Quality of Service
- Quality of Service Conceptual Overview
- QoS Configuration: Platform-Independent Features
- QoS Configuration: Arad Platform Switches
- QoS Configuration: Jericho Platform Switches
- QoS Configuration: FM6000 Platform Switches
- QoS Configuration: Petra Platform Switches
- QoS Configuration: Trident and Tomahawk Platform Switches
- QoS Configuration: Trident II and Helix Platform Switches
- Support for Configuring Color Extended Communities
- ACL based QoS Configuration
- Configuring IPv6 Flow Label Matches for QoS
- Differentiated MMU Discard Counters
- Quality of Service Configuration Commands
- Chipset Mapping for QoS
Quality of Service Conceptual Overview
QoS processes apply to traffic that flows through Ethernet ports and control planes. These processes can modify data fields (CoS or DSCP) or assign data streams to traffic classes for prioritized handling. Transmission queues are configurable for individual Ethernet ports to shape traffic based on its traffic class. Many switches also support traffic policies that apply to data that is filtered by access control lists.
Identifying the Switch Platform
QoS configuration varies significantly by switch platform. A list of Arista switch model numbers and their corresponding switch platforms (chipsets) can be found in the Chipset Mapping for QoS.
On some switches, the platform can also be determined by entering platform ? in the CLI.
Example
switch(config)#platform ?
trident Trident chip
switch(config)#QoS Data Fields and Traffic Classes
Quality of Service (QoS) defines a method of differentiating data streams to provide varying levels of service to the different streams.
Criteria determining a packet’s priority level include packet field contents and the port where data packets are received. QoS settings are translated into traffic classes, which are then used by switches to manage all traffic flows. Traffic flow management varies with each switch platform.
QoS Data Fields
- CoS (three bits): Class of service (CoS) is a 3-bit field in Ethernet frame headers using VLAN tagging. The field specifies a priority value between zero and seven. Class of service operates at Layer 2.
- DSCP (six bits): Differentiated Service Code Point (DSCP) is a 6-bit field in the Type Of Service (TOS) field of IP packet headers.
Port Settings – Trust Mode and Traffic Class
- CoS Trust: Ports use inbound packet CoS field contents to derive the traffic class.
- DSCP Trust: Ports use inbound packets DSCP field contents to derive the traffic class.
- Untrusted: Ports use their default values to derive the traffic class, ignoring packet contents.
The default mode setting is CoS trust for switched ports and DSCP trust for routed ports.
Ports are associated with default CoS, DSCP, and traffic class settings; defaults vary by platform.
Rewriting CoS and DSCP
CoS Rewrite
Switches can rewrite the CoS field for outbound tagged packets. The new CoS value is configurable, and is derived from a data stream’s traffic class as specified by the traffic class-to-CoS rewrite map. CoS rewrite is disabled on all the traffic received on CoS trusted ports.
- CoS rewrite is globally enabled by default for packets received on untrusted ports and DSCP trusted ports if at least one port is explicitly configured in DSCP trust or untrusted mode.
- CoS rewrite is globally disabled by default for packets received on untrusted ports and DSCP trusted ports if there are no ports explicitly configured in DSCP trust or untrusted mode.
On Petra platform switches, CoS rewrite is always enabled on DSCP trusted ports and untrusted ports.
DSCP Rewrite
Switches can rewrite the DSCP field for outbound IP packets. On FM6000, Trident and Tomahawk, Trident II, and Helix platform switches, DSCP rewrite is disabled by default on all ports and always disabled for traffic received on DSCP trusted ports. On Petra, Arad, and Jericho platform switches, DSCP rewrite is always disabled.
FM6000, Trident and Tomahawk, Trident II, and Helix platform switches provide a command that enables or disables DSCP rewrite for packets received on CoS trusted ports and untrusted ports. The new DSCP value is configurable, based on the data stream’s traffic class, as specified by the traffic class-to-DSCP rewrite map.
Traffic Classes
- CoS field contents.
- DSCP field contents.
- Inbound port trust setting.
- CoS default setting (Arad, Jericho, FM6000, Trident and Tomahawk, Trident II, and Helix platform switches).
- DSCP default setting (Arad, Jericho, FM6000, Trident and Tomahawk, and Trident II platform switches).
- Traffic class default setting (Petra platform switches).
- A CoS-to-traffic class map derives a traffic class from a CoS value.
- A DSCP-to-traffic class map derives a traffic class from a DSCP value.
Map entries are configurable through CLI commands. Default maps determine the traffic class value when CLI map entry commands are not configured. Default maps vary by switch platform.
- Traffic Class Derivations – Arad Platform Switches
- Traffic Class Derivations – Jericho Platform Switches
- Traffic Class Derivations – FM6000 Platform Switches
- Traffic Class Derivations – Petra Platform Switches
- Traffic Class Derivations – Trident and Tomahawk Platform Switches
- Traffic Class Derivations – Trident II and Helix Platform Switches
Transmit Queues and Port Shaping
Transmit queues are logical partitions of an Ethernet port’s egress bandwidth. Data streams are assigned to queues based on their traffic class, then sent as scheduled by port and transmit settings. Support varies by switch platform. A queue’s label determines its priority: queues with the suffix 0 have the lowest priority.
- Traffic class-to-transmit queue mapping determines the transmit queue for
transmitting data streams based on traffic class. The set of available transmit maps vary
by switch platforms:
- Arad, Jericho, FM6000, Trident II, and Helix platforms: one map for all unicast and multicast traffic.
- Trident and Tomahawk platform: one map for unicast traffic and one map for multicast traffic.
- Petra platform: one map for unicast traffic. Queue shaping is not available for multicast traffic.
- Port shaping specifies a port’s maximum egress bandwidth.
- Queue shaping specifies a transmit queue’s maximum egress bandwidth, and
implementation varies by platform.
- Trident and Tomahawk platform: queue shaping is configurable separately for unicast and multicast queues.
- Trident II platform: queue shaping is configurable for transmit queues. Port shaping and queue shaping are supported only in store-and-forward switching mode.
- Petra platform: queue shaping is not available for multicast traffic.
- Helix platform: queue shaping is configurable for transmit queues.
- FM6000 platform: switches do not support simultaneous port shaping and queue shaping. Enabling port shaping on an FM6000 switch disables queue shaping, regardless of the previous configuration.
- Guaranteed bandwidth guarantees the allocation of a specified bandwidth for a transmit queue. Guaranteed bandwidth is supported only on Trident II platforms.
- Queue priority specifies the priority at which a transmit queue is serviced. The
switch defines two queue priority types:
- Strict priority queues are serviced in the order of their priority rank - subject to each queue’s configured maximum bandwidth. Data is not handled for a queue until all queues with higher priority are emptied or their transmission limit is reached. These queues typically carry low latency real time traffic and require highest available priority.
- Round robin queues are serviced simultaneously subject to assigned bandwidth percentage and configured maximum bandwidth. All round robin queues have lower priority than strict priority queues. Round robin queues can be starved by strict priority queues.
- Queue scheduling determines how packets from different transmit queues are serviced to be sent out on the port.
- Queue bandwidth allocation specifies the time slice (percentage) assigned to a round robin queue, relative to all other round robin queues.
- Transmit Queues and Port Shaping – Arad Platform Switches
- Transmit Queues and Port Shaping – Jericho Platform Switches
- Transmit Queues and Port Shaping – FM6000 Platform Switches
- Transmit Queues and Port Shaping – Petra Platform Switches
- Transmit Queues and Port Shaping – Trident and Tomahawk Platform
- Transmit Queues and Port Shaping – Trident II and Helix Platform Switches
Explicit Congestion Notification (ECN)
Explicit Congestion Notification (ECN) is an IP and TCP extension that facilitates end-to-end network congestion notification without dropping packets. ECN recognizes early congestion and sets flags that signal affected hosts. Trident and Tomahawk, Trident II, and Helix platform switches extend ECN support to non-TCP packets.
ECN usage requires that it is supported and enabled by both endpoints. Although only unicast flows are modified by ECN markers, the multicast, broadcast, and unmarked unicast flows can affect network congestion and influence the indication of unicast packet congestion.
ECN Conceptual Overview
- 00: Router does not support ECN.
- 10: Router supports ECN.
- 01: Router supports ECN.
- 11: Congestion encountered.
Networks typically signal congestion by dropping packets. After an ECN-capable host negotiates ECN, it signals impending congestion by marking the IP header of packets encountering the congestion instead of dropping the packets. The recipient echoes the congestion indication back to the sender, which reduces its transmission rate as if it had detected a dropped packet.
- average queue size = (old_avg * (1-2^(-weight))) + (current_queue_size * 2^(-weight))
- where weight is the exponential weight factor used for averaging the queue size.
- Packets are marked based on WRED as follows:
- If average queue size is below the minimum threshold, packets are queued as in normal operation without ECN.
- If average queue size is greater than the maximum threshold, packets are marked for congestion.
- If average queue size is between minimum and maximum queue threshold, packets are either queued or marked. The proportion of packets that are marked increases linearly from 0% at the minimum threshold to 100% at the maximum threshold.
Treatment of packets marked as not ECN capable varies by platform.
ACL Policing
ACL policing monitors the ingress data rates for a particular class of traffic and performs the action configured when the traffic exceeds the user configured value. Therefore, it allows the user to control ingress bandwidth based on packet classification. The incoming traffic is metered and marked by the policing, and based on the metering results the actions are performed.
For example, let us assume that shaping is not enabled, and the link is at 10 Gbps, that is 1.25 bytes/nsec. In such case a each refill cycle will add tokens worth 120 bytes. For a shape rate of 500 Mbps, each refill cycle will add 6 bytes. And for 64 byte worth of tokens we need around 11 refill cycles = 1us. A 64 byte packet coming immediately after a jumbo frame will have to wait longer compared to a jumbo frame coming after 64 byte packet.
- For 10 Gbps, each refill cycle will add tokens worth 120 bytes.
- For 1 Gbps, each refill cycle will add tokens worth 12 bytes.
At lower shaping rates (less than 10 Mbps), granularity and rounding errors may alter the actual shaping rate by 20% from the specified rate, and the rounding errors are much less at higher speeds. For example, At 100 Mbps you will see 98.9Mbps configured in hardware. User can use the show qos interfaces command to verify the interface speed.
- Single Rate Two Color Marker
- Single Rate Three Color Marker
- Two Rate Three Color Marker
Single Rate Two Color Marker
It meters the packet stream and marks packets based on committed burst size (bc) and excess burst size (be).
Single Rate Three Color Marker
- Color-blind Mode: In color-blind mode the incoming packet color is ignored.
- Color-aware Mode: In color-aware mode it is assumed that incoming packet is colored by preceding entity. And, in color-aware mode, a packet never get better than it was. If the input color of the packet is green, it can be marked as green, yellow, or red. But if the input color is yellow, then it can be marked only yellow or red.
Two Rate Three Color Marker
It meters the packet stream and marks its packets based on two rates, peak information rate (pir) and committed information rate (cir), and associated burst sizes (bc and be).The packet is marked red if rate exceeds ‘pir’, and yellow if it exceeds ‘cir’ but not 'pir' and marked green if rate is lower than 'cir'. The two rate mode is configured by setting four parameters pir, cir, bc, and be.
The ACL policing is supported on platforms specified in the table below.
|
Platform Supported |
ACL Policing |
ACL Policing on LAG Interface |
|
Trident |
Yes |
Yes |
|
Trident II |
Yes |
Yes |
|
Trident+ |
Yes |
Yes |
|
FM6000 |
Yes |
Yes |
|
Arad |
Yes |
Only Per-Port |
|
Jericho |
Yes |
Yes |
|
Helix |
Yes |
Yes |
|
XP |
Yes |
Yes |
|
Trident 3 |
Yes |
Yes |
|
Tomahawk |
Yes |
Yes |
|
Tomahawk 2 |
Yes |
Yes |
|
Tofino |
No |
No |
Configuring ACL Policing
- Police command creates a per-interface policer. If you attach per-interface policers to multiple ingress ports, each one polices the matched traffic on each ingress port separately. Per interface statistics gathered for conformed/allowed traffic and exceeded/dropped traffic.
- When there is no policer configured within a class, all traffic is
transmitted without any policing. If there are any actions configured, the
configured actions are applied.
- conform-action (green): transmit (default).
- exceed-action (yellow): drop (default).
- violate-action (red): drop (default).
- The policer bucket is refilled at a sweeper period of 0.333 milliseconds, and the tokens in the policer bucket are renewed at 96ns time interval (Tc). This is applicable for all the platforms.
Steps to Configure ACL Policing
- Create a policy map.
- Create a class-map.
- Apply the policer to the policy map created.
- These commands configure the ACL policing for a policy
map.
switch#configure terminal switch(config)#policy-map [type qos] policy-name switch(config-pmap)#class { class-name } switch(config-pmap-c)#[no] police cir cir [{bps|kbps|mbps}] bc committed-burst-size [{bytes|kbytes|mbytes}] - These commands configure ACL policing in single-rate, two-color
mode.
switch(config)#class-map type qos match-any class1 switch(config-cmap-class1)#match ip access-group acl1 switch(config-cmap-class1)#exit switch(config)#policy-map type quality-of-service policy1 switch(config-pmap)#class class1 switch(config-pmap-c)#police cir 512000 bc 96000 switch(config-pmap-c)#exit switch(config-pmap)#
Displaying ACL Policing Information
- This command shows the contents of all policy maps on the
switch.
switch(config)#show policy-map Service-policy p Class-map: c (match-any) Match: ip access-group name a police rate 1000 mbps burst-size 100 bytes Class-map: class-default (match-any) Service-policy p Class-map: c (match-any) Match: ip access-group name a police rate 1000 mbps burst-size 100 bytes Class-map: class-default (match-any) - This command shows the interface-specific police counters for
interface Ethernet
1.
switch(config)#show policy-map interface Ethernet 1 input counters Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 96000 bytes Conformed 4351 packets, 1857386 bytes Conformed 2536 packets, 3384260 bytes Class-map: class-default (match-any) matched packets: 0 - This command shows the counters associated with the policy map called
p1.
switch(config)#show policy-map type qos p1 input counters Service-policy input: p1 Class-map: c1 (match-any) Match: ip access-group name a1 Police cir 512000 bps bc 96000 bytes Interface: Ethernet1 Conformed 4351 packets, 1857386 bytes Exceeded 2536 packets, 3384260 bytes Interface: Ethernet2 Conformed 2351 packets, 957386 bytes Exceeded 1536 packets, 1384260 bytes Class-map: class-default (match-any) Matched packets : 3229 -
This command shows the QoS policy map for interface Ethernet 1.
switch(config)#show policy-map interface Ethernet 1 input type qos Interface: Ethernet 1 Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 9000 bytes Class-map: class2 (match-any) Match: ip access-group name acl2 set dscp 2 Class-map: class3 (match-any) Match: ip access-group name acl3 Police cir 1280000 bps bc 9000 bytes Class-map: class-default (match-any)
Quality of Service (QoS) Profiles
QoS profiles are sets of QoS configuration instructions defined and applied at the interface level. A QoS profile serves the traffic better by reducing disorder in the running configuration. QoS profiles can modify all interface-level QoS configurations, and are supported on fabric, Ethernet, and port-channel interfaces. Control-plane policies cannot be applied using QoS profiles. Because configuration can be applied through QoS profiles or directly at the interface level, multiple configurations can be applied to the same interface. In such cases, QoS configurations with non-default values, whether configured through the CLI at the interface level or through a QoS profile, are given priority. In the case of multiple non-default values being configured, the interface-level CLI configuration is given priority.
Policy maps incorporating traffic resolution commands can also be applied by a QoS profile. If two policy maps are applied to the same interface (one through a QoS profile and another directly to the CLI).
IPv6 Flow Label Matches for QoS
Certain packets may include a flow label in their IPv6 headers when the source requests special handling by routers, such as for a media stream or other “real-time” service, among others. A flow consists of packets which share a single flow label, which is preserved throughout their passage from source to destination.
QoS policy map rules can match IPv6 traffic based on their flow labels. This requires a special TCAM profile (qos-match-ipv6-flow-label). These rules require either an exact match, using the “eq” operator, or both a label and a mask.
QoS Configuration: Platform-Independent Features
Creating QoS Profiles
QoS profiles are created by using the qos profile command. This also places the switch in QoS profile configuration mode, where the QoS parameters applied to interfaces are configured. To delete a QoS profile from the running configuration, use the no form of the command.
Example
switch(config)# qos profile Test-Profile
switch(config-qos-profile-Test-Profile)#Configuring QoS Profiles
The parameters that a QoS profile applies to interfaces are configured in QoS profile configuration mode by issuing the same QoS configuration commands that are available in interface configuration mode. QoS profile configuration mode is a group change mode, and changes made in the mode are not saved until the mode is exited. To abandon all changes made while in the mode, use the abort command.
Example
switch(config)# qos profile Test-Profile
switch(config-qos-profile-Test-Profile)# qos cos 3
switch(config-qos-profile-Test-Profile)# priority-flow-control on
switch(config-qos-profile-Test-Profile)# exit
switch(config)#switch(config)# qos profile Latency
switch(config-qos-profile-Latency)# tx-queue 3
switch(config-qos-profile-Latency)# latency maximum <1-50000> microseconds
switch(config-qos-profile-Latency)# latency maximum <1-50> milliseconds
switch(config-qos-profile-Latency)# exit
switch(config)#Attaching Policy-Map to a QoS Profile
The qos profile command places the switch in QoS profile configuration mode. The profile applies the QoS configurations to Ethernet and Port-Channel, and even to the Fabric interfaces, if it exists. A profile specifies the policy-map and other QoS supported configurations. The policy-map is then attached to the QoS profile using service-policy command.
Profiles are created in QoS-profile configuration mode, then applied to an interface in interface configuration mode.
- This command places the switch in QoS profile configuration mode, the policy-map is then
attached to the profile using
service-policy command
in this
mode.
switch(config)# qos profile TP switch(config-qos-profile-TP)# - This command applies the policy-map to the QoS
profile.
switch(config-qos-profile-TP)# service-policy type qos input PM-1
Applying a QoS profile on an Interface
The service-profile command applies a QoS profile to the configuration mode interface.
Example
switch(config)# interface ethernet 13
switch(config-if-Et13)# service-profile TPDisplaying the QoS Profile Information
The show qos profile command displays information about the QoS profiles configured and their parameters. To display the attribute of a specific profile, add the name of the profile. To display a list of configured QoS profiles and the interfaces on which they are configured, add the summary keyword.
- This command displays the configured profiles and their
configuration.
switch# show qos profile qos profile p qos cos 1 no priority-flow-control pause watchdog priority-flow-control priority 1 no-drop priority-flow-control priority 2 no-drop qos profile p2 qos cos 3 priority-flow-control priority 0 no-drop - This command displays the contents of a specific
profile.
switch# show qos profile p2 qos profile p2 qos cos 3 priority-flow-control priority 0 no-drop - This command displays the interfaces on which each profile is
applied.
switch# show qos profile summary Qos Profile: p Configured on: Et13,7 Fabric Po12 Qos Profile: p2 Configured on: Et56
QoS Configuration: Arad Platform Switches
- CoS and DSCP Port Settings – Arad Platform Switche
- Traffic Class Derivations – Arad Platform Switches
- CoS Rewrite – Arad Platform Switches
- Transmit Queues and Port Shaping – Arad Platform Switches
- ECN Configuration – Arad Platform Switches
- ACL Policing – Arad Platform Switches
CoS and DSCP Port Settings – Arad Platform Switches
Port Settings – Trust Mode and Traffic Class describes port trust and default port CoS and DSCP values.
Configuring Port Trust Settings
- qos trust cos specifies CoS as the port’s port-trust mode.
- qos trust dscp specifies DSCP as the port’s port-trust mode.
- no qos trust specifies untrusted as the port’s port-trust mode.
The show qos interfaces trust command displays the trust mode of specified interfaces.
Example
- Ethernet 3/5/1: dscp
- Ethernet 3/5/2: untrusted
- Ethernet 3/5/3: cos
- Ethernet 3/5/4: default as a switched port
- Ethernet 3/6/1:
default as a routed
port
switch(config)# interface ethernet 3/5/1 switch(config-if-Et3/5/1)# qos trust dscp switch(config-if-Et3/5/1)# interface ethernet 3/5/2 switch(config-if-Et3/5/2)# no qos trust switch(config-if-Et3/5/2)# interface ethernet 3/5/3 switch(config-if-Et3/5/3)# qos trust cos switch(config-if-Et3/5/3)# interface ethernet 3/5/4 switch(config-if-Et3/5/4)# switchport switch(config-if-Et3/5/4)# default qos trust switch(config-if-Et3/5/4)# interface ethernet 3/6/1 switch(config-if-Et3/6/1)# no switchport switch(config-if-Et3/6/1)# default qos trust switch(config-if-Et3/6/1) #show qos interface ethernet 3/5/1 - 3/6/1 trust Port Trust Mode Operational Configured --------------------------------------------------------------- Ethernet3/5/1 DSCP DSCP Ethernet3/5/2 UNTRUSTED UNTRUSTED Ethernet3/5/3 COS COS Ethernet3/5/4 COS DEFAULT Ethernet3/6/1 DSCP DEFAULT switch(config-if-Et3/6/1)#
Configuring Default Port Settings
Example
These commands configure default CoS (4) and DSCP (44) values on Ethernet interface 3/6/2.
switch(config)# interface ethernet 3/6/2
switch(config-if-Et3/6/2)# qos cos 4
switch(config-if-Et3/6/2)# qos dscp 44
switch(config-if-Et3/6/2)# show active
interface Ethernet3/6/2
qos cos 4
qos dscp 44
switch(config-if-Et3/6/2)# show qos interfaces ethernet 3/6/2
Ethernet3/6/2:
Trust Mode: COS
Default COS: 4
Default DSCP: 44
switch(config-if-Et3/6/2)#Traffic Class Derivations – Arad Platform Switches
Traffic Classesdescribes traffic classes.
Traffic Class Derivation Source
| Untrusted | CoS Trusted | DSCP Trusted | |
| Untagged Non-IP | Default CoS (port) | Default CoS (port) | Default DSCP (port) |
| Untagged IP | Default CoS (port) | Default CoS (port) | DSCP (packet) |
| Tagged Non-IP | Default CoS (port) | CoS (packet) | Default DSCP (port) |
| Tagged IP | Default CoS (port) | CoS (packet) | DSCP (packet) |
CoS and DSCP Port Settings – Arad Platform Switchesdescribes the default CoS and DSCP settings for each port.
Mapping CoS to Traffic Class
The qos map cos command assigns a traffic class to a list of CoS values. Multiple commands create a complete CoS to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the chip upon which it is received.
Example
switch(config)# qos map cos 1 3 5 7 to traffic-class 5
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 5 2 5 4 5 6 5
switch(config)#The following table displays the default CoS to Traffic Class map on Arad platform switches.
| Inbound CoS | Untagged | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class | Derived: use default CoS as inbound | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping DSCP to Traffic Class
The qos map dscp command assigns a traffic class to a set of DSCP values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
Example
switch(config)# qos map dscp 12 24 41 44 45 46 47 to traffic-class 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 0 0 0 0 2 2 2 2
2 : 2 2 2 2 0 3 3 3 3 3
3 : 3 3 4 4 4 4 4 4 4 4
4 : 5 0 5 5 0 0 0 0 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch(config)#The following table displays the default DSCP to traffic class map on Arad platform switches.
| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
CoS Rewrite – Arad Platform Switches
Rewriting CoS and DSCP describes the CoS rewrite functions.
Traffic Class to CoS Rewrite Map
The CoS rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-CoS rewrite map. The qos map traffic-class to cos command assigns a CoS rewrite value to a list of traffic classes. Multiple commands create the complete traffic class–CoS rewrite map.
Example
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc-cos map:
tc: 0 1 2 3 4 5 6 7
----------------------------
cos: 1 2 2 2 4 2 6 7
switch(config)#The following table displays the default Traffic Class to CoS rewrite value map on Arad platform switches.
|
Traffic Class |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|
CoS Rewrite Value |
1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Traffic Class to DSCP Rewrite Map
DSCP rewrite is always disabled on Arad platform switches.
Transmit Queues and Port Shaping – Arad Platform Switches
Transmit Queues and Port Shaping describes transmit queues and port shaping.
Arad platform switches provide 16 physical queues for each egress port: eight unicast and eight multicast queues. Data is scheduled to the physical queues based on transmit queue assignments.
Multicast queue capacity that remains after multicast traffic is serviced is available for unicast traffic of a corresponding priority. Similarly, unicast queue capacity that remains after unicast traffic is serviced is available for overflow multicast traffic. Under conditions of unicast and multicast congestion, egress traffic is evenly split between unicast and multicast traffic.
A data stream’s traffic class determines the transmit queue it uses. The switch defines a single traffic class–transmit queue map for unicast and multicast traffic on all Ethernet and port channel interfaces. The show qos maps command displays the traffic class–transmit queue map.
