key components:

Figure 1. ZTX-7250S-16S-F Front Panel

1 System status LEDs 6 4x NIM (Network Interface Module) 3.0 slots
2 USB port Type-A 7 16x 10G SFP+ enhanced ports
3 LCD panel 8 RJ45 Ethernet management port
4 LCD upper button 9 Console port
5 LCD lower button 10 USB port Type-C

Parts List

This section lists the accessory kit's default and optional installation parts. Each product comes with an accessory kit containing the necessary parts to install it.

Figure 1. Four-post Rack Mount Kit Parts


1 Mounting bracket 4 Rack plugs
2 Rail slide 5 Screws (for fixing rack plugs to rail rod and rail slide)
3 Rail rod    

  • Cables

    • RJ45 Ethernet cable

    • Console cable

  • Power cable (country-specific, only included if specified before purchase)

 

Product Description

Networking Device Product Description

ZTX-7250S-16S-F

 Arista 7250 ZTX MSS Appliance, up to 100Gbps, 8x 10G SFP+ ports, 8x 10G SFP+ enhanced ports, 4 expansion slots, front to rear air, 2x AC.

Configuring the Device

Arista devices ship from the factory in Zero Touch Provisioning (ZTP) mode. ZTP configures the device without user intervention by downloading a startup configuration file or a boot script from a location specified by a DHCP server.

To manually configure an Arista device, bypass ZTP. The initial configuration provides one username (admin) that is accessible only through the console port because it does not have a password.

When bypassing ZTP, access the device by logging in as admin, with no password, through the console port. Then, you can configure a password for admin and other password-protected usernames.

The manual configuration procedure described below cancels ZTP mode, logs into the device, assigns a password to the admin, assigns an IP address to the management port, and defines a default route to a network gateway.

As the device boots without a startup-config file, it displays the following through the console: 
The device is in Zero Touch Provisioning mode and is attempting to
download the startup-config from a remote system. The device will not
be fully functional until either a valid startup-config is downloaded
from a remote system or Zero Touch Provisioning is cancelled. To cancel
Zero Touch Provisioning, login as admin and type 'zerotouch cancel'
at the CLI.
localhost login:

 

  1. Connect the device to a power source (Cable the Device).
    Note: Arista fixed devices take approximately 5 to 10 minutes to boot completely.
  2. Connect the console port to a computer (Connecting Serial and Management Cables).
  3. Log into the device by typing admin at the login prompt. 
    localhost login: admin

     

  4. Cancel ZTP mode by typing zerotouch cancel
    Important: This step initiates the device to reboot.
    localhost> zerotouch cancel

     

  5. After the device reboots, log into the device again by typing admin at the login prompt. 
    Arista EOS
localhost login: admin
Last login: Fri Mar 15 13:17:13 on console

     

  6. Enter global configuration mode. 
    localhost>enable localhost#config

     

  7. Assign a password to the admin username using the username secret command. In this example, the assigned password is "pxq123". 
    localhost(config)#username admin secret pxq123

     

  8. Configure a default route to the network gateway. In this example, the default route is 192.0.2.1. 
    localhost(config)#ip route 0.0.0.0/0 192.0.2.1

     

  9. Assign an IP address to an Ethernet management port. In this example, the IP address is 192.0.2.8/24. 
    localhost(config)#interface management 1/1
localhost(config-if-Ma1/1)#ip address 192.0.2.8/24

     

  10. Save the configuration by typing write memory or copy running-config startup-config. 
    localhost#copy running-config startup-config

     

  11. When configuring the management port IP address, select the following command to access the device from a host using the address configured in Step 9. 
    ssh admin@192.0.2.8

    Refer to the Arista Networks User Manual for the complete device configuration information.

     

Cable the Device

The following topics are covered in this section:

Grounding the Device

This section provides instructions for grounding the device.

Note: Grounding cable and grounding lugs are not included with the product.

 

Note: The cable size should meet local and national installation requirements.
Figure 1. Functional Grounding Pad Sockets ZTX-7250S-16S-F Rear Panel

 

Figure 2. Lug Preparation
1 Insulated cable A 1/4″
2 Heat-shrink tubing B 1/2″
3 Lug C 5/8″
Note: Dimension B is the width of the lug (not visible on the right-angle lug).