The following tabledisplays the default traffic class to transmit queue map on Arad platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Transmit queue parameters are configured in tx-queue configuration command mode, which is entered from interface-ethernet configuration mode.
Mapping Traffic Classes to a Transmit Queue
The qos map traffic-class to tx-queue command assigns traffic classes to a transmit queue. Multiple commands complete the traffic class-transmit queue map. Traffic class 7 and transmit queue 7 are always mapped to each other. This association is not editable.
Example
switch(config)# qos map traffic-class 1 3 5 to tx-queue 1
switch(config)# qos map traffic-class 2 4 6 to tx-queue 2
switch(config)# qos map traffic-class 0 to tx-queue 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 1 2 1 2 7
switch(config)#Entering Tx-Queue Configuration Mode
The tx-queue (Arad/Jericho) command places the switch in tx-queue configuration mode to configure a transmit queue on the configuration mode interface. Tx-queue 7 is not configurable. The show qos interfaces displays the transmit queue configuration for a specified port.
Example
switch(config)# interface ethernet 3/3/3
switch(config-if-Et3/3/3)# tx-queue 4
switch(config-if-Et3/3/3-txq-4)#Configuring the Shape Rate – Port and Transmit Queues
- To configure a port’s shape rate, enter shape rate (Interface – Arad/Jericho) from the port’s interface configuration mode.
- To configure a transmit queue’s shape rate, enter shape rate (Tx-queue – Arad/Jericho) from the queue’s tx-queue configuration mode.
- This command configures a port shape rate of 5
Gbps on interface Ethernet
3/5/1.
switch(config)# interface ethernet 3/5/1 switch(config-if-Et3/5/1)# shape rate 5000000 switch(config-if-Et3/5/1)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Port shaping rate: 5000012 / 5000000 kbps Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D switch(config-if-Et3/5/1)# - These commands configure a shape rate of 1 Gbps on
transmit queues 3 and 4
of interface Ethernet
3/4/1.
switch(config)# interface ethernet 3/4/1 switch(config-if-Et3/4/1)# tx-queue 4 switch(config-if-Et3/4/1-txq-4)# shape rate 1000000 kbps switch(config-if-Et3/4/1-txq-4)# tx-queue 3 switch(config-if-Et3/4/1-txq-3)# shape rate 1000000 kbps switch(config-if-Et3/4/1-txq-3)# show qos interface ethernet 3/4/1 Ethernet3/4/1: Port shaping rate: disabled Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - 999 / 1000 ( Mbps ) SP / SP D 3 - / - 999 / 1000 ( Mbps ) SP / SP D 2 - / - - / - ( - ) SP / SP D 1 - / - - / - ( - ) SP / SP D 0 - / - - / - ( - ) SP / SP D switch(config-if-Et3/4/1-txq-3)#
Configuring Queue Priority
- The priority strict command configures the queue as a strict priority queue.
- The no priority command configures the queue as a round robin queue.
A queue’s configuration as round robin also applies to all lower priority queues regardless of other configuration statements.
The bandwidth percent (Arad/Jericho) command configures a round robin queue’s bandwidth share. The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
- These commands configure queues 0 through 3 (interface Ethernet 3/5/1) as round robin, then allocate bandwidth for three queues at 30% and one queue at 10%.The no priority statement for queue 3 also configures queues 0, 1, and 2 as round robin queues. Removing this statement reverts the other queues to strict priority type unless running-config contains a no priority statement for one of these queues.
switch(config)# interface ethernet 3/5/1 switch(config-if-Et3/5/1)# tx-queue 3 switch(config-if-Et3/5/1-txq-3)# no priority switch(config-if-Et3/5/1-txq-3)# bandwidth percent 10 switch(config-if-Et3/5/1-txq-3)# tx-queue 2 switch(config-if-Et3/5/1-txq-2)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-2)# tx-queue 1 switch(config-if-Et3/5/1-txq-1)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-1)# tx-queue 0 switch(config-if-Et3/5/1-txq-0)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-0)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 10 / 10 - / - ( - ) RR / RR D 2 30 / 30 - / - ( - ) RR / SP D 1 30 / 30 - / - ( - ) RR / SP D 0 30 / 30 - / - ( - ) RR / SP D switch(config-if-Et3/5/1-txq-0)# - Changing the bandwidth percentage for queue 3 to
30 changes the operational bandwidth of
each queue to its configured bandwidth divided by
120%
(10%+20%+30%+60%).
switch(config-if-Et3/5/1-txq-0)# tx-queue 3 switch(config-if-Et3/5/1-txq-3)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-3)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Port shaping rate: disabled Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 24 / 30 - / - ( - ) RR / RR D 2 24 / 30 - / - ( - ) RR / SP D 1 24 / 30 - / - ( - ) RR / SP D 0 24 / 30 - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured switch(config-if-Et3/5/1-txq-3)#
ECN Configuration – Arad Platform Switches
Explicit Congestion Notification (ECN) describes Explicit Congestion Notification (ECN).
ECN is independently configurable on all egress queues of each Ethernet interface. ECN settings for Port-Channels are applied on each of the channel’s member Ethernet interfaces. Average queue length is tracked for transmit queues. When it reaches maximum threshold, all subsequent packets are marked.
Although the switch does not limit the number of queues that can be configured for ECN, hardware table limitations restrict the number of queues that can simultaneously implement ECN.
The random-detect ecn (Arad/Jericho) command enables ECN marking for the configuration mode unicast transmit queue and specifies threshold queue sizes.
Example
switch(config)# interface ethernet 3/5/1
switch(config-if-Et3/5/1)# tx-queue 4
switch(config-if-Et3/5/1-txq-4)# random-detect ecn minimum-threshold 128 kbytes maximum-threshold 1280 kbyte
switch(config-if-Et3/5/1-txq-4)# show active
interface Ethernet3/5/1
tx-queue 4
random-detect ecn minimum-threshold 128 kbytes maximum-threshold 1280 kbytes
switch(config-if-Et3/5/1-txq-4)#ACL Policing – Arad Platform Switches
ACL Policing describes ACL policing.
- policy-map settings.
- class-name.
- committed information rate (CIR) the data speed committed to any given circuit regardless of the number of users.
- burst size the maximum burst size in bytes the network commits to moving under normal conditions.
The default unit for the metering rate CIR is bits per second; the default unit for the burst size is bytes.
The policer is applied to the class inside the policy map. Policy maps can contain one or more policy map classes, each with different match criteria and policer.
- Policy map can be applied on multiple interfaces. Interfaces on the same chip will share the policer. (Applicable for Arad only.)
- If there is no policer configured within a class, all traffic is transmitted without any policing.
- If there are any actions configured, the configured actions are
applied:
- Conform-action (green): transmit (default).
- Violate-action (red): drop (default).
Example
switch(config)# class-map type qos match-any class1
switch(config-cmap-class1)# match ip access-group acl1
switch(config-cmap-class1)# exit
switch(config)# policy-map type quality-of-service policy1
switch(config-policy1)# class class1
switch(config-policy1-class1)# police cir 512000 bc 96000
switch(config-policy1-class1)# exit
switch(config-policy1)# exit
switch(config)#Displaying ACL Policing Information
Examples
- This command shows the contents of all policy maps on the
switch.
switch(config)# show policy-map Service-policy policy1 Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 96000 bytes Class-map: class-default (match-any) switch(config)# - This command shows the interface-specific police counters for
interface Ethernet
1.
switch(config)# show policy-map interface Ethernet 1 input counters Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 96000 bytes Conformed 4351 packets, 1857386 bytes Conformed 2536 packets, 3384260 bytes Class-map: class-default (match-any) matched packets: 0 switch(config)# - This command shows the counters associated with the policy map
called
p1.
switch(config)# show policy-map type qos p1 input counters Service-policy input: p1 Class-map: c1 (match-any) Match: ip access-group name a1 Police cir 512000 bps bc 96000 bytes Interface: Ethernet1 Conformed 4351 packets, 1857386 bytes Exceeded 2536 packets, 3384260 bytes Interface: Ethernet2 Conformed 2351 packets, 957386 bytes Exceeded 1536 packets, 1384260 bytes Class-map: class-default (match-any) Matched packets : 3229 switch(config)# - This command shows the QoS policy map for interface
Ethernet
1.
switch(config)# show policy-map interface Ethernet 1 input type qos Interface: Ethernet 1 Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 9000 bytes Class-map: class2 (match-any) Match: ip access-group name acl2 set dscp 2 Class-map: class3 (match-any) Match: ip access-group name acl3 Police cir 1280000 bps bc 9000 bytes Class-map: class-default (match-any) switch(config)#
QoS Configuration: Jericho Platform Switches
- CoS and DSCP Port Settings – Jericho Platform Switches
- Traffic Class Derivations – Jericho Platform Switches
- CoS Rewrite – Jericho Platform Switches
- Transmit Queues and Port Shaping – Jericho Platform Switches
- ACL Policing
– Jericho Platform SwitchesNote: QoS traffic policy is supported on Trident and Tomahawk, Trident II, FM6000, Arad. and Jericho.
CoS and DSCP Port Settings – Jericho Platform Switches
Port Settings – Trust Mode and Traffic Class describes port trust and default port CoS and DSCP values.
Configuring Port Trust Settings
- qos trust cos specifies CoS as the port’s port-trust mode.
- qos trust dscp specifies DSCP as the port’s port-trust mode.
- no qos trust specifies untrusted as the port’s port-trust mode.
The show qos interfaces trust command displays the trust mode of specified interfaces.
Example
- Ethernet 3/5/2: untrusted.
- Ethernet 3/5/3: cos.
- Ethernet 3/5/4: default as a switched port.
- Ethernet 3/6/1: default as a routed port.
switch(config)# interface ethernet 3/5/1
switch(config-if-Et3/5/1)# qos trust dscp
switch(config-if-Et3/5/1)# interface ethernet 3/5/2
switch(config-if-Et3/5/2)# no qos trust
switch(config-if-Et3/5/2)# interface ethernet 3/5/3
switch(config-if-Et3/5/3)# qos trust cos
switch(config-if-Et3/5/3)# interface ethernet 3/5/4
switch(config-if-Et3/5/4)# switchport
switch(config-if-Et3/5/4)# default qos trust
switch(config-if-Et3/5/4)# interface ethernet 3/6/1
switch(config-if-Et3/6/1)# no switchport
switch(config-if-Et3/6/1)# default qos trust
switch(config-if-Et3/6/1)# show qos interface ethernet 3/5/1 - 3/6/1 trust
Port Trust Mode
Operational Configured
---------------------------------------------------------------
Ethernet3/5/1 DSCP DSCP
Ethernet3/5/2 UNTRUSTED UNTRUSTED
Ethernet3/5/3 COS COS
Ethernet3/5/4 COS DEFAULT
Ethernet3/6/1 DSCP DEFAULT
switch(config-if-Et3/6/1)#Configuring Default Port Settings
Example
switch(config)# interface ethernet 3/6/2
switch(config-if-Et3/6/2)# qos cos 4
switch(config-if-Et3/6/2)# qos dscp 44
switch(config-if-Et3/6/2)# show active
interface Ethernet3/6/2
qos cos 4
qos dscp 44
switch(config-if-Et3/6/2)# show qos interfaces ethernet 3/6/2
Ethernet3/6/2:
Trust Mode: COS
Default COS: 4
Default DSCP: 44
switch(config-if-Et3/6/2)#Traffic Class Derivations – Jericho Platform Switches
Traffic Classes describes traffic classes.
Traffic Class Derivation Source
The following table displays the source for deriving a data stream’s traffic class on Jericho platform switches.
| Untrusted | CoS Trusted | DSCP Trusted | |
| Untagged Non-IP | Default CoS (port) | Default CoS (port) | Default DSCP (port) |
| Untagged IP | Default CoS (port) | Default CoS (port) | DSCP (packet) |
| Tagged Non-IP | Default CoS (port) | CoS (packet) | Default DSCP (port) |
| Tagged IP | Default CoS (port) | CoS (packet) | DSCP (packet) |
CoS and DSCP Port Settings – Arad Platform Switches describes the default CoS and DSCP settings for each port.
Mapping CoS to Traffic Class
The qos map cos command assigns a traffic class to a list of CoS values. Multiple commands create a complete CoS to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the chip upon which it is received.
switch(config)# qos map cos 1 3 5 7 to traffic-class 5
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 5 2 5 4 5 6 5
switch(config)#The following table displays the default CoS to Traffic Class map on Jericho platform switches.
| Inbound CoS | Untagged | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class | Derived: use default CoS as inbound | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping DSCP to Traffic Class
The qos map dscp command assigns a traffic class to a set of DSCP values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
switch(config)# qos map dscp 12 24 41 44 45 46 47 to traffic-class 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 0 0 0 0 2 2 2 2
2 : 2 2 2 2 0 3 3 3 3 3
3 : 3 3 4 4 4 4 4 4 4 4
4 : 5 0 5 5 0 0 0 0 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch(config)#The following table displays the default DSCP to traffic class map on Jericho platform switches.
| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
CoS Rewrite – Jericho Platform Switches
Rewriting CoS and DSCPdescribes the CoS rewrite functions.
Traffic Class to CoS Rewrite Map
The CoS rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-CoS rewrite map. The qos map traffic-class to cos command assigns a CoS rewrite value to a list of traffic classes. Multiple commands create the complete traffic class–CoS rewrite map.
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc-cos map:
tc: 0 1 2 3 4 5 6 7
----------------------------
cos: 1 2 2 2 4 2 6 7
switch(config)#The following table displays the default Traffic Class to CoS rewrite value map on Jericho platform switches.
|
Traffic Class |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|
CoS Rewrite Value |
1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Traffic Class to DSCP Rewrite Map
DSCP rewrite is always disabled on Jericho platform switches.
Transmit Queues and Port Shaping – Jericho Platform Switches
Transmit Queues and Port Shapingdescribes transmit queues and port shaping.
Jericho platform switches provide 16 physical queues for each egress port: eight unicast and eight multicast queues. Data is scheduled to the physical queues based on transmit queue assignments.
Multicast queue capacity that remains after multicast traffic is serviced is available for unicast traffic of a corresponding priority. Similarly, unicast queue capacity that remains after unicast traffic is serviced is available for overflow multicast traffic. Under conditions of unicast and multicast congestion, egress traffic is evenly split between unicast and multicast traffic.
A data stream’s traffic class determines the transmit queue it uses. The switch defines a single traffic class–transmit queue map for unicast and multicast traffic on all Ethernet and port channel interfaces. The show qos maps command displays the traffic class–transmit queue map.
The following table displays the default traffic class to transmit queue map on Jericho platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Transmit queue parameters are configured in tx-queue configuration command mode, which is entered from interface-ethernet configuration mode.
Mapping Traffic Classes to a Transmit Queue
The qos map traffic-class to tx-queue command assigns traffic classes to a transmit queue. Multiple commands complete the traffic class-transmit queue map. Traffic class 7 and transmit queue 7 are always mapped to each other. This association is not editable.
switch(config)# qos map traffic-class 1 3 5 to tx-queue 1
switch(config)# qos map traffic-class 2 4 6 to tx-queue 2
switch(config)# qos map traffic-class 0 to tx-queue 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 1 2 1 2 7
switch(config)#Entering Tx-Queue Configuration Mode
The tx-queue (Arad/Jericho) command places the switch in tx-queue configuration mode to configure a transmit queue on the configuration mode interface. Tx-queue 7 is not configurable. The show qos interfaces displays the transmit queue configuration for a specified port.
switch(config)# interface ethernet 3/3/3
switch(config-if-Et3/3/3)# tx-queue 4
switch(config-if-Et3/3/3-txq-4)# Configuring the Shape Rate – Port and Transmit Queues
- To configure a port’s shape rate, enter shape rate (Interface – Arad/Jericho) from the port’s interface configuration mode.
- To configure a transmit queue’s shape rate, enter shape rate (Tx-queue – Arad/Jericho) from the queue’s tx-queue configuration mode.
- This command configures a port shape rate of 5
Gbps on interface ethernet
3/5/1.
switch(config)# interface ethernet 3/5/1 switch(config-if-Et3/5/1)# shape rate 5000000 switch(config-if-Et3/5/1)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Port shaping rate: 5000012 / 5000000 kbps Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D switch(config-if-Et3/5/1)# - These commands configure a shape rate of 1 Gbps on
transmit queues 3 and 4
on interface ethernet
3/4/1.
switch(config)# interface ethernet 3/4/1 switch(config-if-Et3/4/1)# tx-queue 4 switch(config-if-Et3/4/1-txq-4)# shape rate 1000000 kbps switch(config-if-Et3/4/1-txq-4)# tx-queue 3 switch(config-if-Et3/4/1-txq-3)# shape rate 1000000 kbps switch(config-if-Et3/4/1-txq-3)# show qos interface ethernet 3/4/1 Ethernet3/4/1: Port shaping rate: disabled Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - 999 / 1000 ( Mbps ) SP / SP D 3 - / - 999 / 1000 ( Mbps ) SP / SP D 2 - / - - / - ( - ) SP / SP D 1 - / - - / - ( - ) SP / SP D 0 - / - - / - ( - ) SP / SP D switch(config-if-Et3/4/1-txq-3)#
Configuring Queue Priority
- The priority strict command configures the queue as a strict priority queue.
- The no priority command configures the queue as a round robin queue.
A queue’s configuration as round robin also applies to all lower priority queues regardless of other configuration statements.
The bandwidth percent (Arad/Jericho) command configures a round robin queue’s bandwidth share. The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
- These commands configure queues 0 through
3 (interface ethernet
3/5/1) as round robin, then allocate bandwidth for
three queues at 30% and one queue at
10%.The no priority statement for queue 3 also configures queues 0, 1, and 2 as round robin queues. Removing this statement reverts the other queues to strict priority type unless running-config contains a no priority statement for one of these queues.
switch(config)# interface ethernet 3/5/1 switch(config-if-Et3/5/1)# tx-queue 3 switch(config-if-Et3/5/1-txq-3)# no priority switch(config-if-Et3/5/1-txq-3)# bandwidth percent 10 switch(config-if-Et3/5/1-txq-3)# tx-queue 2 switch(config-if-Et3/5/1-txq-2)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-2)# tx-queue 1 switch(config-if-Et3/5/1-txq-1)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-1)# tx-queue 0 switch(config-if-Et3/5/1-txq-0)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-0)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 10 / 10 - / - ( - ) RR / RR D 2 30 / 30 - / - ( - ) RR / SP D 1 30 / 30 - / - ( - ) RR / SP D 0 30 / 30 - / - ( - ) RR / SP D switch(config-if-Et3/5/1-txq-0)# - Changing the bandwidth percentage for queue 3 to
30 changes the operational bandwidth of
each queue to its configured bandwidth divided by
120%
(10%+20%+30%+60%).
switch(config-if-Et3/5/1-txq-0)# tx-queue 3 switch(config-if-Et3/5/1-txq-3)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-3)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Port shaping rate: disabled Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 24 / 30 - / - ( - ) RR / RR D 2 24 / 30 - / - ( - ) RR / SP D 1 24 / 30 - / - ( - ) RR / SP D 0 24 / 30 - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured switch(config-if-Et3/5/1-txq-3)#
ACL Policing – Jericho Platform Switches
ACL Policingdescribes ACL policing.
- policy-map settings.
- class-name.
- committed information rate (CIR) the data speed committed to any given circuit regardless of the number of users.
- burst size the maximum burst size in bytes the network commits to moving under normal conditions.
The default unit for the metering rate CIR is bits per second; the default unit for the burst size is bytes.
The policer is applied to the class inside the policy map. Policy maps can contain one or more policy map classes, each with different match criteria and policer.
- Policy map can be applied on multiple interfaces. Interfaces on the same chip will share the policer. (Applicable for Arad and Jericho only.)
- If there is no policer configured within a class, all traffic is transmitted without any policing.
- If there are any actions configured, the configured actions are
applied:
- Conform-action (green): transmit (default).
- Violate-action (red): drop (default).
Example
switch(config)# class-map type qos match-any class1
switch(config-cmap-class1)# match ip access-group acl1
switch(config-cmap-class1)# exit
switch(config)# policy-map type quality-of-service policy1
switch(config-policy1)# class class1
switch(config-policy1-class1)# police cir 512000 bc 96000
switch(config-policy1-class1)# exit
switch(config-policy1)# exit
switch(config)#Displaying ACL Policing Information
Examples
- This command shows the contents of all policy maps on the
switch.
switch(config)# show policy-map Service-policy policy1 Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 96000 bytes Class-map: class-default (match-any) switch(config)# - This command shows the interface-specific police counters for
interface ethernet
1.
switch(config)# show policy-map interface Ethernet 1 input counters Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 96000 bytes Conformed 4351 packets, 1857386 bytes Conformed 2536 packets, 3384260 bytes Class-map: class-default (match-any) matched packets: 0 switch(config)# - This command shows the counters associated with the policy map
called
p1.
switch(config)# show policy-map type qos p1 input counters Service-policy input: p1 Class-map: c1 (match-any) Match: ip access-group name a1 Police cir 512000 bps bc 96000 bytes Interface: Ethernet1 Conformed 4351 packets, 1857386 bytes Exceeded 2536 packets, 3384260 bytes Interface: Ethernet2 Conformed 2351 packets, 957386 bytes Exceeded 1536 packets, 1384260 bytes Class-map: class-default (match-any) Matched packets : 3229 switch(config)# - This command shows the QoS policy map for interface
ethernet
1.
switch(config)# show policy-map interface Ethernet 1 input type qos Interface: Ethernet 1 Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 9000 bytes Class-map: class2 (match-any) Match: ip access-group name acl2 set dscp 2 Class-map: class3 (match-any) Match: ip access-group name acl3 Police cir 1280000 bps bc 9000 bytes Class-map: class-default (match-any) switch(config)#
QoS Configuration: FM6000 Platform Switches
CoS and DSCP Port Settings – FM6000 Platform Switches
Port Settings – Trust Mode and Traffic Class describes port trust and default port CoS and DSCP values.
Configuring Port Trust Settings
- qos trust cos specifies cos as the port’s port-trust mode.
- qos trust dscp specifies dscp as the port’s port-trust mode.
- no qos trust specifies untrusted as the port’s port-trust mode.
The show qos interfaces trust command displays the trust mode of specified interfaces.
Example
- Ethernet 15: dscp.
- Ethernet 16: untrusted.
- Ethernet 17: cos.
- Ethernet 18: default as a switched port.
- Ethernet 19:
default as a routed
port.
switch(config)# interface ethernet 15 switch(config-if-Et15)# qos trust dscp switch(config-if-Et15)# interface ethernet 16 switch(config-if-Et16)# no qos trust switch(config-if-Et16)# interface ethernet 17 switch(config-if-Et17)# qos trust cos switch(config-if-Et17)# interface ethernet 18 switch(config-if-Et18)# switchport switch(config-if-Et18)# default qos trust switch(config-if-Et19)# interface ethernet 19 switch(config-if-Et19)# no switchport switch(config-if-Et19)# default qos trust switch(config-if-Et19)# show qos interface ethernet 15 - 19 trust Port Trust Mode Operational Configured --------------------------------------------------------------- Ethernet15 DSCP DSCP Ethernet16 UNTRUSTED UNTRUSTED Ethernet17 COS COS Ethernet18 COS DEFAULT Ethernet19 DSCP DEFAULT switch(config-if-Et19)#
Configuring Default Port Settings
Example
switch(config)# interface ethernet 19
switch(config-if-Et19)# qos cos 4
switch(config-if-Et19)# qos dscp 44
switch(config-if-Et19)# show active
interface Ethernet19
qos cos 4
qos dscp 44
switch(config-if-Et19)# show qos interfaces ethernet 19
Ethernet19:
Trust Mode: COS
Default COS: 4
Default DSCP: 44
switch(config-if-Et19)#Traffic Class Derivations – FM6000 Platform Switches
Traffic Classesdescribes traffic classes.
Traffic Class Derivation Source
The following table displays the source for deriving a data stream’s traffic class.
| Untrusted | CoS Trusted | DSCP Trusted | |
| Untagged Non-IP | Default CoS (port) | Default CoS (port) | Default DSCP (port) |
| Untagged IP | Default CoS (port) | Default CoS (port) | DSCP (packet) |
| Tagged Non-IP | Default CoS (port) | CoS (packet) | Default DSCP (port) |
| Tagged IP | Default CoS (port) | CoS (packet) | DSCP (packet) |
CoS and DSCP Port Settings – FM6000 Platform Switchesdescribes the default CoS and DSCP settings for each port.
Mapping CoS to Traffic Class
The qos map cos command assigns a traffic class to a list of CoS settings. Multiple commands create a complete CoS to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the port upon which it is received.
Example
switch(config)# qos map cos 1 3 5 7 to traffic-class 5
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 5 2 5 4 5 6 5
switch(config)#| Inbound CoS | Untagged | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping DSCP to Traffic Class
The qos map dscp command assigns a traffic class to a set of DSCP values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
Example
switch(config)# qos map dscp 12 13 25 37 to traffic-class 3
switch(config)# show qos map
Number of Traffic Classes supported: 8
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 3 3 0 0 2 2 2 2
2 : 2 2 2 2 3 3 3 3 3 3
3 : 3 3 4 4 4 4 4 3 4 4
4 : 5 5 5 5 5 5 5 5 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch(config)#| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
CoS and DSCP Rewrite – FM6000 Platform Switches
Rewriting CoS and DSCP describes the CoS and DSCP rewrite functions.
Traffic Class to CoS Rewrite Map
The CoS rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-CoS rewrite map. The qos map traffic-class to cos command assigns a CoS rewrite value to a list of traffic classes. Multiple commands create the complete traffic class–CoS rewrite map.
Example
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 3 4 5 6 7
switch(config)#|
Traffic Class |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
CoS Rewrite Value |
1 |
0 |
2 |
3 |
4 |
5 |
6 |
7 |
Traffic Class to DSCP Rewrite Map
The DSCP rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-DSCP rewrite map. The qos map traffic-class to dscp command assigns a DSCP rewrite value to a list of traffic classes. Multiple commands create the complete traffic class-DSCP rewrite map.
Example
switch(config)# qos map traffic-class 2 4 6 to dscp 37
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc-dscp map:
tc: 0 1 2 3 4 5 6 7
-----------------------------
dscp: 8 0 37 24 37 40 37 56
switch(config)#The following table displays the default traffic class–DSCP rewrite map on on FM6000 platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| DSCP Rewrite Value | 8 | 0 | 16 | 24 | 32 | 40 | 48 | 56 |
Transmit Queues and Port Shaping – FM6000 Platform Switches
Transmit Queues and Port Shaping describes transmit queues and port shaping.
A data stream’s traffic class determines the transmit queue it uses. The switch defines a single traffic class-transmit queue map for all Ethernet and port channel interfaces and is used for unicast and multicast traffic. The show qos maps command displays the traffic class to transmit queue map.
The following table displays the default traffic class to transmit queue map on FM6000 platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping Traffic Classes to a Transmit Queue
The qos map traffic-class to tx-queue command assigns traffic classes to a transmit queue. Multiple commands create the complete map.
Example
switch(config)# qos map traffic-class 1 3 5 to tx-queue 1
switch(config)# qos map traffic-class 2 4 6 to tx-queue 2
switch(config)# qos map traffic-class 0 to tx-queue 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 1 2 1 2 7
switch(config)#Entering TX-Queue Configuration Mode
Transmit queues are configurable on Ethernet ports and port channels. Queue parameters are configured in tx-queue configuration command mode, which is entered from interface ethernet configuration mode. The tx-queue (FM6000) command places the switch in tx-queue configuration mode. The show qos interfaces displays the transmit queue configuration for a specified port.
Example
switch(config)# interface ethernet 5
switch(config-if-Et5)# tx-queue 3
switch(config-if-Et5-txq-3)#Configuring the Shape Rate – Port and Transmit Queues
- To configure a port’s shape rate, enter shape rate (Interface – FM6000) from the port’s interface configuration mode.
- To configure a transmit queue’s shape rate, enter shape rate (Tx-queue – FM6000) from the queue’s tx-queue configuration mode.
Example
-
- transmit queues 0, 1, and 2: 500 Mbps.
-
transmit queues 3, 4, and 5: 400 Mbps.
switch(config)# interface ethernet 3 switch(config-if-Et3)# shape rate 5000000 switch(config-if-Et3)# tx-queue 0 switch(config-if-Et3-txq-0)# shape rate 500000 switch(config-if-Et3-txq-0)# tx-queue 1 switch(config-if-Et3-txq-1)# shape rate 500000 switch(config-if-Et3-txq-1)# tx-queue 3 switch(config-if-Et3-txq-3)# shape rate 400000 switch(config-if-Et3-txq-3)# tx-queue 4 switch(config-if-Et3-txq-4)# shape rate 400000 switch(config-if-Et3-txq-4)# tx-queue 5 switch(config-if-Et3-txq-5)# shape rate 400000 switch(config-if-Et3-txq-5)# exit switch(config-if-Et3)# show qos interface ethernet 3 Ethernet3: Port shaping rate: 5000000Kbps Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A 400000 strict 4 N/A 400000 strict 3 N/A 400000 strict 2 N/A disabled strict 1 N/A 500000 strict 0 N/A 500000 strict switch(config-if-Et3)#
Configuring Queue Priority
- priority strict configures the queue as a strict priority queue.
- no priority configures the queue as a round robin queue.
A queue’s configuration as round robin also applies to all lower priority queues regardless of other configuration statements.
The bandwidth percent (FM6000) command configures a round robin queue’s bandwidth share. The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
- These commands configure transmit queue 3 (on interface Ethernet 19) as a round robin queue, then allocates 10%, 20%, 30%, and 40% bandwidth to queues 0 through 3.The no priority statement for queue 3 also configures queues 0, 1, and 2 as round robin queues. Removing this statement reverts the other queues to strict priority type unless running-config contains a no priority statement for one of these queues.
switch(config)# interface ethernet 19 switch(config-if-Et19)# tx-queue 3 switch(config-if-Et19-txq-3)# no priority switch(config-if-Et19-txq-3)# bandwidth percent 40 switch(config-if-Et19-txq-3)# tx-queue 2 switch(config-if-Et19-txq-2)# bandwidth percent 30 switch(config-if-Et19-txq-2)# tx-queue 1 switch(config-if-Et19-txq-1)# bandwidth percent 20 switch(config-if-Et19-txq-1)# tx-queue 0 switch(config-if-Et19-txq-0)# bandwidth percent 10 switch(config-if-Et19-txq-0)# show qos interface ethernet 19 Ethernet19: Port shaping rate: disabled Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 40 disabled round-robin 2 30 disabled round-robin 1 20 disabled round-robin 0 10 disabled round-robin switch(config-if-Et19-txq-0)# - Changing the bandwidth percentage for queue 3 to
60 changes the operational bandwidth of
each queue to its configured bandwidth divided by
120%
(10%+20%+30%+60%).
switch(config-if-Et19-txq-0) #tx-queue 3 switch(config-if-Et19-txq-3)# bandwidth percent 60 switch(config-if-Et19-txq-3)# show qos interface ethernet 19 Ethernet19: Port shaping rate: disabled Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 49 disabled round-robin 2 24 disabled round-robin 1 16 disabled round-robin 0 8 disabled round-robin switch(config-if-Et19-txq-3)#
QoS Configuration: Petra Platform Switches
CoS and DSCP Port Settings – Petra Platform Switches
Port Settings – Trust Mode and Traffic Classdescribes port trust and default port CoS and DSCP values.
Configuring Port Trust Settings
- qos trust cos specifies cos as the port’s port-trust mode.
- qos trust dscp specifies dscp as the port’s port-trust mode.
- no qos trust specifies untrusted as the port’s port-trust mode.
The show qos interfaces trust command displays the trust mode of specified interfaces.
Example
- Ethernet 3/25: dscp.
- Ethernet 3/26: untrusted.
- Ethernet 3/27: cos.
- Ethernet 3/28: default as a switched port.
- Ethernet 3/29:
default as a routed
port.
switch(config)# interface ethernet 3/25 switch(config-if-Et3/25)# qos trust dscp switch(config-if-Et3/25)# interface ethernet 3/26 switch(config-if-Et3/26)# no qos trust switch(config-if-Et3/26)# interface ethernet 3/27 switch(config-if-Et3/27)# qos trust cos switch(config-if-Et3/27)# interface ethernet 3/28 switch(config-if-Et3/28)# switchport switch(config-if-Et3/28)# default qos trust switch(config-if-Et3/28)# interface ethernet 3/29 switch(config-if-Et3/29)# no switchport switch(config-if-Et3/29)# default qos trust switch(config-if-Et3/29)# show qos interface ethernet 3/25 - 3/29 trust Port Trust Mode Operational Configured --------------------------------------------------------------- Ethernet3/25 DSCP DSCP Ethernet3/26 UNTRUSTED UNTRUSTED Ethernet3/27 COS COS Ethernet3/28 COS DEFAULT Ethernet3/29 DSCP DEFAULT switch(config-if-Et3/29)#
Configuring Default Port Settings
Port channel and Ethernet interfaces are not assigned default CoS or DSCP settings.
Traffic Class Derivations – Petra Platform Switches
Traffic Classes describes traffic classes.
Traffic Class Derivation Source
| Untrusted | CoS Trusted | DSCP Trusted | |
| Untagged Non-IP | Default TC (chip) | Default TC (chip) | Default TC (chip) |
| Untagged IP | Default TC (chip) | Default TC (chip) | DSCP (packet) |
| Tagged Non-I | Default TC (chip) | CoS (packet) | Default TC (chip) |
| Tagged IP | Default TC (chip) | CoS (packet) | DSCP (packet) |
Configuring Default Traffic Class
Petra platform switches assign a default traffic class to the set of Ethernet interfaces controlled by individual PetraA chips. Default traffic class values are configurable for each PetraA chip, not individual interfaces.
The platform petraA traffic-class command specifies the default traffic class used by all ports controlled by a specified chip. The show platform petraA traffic-classcommand displays traffic class assignments.
- This command configures the default traffic class to five for the ports
32-39 on linecard
3 (7500
Series).
switch(config)# platform petraA petra3/4 traffic-class 5 switch(config)# show platform petraA module 3 traffic-class Petra3/0 traffic-class: 1 Petra3/1 traffic-class: 1 Petra3/2 traffic-class: 1 Petra3/3 traffic-class: 1 Petra3/4 traffic-class: 5 Petra3/5 traffic-class: 1 switch(config)# - This command configures the default traffic class to three for all ports on
linecard 6 (7500
Series).
switch(config)# platform petraA module 6 traffic-class 6 switch(config)# show platform petraA module 6 traffic-class Petra6/0 traffic-class: 6 Petra6/1 traffic-class: 6 Petra6/2 traffic-class: 6 Petra6/3 traffic-class: 6 Petra6/4 traffic-class: 6 Petra6/5 traffic-class: 6 switch(config)#
Mapping CoS to Traffic Class
The qos map cos command assigns a traffic class to a list of CoS settings. Multiple commands create a complete CoS–traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the port upon which it is received.
Example
switch(config)#qos map cos 1 3 5 7 to traffic-class 4
switch(config)#show qos maps
Number of Traffic Classes supported: 8
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 4 2 4 4 4 6 4
switch(config)#The following table displays the default CoS to traffic class map on Petra platform switches.
| Inbound CoS | untagged | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping DSCP to Traffic Class
The qos map dscp command assigns a traffic class to a set of DSCP values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
Example
switch(config)# qos map dscp 12 13 14 25 48 to traffic-class 3
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 3 3 3 0 2 2 2 2
2 : 2 2 2 2 3 3 3 3 3 3
3 : 3 3 4 4 4 4 4 4 4 4
4 : 5 5 5 5 5 5 5 5 3 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch(config)#The following table displays the default DSCP to Traffic Class map on Petra platform switches.
| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
CoS Rewrite – Petra Platform Switches
Rewriting CoS and DSCP describes the CoS rewrite function.
Traffic Class to CoS Rewrite Map
The CoS rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-CoS rewrite map. The qos map traffic-class to coscommand assigns a CoS rewrite value to a list of traffic classes. Multiple commands create the complete traffic class-CoS rewrite map.
Example
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc-cos map:
tc: 0 1 2 3 4 5 6 7
----------------------------
cos: 1 2 2 2 4 2 6 7
switch(config)#The following table displays the default Traffic Class to CoS rewrite value map on Petra platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Traffic Class to DSCP Rewrite Map
DSCP rewrite is always disabled on Petra platform switches.
Transmit Queues and Port Shaping – Petra Platform Switches
Transmit Queues and Port Shaping describes transmit queues and port shaping.
Petra platform switches provide four physical queues for each egress port: Unicast High, Unicast Low, Multicast High, and Multicast Low. Data is scheduled for the high or low queue based on its priority as defined by its transmit queue assignment (unicast traffic) or traffic class (multicast traffic), as shown in the table below. A Petra transmit queue is a data structure that defines scheduling of unicast traffic among phyical egress queues.
| High Priority Queue | Low Priority Queue | |
|---|---|---|
| Unicast Traffic | Transmit Queues 5 – 7 | Transmit Queues 0 – 4 |
| Multicast Traffic | Traffic Classes 5 – 7 | Traffic Classes 0 – 4 |
Multicast queue capacity that is available after multicast traffic is serviced is used for unicast traffic of a corresponding priority. Similarly, unicast queue capacity that is available after unicast traffic is serviced is used for overflow multicast traffic. Under conditions of unicast and multicast congestion, egress traffic is evenly split between unicast and multicast traffic.
Unicast Transmit Queues and Port Shapingdescribes unicast transmit queues and shaping. Multicast Egress Scheduling describes multicast priority and traffic classes.
Unicast Transmit Queues and Port Shaping
A data stream’s traffic class determines the transmit queue it uses. The switch defines a single traffic class–transmit queue map for unicast traffic on all Ethernet interfaces. The show qos maps command displays the traffic class–transmit queue map. The following table displays the default traffic class to transmit queue map on Petra platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Transmit queue parameters are configured in tx-queue configuration command mode.
Mapping Traffic Classes to a Transmit Queue
The qos map traffic-class to tx-queue command assigns traffic classes to a transmit queue. Multiple commands complete the traffic class-transmit queue map. Traffic class 7 and transmit queue 7 are always mapped to each other. This association is not editable.
Example
switch(config)# qos map traffic-class 1 3 5 to tx-queue 1
switch(config)# qos map traffic-class 2 4 6 to tx-queue 2
switch(config)# qos map traffic-class 0 to tx-queue 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 1 2 1 2 7
switch(config)#Entering Tx-Queue Configuration Mode
The tx-queue (Petra) command places the switch in tx-queue configuration mode to configure a transmit queue on the configuration mode interface. Tx-queue 7not configurable. The show qos interfaces displays the transmit queue configuration for a specified port.
Example
switch(config)# interface ethernet 3/28
switch(config-if-Et3/28)# tx-queue 3
switch(config-if-Et3/28-txq-3)#Configuring the Shape Rate – Port and Transmit Queues
- To configure a port’s shape rate, enter shape rate (Interface – Petra) from the port’s interface configuration mode.
- To configure a transmit queue’s shape rate, enter shape rate (Tx-queue – Petra) from the queue’s tx-queue configuration mode.
Example
- transmit queues 0, 1, and 2: 500 Mbps
-
transmit queues 3, 4, and 5: 400 Mbps
switch(config)# interface ethernet 3/28 switch(config-if-Et3/28)# shape rate 5000000 switch(config-if-Et3/28)# tx-queue 0 switch(config-if-Et3/28-txq-0)# shape rate 500000 switch(config-if-Et3/28-txq-0)# tx-queue 1 switch(config-if-Et3/28-txq-1)# shape rate 500000 switch(config-if-Et3/28-txq-1)# tx-queue 2 switch(config-if-Et3/28-txq-2)# shape rate 500000 switch(config-if-Et3/28-txq-5)# tx-queue 3 switch(config-if-Et3/28-txq-3)# shape rate 400000 switch(config-if-Et3/28-txq-3)# tx-queue 4 switch(config-if-Et3/28-txq-4)# shape rate 400000 switch(config-if-Et3/28-txq-4)# tx-queue 5 switch(config-if-Et3/28-txq-5)# shape rate 400000 switch(config-if-Et3/28-txq-5)# show qos interface ethernet 3/28 Ethernet3/28: Port shaping rate: 5000000Kbps Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A 400000 strict 4 N/A 400000 strict 3 N/A 400000 strict 2 N/A 500000 strict 1 N/A 500000 strict 0 N/A 500000 strict switch(config-if-Et3/28-txq-5)#
Configuring Queue Priority
- The priority strict command configures the queue as a strict priority queue.
- The no priority command configures the queue as a round robin queue.
A queue’s configuration as round robin also applies to all lower priority queues regardless of other configuration statements.
The bandwidth percent (Petra) command configures a round robin queue’s bandwidth share. The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
- These commands configure transmit queue 3 (on interface Ethernet 3/28) as a round robin queue, then allocates 10%, 20%, 30%, and 40% bandwidth to queues 0 through 3. The no priority statement for queue 3 also configures queues 0, 1, and 2 as round robin queues. Removing this statement reverts the other queues to strict priority type unless running-config contains a no priority statement for one of these queues.
switch(config-if-Et3/28)# tx-queue 3 switch(config-if-Et3/28-txq-3)# no priority switch(config-if-Et3/28-txq-3)# bandwidth percent 40 switch(config-if-Et3/28-txq-3)# tx-queue 2 switch(config-if-Et3/28-txq-2)# bandwidth percent 30 switch(config-if-Et3/28-txq-2)# tx-queue 1 switch(config-if-Et3/28-txq-1)# bandwidth percent 20 switch(config-if-Et3/28-txq-1)# tx-queue 0 switch(config-if-Et3/28-txq-0)# bandwidth percent 10 switch(config-if-Et3/28-txq-0)# show qos interface ethernet 3/28 Ethernet3/28: Port shaping rate: 5000000Kbps Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A 400000 strict 4 N/A 400000 strict 3 40 400000 round-robin 2 30 500000 round-robin 1 20 500000 round-robin 0 10 500000 round-robin switch(config-if-Et3/28-txq-0)# - Changing the bandwidth percentage for queue 3 to
60 changes the operational bandwidth of
each queue to its configured bandwidth divided by
120%
(10%+20%+30%+60%).
switch(config-if-Et3/28-txq-0)# tx-queue 3 switch(config-if-Et3/28-txq-3)# bandwidth percent 60 switch(config-if-Et3/28-txq-3)# show qos interface ethernet 3/28 Ethernet3/28: Port shaping rate: 5000000Kbps Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A 400000 strict 4 N/A 400000 strict 3 49 400000 round-robin 2 24 500000 round-robin 1 16 500000 round-robin 0 8 500000 round-robin switch(config-if-Et3/28-txq-3)#
Multicast Egress Scheduling
Multiclass traffic is not affected by traffic class assignment or port shaping statements. Multicast traffic is assigned to port egress queues based on traffic class and uses strict priority to schedule egress between the high and low queues.
QoS Configuration: Trident and Tomahawk Platform Switches
- CoS and DSCP Port Settings – Trident and Tomahawk Platform Switches
- Traffic Class Derivations – Trident and Tomahawk Platform Switches
- CoS and DSCP Rewrite – Trident and Tomahawk Platform Switches
- Transmit Queues and Port Shaping – Trident and Tomahawk Platform Switches
- ECN Configuration – Trident and Tomahawk Platform Switches
CoS and DSCP Port Settings – Trident and Tomahawk Platform Switches
Configuring Port Trust Settings
- qos trust cos specifies CoS as the port’s trust mode.
- qos trust dscp specifies DSCP as the port’s trust mode.
- no qos trust specifies untrusted as the port’s trust mode.
The show qos interfaces trust command displays the trust mode of specified interfaces.
Example
-
These commands configure and display the following trust modes:
- Ethernet 15: dscp
- Ethernet 16: untrusted
- Ethernet 17: cos
- Ethernet 18: default as a switched port
- interface ethernet 19:
default as a routed
port
switch(config)# interface ethernet 15 switch(config-if-Et15)# qos trust dscp switch(config-if-Et15)# interface ethernet 16 switch(config-if-Et16)# no qos trust switch(config-if-Et16)# interface ethernet 17 switch(config-if-Et17)# qos trust cos switch(config-if-Et17)# interface ethernet 18 switch(config-if-Et18)# switchport switch(config-if-Et18)# default qos trust switch(config-if-Et18)# interface ethernet 19 switch(config-if-Et19)# no switchport switch(config-if-Et19)# default qos trust switch(config-if-Et19)# show qos interface ethernet 15 - 19 trust Port Trust Mode Operational Configured --------------------------------------------------------------- Ethernet15 DSCP DSCP Ethernet16 UNTRUSTED UNTRUSTED Ethernet17 COS COS Ethernet18 COS DEFAULT Ethernet19 DSCP DEFAULT switch(config-if-Et19)#
Configuring Default Port Settings
Example
switch(config)# interface ethernet 7
switch(config-if-Et7)# qos cos 4
switch(config-if-Et7)# qos dscp 44
switch(config-if-Et7)# show active
interface Ethernet7
qos cos 4
qos dscp 44
switch(config-if-Et7)# show qos interfaces ethernet 7
Ethernet7:
Trust Mode: COS
Default COS: 4
Default DSCP: 44
switch(config-if-Et7)#Traffic Class Derivations – Trident and Tomahawk Platform Switches
Traffic Classesdescribes traffic classes.
Traffic Class Derivation Source
The following table displays the source for deriving a data stream’s traffic class.
| Untrusted | CoS Trusted | DSCP Trusted | |
| Untagged Non-IP | Default CoS (port) | Default CoS (port) | Default DSCP (port) |
| Untagged IP | Default CoS (port) | Default CoS (port) | DSCP (packet) |
| Tagged Non-IP | Default CoS (port) | CoS (packet) | Default DSCP (port) |
| Tagged IP | Default CoS (port) | CoS (packet) | DSCP (packet) |
CoS and DSCP Port Settings – Trident and Tomahawk Platform Switches describes the default CoS and DSCP settings for each port.
Mapping CoS to Traffic Class
The qos map cos command assigns a traffic class to a list of CoS settings. Multiple commands create a complete CoS to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the port upon which it is received.
Example
switch(config)# qos map cos 1 3 5 7 to traffic-class 5
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 5 2 5 4 5 6 5
switch(config)#The following table displays the default CoS–traffic class map on Trident and Tomahawk platform switches.
| Inboun CoS | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping DSCP to Traffic Class
The qos map dscp command assigns a traffic class to a set of DSCP values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
Example
switch(config)# qos map dscp 12 24 41 44 45 46 47 to traffic-class 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 0 0 0 0 2 2 2 2
2 : 2 2 2 2 0 3 3 3 3 3
3 : 3 3 4 4 4 4 4 4 4 4
4 : 5 0 5 5 0 0 0 0 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch(config)#The following table displays the default DSCP–traffic class map on Trident and Tomahawk platform switches.
| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
CoS and DSCP Rewrite – Trident and Tomahawk Platform Switches
Rewriting CoS and DSCPdescribes the CoS and DSCP rewrite functions.
Traffic Class to CoS Rewrite Map
The CoS rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-CoS rewrite map. The qos map traffic-class to cos command assigns a CoS rewrite value to a list of traffic classes. Multiple commands create the complete traffic class–CoS rewrite map.
Example
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc-cos map:
tc: 0 1 2 3 4 5 6 7
----------------------------
cos: 1 2 2 2 4 2 6 7
switch(config)#The following table displays the default Traffic Class to CoS rewrite value map on Trident and Tomahawk platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Traffic Class to DSCP Rewrite Map
The DSCP rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-DSCP rewrite map. The qos map traffic-class to dscp command assigns a DSCP rewrite value to a list of traffic classes. Multiple commands create the complete traffic class-DSCP rewrite map.
Example
switch(config)#qos map traffic-class 2 4 6 to dscp 29
switch(config)#show qos map
Number of Traffic Classes supported: 8
Tc-dscp map:
tc: 0 1 2 3 4 5 6 7
-----------------------------
dscp: 8 0 29 24 29 40 29 56
switch(config)#The following displays the default traffic class to DSCP rewrite map on Trident and Tomahawk platform switches.
|
Traffic Class |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
DSCP |
8 |
0 |
16 |
24 |
32 |
40 |
48 |
56 |
Transmit Queues and Port Shaping – Trident and Tomahawk Platform Switches
Transmit Queues and Port Shaping describes transmit queues and port shaping.
Trident and Tomahawk platform switches define 12 transmit queues: eight unicast (UC0 – UC7) and four multicast (MC0 – MC03). The traffic class–transmit queue maps are configured globally and apply to all Ethernet interfaces. The show qos maps command displays the traffic class–transmit queue maps.
The following table displays the default traffic class–transmit queue maps.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Unicast Transmit Queue | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Multicast Transmit Queue | 0 | 0 | 1 | 1 | 2 | 2 | 3 | 3 |
Mapping Traffic Classes to a Transmit Queue
- qos map traffic-class to uc-tx-queue associates a unicast queue to a traffic class set.
- qos map traffic-class to mc-tx-queue associates a multicast queue to a traffic class set.
Multiple commands create the complete maps.