 

CAUTION: Remove the earth connection if all supply connections are disconnected.

 

  1. Ensure the rack is properly grounded and in compliance with ETSI EN 300 253.
  2. Ensure a good electrical connection to the rack's grounding point (no paint or isolating surface treatment).
  3. Attach the solder terminal lug to an 18 AWG minimum grounding cable and connect it to the grounding point on the device's rear panel.
  4. Tighten the screw to secure the lug to the grounding point.
  5. Connect the other end of the cable to the nearby grounded surface.

Connecting Power Cables

Power cords are optional and must ordered separately. You must use an approved power cord that is compliant with local and national electrical codes or order one from Arista for use with this device.

Important: Installation of this equipment must comply with local and national electrical codes. Consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

 

Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour assurer la conformité.

 

The device accommodates two power supplies. At least one power supply must connect to a power source. Connecting both power supplies provides redundancy protection. The Rear Panel displays the location of the power supply unit.
  • Non-redundant configuration: Connect power to either of the two power supplies.
  • Redundant power supply configuration: Connect power to both power supplies.
  • Turn off the device: Remove all power cords and wires from the power supplies.
Important: The installation of this equipment must comply with local and national electrical codes. Consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

 

Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour assurer la conformité.

 

Important: Read all installation instructions before connecting the system to the power source.

 

Lire toutes les instructions d’installation avant de brancher le système à la source d’alimentation.

 

Important: This equipment must be grounded. Never defeat the ground conductor.

 

Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre.

 

Important: This unit requires overcurrent protection.

 

Cet appareil requiert une protection contre les surintensités.

 

AC Power Supplies

The following AC power supplies are supported:
  • PWR-861-AC-RED (ZTX-7250S-16S-F)

The following image displays an AC power supply, including the power socket on the left side of the module. The AC power supply connects to a circuit that provides the required power, as specified in the Specifications section.

Figure 3. AC Power Supply (Example)

The power supplies require cables that comply with IEC-320 and have a C14 connector. The accessory kit provides two IEC-320 C13 to C14 power cables.

Connecting Serial and Management Cables

The accessory kit includes the following cables:
  • RJ45 to DB9 serial adapter cable
  • RJ45 Ethernet cable

The following table lists the pin connections of the RJ45 to DB9 adapter cable.

Table 1. RJ45 to DB9 Connections

RJ45

DB9

  

RJ45

DB9
RTS 1 8 CTS   GND 5 5 GND
DTR 2 6 DSR   RXD 6 3 TXD
TXD 3 2 RXD   DSR 7 4 DTR
GND 4 5 GND   CTS 8 7 RTS
Connect the front or rear panel ports as follows:
  • Console (serial) port: Connect to a computer with the RJ45 to DB9 serial adapter cable. The device uses the following default settings:
    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits
  • Ethernet management port: Connect to 10/100/1000 management network with RJ45 Ethernet cable.
  • USB port: The two USB ports (Type-A and Type-C) may be used for software or configuration updates.
    CAUTION: Excessive bending can damage interface cables.

     

    Flexion excessive peut endommager les câbles d’interface.

     

Status Indicators

This section describes the meaning of the front-panel LED status indicators.

Table 1. LED Status Indicators
LED Name LED State LED Status
System Status LED Off No power or amid a power cycle.
Blinking green The system is powering up.
Green The system is operating in a normal initialization sequence. Normal operations.
Blue The locator function is active.
Amber The system is malfunctioning. System is overheated, or temperature sensors have recorded passing the software-defined critical threshold.

The device will automatically execute a reboot/power cycle.
Cloud Connect Status LED Off The system is not connected to CloudVision.
Green The system is connected to CloudVision.
Amber Problem connecting to CloudVision.
Fan Status LED Green All fan modules are operating normally.
Amber Single fan module is malfunctioning.
Power Supply Status LED Off Power supply unit is not available.
Green Power supply unit is fully functional.
Amber Power supply unit has a fault.