Example
- traffic classes 1, 3, and 5 to unicast queue 1
- traffic classes 2, 4, and 6 to unicast queue 5
- traffic classes 1, 2, and 3 to multicast queue 1
- traffic classes 4, 5, and 6 to multicast queue 3
- traffic class 0 to unicast queue
0 and multicast queue
0
switch(config)# default interface ethernet 7 switch(config)# qos map traffic-class 1 3 5 to uc-tx-queue 1 switch(config)# qos map traffic-class 2 4 6 to uc-tx-queue 5 switch(config)# qos map traffic-class 1 2 3 to mc-tx-queue 1 switch(config)# qos map traffic-class 4 5 6 to mc-tx-queue 3 switch(config)# qos map traffic-class 0 to uc-tx-queue 0 switch(config)# qos map traffic-class 0 to mc-tx-queue 0 switch(config)# show qos maps Number of Traffic Classes supported: 8 Number of Transmit Queues supported: 12 Tc - uc-tx-queue map: tc: 0 1 2 3 4 5 6 7 ------------------------------------ uc-tx-queue: 0 1 5 1 5 1 5 7 Tc - mc-tx-queue map: tc: 0 1 2 3 4 5 6 7 ------------------------------------ mc-tx-queue: 0 1 1 1 3 3 3 3 switch(config)#
Entering a Transmit Queue Configuration Mode
- uc-tx-queue places the switch in uc-tx-queue mode to configure a unicast transmit queue.
- mc-tx-queue places the switch in mc-tx-queue mode to configure a multicast transmit queue.
The show qos interfaces displays the transmit queue configuration for a specified port.
- This command enters the mode that configures unicast transmit
queue 3 of interface ethernet
5.
switch(config)# interface ethernet 5 switch(config-if-Et5)# uc-tx-queue 3 switch(config-if-Et5-uc-txq-3)# - This command enters the mode to configure multicast transmit
queue 3 of interface ethernet
5.
switch(config-if-Et5)# mc-tx-queue 2 switch(config-if-Et5-mc-txq-2)#
Configuring the Shape Rate – Port and Transmit Queues
- To configure a port’s shape rate, enter shape rate (Interface – Trident and Tomahawk) from the port’s interface configuration mode.
- To configure a transmit queue’s shape rate, enter shape rate (Tx-queue – Trident and Tomahawk) from the queue’s tx-queue configuration mode.
Example
- unicast transmit queues 0 and 1: 500 Mbps.
- unicast transmit queues 3 and 4: 400 Mbps.
- multicast transmit queues 0 and
2: 300
Mbps.
switch(config)# interface ethernet 7 switch(config-if-Et7)# shape rate 5000000 switch(config-if-Et7)# uc-tx-queue 0 switch(config-if-Et7-uc-txq-0)# shape rate 500000 switch(config-if-Et7-uc-txq-0)# uc-tx-queue 1 switch(config-if-Et7-uc-txq-1)# shape rate 500000 switch(config-if-Et7-uc-txq-1)# uc-tx-queue 3 switch(config-if-Et7-uc-txq-3)# shape rate 400000 switch(config-if-Et7-uc-txq-3)# uc-tx-queue 5 switch(config-if-Et7-uc-txq-5)# shape rate 400000 switch(config-if-Et7-uc-txq-5)# mc-tx-queue 0 switch(config-if-Et7-mc-txq-0)# shape rate 300000 switch(config-if-Et7-mc-txq-0)# mc-tx-queue 2 switch(config-if-Et7-mc-txq-2)# shape rate 300000 switch(config-if-Et7-mc-txq-2)# exit switch(config-if-Et7)# show qos interface ethernet 7 Ethernet7: Port shaping rate: 5000000Kbps Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A 400000 strict 0 UC4 N/A disabled strict 0 MC2 N/A 300000 strict 0 UC3 N/A 400000 strict 0 UC2 N/A disabled strict 0 MC1 N/A disabled strict 0 UC1 N/A 500000 strict 0 UC0 N/A 500000 strict 0 MC0 N/A 300000 strict 0 switch(config-if-Et7)#
Configuring Queue Priority
- Priority Group 1: UC7, UC6, MC3
- Priority Group 0: UC5, UC4, MC2, UC3, UC2, MC1, UC1, UC0, MC0
- The priority strict command configures the queue as a strict priority queue.
- The no priority command configures the queue as a round robin queue.
A queue’s configuration as round robin also applies to all lower priority queues regardless of other configuration statements.
The bandwidth percent (Trident and Tomahawk) command configures a round robin queue’s bandwidth share. The cumulative operational bandwidth of all round robin queues is always 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
Priority Group 1 queues (UC7, UC6, MC3) are not configurable as round robin queues. The bandwidth percent command is not available for these queues.
- These commands configure unicast transmit queue 3 as a round robin queue, then allocates 5%, 15%, 25%, 35%, 8%, and 12% bandwidth to unicast transmit queues 0 through 3 and multicast transmit queues 0 and 1, respectively.The no priority statement for queue 3 also configures priority for all lower priority queues. Removing the statement reverts the other queues to strict priority type unless running-config contains a no priority statement for one of these queues.
switch(config)# interface ethernet 7 switch(config-if-Et7)# uc-tx-queue 3 switch(config-if-Et7-uc-txq-3)# no priority switch(config-if-Et7-uc-txq-3)# bandwidth percent 5 switch(config-if-Et7-uc-txq-3)# uc-tx-queue 2 switch(config-if-Et7-uc-txq-2)# bandwidth percent 15 switch(config-if-Et7-uc-txq-2)# uc-tx-queue 1 switch(config-if-Et7-uc-txq-1)# bandwidth percent 25 switch(config-if-Et7-uc-txq-1)# uc-tx-queue 0 switch(config-if-Et7-uc-txq-0)# bandwidth percent 35 switch(config-if-Et7-uc-txq-0)# mc-tx-queue 1 switch(config-if-Et7-mc-txq-1)# bandwidth percent 12 switch(config-if-Et7-mc-txq-1)# mc-tx-queue 0 switch(config-if-Et7-mc-txq-0)# bandwidth percent 8 switch(config-if-Et7-mc-txq-0)# show qos interface ethernet 7 Ethernet7: Port shaping rate: disabled Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A disabled strict 0 UC4 N/A disabled strict 0 MC2 N/A disabled strict 0 UC3 5 disabled round-robin 0 UC2 15 disabled round-robin 0 MC1 12 disabled round-robin 0 UC1 25 disabled round-robin 0 UC0 35 disabled round-robin 0 MC0 8 disabled round-robin 0 switch(config-if-Et7-mc-txq-0)# - Changing the bandwidth percentage for unicast queue
3 to 30 changes the
operational bandwidth of each queue to its configured bandwidth divided by
125% (8%+12%+30%+15%+25%+35%).
switch(config-if-Et7-uc-txq-0)# uc-tx-queue 3 switch(config-if-Et7-uc-txq-3)# bandwidth percent 30 switch(config-if-Et7-uc-txq-3)# show qos interface ethernet 7 Ethernet7: Port shaping rate: disabled Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A disabled strict 0 UC4 N/A disabled strict 0 MC2 N/A disabled strict 0 UC3 24 disabled round-robin 0 UC2 12 disabled round-robin 0 MC1 9 disabled round-robin 0 UC1 20 disabled round-robin 0 UC0 28 disabled round-robin 0 MC0 6 disabled round-robin 0 switch(config-if-Et7-uc-txq-3)#
ECN Configuration – Trident and Tomahawk Platform Switches
ECN is independently configurable on all egress queues of each Ethernet interface. ECN settings for Port-Channels are applied on each of the channel’s member Ethernet interfaces. ECN is also globally configurable to mark packets from the shared pool used for dynamically allocating memory to the queues. Multicast packets contribute to the globally shared pool and can contribute to global level congestion that result in ECN marking of unicast packets queued after the multicast packets.
Average queue length is tracked for transmit queues and the global pool independently. When either entity reaches its maximum threshold, all subsequent packets are marked.
Although the switch does not limit the number of queues that can be configured for ECN, hardware table limitations restrict the number of queues (including the global shared pool) that can simultaneously implement ECN.
Theqos random-detect ecn global-buffer (Trident and Tomahawk) command enables ECN marking for globally shared packet memory and specifies minimum and maximum queue threshold sizes.
- This command enables ECN marking of unicast packets from the global data pool and sets the
minimum and maximum thresholds at 20 and
500
segments.
switch(config)# qos random-detect ecn global-buffer minimum-threshold 20 segments maximum-threshold 500 segments switch(config)# - This command disables ECN marking of unicast packets from the global data
pool.
switch(config)# no qos random-detect ecn global-buffer switch(config)#The random-detect ecn (Trident and Tomahawk) command enables ECN marking for the configuration mode unicast transmit queue and specifies threshold queue sizes.
- These commands enable ECN marking of unicast packets from transmit queue
4 of interface Ethernet 15, setting
thresholds at 10 and 100
segments.
switch(config)# interface ethernet 15 switch(config-if-Et15)# uc-tx-queue 4 switch(config-if-Et15-uc-txq-4)# random-detect ecn minimum-threshold 10 segments maximum-threshold 100 segments switch(config-if-Et15-uc-txq-4)# show active interface Ethernet15 uc-tx-queue 4 random-detect ecn minimum-threshold 10 segments maximum-threshold 100 segments switch(config-if-Et15-uc-txq-4)# exit switch(config-if-Et15)# - This command disables ECN marking of unicast packets from transmit queue
4 of interface Ethernet
15.
switch(config-if-Et15-uc-txq-4)# no random-detect ecn switch(config-if-Et15-uc-txq-4)# show active interface Ethernet15 switch(config-if-Et15-uc-txq-4)# exit switch(config-if-Et15)#
QoS Configuration: Trident II and Helix Platform Switches
- CoS and DSCP Port Settings – Trident II and Helix Platform Switches
- Traffic Class Derivations – Trident II and Helix Platform Switches
- CoS and DSCP Rewrite – Trident II and Helix Platform Switches
- Transmit Queues and Port Shaping – Trident II and Helix Platform Switches
- Ingress Policing on LAG
- Fabric QoS -- – Trident II Platform Switches
CoS and DSCP Port Settings – Trident II and Helix Platform Switches
Configuring Port Trust Settings
- qos trust cos specifies cos as the port’s port-trust mode.
- qos trust dscp specifies dscp as the port’s port-trust mode.
- no qos trust specifies untrusted as the port’s port-trust mode.
The show qos interfaces trust command displays the trust mode of specified interfaces.
Example
- Ethernet 7/1: dscp.
- Ethernet 7/2: untrusted.
- Ethernet 7/3: cos.
- Ethernet 7/4: default as a switched port.
- Ethernet 8/1: default as a routed port.
-
switch(config)# interface ethernet 7/1 switch(config-if-Et7/1)# qos trust dscp switch(config-if-Et7/1)# interface ethernet 7/2 switch(config-if-Et7/2)# no qos trust switch(config-if-Et7/2)# interface ethernet 7/3 switch(config-if-Et7/3)# qos trust cos switch(config-if-Et7/3)# interface ethernet 7/4 switch(config-if-Et7/4)# switchport switch(config-if-Et7/4)# default qos trust switch(config-if-Et7/4)# interface ethernet 8/1 switch(config-if-Et8/1)# no switchport switch(config-if-Et8/1)# default qos trust switch(config-if-Et8/1)# show qos interface ethernet 7/1 - 8/1 trust Port Trust Mode Operational Configured --------------------------------------------------------------- Ethernet7/1 DSCP DSCP Ethernet7/2 UNTRUSTED UNTRUSTED Ethernet7/3 COS COS Ethernet7/4 COS DEFAULT Ethernet8/1 DSCP DEFAULT switch(config-if-Et8/1)#
Configuring Default Port Settings
Example
switch(config)# interface ethernet 7/3
switch(config-if-Et7/3)# qos cos 4
switch(config-if-Et7/3)# qos dscp 44
switch(config-if-Et7/3)# show active
interface Ethernet7/3
qos cos 4
qos dscp 44
switch(config-if-Et7/3)# show qos interfaces ethernet 7/3
Ethernet7/3:
Trust Mode: COS
Default COS: 4
Default DSCP: 44
switch(config-if-Et7/3)#Traffic Class Derivations – Trident II and Helix Platform Switches
Traffic Classes describes traffic classes.
Traffic Class Derivation Source
The following table displays the source for deriving a data stream’s traffic class.
| Untrusted | CoS Trusted | DSCP Trusted | |
| Untagged Non-IP | Default CoS (port) | Default CoS (port) | Default DSCP (port) |
| Untagged IP | Default CoS (port) | Default CoS (port) | DSCP (packet) |
| Tagged Non-IP | Default CoS (port) | CoS (packet) | Default DSCP (port) |
| Tagged IP | Default CoS (port) | CoS (packet) | DSCP (packet) |
CoS and DSCP Port Settings – Trident II and Helix Platform Switchesdescribes the default CoS and DSCP settings for each port.
Mapping CoS to Traffic Class
The qos map coscommand assigns a traffic class to a list of CoS settings. Multiple commands create a complete CoS to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the port upon which it is received.
Example
switch(config)# qos map cos 1 3 5 7 to traffic-class 5
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 5 2 5 4 5 6 5
switch(config)#The following table displays the default CoS–traffic class map on Trident II platform switches.
| Inbound CoS | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping DSCP to Traffic Class
The qos map dscp command assigns a traffic class to a set of DSCP values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
Example
switch(config)# qos map dscp 12 24 41 44 45 46 47 to traffic-class 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 0 0 0 0 2 2 2 2
2 : 2 2 2 2 0 3 3 3 3 3
3 : 3 3 4 4 4 4 4 4 4 4
4 : 5 0 5 5 0 0 0 0 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch(config)#The following table displays the default DSCP–traffic class map on Trident II platform switches.
| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
CoS and DSCP Rewrite – Trident II and Helix Platform Switches
Rewriting CoS and DSCP describes the CoS and DSCP rewrite functions.
Traffic Class to CoS Rewrite Map
The CoS rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-CoS rewrite map. The qos map traffic-class to cos command assigns a CoS rewrite value to a list of traffic classes. Multiple commands create the complete traffic class–CoS rewrite map.
Example
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)#show qos map
Number of Traffic Classes supported: 8
Tc-cos map:
tc: 0 1 2 3 4 5 6 7
----------------------------
cos: 1 2 2 2 4 2 6 7
switch(config)#The following tabledisplays the default Traffic Class to CoS rewrite value map on Trident II platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value | 1 | 0 | 2 | 3 | 4 | 5 |
6 |
7 |
Traffic Class to DSCP Rewrite Map
The DSCP rewrite value is configurable and based on a data stream’s traffic class, as specified by the traffic class-DSCP rewrite map. The qos map traffic-class to dscp command assigns a DSCP rewrite value to a list of traffic classes. Multiple commands create the complete traffic class-DSCP rewrite map.
Example
switch(config)# qos map traffic-class 2 4 6 to dscp 29
switch(config)# show qos map
Number of Traffic Classes supported: 8
Tc-dscp map:
tc: 0 1 2 3 4 5 6 7
-----------------------------
dscp: 8 0 29 24 29 40 29 56
switch(config)#The following table displays the default traffic class to DSCP rewrite map on Trident II platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| DSCP | 8 | 0 | 16 | 24 | 32 | 40 | 48 | 56 |
Transmit Queues and Port Shaping – Trident II and Helix Platform Switches
Transmit Queues and Port Shaping describes transmit queues and port shaping.
A data stream’s traffic class determines the transmit queue it uses. The switch defines a single traffic class-transmit queue map for all Ethernet interfaces and is used for unicast and multicast traffic. The traffic class to transmit queue maps are configured globally and apply to all Ethernet and port channel interfaces. Theshow qos mapscommand displays the traffic class to transmit queue map.
Trident II platform switches have eight unicast (UC0 – UC7) and eight multicast (MC0 – MC7) queues. Each UCx-MCx queue set is combined into a single queue group (L1.x), which is exposed to the CLI through this command.
The following table displays the default traffic class to transmit queue maps.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue Group | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Mapping Traffic Classes to a Transmit Queue
The qos map traffic-class to tx-queuecommand assigns traffic classes to a transmit queue. Multiple commands create the complete map.
Example
switch(config)# qos map traffic-class 1 3 5 to tx-queue 1
switch(config)# qos map traffic-class 2 4 6 to tx-queue 2
switch(config)# qos map traffic-class 0 to tx-queue 0
switch(config)# show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 1 2 1 2 7
switch(config)#Entering a Transmit Queue Configuration Mode
Transmit queues are configurable on Ethernet ports and port channels. Queue parameters are configured in tx-queue configuration command mode, which is entered from the appropriate interface configuration mode. The tx-queue (Trident II)command places the switch in tx-queue configuration mode. The show qos interfaces displays the transmit queue configuration for a specified port.
Example
switch(config)# interface ethernet 5
switch(config-if-Et5)# tx-queue 3
switch(config-if-Et5-txq-3)#Configuring the Shape Rate – Port and Transmit Queues
- To configure a port’s shape rate, enter shape rate (Interface – Trident II) from the port’s interface configuration mode.
- To configure a transmit queue’s shape rate, enter shape rate (Tx-queue – Trident II) from the queue’s tx-queue configuration mode.
Example
-
- transmit queues 0, 1, and 2: 500 Mbps
-
transmit queues 3, 4, and 5: 400 Mbps
switch(config)# interface ethernet 17/3 switch(config-if-Et17/3)# shape rate 5000000 switch(config-if-Et17/3)# tx-queue 0 switch(config-if-Et17/3-txq-0)# shape rate 500000 switch(config-if-Et17/3-txq-0)# tx-queue 1 switch(config-if-Et17/3-txq-1)# shape rate 500000 switch(config-if-Et17/3-txq-1)# tx-queue 3 switch(config-if-Et17/3-txq-3)# shape rate 400000 switch(config-if-Et17/3-txq-3)# tx-queue 4 switch(config-if-Et17/3-txq-4)# shape rate 400000 switch(config-if-Et17/3-txq-4)# tx-queue 5 switch(config-if-Et17/3-txq-5)# shape rate 400000 switch(config-if-Et17/3-txq-5)# exit switch(config-if-Et17/3)# show qos interface ethernet 17/3 Ethernet17/3: Tx Bandwidth Shape Rate Priority Queue Guaranteed (units) (units) ------------------------------------------------------------ 7 - / - ( - ) - / - ( - ) SP / SP 6 - / - ( - ) - / - ( - ) SP / SP 5 - / - ( - ) 400 / 400 ( Mbps ) SP / SP 4 - / - ( - ) 400 / 400 ( Mbps ) SP / SP 3 - / - ( - ) 400 / 400 ( Mbps ) SP / SP 2 - / - ( - ) - / - ( - ) SP / SP 1 - / - ( - ) 500 / 500 ( Mbps ) SP / SP 0 - / - ( - ) 500 / 500 ( Mbps ) SP / SP switch(config-if-Et17/3)#
Configuring Queue Priority
Queue priority rank is denoted by the queue number; transmit queues with higher numbers have higher priority. Trident II supports strict priority queues; round robin queues are not supported.
The bandwidth guaranteed (Trident II) command configures specifies the minimum bandwidth for outbound traffic on the transmit queue.
Example
switch(config-if-Et17/3)# tx-queue 4
switch(config-if-Et17/3-txq-4)# show qos interface ethernet 17/3
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
5 - / - ( - ) 400 / 400 ( Mbps ) SP / SP
4 1 / 1 ( Mbps ) 400 / 400 ( Mbps ) SP / SP
3 - / - ( - ) 400 / 400 ( Mbps ) SP / SP
2 - / - ( - ) - / - ( - ) SP / SP
1 - / - ( - ) 500 / 500 ( Mbps ) SP / SP
0 - / - ( - ) 500 / 500 ( Mbps ) SP / SP
switch(config-if-Et17/3-txq-4)#Ingress Policing on LAG
Ingress policing on a port-channel polices the matched traffic from all member interfaces combined, i.e. it provides aggregate policing and statistics (DCS-7050X, DCS-7010T, DCS-7250X, and DCS-7300X series). When a per-interface policer is attached to a port-channel, one set of TCAM entries is created for all member interfaces. The associated interface bitmap is updated, and aggregate policing is performed on all member interfaces.
- These commands configure a service-policy (with policer action) on LAG by creating the
service-policy and applying the service-policy on a
port-channel.
switch(config)# policy-map policy-1 switch(config-pmap-qos-policy-1)# class class-1 switch(config-pmap-c-qos-policy-1-class-1)# police cir 512000 bps bc 96000 switch(config-pmap-c-qos-policy-1-class-1)# exit switch(config-pmap-qos-policy-1)# exit switch(config)# interface Et 4 / 5 / 4 switch(config-if-Et4/5/4)# channel-group 2 mode active switch(config-if-Et4/5/4)# exit switch(config)# interface po2 switch(config-if-Po2)# service-policy type qos input policy-1 switch(config-if-Po2)# exit switch(config)# - These commands configure ACL policing in single-rate, two-color
mode.
switch(config)# class-map type qos match-any class1 switch(config-cmap-qos-class1)# match ip access-group acl1 switch(config-cmap-qos-class1)# exit switch(config)# policy-map type quality-of-service policy1 switch(config-pmap-qos-policy1)# class class1 switch(config-pmap-c-qos-policy1-class1)# police cir 512000 bc 96000 switch(config-pmap-c-qos-policy1-class1)# exit switch(config-pmap-qos-policy1)# exit switch(config)# show policy-map Service-policy policy1 Class-map: class1 (match-any) Match: ip access-group name acl1 police rate 512000 bps burst-size 96000 bytes Class-map: class-default (match-any) switch(config)#
Fabric QoS -- – Trident II Platform Switches
EOS is optimized to support QoS configuration on the Fabric interfaces on 7250x and 7300 series switches. Configuring QoS on the Fabric interfaces in addition to front panel ports allows user to have end-to-end control and helps to manage traffic better over these switches. By default, tx queues are configured as strict priority on 7250X and 7300X series.
- Guaranteed Bandwidth: In order to prevent queue starvation on fabric ports EOS supports minimum bandwidth configuration on per queue basis across all fabric ports.
- Explicit Congestion Notification (ECN): EOS supports enabling ECN on a per queue basis across all fabric ports.
- Priority Flow Control (PFC): Queue back-pressure propagates across the backplane such that flow control messages can be generated to the upstream devices. This is done by enabling PFC for the desired backplane traffic-classes.
- Weight Round Robin (WRR): EOS supports configuring Weighted Round Robin (WRR) on a per queue basis across all fabric ports.
Configuring Fabric QoS on 7250X and 7300X Series
Fabric QoS is configured using a QoS profiles which is then applied on fabric interfaces on 7250x and 7300x series. Following are the steps to configure Fabric QoS.
Displaying Fabric QoS Information
- show qos profile [profile Name]: Displays the list of QoS profiles configured on the switch.
- show qos interfaces fabric: Displays the profile applied on the fabric interface on the switch.
Examples
- This command displays the fabricProfile profile
information.
switch# show qos profile fabricProfile qos profile fabricProfile priority-flow-control priority 1 no-drop priority-flow-control priority 6 no-drop dlb tx-queue 0 bandwidth guaranteed 10000 kbps random-detect ecn minimum-threshold 10 mbytes maximum-threshold 10 mbytes - This command displays the profile applied on the fabric
interface.
switch# show qos interfaces fabric qos profile fabricProfile
Support for Configuring Color Extended Communities
EOS Release 4.23.1F introduces the ability to configure the color extended community in route-map set clauses and in an extcommunity-list for inbound and outbound policy application.
Use the color extended community for per-destination steering into Segment-Routing Traffic-Engineered (SR-TE) policies. If the next-hop and color of a BGP route match a particular policy (composed of an endpoint and color), any traffic bound to the destination can be steered according to the policy instead of forwarded via an IGP path or tunnel.
Platform Compatibility
Configuring color extended communities is supported on all platforms.
Configuration
Use the following command for color extended community expressions:
color COLOR-VALUE [color-only (exact-match | (endpoint-match (any | null)))]
Use this command in route-maps and extcommunity-lists to apply inbound and outbound policy.
| Configuring Color Extended Community in route-map mode | |
|---|---|
| Command(config-route-map mode) | [no | default] set extcommunity COLOR-EXPRESSION [additive | delete] |
| Action | Adds a color extended community to be applied to routes affected by the route-map. Multiple set clauses can be applied to a single route-map to configure multiple colors for routes. Additive adds the extended communities to those received, while delete deletes any matching extended color communities. Negating the command removes the entry from the route-map. |
| Default |
None |
| Example |
|
| Configuring Color Extended Community in extcommunity-list | |
|---|---|
| Command(config mode) |
|
| Action | Adds a color extended community to an extcommunity-list. Multiple color extended communities can be added to the list. Negating the command removes the corresponding color extended community from the list. |
| Default | None |
| Example |
|
Limitations
The color extended community is only supported in multi-agent mode. Enable Multi-agent mode via the following command:
service routing protocols mode multi-agent
ACL based QoS Configuration
ACL Based QoS (DCS-7160)
The IPv4 ACL based QoS is enabled on switches through policy-map configuration. The ACL based QoS can be configured on front panel ports, port-channel interfaces on DCS-7160 series switches.
ACL based QoS on SVIs
The ACL based QoS policy applied on SVIs modify the QoS parameters for SVI traffic (L3 VLAN) based on ACL classification. The ACL based QoS on Switched Virtual Interface (SVI) ports is supported on DCS-7500E, DCS-7280E, DCS-7010, DCS-7050, DCS-7050X, DCS-7250X, DCS-7300X, DCS-7020TR.
ACL Sharing on QoS
The ACLs applied on QoS shares the hardware resources (TCAM) when potentially large QoS policy-maps are applied to multiple SVIs. For ACL based QoS on SVIs in sharing mode we share TCAM for class-maps without policer action and replicate entries for policer class-maps. The ACL Sharing on QoS is supported only on selected platforms.
The QoS actions is applicable only to the routed traffic flowing through the members of the corresponding VLAN.
The steps to configure ACL based QoS is as follows:
Limitations
- Maximum number of TCAM entries that can be programmed in hardware for all QoS policy-maps on the box is 1024.
- Layer 4 port ranges are not supported for ACL based QoS. The ranges will be expanded into multiple TCAM rules and programmed in the hardware.
- Configured policer rate should be above 1mbps and recommended burst value is 2000 bytes.
- Policer action cannot be associated with policy-maps applied to Port-Channels.
The following are the limitations specific to DCS-7500E, DCS-7280E and DCS-7020TR:
- When different QoS service policies are applied to the SVI and its member interfaces, the behavior is indeterministic.
- When QoS service policies are applied on SVIs with partial failures due to limited hardware resources, any event that triggers a forwarding agent restart will lead to indeterministic behavior.
- When QoS service policies are applied on 2 SVIs, any event that triggers the VLAN membership change of a member interface may result in a policy-map programming failure. To change the VLAN membership, remove the interface from the first VLAN and then add it to the other.
- Outgoing COS rewrite is not supported.
- QoS policy-map counters are not supported.
- TCAM resources will not be shared for the same policy-map applied to multiple SVIs.
- Policy-map applied to a SVI will result in TCAM allocation on all chips irrespective of whether the SVI members are present or not.
When QoS service policies are applied to both SVI and its member interfaces and packets hit both policies, the behavior is indeterministic.
Configuring IPv6 Flow Label Matches for QoS
In addition to criteria like COS and DSCP, QoS decisions can be based on the IPv6 flow labels of packets. To use IPv6 flow labels as a criterion for QoS decisions, use the permit command to create ACL rules to select packets based on their IPv6 flow labels using an exact match and an optional mask, and then apply the access list to a class map in a QoS policy map, which can then be applied to individual interfaces. This requires a TCAM profile which must be installed explicitly.
Install the QoS Flow Label TCAM Profile
hardware tcam
system profile qos-match-ipv6-flow-labelThere are approximately 130 lines.
Paste this into the CLI of the switch. Each command in the file will be executed in turn when you paste the file contents. When the paste completes, if the cursor is at the end of the last command, type enter to execute it.
Confirm the QoS Flow Label TCAM Profile Installation
Configure the TCAM with the hardware tcam command, and use the system profile command to confirm that the “qos-match-ipv6-flow-label” profile has been installed. If the profile is installed, the ? operator will show “qos-match-ipv6-flow-label” as an available profile.
Example
switch(config)#hardware tcam
switch(config-tcam)#system profile qos-match?
WORD qos-match-ipv6-flow-label
switch(config-tcam)#exit
switch(config)#Apply the QoS Flow Label TCAM Profile
If the profile "qos-match-ipv6-flow-label" is listed, use the system profile command to apply it. Confirm that the profile has been successfully applied with the show hardware tcam command.
Example
The following commands apply the profile “qos-match-ipv6-flow-label” to the TCAM configuration, then confirm that the profile has been applied. The warning is normal, as the restart of forwarding agents is part of the procedure.
switch(config)#hardware tcam
switch(config-tcam)#system profile qos-match-ipv6-flow-label
!
WARNING!
Changing TCAM profile will cause forwarding agent(s) to exit and restart.
All traffic through the forwarding chip managed by the restarting
forwarding agent will be dropped.
Proceed [y/n]y
switch(config-tcam)#exit
switch(config)#show hardware tcam profile
Configuration Status
FixedSystem qos-match-ipv6-flow-label qos-match-ipv6-flow-label
switch(config)#Create IPv6 ACL Rules
Configure an access list with the ipv6 access-list command. Then create rules with the permit ipv6 command.
Example
switch(config)#ipv6 access-list L1
switch(config-ipv6-acl-L1)#permit ipv6 any any flow-label eq 23
switch(config-ipv6-acl-L1)#exit
switch(config)#Add Access List to QoS Class Map
Configure a QoS class map with the class-map command. Then add an access list to the class map with the match command.
Example
switch(config)#class-map type qos match-any C1
switch(config-cmap-qos-C1)#match ipv6 access-group L1
switch(config-cmap-qos-C1)#exit
switch(config)#Add Class Map to Policy Map
Configure a QoS policy map, creating it if necessary, with the policy-map command. Then add a class map to the policy map and define the traffic class.
Example
switch(config)#policy-map type quality-of-service P1
switch(config-pmap-quality-of-service-P1)#class C1
switch(config-pmap-c-quality-of-service-P1-C1)#set traffic-class 4
switch(config-pmap-c-quality-of-service-P1-C1)#exit
switch(config-pmap-quality-of-service-P1)#exit
switch(config)#Configure An Interface with QoS Policy
Configure an interface with the interface command. Apply the QoS policy to the interface with the service-policy command.
Example
switch(config)#interface Ethernet 1/1
switch(config-if-Et1/1)#service-policy type qos input P1
switch(config-if-Et1/1)#exit
switch(config)#Example
switch(config)#show policy-map P1
Service-policy input: P1
Hardware programming status: Successful
Class-map: C1 (match-any)
Match: ipv6 access-group name L1
set traffic-class 4
Class-map: class-default (match-any)
switch(config)#show ipv6 access-lists L1
IPV6 Access List L1
10 permit ipv6 any any flow-label eq 23
switch(config)#Differentiated MMU Discard Counters
To count discarded packets through tagging, assign drop-precendes for a certain class of packets on platforms that support such tagging.
Configuring Differentiated MMU Discard Counters
- Configure an IP access-lists to match
traffic
switch(config)# ip access-list acl1 switch(config-acl-acl1)# permit 41 any any !!41 = 0x29 = IPv6 - Add the access-list to a
class-map
switch(config)# class-map type qos match-any class1 switch(config-cmap-qos-class1)# match ip access-group acl1 - Add the class-map to a
policy-map
switch(config)# policy-map type quality-of-service policy1 switch(config-pmap-quality-of-service-policy1)# class class1 - Add drop-precedence action to the
policy-map
switch(config-pmap-c-quality-of-service-policy1-class1)# set drop-precedence 2 - Create qos profile with the policy map
assigned
switch(config)# qos profile qos1 switch(config-qos-profile-qos1)# service-policy input policy1 - Apply the policy-map to the interface
switch(config)# int et3/1 switch(config-if-Et3/1)# service-profile qos1
Repeat step 6 on all interfaces that receive traffic to be counted. Packets are tagged on ingress. If the same packet gets dropped on egress as an MMU discard, the corresponding counter gets incremented.
Displaying Differentiated MMU Discard Counters
switch# show interface counters queue drop-precedence
intf 0 1 2
Et1/1 100 0 200
Et1/2 200 0 300
…Quality of Service Commands
QoS Data Field and Traffic Class Configuration Commands
- color
- hardware access-list qos resource sharing vlan in
- ip extcommunity-list
- platform petraA traffic-class
- qos cos
- qos dscp
- qos map cos
- qos map dscp
- qos map dscp to traffic-class
- qos map dscp to traffic-class (MPLS tunnel termination VRF)
- qos map traffic-class to cos
- qos map traffic-class to dscp
- qos map traffic-class to mc-tx-queue
- qos map traffic-class to tx-queue
- qos map traffic-class to uc-tx-queue
- qos profile
- qos rewrite cos
- qos rewrite dscp
- qos trust
- service-policy type qos input
- service-profile
- set extcommunity
QoS and ECN Display Commands
- show interface counters queue drop-precedence
- show platform petraA traffic-class
- show platform trident tcam shared vlan interface-class-id
- show platform trident tcam qos detail
- show platform xp qos tcam hit
- show policy-map
- show policy-map interface
- show qos interfaces
- show qos interfaces latency maximum
- show qos interfaces trust
- show qos interfaces random-detect ecn
- show qos maps
- show qos map dscp to traffic-class
- show qos profile
- show run|grep sharing
- show qos profile summary
- show qos random-detect ecn
ECN Configuration Commands
Transmit Queue and Port Shaping Commands – Arad and Jericho Platforms
Transmit Queue and Port Shaping Commands – FM6000 Platform
Transmit Queue and Port Shaping Commands – Helix Platform
Transmit Queue and Port Shaping Commands – Petra Platform
Transmit Queue and Port Shaping Commands – Trident and Tomahawk Platform
Transmit Queue and Port Shaping Commands – Trident II Platform
bandwidth guaranteed (Helix)
The bandwidth guaranteed command specifies the minimum bandwidth for outbound traffic on the transmit queue. By default, no bandwidth is guaranteed to any transmit queue.
The no bandwidth guaranteed and default bandwidth guaranteed commands remove the minimum bandwidth guarantee on the transmit queue by deleting the corresponding bandwidth guaranteed command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
bandwidth guaranteed rate DATA_MIN
no bandwidth guaranteed
default bandwidth guaranteed
Parameters
- 8 to 40000000 8 to 40000000 kbytes per second.
- 8 to 40000000 kbps 8 to 40000000 kbytes per second.
- 1 to 60000000 pps 1 to 60000000 packets per second.
Related Command
tx-queue (Helix) places the switch in tx-queue configuration mode.
switch(config)# interface ethernet 17
switch(config-if-Et17)# tx-queue 4
switch(config-if-Et17-txq-4)# bandwidth guaranteed 1000 kbps
switch(config-if-Et17-txq-4)# show qos interfaces ethernet 17
Ethernet17/3:
Trust Mode: COS
Default COS: 0
Default DSCP: 0
Port shaping rate: disabled
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
5 - / - ( - ) - / - ( - ) SP / SP
4 1 / 1 ( Mbps ) - / - ( - ) SP / SP
3 - / - ( - ) - / - ( - ) SP / SP
2 - / - ( - ) - / - ( - ) SP / SP
1 - / - ( - ) - / - ( - ) SP / SP
0 - / - ( - ) - / - ( - ) SP / SP
Note: Values are displayed as Operational/Configured
switch(config-if-Et17-txq-4)#bandwidth guaranteed (Trident II)
The bandwidth guaranteed command specifies the minimum bandwidth for outbound traffic on the transmit queue. By default, no bandwidth is guaranteed to any transmit queue.
The no bandwidth guaranteed and default bandwidth guaranteed commands remove the minimum bandwidth guarantee on the transmit queue by deleting the corresponding bandwidth guaranteed command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
bandwidth guaranteed rate DATA_MIN
no bandwidth guaranteed
default bandwidth guaranteed
Parameters
- 8 to 40000000 kbytes per second.
- 8 to 40000000 kbps kbytes per second.
- 1 to 60000000pps packets per second.
Related Command
tx-queue (Trident II) places the switch in tx-queue configuration mode.
switch(config)# interface ethernet 17/3
switch(config-if-Et17/3)# tx-queue 4
switch(config-if-Et17/3-txq-4)# bandwidth guaranteed 1000 kbps
switch(config-if-Et17/3-txq-4)# show qos interfaces ethernet 17/3
Ethernet17/3:
Trust Mode: COS
Default COS: 0
Default DSCP: 0
Port shaping rate: disabled
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
5 - / - ( - ) - / - ( - ) SP / SP
4 1 / 1 ( Mbps ) - / - ( - ) SP / SP
3 - / - ( - ) - / - ( - ) SP / SP
2 - / - ( - ) - / - ( - ) SP / SP
1 - / - ( - ) - / - ( - ) SP / SP
0 - / - ( - ) - / - ( - ) SP / SP
Note: Values are displayed as Operational/Configured
switch(config-if-Et17/3-txq-4)#bandwidth percent (Arad/Jericho)
The bandwidth percent command configures the bandwidth share of the transmit queue when configured for round robin priority. Bandwidth is allocated to all queues based on the cumulative configured bandwidth of all the port’s round robin queues.
The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
The no bandwidth percent and default bandwidth percent commands restore the default bandwidth share of the transmit queue by removing the corresponding bandwidth percent command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
bandwidth percent proportion
no bandwidth percent
default bandwidth percent
Parameters
proportion Bandwidth percentage assigned to queues. Values range from 1 to 100.
Related Command
tx-queue (Arad/Jericho) places the switch in tx-queue configuration mode.
- These commands configure queues 0 through
3 (interface ethernet
3/5/1) as round robin, then allocate bandwidth for three
queues at 30% and one queue at
10%.
switch(config)# interface ethernet 3/5/1 switch(config-if-Et3/5/1)# tx-queue 3 switch(config-if-Et3/5/1-txq-3)# no priority switch(config-if-Et3/5/1-txq-3)# bandwidth percent 10 switch(config-if-Et3/5/1-txq-3)# tx-queue 2 switch(config-if-Et3/5/1-txq-2)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-2)# tx-queue 1 switch(config-if-Et3/5/1-txq-1)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-1)# tx-queue 0 switch(config-if-Et3/5/1-txq-0)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-0)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 10 / 10 - / - ( - ) RR / RR D 2 30 / 30 - / - ( - ) RR / SP D 1 30 / 30 - / - ( - ) RR / SP D 0 30 / 30 - / - ( - ) RR / SP D switch(config-if-Et3/5/1-txq-0)# - These commands re-configure the bandwidth share of the fourth queue at
30%.
switch(config-if-Et3/5/1-txq-0)# tx-queue 3 switch(config-if-Et3/5/1-txq-3)# bandwidth percent 30 switch(config-if-Et3/5/1-txq-3)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Port shaping rate: disabled Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 24 / 30 - / - ( - ) RR / RR D 2 24 / 30 - / - ( - ) RR / SP D 1 24 / 30 - / - ( - ) RR / SP D 0 24 / 30 - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured switch(config-if-Et3/5/1-txq-3)# - These commands configure the bandwidth share of the fourth queue at
2%.
switch(config-if-Et3/5/1-txq-3)# bandwidth percent 2 switch(config-if-Et3/5/1-txq-3)# show qos interfaces ethernet 3/5/1 Ethernet3/5/1: Port shaping rate: disabled Tx Bandwidth Shape Rate Priority ECN Queue (percent) (units) ----------------------------------------------------- 7 - / - - / - ( - ) SP / SP D 6 - / - - / - ( - ) SP / SP D 5 - / - - / - ( - ) SP / SP D 4 - / - - / - ( - ) SP / SP D 3 2 / 2 - / - ( - ) RR / RR D 2 30 / 30 - / - ( - ) RR / SP D 1 30 / 30 - / - ( - ) RR / SP D 0 30 / 30 - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured switch(config-if-Et3/5/1-txq-3)#
bandwidth percent (FM6000)
The bandwidth percent command configures the bandwidth share of the transmit queue when configured for round robin priority. Bandwidth is allocated to all queues based on the cumulative configured bandwidth of all the port’s round robin queues.
The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
The no bandwidth percent and default bandwidth percent commands restore the default bandwidth share of the transmit queue by removing the corresponding bandwidth percent command running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
bandwidth percent proportion
no bandwidth percent
default bandwidth percent
Parameters
proportion Configured bandwidth percentage. Value ranges from 1 to 100. Default value is 0.
Related Command
tx-queue (FM6000) places the switch in tx-queue configuration mode.
- These commands configure queues 0 through
3 (interface Ethernet
19) as round robin, then allocate bandwidth for three queues
at 30% and one queue at
10%.
switch(config)# interface Ethernet 19 switch(config-if-Et19)# tx-queue 3 switch(config-if-Et19-txq-3)# no priority switch(config-if-Et19-txq-3)# bandwidth percent 10 switch(config-if-Et19-txq-3)# tx-queue 2 switch(config-if-Et19-txq-2)# bandwidth percent 30 switch(config-if-Et19-txq-2)# tx-queue 1 switch(config-if-Et19-txq-1)# bandwidth percent 30 switch(config-if-Et19-txq-1)# tx-queue 0 switch(config-if-Et19-txq-0)# bandwidth percent 30 switch(config-if-Et19-txq-0)# show qos interface ethernet 19 Ethernet19: Trust Mode: COS Default COS: 0 Default DSCP: 0 Port shaping rate: disabled Tx Bandwidth Bandwidth Shape Rate Priority ECN/WRED Queue (percent) Guaranteed (units) units) ----------------------------------------------------------------------- 7 - / - - / - ( - ) - / - ( - ) SP / SP D 6 - / - - / - ( - ) - / - ( - ) SP / SP D 5 - / - - / - ( - ) - / - ( - ) SP / SP D 4 - / - - / - ( - ) - / - ( - ) SP / SP D 3 10 / 10 - / - ( - ) - / - ( - ) RR / RR D 2 30 / 30 - / - ( - ) - / - ( - ) RR / SP D 1 30 / 30 - / - ( - ) - / - ( - ) RR / SP D 0 30 / 30 - / - ( - ) - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured Legend: RR -> Round Robin SP -> Strict Priority - -> Not Applicable / Not Configured ECN/WRED: L -> Queue Length ECN Enabled W -> WRED Enabled D -> Disabled - These commands re-configure the bandwidth share of transmit queue
3 at
30%.
cp118.14:04:20# config cp118.14:04:23(config)# interface ethernet 19 cp118.14:04:47(config-if-Et19-txq-0)# tx-queue 3 cp118.14:04:59(config-if-Et19-txq-3)# bandwidth percent 30 cp118.14:05:16(config-if-Et19-txq-3)# show qos interface ethernet 19 Ethernet19: Trust Mode: COS Default COS: 0 Default DSCP: 0 Port shaping rate: disabled Tx Bandwidth Bandwidth Shape Rate Priority ECN/WRED Queue (percent) Guaranteed (units) (units) ------------------------------------------------------------------------ 7 - / - - / - ( - ) - / - ( - ) SP / SP D 6 - / - - / - ( - ) - / - ( - ) SP / SP D 5 - / - - / - ( - ) - / - ( - ) SP / SP D 4 - / - - / - ( - ) - / - ( - ) SP / SP D 3 24 / 30 - / - ( - ) - / - ( - ) RR / RR D 2 24 / 30 - / - ( - ) - / - ( - ) RR / SP D 1 24 / 30 - / - ( - ) - / - ( - ) RR / SP D 0 24 / 30 - / - ( - ) - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured Legend: RR -> Round Robin SP -> Strict Priority - -> Not Applicable / Not Configured ECN/WRED: L -> Queue Length ECN Enabled W -> WRED Enabled D -> Disabled - These commands re-configure the bandwidth share of transmit queue
3 at
2%.
cp118.14:09:37(config-if-Et19-txq-3)# bandwidth percent 2 cp118.14:12:56(config-if-Et19-txq-3)# show qos interface ethernet 19 Ethernet19: Trust Mode: COS Default COS: 0 Default DSCP: 0 Port shaping rate: disabled Tx Bandwidth Bandwidth Shape Rate Priority ECN/WRED Queue (percent) Guaranteed (units) (units) ---------------------------------------------------------------------- 7 - / - - / - ( - ) - / - ( - ) SP / SP D 6 - / - - / - ( - ) - / - ( - ) SP / SP D 5 - / - - / - ( - ) - / - ( - ) SP / SP D 4 - / - - / - ( - ) - / - ( - ) SP / SP D 3 2 / 2 - / - ( - ) - / - ( - ) RR / RR D 2 30 / 30 - / - ( - ) - / - ( - ) RR / SP D 1 30 / 30 - / - ( - ) - / - ( - ) RR / SP D 0 30 / 30 - / - ( - ) - / - ( - ) RR / SP D Note: Values are displayed as Operational/Configured Legend: RR -> Round Robin SP -> Strict Priority - -> Not Applicable / Not Configured ECN/WRED: L -> Queue Length ECN Enabled W -> WRED Enabled D -> Disabled
bandwidth percent (Petra)
The bandwidth percent command configures the bandwidth share of the transmit queue when configured for round robin priority. Bandwidth is allocated to all queues based on the cumulative configured bandwidth of all the port’s round robin queues.
The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
The no bandwidth percent and default bandwidth percent commands restore the default bandwidth share of the transmit queue by removing the corresponding bandwidth percent command running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
bandwidth percent proportion
no bandwidth percent
default bandwidth percent
Parameters
proportionBandwidth percentage assigned to queues. Values range from 1 to 100.
Related Command
tx-queue (Petra)places the switch in tx-queue configuration mode.
- These commands configure queues 0 through
3 (interface ethernet
3/28) as round robin, then allocate bandwidth for three
queues at 30% and one queue at
10%.
switch(config)# interface ethernet 3/28 switch(config-if-Et3/28)# tx-queue 3 switch(config-if-Et3/28-txq-3)# no priority switch(config-if-Et3/28-txq-3)# bandwidth percent 10 switch(config-if-Et3/28-txq-3)# tx-queue 2 switch(config-if-Et3/28-txq-2)# bandwidth percent 30 switch(config-if-Et3/28-txq-2)# tx-queue 1 switch(config-if-Et3/28-txq-1)# bandwidth percent 30 switch(config-if-Et3/28-txq-1)# tx-queue 0 switch(config-if-Et3/28-txq-0)# bandwidth percent 30 switch(config-if-Et3/28-txq-0)# show qos interface ethernet 3/28 Ethernet3/28: Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 10 disabled round-robin 2 30 disabled round-robin 1 30 disabled round-robin 0 30 disabled round-robin switch(config-if-Et3/28-txq-0)# - These commands re-configure the bandwidth share of the fourth queue at
30%.
switch(config-if-Et3/28-txq-0)# tx-queue 3 switch(config-if-Et3/28-txq-3)# bandwidth percent 30 switch(config-if-Et3/28-txq-3)# show qos interface ethernet 3/28 Ethernet3/28: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 24 disabled round-robin 2 24 disabled round-robin 1 24 disabled round-robin 0 24 disabled round-robin switch(config-if-Et3/28-txq-3)# - These commands configure the bandwidth share of the fourth queue at
2%.
switch(config-if-Et3/28)# tx-queue 3 switch(config-if-Et3/28-txq-3)# bandwidth percent 2 switch(config-if-Et3/28-txq-3)# show qos interface ethernet 3/28 Ethernet3/28: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 2 disabled round-robin 2 30 disabled round-robin 1 30 disabled round-robin 0 30 disabled round-robin switch(config-if-Et3/28-txq-3)#
bandwidth percent (Trident and Tomahawk)
The bandwidth percent command configures the bandwidth share of the transmit queue when configured for round robin priority. Bandwidth is allocated to all queues based on the cumulative configured bandwidth of all the port’s round robin queues.
The cumulative operational bandwidth of all round robin queues is always less than or equal to 100%. If the cumulative configured bandwidth is greater than 100%, each port’s operational bandwidth is its configured bandwidth divided by the cumulative configured bandwidth.
The no bandwidth percent and default bandwidth percent commands restore the default bandwidth share of the transmit queue by removing the corresponding bandwidth percent command running-config.
Command Mode
Mc-Tx-Queue configuration
Uc-Tx-Queue configuration
Command Syntax
bandwidth percent proportion
no bandwidth percent
default bandwidth percent
Parameters
proportion Bandwidth percentage assigned to queues. Values range from 1 to 100.
- mc-tx-queue places the switch in mc-tx-queue configuration mode.
- uc-tx-queue places the switch in uc-tx-queue configuration mode.
- These commands configure unicast transmit queue 3 (and
all other queues of lower priority) as round robin, then allocate bandwidth for
unicast transmit queues 1,
2, and 3 at
30% and multicast transmit queue
1 at 10%.
switch(config)# interface ethernet 7 switch(config-if-Et7)# uc-tx-queue 3 switch(config-if-Et7-uc-txq-3)# no priority switch(config-if-Et7-uc-txq-3)# bandwidth percent 30 switch(config-if-Et7-uc-txq-3)# uc-tx-queue 2 switch(config-if-Et7-uc-txq-2)# bandwidth percent 30 switch(config-if-Et7-uc-txq-2)# uc-tx-queue 1 switch(config-if-Et7-uc-txq-1)# bandwidth percent 30 switch(config-if-Et7-uc-txq-1)# mc-tx-queue 1 switch(config-if-Et7-mc-txq-1)# bandwidth percent 10 switch(config-if-Et7-mc-txq-1)# show qos interfaces ethernet 7 Ethernet7: Trust Mode: COS Default COS: 0 Default DSCP: 0 Port shaping rate: disabled Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A disabled strict 0 UC4 N/A disabled strict 0 MC2 N/A disabled strict 0 UC3 30 disabled round-robin 0 UC2 30 disabled round-robin 0 MC1 10 disabled round-robin 0 UC1 30 disabled round-robin 0 UC0 0 disabled round-robin 0 MC0 0 disabled round-robin 0 switch(config-if-Et7-mc-txq-1)# - These commands re-configure the bandwidth share of unicast queue
3 at
55%.
switch(config-if-Et7-mc-txq-1)# uc-tx-queue 3 switch(config-if-Et7-uc-txq-3)# bandwidth percent 55 switch(config-if-Et7-uc-txq-3)# show qos interface ethernet 7 Ethernet7: Trust Mode: COS Default COS: 0 Default DSCP: 0 Port shaping rate: disabled Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A disabled strict 0 UC4 N/A disabled strict 0 MC2 N/A disabled strict 0 UC3 44 disabled round-robin 0 UC2 24 disabled round-robin 0 MC1 8 disabled round-robin 0 UC1 24 disabled round-robin 0 UC0 0 disabled round-robin 0 MC0 0 disabled round-robin 0 switch(config-if-Et7-uc-txq-3)#
color
Use the color command for the ability to configure the color extended community in route-map set clauses and in an extcommunity-list for inbound and outbound policy application.
Command Mode
Route-maps and extcommunity-lists
Command Syntax
color COLOR-VALUE [color-only [exact-match | [endpoint-match [any | null]]]]
- COLOR-VALUE A single policy color value, range 0 to 4294967295.
- color-onlyAllows configuration of color-only bits.
- exact-matchExplicitly sets the color-only bits of the extended community to 00 (optional).
- endpoint-match anySets the color-only bits of the extended community to 10.
- endpoint-match null Sets the color-only bits of the extended community to 01.
Example
switch(config)# route-map foo
switch(config0route-map-foo)# set community color 2 color-only endpoint-match anydscp to traffic-class (DSCP map)
The default dscp to traffic-class and no dscp to traffic-class commands restore the global map values for the given DSCP classes.
Command Mode
DSCP Map Configuration
Command Syntax
dscp dscp_classes to traffic-class traffic_class
default dscp dscp_classes to traffic-class
no dscp dscp_classes to traffic-class
Parameters
- dscp_classesThe DSCP class or classes to map to a new traffic-class value.These can be provided as a single value, a range given with a hyphen (such as 20-25), a comma separated list (such as 1,4,9), or a combination (such as 20-25, 35). The range for each value is 0-63.
- traffic_classThe traffic class to map the specified DSCP class or classes to.
Example
switch(config)#qos map dscp to traffic-class name map1
switch(config-dscp-map-map1)#dscp 35 to traffic-class 7
switch(config-dscp-map-map1)#dscp 20-25 to traffic-class 6hardware access-list qos resource sharing vlan in
The hardware access-list qos resource sharing vlan in command enables the ACL based QoS resources sharing on a VLAN interface.
The no hardware access-list qos resource sharing vlan in disables the ACL based QoS resources sharing on a VLAN interface. By default this function is disabled.
Command Mode
Global Configuration
Command Syntax
hardware access-list qos resource sharing vlan in
no hardware access-list qos resource sharing vlan in
switch(config)# hardware access-list qos resource sharing vlan ininterface fabric (Trident II)
The interface fabric command places the switch in Fabric-interface configuration mode and allows the user to attach the QoS profile to the fabric interface of the switch.
Command Mode
Global Configuration
Command Syntax
interface fabric
switch(config)# interface fabric
switch(config-if-fabric)# ip extcommunity-list
The ip extcommunity-list command adds a color extended community to an extcommunity-list. Multiple color extended communities can be added to the list. Negating the command removes the corresponding color extended community from the list.
Command Mode
Configuration mode
Command Syntax
ip extcommunity-list WORD [permit | deny][COLOR-EXPRESSION]
no ip extcommunity-list WORD [permit | deny] COLOR-EXPRESSION]
default ip extcommunity-list WORD [permit | deny][COLOR-EXPRESSION]
- WORDCommunity list name.
- permitSpecifies community to accept.
- denySpecifies comminity to reject.
- COLOR-EXPRESSIONColor extended community.
arista(config)# ip extcommunity-list foo permit color 1 color 2
arista(config)# ip extcommunity-list bar permit color 3 color-only endpoint-match null color 4 color-only endpoint-match anymc-tx-queue
The mc-tx-queue command places the switch in mc-tx-queue configuration mode to configure a multicast transmit queue on the configuration mode interface. Mc-tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
- Priority Group 1: UC7, UC6, MC3
- Priority Group 0: UC5, UC4, MC2, UC3, UC2, MC1, UC1, UC0, MC0
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no mc-tx-queue and default mc-tx-queue commands remove the configuration for the specified transmit queue by deleting the all corresponding mc-tx-queue mode commands from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
mc-tx-queue queue_level
Parametersqueue_level The multicast transmit queue number. Values range from 0 to 3.
Related Command
Configures unicast transmit queues on Trident and Tomahawk platform switches.
switch(config)# interface ethernet 5
switch(config-if-Et5)# mc-tx-queue 3
switch(config-if-Et5-mc-txq-3)#platform petraA traffic-class
The platform petraA traffic-class command configures the default traffic class used by all ports on a specified chip. The default traffic class is implemented by Petra platform switches to replace qos cos and qos dscp commands. Traffic class values range from 0 to 7. The default traffic class is 1.
- CoS trusted ports: inbound untagged packets are assigned to the default traffic class. Tagged packets are assigned to the traffic class that corresponds to the contents of its CoS field.
- DSCP trusted ports: inbound non-IP packets are assigned to the default traffic class. IP packets are assigned to the traffic class that corresponds to the contents of its DSCP field.
- Untrusted ports: all inbound packets are assigned to the default traffic class.
The no platform petraA traffic-class and default platform petraA traffic-class commands restore the default traffic class of one for all ports on the specified chips by deleting the corresponding platform petraA traffic-class command from running-config.
Command Mode
Global Configuration
Command Syntax
platform petraA [CHIP_NAME] traffic-class tc_value
no platform petraA [CHIP_NAME] traffic-class
default platform petraA [CHIP_NAME] traffic-class
Parameters
-
- no parameter All ports on the switch.
- module cardX All ports on specified linecard (7500 Series).
- petra cardX / chipY All ports on PetraA chip chipY on linecard cardX (7500 Series).
- petra -chipZ All ports on PetraA chip chipZ (7048 Series)
7500 Series
Switches can contain up to eight linecards. CardX varies from 3 to 10.
- 0 controls ports 1 through 8:
- 1 controls ports 9 through 16.
- 2 controls ports 17 through 24.
- 3 controls ports 25 through 32.
- 4 controls ports 33 through 40.
- 5 controls ports 41 through 48.
7048 Series
- 0 controls ports 1 through 32.
- 1 controls ports 33 through 52.
- tc_value Traffic class value. Values range from 0 to 7. Default value is 1.
Related Command
show platform petraA traffic-class displays the traffic class assignment on all specified Petra chips.
switch(config)# platform petraA petra5/3 traffic-class 6
switch(config)#priority (Arad/Jericho)
- strict priority: contents are removed from the queue - subject to maximum bandwidth limits, before data from lower priority queues. The default setting on all queues is strict priority.
- round robin priority: contents are removed proportionately from all round robin queues - subject to maximum bandwidth limits assigned to the strict priority queues.
Tx-queue 7 is set to strict priority and is not configurable.
When a queue is configured as a round robin queue, all lower priority queues also function as round robin queues. A queue’s numerical label denotes its priority: higher labels denote higher priority. Tx-queue 6 has higher priority than Tx-queue 5, and Tx-queue 0 has the lowest priority.
The priority strict and default priority commands configure a transmit queue to function as a strict priority queue unless a higher priority queue is configured as a round robin queue.
The no priority command configures a transmit queue as a round robin queue. All lower priority queues also function as round robin queues regardless of their configuration.
Command Mode
Tx-Queue Configuration
Command Syntax
priority strict
no priority
default priority
Related Command
tx-queue (Arad/Jericho) places the switch in tx-queue configuration mode.
- Displays the default state of all transmit queues.
- Configures transmit queue 3 as a round robin queue.
- Displays the effect of the no priority command on all transmit queues on the interface.
switch(config)# interface ethernet 3/4/1
switch(config-if-Et3/4/1)# show qos interfaces ethernet 3/4/1
Ethernet3/4/1:
Tx Bandwidth Shape Rate Priority ECN
Queue (percent) (units)
-----------------------------------------------------
7 - / - - / - ( - ) SP / SP D
6 - / - - / - ( - ) SP / SP D
5 - / - - / - ( - ) SP / SP D
4 - / - 999 / 1000 ( Mbps ) SP / SP D
3 - / - 999 / 1000 ( Mbps ) SP / SP D
2 - / - - / - ( - ) SP / SP D
1 - / - - / - ( - ) SP / SP D
0 - / - - / - ( - ) SP / SP D
Note: Values are displayed as Operational/Configured
switch(config-if-Et3/4/1)# tx-queue 3
switch(config-if-Et3/4/1-txq-3)# no priority
switch(config-if-Et3/4/1-txq-3)# show qos interfaces ethernet 3/4/1
Ethernet3/4/1:
Tx Bandwidth Shape Rate Priority ECN
Queue (percent) (units)
-----------------------------------------------------
7 - / - - / - ( - ) SP / SP D
6 - / - - / - ( - ) SP / SP D
5 - / - - / - ( - ) SP / SP D
4 - / - 999 / 1000 ( Mbps ) SP / SP D
3 25 / - 999 / 1000 ( Mbps ) RR / RR D
2 25 / - - / - ( - ) RR / SP D
1 25 / - - / - ( - ) RR / SP D
0 25 / - - / - ( - ) RR / SP D
Note: Values are displayed as Operational/Configured
switch(config-if-Et3/4/1-txq-3)#priority (FM6000)
- strict priority: contents are removed from the queue - subject to maximum bandwidth limits, before data from lower priority queues. The default setting on all queues is strict priority.
- round robin priority: contents are removed proportionately from all round robin queues - subject to maximum bandwidth limits assigned to the strict priority queues.
When a queue is configured as a round robin queue, all lower priority queues also function as round robin queues. A queue’s numerical label denotes its priority: higher labels denote higher priority. Tx-queue 6 has higher priority than Tx-queue 5, and Tx-queue 0 has the lowest priority.
The priority strict and default priority commands configure a transmit queue to function as a strict priority queue unless a higher priority queue is configured as a round robin queue.
The no priority command configures a transmit queue as a round robin queue. All lower priority queues also function as round robin queues regardless of their configuration.
Command Mode
Tx-Queue Configuration
Command Syntax
priority strict
no priority
default priority
Related Command
tx-queue (FM6000) places the switch in tx-queue configuration mode.
- Displays the default state of all transmit queues.
- Configures transmit queue 3 as a round robin queue.
- Displays the effect of the no priority command on
all transmit queues on the
interface.
switch(config)# interface ethernet 19 switch(config-if-Et19)# show qos interface ethernet 19 Ethernet19: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 N/A disabled strict 2 N/A disabled strict 1 N/A disabled strict 0 N/A disabled strict switch(config-if-Et19)# tx-queue 3 switch(config-if-Et19-txq-3)# no priority switch(config-if-Et19-txq-3)# show qos interface ethernet 19 Ethernet19: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 25 disabled round-robin 2 25 disabled round-robin 1 25 disabled round-robin 0 25 disabled round-robin switch(config-if-Et19-txq-3)#
priority (Petra)
- strict priority: contents are removed from the queue - subject to maximum bandwidth limits, before data from lower priority queues. The default setting on all queues is strict priority.
- round robin priority: contents are removed proportionately from all round robin queues - subject to maximum bandwidth limits assigned to the strict priority queues.
Tx-queue 7 is set to strict priority and is not configurable.
When a queue is configured as a round robin queue, all lower priority queues also function as round robin queues. A queue’s numerical label denotes its priority: higher labels denote higher priority. Tx-queue 6 has higher priority than Tx-queue 5, and Tx-queue 0 has the lowest priority.
The priority strict and default priority commands configure a transmit queue to function as a strict priority queue unless a higher priority queue is configured as a round robin queue.
The no priority command configures a transmit queue as a round robin queue. All lower priority queues also function as round robin queues regardless of their configuration.
Command Mode
Tx-Queue Configuration
Command Syntax
priority strict
no priority
default priority
Related Command
tx-queue (Petra) places the switch in tx-queue configuration mode.
- Displays the default state of all transmit queues.
- Configures transmit queue 3 as a round robin queue.
- Displays the effect of the no priority command on
all transmit queues on the
interface.
switch(config)# interface ethernet 3/28 switch(config-if-Et3/28)# show qos interface ethernet 3/28 Ethernet3/28: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 N/A disabled strict 2 N/A disabled strict 1 N/A disabled strict 0 N/A disabled strict switch(config-if-Et3/28)# tx-queue 3 switch(config-if-Et3/28-txq-3)# no priority switch(config-if-Et3/28-txq-3)# show qos interface ethernet 3/28 Ethernet3/28: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority (percent) (Kbps) ----------------------------------------------- 7 N/A disabled strict 6 N/A disabled strict 5 N/A disabled strict 4 N/A disabled strict 3 25 disabled round-robin 2 25 disabled round-robin 1 25 disabled round-robin 0 25 disabled round-robin switch(config-if-Et3/28-txq-3)#
priority (Trident and Tomahawk)
- strict priority: contents are removed from the queue - subject to maximum bandwidth limits, before data from lower priority queues. The default setting on all other queues is strict priority.
- round robin priority: contents are removed proportionately from all round robin queues - subject to maximum bandwidth limits assigned to the strict priority queues.
- Priority Group 1: UC7, UC6, MC3
- Priority Group 0: UC5, UC4, MC2, UC3, UC2, MC1, UC1, UC0, MC0
Priority group 1 queues are strict priority queues and are not configurable as round robin. Priority 0 queues are strict priority by default and are configurable as round robin. When a queue is configured as a round robin queue, all lower priority queues automatically function as round robin queues.
The priority strict and default priority commands configure a transmit queue to function as a strict priority queue unless a higher priority queue is configured as a round robin queue.
The no priority command configures a transmit queue as a round robin queue. All lower priority queues also function as round robin queues regardless of their configuration.
Command Mode
Mc-Tx-Queue configuration
Uc-Tx-Queue configuration
Command Syntax
priority strict
no priority
default priority
- mc-tx-queue places the switch in mc-tx-queue configuration mode.
- uc-tx-queue places the switch in uc-tx-queue configuration mode.
- Displays the default state of all transmit queues.
- Configures transmit queue 3 as a round robin queue.
- Displays the effect of the no priority command on
all transmit queues on the
interface.
switch(config) #interface ethernet 7 switch(config-if-Et7)# show qos interface ethernet 7 Ethernet7: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A disabled strict 0 UC4 N/A disabled strict 0 MC2 N/A disabled strict 0 UC3 N/A disabled strict 0 UC2 N/A disabled strict 0 MC1 N/A disabled strict 0 UC1 N/A disabled strict 0 UC0 N/A disabled strict 0 MC0 N/A disabled strict 0 switch(config-if-Et7)# uc-tx-queue 3 switch(config-if-Et7-uc-txq-3)# no priority switch(config-if-Et7-uc-txq-3)# show qos interface ethernet 7 Ethernet7: Trust Mode: COS Tx-Queue Bandwidth Shape Rate Priority Priority Group (percent) (Kbps) ---------------------------------------------------------------- UC7 N/A disabled strict 1 UC6 N/A disabled strict 1 MC3 N/A disabled strict 1 UC5 N/A disabled strict 0 UC4 N/A disabled strict 0 MC2 N/A disabled strict 0 UC3 20 disabled round-robin 0 UC2 16 disabled round-robin 0 MC1 16 disabled round-robin 0 UC1 16 disabled round-robin 0 UC0 16 disabled round-robin 0 MC0 16 disabled round-robin 0 switch(config-if-Et7-uc-txq-3)#
qos cos
The qos cos command specifies the default class of service (CoS) value of the configuration mode interface. CoS values range from 0 to 7. Default value is 0.
- CoS trusted ports: the default CoS value determines the traffic class for inbound untagged packets. Tagged packets are assigned to the traffic class that corresponds to the contents of its CoS field.
- Untrusted ports: the default CoS value determines the traffic class for all inbound packets.
- CoS trusted ports: inbound untagged packets are assigned to the default traffic class, as configured by platform petraA traffic-class. Tagged packets are assigned to the traffic class that corresponds to the contents of its CoS field.
- Untrusted ports: all inbound packets are assigned to the default traffic class.
The no qos cos and default qos cos commands restore the port’s default CoS value to zero by deleting the corresponding qos cos command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
qos cos cos_value
no qos cos
default qos cos
Parameters
cos_valueCoS value assigned to port. Value ranges from 0 to 7. Default value is 0.
switch(config-if-Et8)# qos cos 4
switch(config-if-Et8)#qos dscp
- Arad, Jericho, fm6000, Trident, Tomahawk, and Trident II platform switches:
- non-IP packets: default DSCP value specified by qos dscp determines the traffic class.
- IP packets: assigned to the traffic class corresponding to its DSCP field contents.
- Petra platform switches:
- non-IP packets: assigned to default traffic class configured by platform petraA traffic-class.
- IP packets: assigned to the traffic class corresponding to its DSCP field contents.
The no qos dscp and default qos dscp commands restore the port’s default DSCP value to zero by deleting the corresponding qos dscp command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
qos dscp dscp_value
no qos dscp
default qos dscp
Parameters
dscp_value DSCP value assigned to the port. Value ranges from 0 to 63. Default value is 0.
switch(config)# interface ethernet 7
switch(config-if-Et7)# qos dscp 44
switch(config-if-Et7)qos map cos
The qos map cos command associates a traffic class to a list of class of service (CoS) settings. Multiple commands create a complete CoS to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s CoS field or the port upon which it is received.
The no qos map cos and default qos map cos commands restore the specified CoS values to their default traffic class setting by deleting the corresponding qos map cos statements from running-config.
Command Mode
Global Configuration
Command Syntax
qos map cos cos_value_1 [cos_value_2 ... cos_value_n] to traffic-class tc_value
no qos map cos cos_value_1 [cos_value_2 ... cos_value_n]
default qos map cos cos_value_1 [cos_value_2 ... cos_value_n]
- cos_value_x Class of Service (CoS) value. Value ranges from 0 to 7.
- tc_value Traffic class value. Value range varies by platform.
Default CoS to traffic class map varies by platform (Table 35).
Default Inbound CoS to Traffic Class Map
Table 35 displays the default CoS to traffic class map for each platform.
| Inbound CoS | untagged | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Arad /Jericho) | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (FM6000) | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Helix) | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Petra) | Assigned default traffic class | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Trident and Tomahawk) | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Trident II) | Derived: use default CoS as inbound CoS | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
- qos cos specifies the default CoS.
- platform petraA traffic-class specifies the default traffic class.
switch(config)# qos map cos 1 3 5 7 to traffic-class 5
switch(config)#qos map dscp
The qos map dscp command associates a traffic class to a set of Differentiated Services Code Point (DSCP) values. Multiple commands create a complete DSCP to traffic class map. The switch uses this map to assign a traffic class to data packets on the basis of the packet’s DSCP field or the chip upon which it is received.
This command configures the global DSCP to traffic-class map. To create additional named maps that can be attached to specific VRFs, use the qos map dscp to traffic-class command with the name option.
The no qos map dscp and default qos map dscp commands restore the specified DSCP values to their default traffic class settings by deleting corresponding qos map dscp statements from running-config.
Command Mode
Global Configuration
Command Syntax
qos map dscp dscpv_1 [dscpv_2...dscpv_n] to traffic-class tc_value
no qos map dscp dscpv_1 [dscpv_2...dscpv_n]
default qos map dscp dscpv_1 [dscpv_2...dscpv_n]
- dscpv_x Differentiated Services Code Point (DSCP) value. Value ranges from 0 to 63.
- tc_value Traffic class value. Value range varies by platform.
Default map varies by platform (Table 36).
Default Inbound DSCP to Traffic Class Map
Table 36 displays the default DSCP to traffic class map for each platform.
| Inbound DSCP | 0-7 | 8-15 | 16-23 | 24-31 | 32-39 | 40-47 | 48-55 | 56-63 |
| Traffic Class (Arad /Jericho) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (FM6000) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Helix) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Petra) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Trident and Tomahawk) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| Traffic Class (Trident II) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
switch(config)# qos map dscp 12 13 25 37 to traffic-class 3
switch(config)#qos map dscp to traffic-class
The no and default forms of the command remove the specified custom map.
Command Mode
Global Configuration
Command Syntax
qos map dscp to traffic-class name map_name
no qos map dscp to traffic-class name map_name
default qos map dscp to traffic-class name map_name
Parameters
- map_name The name of the map to configure. If the map does not exist, it is created as a copy of the global DSCP-to-traffic-class map.
Example
switch(config)#qos map dscp to traffic-class name map1
switch(config-dscp-map-map1)#qos map dscp to traffic-class (MPLS tunnel termination VRF)
The qos map dscp to traffic-class command assigns a DSCP-to-traffic-class map to a VRF, replacing the global map or previous custom map. The switch uses this map to assign a traffic class to data packets routed to this VRF on the basis of the DSCP fields of these packets.
The no qos map dscp to traffic-class and default qos map dscp to traffic-map commands remove the assignment of a custom map from the VRF, restoring the global map. default traffic class settings by deleting corresponding qos map dscp statements from running-config.
Command Mode
MPLS Tunnel Termination VRF Configuration
Command Syntax
qos map dscp to traffic-class map_name
no qos map dscp to traffic-class map_name
default qos map dscp to traffic-class map_name
- map_name DSCP to traffic-class map name.
switch(config)#mpls tunnel termination
switch(config-mpls-tunnel-termination)#vrf newVRF1
switch(config-tunnel-termination-vrf-newVRF1)#qos map dscp to traffic-class map1
switch(config-tunnel-termination-vrf-newVRF1)#exit
switch(config-mpls-tunnel-termination)#vrf newVRF2
switch(config-tunnel-termination-vrf-newVRF2)#qos map dscp to traffic-class map1
switch(config-tunnel-termination-vrf-newVRF2)#exit
switch(config-tunnel-termination)#qos map traffic-class to cos
The qos map traffic-class to cos command associates a class of service (CoS) to a list of traffic classes. Multiple commands create a complete traffic class to CoS map. The switch uses this map in CoS rewrite operations to fill the CoS field in outbound packets. This map is applicable to DSCP trusted ports and untrusted ports. CoS rewrite is disabled on CoS trusted ports. The show qos maps command displays the CoS to traffic class map.
The no qos traffic-class to cos and default qos traffic-class to cos commands restore the specified traffic class values to their default CoS settings by removing the corresponding qos map traffic-class to cos command from running-config.
Command Mode
Global Configuration
Command Syntax
qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to cos cos_value
no qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to cos
default qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to cos
- tc_num_x Traffic class value. Value range varies by switch platform.
- cos_value Class of Service (CoS) value. Value ranges from 0 to 7.
Default Inbound Traffic Class to CoS Map
Table 37 displays the default traffic class to CoS map for each platform.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value (Arad and /Jericho) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value (FM6000) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value (Helix) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value (Petra) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value (Trident and Tomahawk) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
| CoS Rewrite Value (Trident II) | 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 |
switch(config)# qos map traffic-class 1 3 5 to cos 2
switch(config)#qos map traffic-class to dscp
The qos map traffic-class to dscp command associates a Differentiated Services Code Point (DSCP) value to a list of traffic classes. Multiple commands create a complete traffic class to DSCP map. The switch uses this map in DSCP rewrite operations to fill the DSCP field in outbound packets. This map is applicable to CoS trusted ports and untrusted ports but disabled by default on these ports. DSCP rewrite is disabled on DSCP trusted ports. The show qos maps command displays the traffic class to DSCP map.
The no qos traffic-class to dscp and default qos traffic-class to dscp commands restore the specified traffic class values to their default DSCP settings by removing the corresponding qos map traffic-class to dscp command from running-config.
Command Mode
Global Configuration
Command Syntax
qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to dscp dscp_value
no qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to dscp
default qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to dscp
- tc_num_x Traffic class value. Value range varies by switch platform.
- dscp_value Differentiated Services Code Point (DSCP) value. Value ranges from 0 to 63.
Default Inbound Traffic Class to DSCP Map
Table 38 displays the default traffic class to DSCP map for each platform.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| DSCP Rewrite Value (FM6000) | 8 | 0 | 16 | 24 | 32 | 40 | 48 | 56 |
| DSCP Rewrite Value (Helix) | 8 | 0 | 16 | 24 | 32 | 40 | 48 | 56 |
| DSCP Rewrite Value (Trident and Tomahawk) | 8 | 0 | 16 | 24 | 32 | 40 | 48 | 56 |
| DSCP Rewrite Value (Trident II) | 8 | 0 | 16 | 24 | 32 | 40 | 48 | 56 |
switch(config)# qos map traffic-class 1 2 4 to dscp 17
switch(config)#qos map traffic-class to mc-tx-queue
The qos map traffic-class to mc-tx-queue command associates a multicast transmit queue to a list of traffic classes. Multiple commands create a complete traffic class to mc-tx-queue map. The switch uses this map to route outbound packets to transmit queues, which in turn schedules their transmission from the switch. The show qos maps command displays the traffic class to multicast transmit queue map.
The no qos traffic-class to mc-tx-queue and default qos traffic-class to mc-tx-queue commands restore the default traffic class to multicast transmit queue map for the specified traffic class values by removing the corresponding qos map traffic-class to mc-tx-queue command from running-config.
Command Mode
Global Configuration
Command Syntax
qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to mc-tx-queue mtq_value
no qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to mc-tx-queue
default qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to mc-tx-queue
- tc_num_x Traffic class value. Value ranges from 0 to 7.
- mtq_value Multicast transmit queue number. Value ranges from 0 to 3.
Default Inbound Traffic Class to Multicast Transmit Queue Map
Table 39displays the default traffic class to multicast transmit queue map for Trident and Tomahawk platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Multicast Transmit Queue (Trident and Tomahawk) | 0 | 0 | 1 | 1 | 2 | 2 | 3 | 3 |
- qos map traffic-class to uc-tx-queue (Trident and Tomahawk) associates traffic classes to a multicast transmit queue.
- qos map traffic-class to tx-queue (all other platforms) associates traffic classes to a transmit queue.
switch(config)# qos map traffic-class 0 4 5 to mc-tx-queue 2
switch(config)#qos map traffic-class to tx-queue
The qos map traffic-class to tx-queue command associates a transmit queue (tx-queue) to a list of traffic classes. Multiple commands create a complete traffic to tx-queue map. The switch uses this map to route outbound packets to transmit queues, which in turn schedules their transmission from the switch. The show qos maps command displays the transmit queue to traffic class map.
The no qos traffic-class to tx-queue and default qos traffic-class to tx-queue commands restore the specified traffic class values to their default transmit queue settings by removing the corresponding qos map traffic-class to tx-queue command from running-config.
Command Mode
Global Configuration
Command Syntax
qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to tx-queue txq_value
no qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to tx-queue
default qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to tx-queue
- tc_num_x Traffic class value. Value range varies by platform.
- txq_value Transmit queue value. Value range varies by platform.
Restrictions
FM6000: When Priority Flow Control (PFC) is enabled, traffic classes are mapped to their corresponding transmit queues, regardless of existing qos map traffic-class to tx-queue statements.
Arad, Jericho, and Petra: Traffic class 7 always maps to transmit queue 7. This association is not editable.
Default Inbound Traffic Class to Transmit Queue Map
Table 40 displays the transmit queue to traffic class map.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue (Arad /Jericho) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue (FM6000) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue (Helix) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue (Petra) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Transmit Queue (Trident II) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
- qos map traffic-class to mc-tx-queue (Trident and Tomahawk) associates traffic classes to a unicast transmit queue.
- qos map traffic-class to uc-tx-queue (Trident and Tomahawk) associates traffic classes to a multicast transmit queue.
switch(config)# qos map traffic-class 0 4 5 to tx-queue 4
switch(config)#qos map traffic-class to uc-tx-queue
The qos map traffic-class to uc-tx-queue command associates a unicast transmit queue to a list of traffic classes. Multiple commands create a complete traffic class to unicast transmit queue map. The switch uses this map to route outbound packets to transmit queues, which in turn schedules their transmission from the switch. The show qos maps command displays the traffic class to unicast transmit queue map.
The no qos traffic-class to uc-tx-queue and default qos traffic-class to uc-tx-queue commands restore the default traffic class to unicast transmit queue map for the specified traffic class values by removing the corresponding qos map traffic-class to uc-tx-queue command from running-config.
Command Mode
Global Configuration
Command Syntax
qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to uc-tx-queue utq_value
no qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to uc-tx-queue
default qos map traffic-class tc_num_1 [tc_num_2 ... tc_num_n] to uc-tx-queue
- tc_num_x Traffic class value. Value ranges from 0 to 7.
- utq_value Unicast transmit queue number. Value ranges from 0 to 7.
Default Inbound Traffic Class to Unicast Transmit Queue Map
Table 41 displays the default traffic class to Unicast transmit queue map for Trident and Tomahawk platform switches.
| Traffic Class | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Unicast Transmit Queue (Trident and Tomahawk) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
- qos map traffic-class to mc-tx-queue (Trident and Tomahawk) associates traffic classes to a unicast transmit queue.
- qos map traffic-class to tx-queue (all other platforms) associates traffic classes to a transmit queue.
switch(config)# qos map traffic-class 0 4 5 to uc-tx-queue 4
switch(config)#qos profile
The qos profile command places the switch in QoS profile configuration mode and for the specified profile and creates the profile if it does not already exist. QoS profiles are used to apply the same QoS configuration to multiple interfaces.
The no qos profile and default qos profile command deletes the QoS profile from the running configuration.
The exit command returns the switch to global configuration mode.
Command Mode
Global Configuration
Command Syntax
qos profile profile_name
no qos profile profile_name
default qos profile profile_name
Parameter
profile_name QoS profile name.
This command places the switch in QoS profile configuration mode for policy map policy map TP and creates the policy map if it does not already exist.
switch(config)# qos profile TP
switch(config-qos-profile-TP)#qos random-detect ecn allow non-ect chip-based (Tomahawk and Trident)
The qos random-detect ecn allow non-ect chip-based enables per color queue thresholds using color based queue thresholds and drop-precedence values along with drop of non-ect traffic by allowing non-ect and set drop-precedence 1 in a policy map simultaneously.
The no qos random-detect ecn allow non-ect chip-based and default qos random-detect ecn allow non-ect chip-based commands disbales the use of non-ect and set drop-precedence 1 simultaneously in a policy map in the running-config.
Command Mode
Global Configuration
Command Syntax
qos random-detect ecn allow non-ect chip-based
no qos random-detect ecn allow non-ect chip-based
default qos random-detect ecn allow non-ect chip-based
Example
switch(config)# qos random-detect ecn allow non-ect chip-basedqos random-detect ecn global-buffer (Helix)
- 00 Non ECN Capable transport.
- 10 ECN Capable transport.
- 01 ECN Capable transport.
- 11 Congestion encountered.
- Average queue size below minimum threshold: Packets are queued normally.
- Average queue size above maximum threshold: Packets are marked congestion encountered.
- Average queue size between minimum and maximum thresholds. Packets are queued or marked congestion encountered. The proportion of marked packets varies linearly with average queue size:
- 0% are marked when average queue size is less than or equal to minimum threshold.
- 100% are marked when average queue size is greater than or equal to maximum threshold.
When transmitted packets are marked Non ECN Capable, congestion packets are dropped, not marked.
The no qos random-detect ecn global-buffer and default qos random-detect ecn global-buffer commands disables ECN marking for the shared buffer by removing the qos random-detect ecn global-buffer command from running-config.
Command Mode
Global Configuration
Command Syntax
qos random-detect ecn global-buffer minimum-threshold MIN maximum-threshold MAX
no qos random-detect ecn global-buffer
default qos random-detect ecn global-buffer
Guidelines
Packet memory is divided into 46080 208-byte cells, whose allocation is managed by the memory management unit (MMU). The MMU tracks the cells that each entity uses and determines the number of cells that can be allocated to an entity.
Parameters
- MINMinimum threshold. Options include:
- 1 to 19456 segments 208-byte segments units.
- 1 to 4 mbytes Megabyte units.
- 1 to 4046 kbytes Kilobyte units.
- 1 to 4046848 bytes Byte units.
- MAXMaximum threshold. Options include:
- 1 to 19456 segments 208-byte segments units.
- 1 to 4 mbytes Megabyte units.
- 1 to 4046 kbytes Kilobyte units.
- 1 to 4046848 bytes Byte units.
Related Command
random-detect ecn (Helix) enables ECN marking for a unicast transmit queue.
- This command enables ECN marking of unicast packets from the global data pool
and sets the minimum and maximum thresholds at 20 and
500
segments.
switch(config)# qos random-detect ecn global-buffer minimum-threshold 20 segments maximum-threshold 500 segments switch(config)# - This command disables ECN marking of unicast packets from the global data
pool.
switch(config)# no qos random-detect ecn global-buffer switch(config)#
qos random-detect ecn global-buffer (Trident and Tomahawk)
- 00 Non ECN Capable transport.
- 10 ECN Capable transport.
- 01 ECN Capable transport.
- 11 Congestion encountered.
- Average queue size below minimum threshold: Packets are queued normally.
- Average queue size above maximum threshold: Packets are marked congestion encountered.
- Average queue size between minimum and maximum thresholds. Packets are queued or marked congestion encountered. The proportion of marked packets varies linearly with average queue size:
- 0% are marked when average queue size is less than or equal to minimum threshold.
- 100% are marked when average queue size is greater than or equal to maximum threshold.
When transmitted packets are marked Non ECN Capable, congestion packets are dropped, not marked.
The no qos random-detect ecn global-buffer and default qos random-detect ecn global-buffer commands disables ECN marking for the shared buffer by removing the qos random-detect ecn global-buffer command from running-config.
Command Mode
Global Configuration
Command Syntax
qos random-detect ecn global-buffer minimum-threshold MIN maximum-threshold MAX
no qos random-detect ecn global-buffer
default qos random-detect ecn global-buffer
Guidelines
Packet memory is divided into 46080 208-byte cells, whose allocation is managed by the memory management unit (MMU). The MMU tracks the cells that each entity uses and determines the number of cells that can be allocated to an entity.
Parameters
- MINMinimum threshold. Options include:
- 1 to 46080 segments 208-byte segments units.
- 1 to 9 mbytes Megabyte units.
- 1 to 9584 kbytes Kilobyte units.
- 1 to 9584640 bytes Byte units.
- MAXMaximum threshold. Options include:
- 1 to 46080 segments 208-byte segments units.
- 1 to 9 mbytes Megabyte units.
- 1 to 9584 kbytes Kilobyte units.
- 1 to 9584640 bytes Byte units.
Related Command
random-detect ecn (Trident and Tomahawk) enables ECN marking for a unicast transmit queue.
- This command enables ECN marking of unicast packets from the global data pool
and sets the minimum and maximum thresholds at 20 and
500
segments.
switch(config)# qos random-detect ecn global-buffer minimum-threshold 20 segments maximum-threshold 500 segments switch(config)# - This command disables ECN marking of unicast packets from the global data
pool.
switch(config)# no qos random-detect ecn global-buffer switch(config)#
qos rewrite cos
The qos rewrite cos command enables the rewriting of the CoS field for outbound tagged packets that were received on DSCP trusted ports and untrusted ports. CoS rewrite is always disabled on CoS trusted ports. The CoS value that is written into the packet is based on the data stream’s traffic class. CoS rewriting is active by default.
The no qos rewrite cos command disables CoS rewriting on the switch. The default qos rewrite cos command restores the default setting of enabling CoS rewriting by removing the no qos rewrite cos command from running-config.
Command Mode
Global Configuration
Command Syntax
qos rewrite cos
no qos rewrite cos
default qos rewrite cos
Related Command
qos map traffic-class to cos configures the traffic class to CoS rewrite map.
This command enables CoS rewrite.
switch(config)# qos rewrite cos
switch(config)#qos rewrite dscp
The qos rewrite dscp command enables the rewriting of the DSCP field for outbound tagged packets that were received on CoS trusted ports and untrusted ports. DSCP rewrite is always disabled on DSCP trusted ports. The DSCP value that is written into the packet is based on the data stream’s traffic class. DSCP rewriting is disabled by default.
The no qos rewrite dscp and default qos rewrite dscp commands disable DSCP rewriting on the switch by removing the no qos rewrite dscp command from running-config.
Command Mode
Global Configuration
Command Syntax
qos rewrite dscp
no qos rewrite dscp
default qos rewrite dscp
Related Command
qos map traffic-class to dscp configures the traffic class to DSCP rewrite map.
switch(config)# qos rewrite dscp
switch(config)#qos trust
The qos trust command configures the quality of service port trust mode for the configuration mode interface. Trust-enabled ports classify traffic by examining the traffic’s CoS or DSCP value. Port trust mode default setting is cos for switched interfaces and dscp for routed interfaces.
The default qos trust command restores the default trust mode on the configuration mode interface by removing the corresponding qos trust or no qos trust statement from running-config.
- no qos trust places the port in untrusted mode.
- no qos trust cos removes the corresponding qos trust cos statement.
- no qos trust dscp removes the corresponding qos trust dscp statement.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
qos trust [MODE]
no qos trust [MODE]
default qos trust
- MODETrust mode assigned to the port. Options include:
- cos Enables cos trust mode.
- dscp Enables dscp trust mode.
- no qos trust Enables untrusted mode on the port.
- This command configures trust mode of dscp for interface ethernet
7.
switch(config)# interface ethernet 7 switch(config-if-Et7)# qos trust dscp switch(config-if-Et7)# show active interface Ethernet7 qos trust dscp switch(config-if-Et7)# - This command configures trust mode of untrusted for Port Channel
interface
23.
switch(config)# interface port-channel 23 switch(config-if-Po23)# no qos trust switch(config-if-Po23)# show active interface Port-Channel23 no qos trust switch(config-if-Po23)#
random-detect ecn (Arad/Jericho)
- 00 Non ECN Capable transport.
- 10 ECN Capable transport.
- 01 ECN Capable transport.
- 11 Congestion encountered.
- Average queue size below minimum threshold: Packets are queued normally.
- Average queue size above maximum threshold: Packets are marked congestion encountered.
- Average queue size between minimum and maximum thresholds. Packets are queued or marked congestion encountered. The proportion of marked packets varies linearly with average queue size:
- 0% are marked when average queue size is less than or equal to minimum threshold.
- 100% are marked when average queue size is greater than or equal to maximum threshold.
When transmitted packets are marked Non ECN Capable, congestion packets are dropped, not marked.
The no random-detect ecn and default qos random-detect ecn commands disables ECN marking for the shared buffer by removing the qos random-detect ecn command from running-config.
Command Mode
Tx-Queue configuration
Command Syntax
random-detect ecn minimum-threshold MIN maximum-threshold MAX
no random-detect ecn
default random-detect ecn
Parameters
- MINMinimum threshold. Options include:
- 1 to 256 mbytes Megabyte units.
- 1 to 256000 kbytes Kilobyte units.
- 1 to 256000000 bytes Byte units.
- MAXMaximum threshold. Options include:
- 1 to 256 mbytes Megabyte units.
- 1 to 256000 kbytes Kilobyte units.
- 1 to 256000000 bytes Byte units.
Related Command
tx-queue (Arad/Jericho) places the switch in tx-queue configuration mode.
switch(config)# interface ethernet 3/5/1
switch(config-if-Et3/5/1)# tx-queue 4
switch(config-if-Et3/5/1-txq-4)# random-detect ecn minimum-threshold 128 kbytes
maximum-threshold 1280 kbyte
switch(config-if-Et3/5/1-txq-4)# show active
interface Ethernet3/5/1
tx-queue 4
random-detect ecn minimum-threshold 128 kbytes maximum-threshold 1280 kbytes
switch(config-if-Et3/5/1-txq-4)#random-detect ecn (Helix)
- 00 Non ECN Capable transport.
- 10 ECN Capable transport.
- 01 ECN Capable transport.
- 11 Congestion encountered.
- Average queue size below minimum threshold: Packets are queued normally.
- Average queue size above maximum threshold: Packets are marked congestion encountered.
- Average queue size between minimum and maximum thresholds. Packets are queued or marked congestion encountered. The proportion of marked packets varies linearly with average queue size:
- 0% are marked when average queue size is less than or equal to minimum threshold.
- 100% are marked when average queue size is greater than or equal to maximum threshold.
When transmitted packets are marked Non ECN Capable, congestion packets are dropped, not marked.
Average queue length is tracked for transmit queues and the global pool independently. When either entity reaches its maximum threshold, all subsequent packets are marked.
The no random-detect ecn and default random-detect ecn commands disable ECN marking on the configuration mode queue, deleting the corresponding random-detect ecn command from running-config.
Command Mode
Tx-Queue configuration
Command Syntax
random-detect ecn minimum-threshold MIN maximum-threshold MAX
no random-detect ecn
default random-detect ecn
Parameters
- MINMinimum threshold. Options include:
- 1 to 46080 segments 208-byte segments units.
- 1 to 9 mbytes Megabyte units.
- 1 to 9584 kbytes Kilobyte units.
- 1 to 9584640 bytes Byte units.
- MAX Maximum threshold. Options include:
- 1 to 46080 segments 208-byte segments units.
- 1 to 9 mbytes Megabyte units.
- 1 to 9584 kbytes Kilobyte units.
- 1 to 9584640 bytes Byte units.
- tx-queue (Helix) places the switch in tx-queue configuration mode.
- qos random-detect ecn global-buffer (Helix) enables ECN marking for globally shared packet memory.
- These commands enable ECN marking of unicast packets from transmit
queue 4 of interface
ethernet 15, setting thresholds at
10 and
100
segments.
switch(config)# interface ethernet 15 switch(config-if-Et15)# uc-tx-queue 4 switch(config-if-Et15-txq-4)# random-detect ecn minimum-threshold 10 segments maximum-threshold 100 segments switch(config-if-Et15-txq-4)# show active interface Ethernet15 tx-queue 4 random-detect ecn minimum-threshold 10 segments maximum-threshold 100 segments switch(config-if-Et15-txq-4)# exit switch(config-if-Et15) - This command disables ECN marking of unicast packets from transmit
queue 4 of interface
ethernet
15.
switch(config-if-Et15-txq-4)# no random-detect ecn switch(config-if-Et15-txq-4)# show active interface Ethernet15 switch(config-if-Et15-txq-4)# exit switch(config-if-Et15)#
random-detect ecn (Trident and Tomahawk)
- 00 Non ECN Capable transport.
- 10 ECN Capable transport.
- 01 ECN Capable transport.
- 11 Congestion encountered.
- Average queue size below minimum threshold: Packets are queued normally.
- Average queue size above maximum threshold: Packets are marked congestion encountered.
- Average queue size between minimum and maximum thresholds. Packets are queued or marked congestion encountered. The proportion of marked packets varies linearly with average queue size:
- 0% are marked when average queue size is less than or equal to minimum threshold.
- 100% are marked when average queue size is greater than or equal to maximum threshold.
When transmitted packets are marked Non ECN Capable, congestion packets are dropped, not marked.
Average queue length is tracked for transmit queues and the global pool independently. When either entity reaches its maximum threshold, all subsequent packets are marked.
The no random-detect ecn and default random-detect ecn commands disable ECN marking on the configuration mode queue, deleting the corresponding random-detect ecn command from running-config.
Command Mode
Uc-Tx-Queue configuration
Command Syntax
random-detect ecn minimum-threshold MIN maximum-threshold MAX
no random-detect ecn
default random-detect ecn
Parameters
- MINMinimum threshold. Options include:
- 1 to 46080 segments 208-byte segments units.
- 1 to 9 mbytes Megabyte units.
- 1 to 9584 kbytes Kilobyte units.
- 1 to 9584640 bytes Byte units.
- MAX Maximum threshold. Options include:
- 1 to 46080 segments 208-byte segments units.
- 1 to 9 mbytes Megabyte units.
- 1 to 9584 kbytes Kilobyte units.
- 1 to 9584640 bytes Byte units.
- uc-tx-queue places the switch in the uc-tx-queue configuration mode.
- qos random-detect ecn global-buffer (Trident and Tomahawk) enables ECN marking for globally shared packet memory.
- These commands enable ECN marking of unicast packets from unicast
transmit queue 4 of interface ethernet
15, setting thresholds at 10 and
100
segments.
switch(config)# interface ethernet 15 switch(config-if-Et15)# uc-tx-queue 4 switch(config-if-Et15-uc-txq-4)# random-detect ecn minimum-threshold 10 segments maximum-threshold 100 segments switch(config-if-Et15-uc-txq-4)#show active interface Ethernet15 uc-tx-queue 4 random-detect ecn minimum-threshold 10 segments maximum-threshold 100 segments switch(config-if-Et15-uc-txq-4)# exit switch(config-if-Et15)# - This command disables ECN marking of unicast packets from unicast
transmit queue 4 of interface ethernet
15.
switch(config-if-Et15-uc-txq-4)# no random-detect ecn switch(config-if-Et15-uc-txq-4)# show active interface Ethernet15 switch(config-if-Et15-uc-txq-4)# exit switch(config-if-Et15)#
service-policy type qos input
The service-policy type qos input command applies the specified policy map to a QoS profile. The profile is then applied to an interface in interface configuration mode using the service-profile command.
The no service-policy type qos and default service-policy type qos command deletes the policy map from the profile.
The exit command returns the switch to global configuration mode.
Command Mode
QoS Profile Configuration
Command Syntax
service-policy type qos input policy_map_name
no service-policy type qos input policy_map_name
default service-policy type qos input policy_map_name
Parameter
policy_map_name QoS policy map name.
switch(config-qos-profile-TP)# service-policy type qos input PM-1
switch(config-qos-profile-TP)#service-profile
The command applies the QoS profile to the configuration mode interface.
The no service-profile and the default service-profile command removes the QoS profile from the interface.
The exit command returns the switch to global configuration mode.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
service-profile profile_name
no service-profile profile_name
default service-profile profile_name
Parameter
profile_name QoS profile name.
switch(config)# interface ethernet 13
switch(config-if-Et13)# service-profile TPset extcommunity
The set extcommunity command adds a color extended community to be applied to routes affected by the route-map. Multiple set clauses can be applied to a single route-map to configure multiple colors for routes.Negating the command removes the entry from the route-map.
Command Mode
Config-route-map mode
Command Syntax
set extcommunity COLOR-EXPRESSION [additive | delete]
no set extcommunity COLOR-EXPRESSION [additive | delete]
default set extcommunity COLOR-EXPRESSION [additive | delete]
- COLOR-EXPRESSION The color extended community to be applied to routes affected by the route-map.
- additiveAdds the extended communities to those received.
- deleteDeletes any matching extended color communities.
arista(config)# route-map foo
arista(config-route-map foo)# set extcommunity color 1
arista(config-route-map foo)# set extcommunity color 2 color-only exact-match
arista(config-route-map foo)# set extcommunity color 3 color-only endpoint-match null
arista(config-route-map foo)# set extcommunity color 4 color-only endpoint-match anyshape rate (Interface – Arad/Jericho)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode interface, also known as queue shaping. The shape rate for individual transmit queues is configured by theshape rate (Tx-queue – Arad/Jericho) command. By default, outbound transmission rate is not bounded by a shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode interface by deleting the corresponding shape rate command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
shape rate byte_limit [kbps]
no shape rate
default shape rate
Parameters
byte_limit Shape rate applied to interface (Kbps). Value ranges from 162 to 100000000.
switch(config)# interface ethernet 3/5/1
switch(config-if-Et3/5/1)# shape rate 5000000
switch(config-if-Et3/5/1)# show qos interfaces ethernet 3/5/1
Ethernet3/5/1:
Port shaping rate: 5000012 / 5000000 kbps
Tx Bandwidth Shape Rate Priority ECN
Queue (percent) (units)
-----------------------------------------------------
7 - / - - / - ( - ) SP / SP D
6 - / - - / - ( - ) SP / SP D
5 - / - - / - ( - ) SP / SP D
4 - / - - / - ( - ) SP / SP D
3 - / - - / - ( - ) SP / SP D
2 - / - - / - ( - ) SP / SP D
1 - / - - / - ( - ) SP / SP D
0 - / - - / - ( - ) SP / SP D
switch(config-if-Et3/5/1)#shape rate (Interface – FM6000)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode interface, also known as queue shaping. The shape rate for individual transmit queues is configured by the shape rate (Tx-queue – FM6000)command. By default, outbound transmission rate is not bounded by a shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode interface by deleting the corresponding shape rate command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
shape rate byte_limit [kbps]
no shape rate
default shape rate
Parameters
byte_limit Shape rate applied to interface (Kbps). Value ranges from 7000 to 10000000.
Guidelines
Enabling port shaping on an FM6000 interface disables queue shaping internally. Disabling port shaping restores queue shaping as specified in running-config.
switch(config)# interface ethernet 5
switch(config-if-Et5)# shape rate 5000000
switch(config-if-Et5)#shape rate (Interface – Helix)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode interface, also known as queue shaping. The shape rate for individual transmit queues is configured by the shape rate (Interface – Helix)command. By default, outbound transmission rate is not bounded by a shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode interface by deleting the corresponding shape rate command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
shape rate DATA_LIMIT
no shape rate
default shape rate
- DATA_LIMIT Shape rate applied to interface. Value range varies with data unit:
- 8 to 40000000 8 to 40000000 kbytes per second.
- 8 to 40000000kbps 8 to 40000000 kbytes per second.
- 8 to 60000000pps 8 to 60000000 packets per second.
Guidelines
Shaping rates of at least 8 kbps are supported. At shaping rates smaller than 1 Mbps, granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
switch(config)# interface ethernet 17
switch(config-if-Et17)# shape rate 5000000 kbps
switch(config-if-Et17)# show qos interface ethernet 17/3
Ethernet17:
Trust Mode: COS
Default COS: 0
Default DSCP: 0
Port shaping rate: 5000000 / 5000000 kbps
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
switch(config-if-Et17)#shape rate (Interface – Petra)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode interface, also known as queue shaping. The shape rate for individual transmit queues is configured by the shape rate (Tx-queue – Petra) command. By default, outbound transmission rate is not bounded by a shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode interface by deleting the corresponding shape rate command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
shape rate data_limit [kbps]
no shape rate
default shape rate
Parameters
data_limit Shape rate applied to interface (Kbps). Value ranges from 100 to 10000000.
Guidelines
- 1G ports: above 100 kbps.
- 10G ports: above 7900 kbps.
Commands that specify a smaller shape rate disable port shaping on the interface.
switch(config)# interface ethernet 3/3
switch(config-if-Et3/3)# shape rate 5000000
switch(config-if-Et3/3)# show active
interface Ethernet3/3
shape rate 5000000
switch(config-if-Et3/3)#shape rate (Interface – Trident and Tomahawk)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode interface, also known as queue shaping. The shape rate for individual transmit queues is configured by the shape rate (Tx-queue – Trident and Tomahawk) command. By default, outbound transmission rate is not bounded by a shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode interface by deleting the corresponding shape rate command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
shape rate DATA_LIMIT
no shape rate
default shape rate
- DATA_LIMITShape rate applied to interface. Value range varies with data unit:
- 8 to 40000000 8 to 40000000 kbytes per second.
- 8 to 40000000kbps 8 to 40000000 kbytes per second.
- 8 to 60000000pps 8 to 60000000 packets per second.
Guidelines
Shaping rates of at least 8 kbps are supported. At shaping rates smaller than 1 Mbps, granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
switch(config)# interface ethernet 5
switch(config-if-Et5)# shape rate 5000000
switch(config-if-Et5)#shape rate (Interface – Trident II)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode interface, also known as queue shaping. The shape rate for individual transmit queues is configured by the shape rate (Tx-queue – Trident II)command. By default, outbound transmission rate is not bounded by a shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode interface by deleting the corresponding shape rate command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
shape rate DATA_LIMIT
no shape rate
default shape rate
Parameters
-
- 8 to 40000000 kbps 8 to 40000000 kbytes per second.
- 8 to 40000000 kbps 8 to 40000000 kbytes per second.
-
8 to 60000000 pps 8 to 60000000 packets per second.
Guidelines
Shaping rates of at least 8 kbps are supported. At shaping rates smaller than 1 Mbps, granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
switch(config)# interface ethernet 17/3
switch(config-if-Et17/3)# shape rate 5000000 kbps
switch(config-if-Et17/3)# show qos interface ethernet 17/3
Ethernet17/3:
Trust Mode: COS
Default COS: 0
Default DSCP: 0
Port shaping rate: 5000000 / 5000000 kbps
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
switch(config-if-Et17/3)#shape rate (Tx-queue – Arad/Jericho)
The shape rate command specifies the maximum bandwidth for outbound traffic on the transmit queue, also known as queue shaping. The shape rate for interfaces is configured by the shape rate (Interface – Arad/Jericho)command. By default, the configured outbound transmission rate is not bounded by a transmit queue shape rate.
Shaping rates greater than 50000 kbps are supported. At lower shaping rates (less than 10 Mbps), granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode queue by deleting the corresponding shape rate command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
shape rate byte_limit [kbps]
no shape rate
default shape rate
Parameters
byte_limit Shape rate applied to interface (Kbps). Value ranges from 50000 to 100000000.
Related Command
tx-queue (Arad/Jericho) places the switch in tx-queue configuration mode.
Related Information
switch(config)# interface ethernet 3/4/1
switch(config-if-Et3/4/1)# tx-queue 4
switch(config-if-Et3/4/1-txq-4)# shape rate 1000000 kbps
switch(config-if-Et3/4/1-txq-4)# tx-queue 3
switch(config-if-Et3/4/1-txq-3)# shape rate 1000000 kbps
switch(config-if-Et3/4/1-txq-3)# show qos interface ethernet 3/4/1
Ethernet3/4/1:
Port shaping rate: disabled
Tx Bandwidth Shape Rate Priority ECN
Queue (percent) (units)
-----------------------------------------------------
7 - / - - / - ( - ) SP / SP D
6 - / - - / - ( - ) SP / SP D
5 - / - - / - ( - ) SP / SP D
4 - / - 999 / 1000 ( Mbps ) SP / SP D
3 - / - 999 / 1000 ( Mbps ) SP / SP D
2 - / - - / - ( - ) SP / SP D
1 - / - - / - ( - ) SP / SP D
0 - / - - / - ( - ) SP / SP D
switch(config-if-Et3/4/1-txq-3)#shape rate (Tx-queue – FM6000)
The shape ratecommand specifies the maximum bandwidth for outbound traffic on the transmit queue, also known as queue shaping. The shape rate for interfaces is configured by the shape rate (Interface – FM6000) command. By default, the configured outbound transmission rate is not bounded by a transmit queue shape rate.
Queue shaping on an FM6000 port is supported only when port shaping is not enabled on the interface. Enabling port shaping on a port disables queue shaping internally. Disabling port shaping restores queue shaping as specified by running-config.
Shaping rates greater than 460 kbps are supported. At lower shaping rates (less than 10 Mbps), granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the transmit queue by deleting the corresponding shape rate command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
shape rate byte_limit [kbps]
no shape rate
default shape rate
Parameters
byte_limit Shape rate applied to interface (Kbps). Value ranges from 464 to 10000000.
- tx-queue (FM6000) places the switch in tx-queue configuration mode.
- shape rate (Interface – FM6000) configures the shape rate for a configuration mode interface.
switch(config)# interface ethernet 19
switch(config-if-Et19)# tx-queue 4
switch(config-if-Et19-txq-4)# shape rate 1000000
switch(config-if-Et19-txq-4)# tx-queue 3
switch(config-if-Et19-txq-3)# shape rate 1000000
switch(config-if-Et19-txq-3)# show qos interface ethernet 19
Ethernet19:
Trust Mode: COS
Tx-Queue Bandwidth Shape Rate Priority
(percent) (Kbps)
-----------------------------------------------
6 N/A disabled strict
5 N/A disabled strict
4 N/A 1000000 strict
3 25 1000000 round-robin
2 25 disabled round-robin
1 25 disabled round-robin
0 25 disabled round-robin
switch(config-if-Et19-txq-3)#shape rate (Tx-queue – Helix)
The shape rate command specifies the maximum bandwidth for outbound traffic on the transmit queue, also known as queue shaping. The shape rate for interfaces is configured by the shape rate (Interface – Helix) command. By default, the configured outbound transmission rate is not bounded by a transmit queue shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode transmit queue by deleting the corresponding shape rate command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
shape rate byte_limit [kbps]
no shape rate
default shape rate
Parameters
-
- 8 to 40000000 8 to 40,000,000 kbytes per second.
- 8 to 40000000 kbps 8 to 40000000 kbytes per second.
- 8 to 60000000 pps 8 to 60000000 packets per second.
Restrictions
Queue shaping is not supported in cut-through mode.
- tx-queue (Helix) places the switch in tx-queue configuration mode.
- shape rate (Interface – Helix) configures the shape rate for a configuration mode interface.
switch(config)# interface ethernet 17/3
switch(config-if-Et17/3)# tx-queue 4
switch(config-if-Et17/3-txq-4)# shape rate 1000000 kbps
switch(config-if-Et17/3-txq-4)# tx-queue 3
switch(config-if-Et17/3-txq-3)# shape rate 1000000 kbps
switch(config-if-Et17/3-txq-3)# show qos interface ethernet 17/3
Ethernet17/3:
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
5 - / - ( - ) - / - ( - ) SP / SP
4 - / - ( - ) 1 / 1 ( Gbps ) SP / SP
3 - / - ( - ) 1 / 1 ( Gbps ) SP / SP
2 - / - ( - ) - / - ( - ) SP / SP
1 - / - ( - ) - / - ( - ) SP / SP
0 - / - ( - ) - / - ( - ) SP / SP
switch(config-if-Et17/3-txq-3)#shape rate (Tx-queue – Petra)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode transmit queue, also known as queue shaping. The shape rate for interfaces is configured by the shape rate (Interface – Petra) command. By default, the configured outbound transmission rate is not bounded by a transmit queue shape rate.
Queue shaping applies only to unicast traffic. Shaping rates of at least 162 Kbps are supported.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode queue by deleting the corresponding shape rate command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
shape rate DATA_LIMIT
no shape rate
default shape rate
Parameters
-
- 8 to 40000000 kbps Range is from 8 to 40000000 kbytes per second.
- 8to 60000000pps Range is from 8 to 60000000 packets per second.
Shaping rates greater than 460 kbps are supported. At lower shaping rates (less than 10 Mbps), granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
- tx-queue (Petra) places the switch in tx-queue configuration mode.
- shape rate (Interface – Petra) configures the shape rate for a configuration mode interface.
switch(config)# interface ethernet 3/28
switch(config-if-Et3/28)# tx-queue 4
switch(config-if-Et3/28-txq-4)# shape rate 1000000
switch(config-if-Et3/28-txq-4)# tx-queue 3
switch(config-if-Et3/28-txq-3)# shape rate 1000000
switch(config-if-Et3/28-txq-3)# show qos interface ethernet 3/28
Ethernet3/28:
Tx-Queue Bandwidth Shape Rate Priority
(percent) (Kbps)
-----------------------------------------------
7 N/A disabled strict
6 N/A disabled strict
5 N/A disabled strict
4 N/A 1000000 strict
3 25 1000000 round-robin
2 25 disabled round-robin
1 25 disabled round-robin
0 25 disabled round-robin
switch(config-if-Et3/28-txq-3)#shape rate (Tx-queue – Trident and Tomahawk)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode transmit queue, also known as queue shaping. The shape rate for interfaces is configured by the shape rate (Interface – Trident and Tomahawk) command. By default, the configured outbound transmission rate is not bounded by a transmit queue shape rate.
The no shape rate and default shape rate commands remove the shape rate limit from the configuration mode transmit queue by deleting the corresponding shape rate command from running-config.
Command Mode
Mc-Tx-Queue configuration
Uc-Tx-Queue configuration
Command Syntax
shape rate DATA_LIMIT
no shape rate
default shape rate
- DATA_LIMIT Shape rate applied to the queue. Value
range varies with data unit:
- 8 to 40000000 kbps Range is from 8 to 40000000 kbytes per second.
-
8 to 60000000 pps Range is from 8 to 60000000 packets per second.
- mc-tx-queue places the switch in mc-tx-queue configuration mode.
- uc-tx-queue places the switch in uc-tx-queue configuration mode.
- shape rate (Interface – Trident and Tomahawk) configures the shape rate for a configuration mode interface.
Guidelines
Shaping rates of at least 8 kbps are supported. At shaping rates smaller than 1 Mbps, granularity and rounding errors may skew the actual shaping rate by 20% from the specified rate.
When two queues source traffic from the same traffic class and the higher priority queue is shaped, that queue consumes all internal buffers, starving the lower priority queue even if bandwidth is available.
switch(config)# interface ethernet 7
switch(config-if-Et7)# uc-tx-queue 3
switch(config-if-Et7-uc-txq-3)# shape rate 1000000
switch(config-if-Et7-uc-txq-3)# mc-tx-queue 2
switch(config-if-Et7-mc-txq-2)# shape rate 1000000
switch(config-if-Et7-mc-txq-2)# show qos interface ethernet 7
Ethernet7:
Tx-Queue Bandwidth Shape Rate Priority Priority Group
(percent) (Kbps)
----------------------------------------------------------------
UC7 N/A disabled strict 1
UC6 N/A disabled strict 1
MC3 N/A disabled strict 1
UC5 N/A disabled strict 0
UC4 N/A disabled strict 0
MC2 N/A 1000000 strict 0
UC3 20 1000000 round-robin 0
UC2 16 disabled round-robin 0
MC1 16 disabled round-robin 0
UC1 16 disabled round-robin 0
UC0 16 disabled round-robin 0
MC0 16 disabled round-robin 0
switch(config-if-Et7-mc-txq-2)#shape rate (Tx-queue – Trident II)
The shape rate command specifies the maximum bandwidth for outbound traffic on the configuration mode transmit queue, also known as queue shaping. The shape rate for interfaces is configured by the shape rate (Interface – Trident II)command. By default, the configured outbound transmission rate is not bounded by a transmit queue shape rate.
The no shape rate and default shape rate commands remove the shape rate bandwidth limit on the configuration mode transmit queue by deleting the corresponding shape rate command from running-config.
Command Mode
Tx-Queue Configuration
Command Syntax
shape rate byte_limit [kbps]
no shape rate
default shape rate
Parameters
-
- 8 to 40000000 kbps Range is from 8 to 40000000 kbytes per second.
- 8 to 60000000 pps Range is from 8 to 60000000 packets per second.
Restrictions
Queue shaping is not supported in cut-through mode
- tx-queue (Trident II) places the switch in tx-queue configuration mode.
- shape rate (Interface – Trident II) configures the shape rate for a configuration mode interface.
switch(config)# interface ethernet 17/3
switch(config-if-Et17/3)# tx-queue 4
switch(config-if-Et17/3-txq-4)# shape rate 1000000 kbps
switch(config-if-Et17/3-txq-4)# tx-queue 3
switch(config-if-Et17/3-txq-3)# shape rate 1000000 kbps
switch(config-if-Et17/3-txq-3)# show qos interface ethernet 17/3
Ethernet17/3:
Tx Bandwidth Shape Rate Priority
Queue Guaranteed (units) (units)
------------------------------------------------------------
7 - / - ( - ) - / - ( - ) SP / SP
6 - / - ( - ) - / - ( - ) SP / SP
5 - / - ( - ) - / - ( - ) SP / SP
4 - / - ( - ) 1 / 1 ( Gbps ) SP / SP
3 - / - ( - ) 1 / 1 ( Gbps ) SP / SP
2 - / - ( - ) - / - ( - ) SP / SP
1 - / - ( - ) - / - ( - ) SP / SP
0 - / - ( - ) - / - ( - ) SP / SP
switch(config-if-Et17/3-txq-3)#show interface counters queue drop-precedence
The show interface counters queue drop-precedence command displays the drop-precedence counters.
Command Mode
EXEC
Command Syntax
show interface counters queue drop-precedence
switch# show interface counters queue drop-precedence
intf 0 1 2
Et1/1 100 0 200
Et1/2 200 0 300
switch#show platform petraA traffic-class
The show platform petraA traffic-class command displays the traffic class assignment on all specified Petra chips. Each chip controls eight Ethernet interfaces. The default traffic class of an interface is specified by the traffic class assigned to the chip that controls the interface.
Traffic class assignments are configured with the platform petraA traffic-class command.
- show platform petraA traffic-class Traffic class of all chips on all linecard.
- show platform petraA CHIP_NAME traffic-class Traffic class of specified chip.
- show platform petraA MODULE_NAME traffic-class Traffic class of all chips on specified linecard.
Command Mode
EXEC
Command Syntax
show platform petraA traffic-class
show platform petraA CHIP_NAME traffic-class
show platform petraA MODULE_NAME traffic-class
- CHIP_NAMEName of Petra chip on linecard that control Ethernet ports. Options include:
- petra cardX / chipY All ports on PetraA chip chipY on linecard cardX (7500 Series).
- petra chipZ All ports on PetraA chip chipZ (7048 Series).
7500 Series
Switches can contain up to eight linecards. cardX varies from 3 to 10.
Each linecard contains six PetraA chips. Each chip controls eight ports. chipY varies from 0 to 5:- 0 controls ports 1 through 8
- 1 controls ports 9 through 16
- 2 controls ports 17 through 24
- 3 controls ports 25 through 32
- 4 controls ports 33 through 40
- 5 controls ports 41 through 48
7048 Series
Each switch contains two PetraA chips. chipZ varies from 0 to 1:- 0 controls ports 1 through 32
- 1 controls ports 33 through 52
- MODULE_NAME Name and number of linecard (7500 Series). Options include:
- module linecard mod_num Linecard number (3 to 10).
- module mod_num Linecard number (3 to 10).
Related Command
platform petraA traffic-class configures the default traffic class used by all ports on a specified chip.
switch# show platform petraA module linecard 3 traffic-class
Petra3/0 traffic-class: 1
Petra3/1 traffic-class: 1
Petra3/2 traffic-class: 1
Petra3/3 traffic-class: 1
Petra3/4 traffic-class: 5
Petra3/5 traffic-class: 1
switch#show platform trident tcam qos detail
The show platform trident tcam qos detail command displays the list of all the SVIs that are sharing the TCAM entries.
Command Mode
EXEC
Command Syntax
show platform trident tcam qos detail
switch(config)# show platform trident tcam qos detail
=== Policy-map p01 type qos on switch Linecard0/0 ===
Interfaces : Vlan2 Vlan1
=-= Interface BitMap =-=
0x000000000000000001FFFFFEshow platform trident tcam shared vlan interface-class-id
The show platform trident tcam shared vlan interface-class-id command displays what SVIs are currently sharing the QoS policy-map in the below output under QoS PMAP Data.
Command Mode
EXEC
Command Syntax
show platform trident tcam shared vlan interface-class-id
switch(config)# show platform trident tcam shared vlan interface-class-id
=== Shared RACL Data on switch Linecard0/0 ===
=== Shared QoS Policy-map Data on switch Linecard0/0 ===
Interface Class Id VLANs
1 1 2show platform xp qos tcam hit
The show platform xp qos tcam hit command displays the TCAM entries programmed for each policy-map as well as the traffic hits. The hits option is used to see the TCAM entries with nonzero traffic hits.
Command Mode
EXEC
Command Syntax
show platform xp qos tcam hit
switch# show platform xp qos tcam hit
=== Policy-map test type qos on switch 0 ===
Assigned to ports: Ethernet10/1
=-= Class-map test type qos =-=
=== ACL test
=========================================================================================
|Seq|AclId|Prot|Port|SPort|Ecn|FFlg|DPort|Vlan|Action|Hits|Src Ip|Dest Ip|hwId | | | | | | | |dscp|cos |tc|PolId| | | |
=========================================================================================
| 10| 0x01| | | | |0x04| | | 4 |- | - | - |91852787| | | | 0 | 0x00 | | | | |0xfb| | | | | |
-----------------------------------------------------------------------------------------show policy-map interface
The show policy-map interface command displays contents of the policy map applied to specified the interface.
Command Mode
EXEC
Command Syntax
show policy-map interface interface_name
Parameters
- no parameter Returns data for all interfaces.
- ethernet e_range Ethernet interfaces specified by e_range.
- port-channel p_range Port channel interfaces specified by p_range.
switch# show policy-map interface ethernet 1
Service-policy input: p1
Hardware programming status: Successful
Class-map: c2001 (match-any)
Match: vlan 2001 0xfff
set dscp 4
Class-map: c2002 (match-any)
Match: vlan 2002 0xfff
set dscp 8
Class-map: c2003 (match-any)
Match: vlan 2003 0xfff
set dscp 12show policy-map
The show policy-map command displays the policy map information for the configured policy map.
Command Mode
EXEC
Command Syntax
show policy-map policy_map_name [counters][interface | summary]
- policy_map_name QoS policy map name.
- counters Specifies the policy map traffic match count (This parameter is applicable only on DCS-7010, DCS-7050X, DCS7250X, DCS-7300X and DCS-7280(E/R), DCS-7500(E/R) series switches.)
- interface Specifies the service policy on an interface.
- summary Policy map summary.
- The show policy-map command displays the information
for the policy map
policy1.
switch# show policy-map policy1 Service-policy policy1 Class-map: class1 (match-any) Match: ip access-group name acl1 Police cir 512000 bps bc 96000 bytes Class-map: class-default (match-any) - The show policy-map counters command displays the
policy map traffic match count for the policy map
configured.
switch# show policy-map policy1 counters Service-policy input: policy1 Hardware programming status: Successful Class-map: class1 (match-any) Match: vlan 20-40,1000-1250 police rate 100 mbps burst-size 100 kbytes Interface: Ethernet16/1 Conformed 28621 packets, 7098008 bytes -------------- packet match count Class-map: class-default (match-any) Matched Packets: 19 -------------- packet match count
show qos interfaces random-detect ecn
The show qos interfaces random-detect ecn command displays the Explicit Congestion Notification (ECN) configuration for each transmit queue on the specified interfaces.
Command Mode
EXEC
Command Syntax
show qos interfaces [INTERFACE_NAME] random-detect ecn
Parameters
- no parameter Returns data for all interfaces.
- ethernet e_range Ethernet interfaces specified by e_range.
- port-channel p_range Port-Channel Interfaces specified by p_range.
switch(config)# interface ethernet 3/5/1
switch(config-if-Et3/5/1)# tx-queue 0
switch(config-if-Et3/5/1-txq-0)# random-detect ecn minimum-threshold 2560 kbytes
maximum-threshold 256000 kbytes
switch(config-if-Et3/5/1-txq-0)# tx-queue 1
switch(config-if-Et3/5/1-txq-1)# random-detect ecn minimum-threshold 25600 kbytes
maximum-threshold 128000 kbytes
switch(config-if-Et3/5/1-txq-1)# tx-queue 2
switch(config-if-Et3/5/1-txq-2)# random-detect ecn minimum-threshold 25600 bytes
maximum-threshold 128000 bytes
switch(config-if-Et3/5/1-txq-2)# tx-queue 3
switch(config-if-Et3/5/1-txq-3)# random-detect ecn minimum-threshold 25 mbytes
maximum-threshold 128 mbytes
switch(config-if-Et3/5/1-txq-3)# show qos interfaces ethernet 3/5/1 random-detect
ecn
Ethernet3/5/1:
Tx-Queue Mininimum Threshold Maximum Threshold Threshold Unit
---------------------------------------------------------------------
7 - - -
6 - - -
5 - - -
4 - - -
3 25 128 mbytes
2 25600 128000 bytes
1 25600 128000 kbytes
0 2560 256000 kbytes
switch(config-if-Et3/5/1-txq-3)#show qos interfaces trust
The show qos interfaces trust command displays the configured and operational QoS trust mode of all specified interfaces.
Command Mode
EXEC
Command Syntax
show qos interfaces [INTERFACE_NAME] trust
Parameters
- no parameter Returns data for all interfaces.
- ethernet e_range Ethernet interfaces specified by e_range.
- port-channel p_range Port-Channel Interfaces specified by p_range.
switch(config)# interface ethernet 1/1
switch(config-if-Et1/1)# qos trust cos
switch(config-if-Et1/1)# interface ethernet 1/2
switch(config-if-Et1/2)# qos trust dscp
switch(config-if-Et1/2)# interface ethernet 1/3
switch(config-if-Et1/3)# no qos trust
switch(config-if-Et1/3)# interface ethernet 1/4
switch(config-if-Et1/4)# default qos trust
switch(config-if-Et1/4)# interface ethernet 2/1
switch(config-if-Et2/1)# no switchport
switch(config-if-Et2/1)# default qos trust
switch(config-if-Et2/1)# show qos interface ethernet 1/1 - 2/4 trust
Port Trust Mode
Operational Configured
---------------------------------------------------------------
Ethernet1/1 COS COS
Ethernet1/2 DSCP DSCP
Ethernet1/3 UNTRUSTED UNTRUSTED
Ethernet1/4 COS DEFAULT
Ethernet2/1 DSCP DEFAULT
Ethernet2/2 COS DEFAULT
Ethernet2/3 COS DEFAULT
Ethernet2/4 COS DEFAULT
switch(config-if-Et2/1)#show qos interfaces
The show qos interfaces command displays the QoS, DSCP, and transmit queue configuration on a specified interface. Information provided by this command includes the ports trust setting, the default CoS value, and the DSCP value.
Command Mode
EXEC
Command Syntax
show qos interfaces INTERFACE_NAME
Parameters
- no parameter Returns data for all interfaces.
- ethernet e_num Ethernet interface specified by e_num.
- port-channel p_num Port-Channel Interface specified by p_num.
switch> show qos interfaces ethernet 4
Ethernet4:
Trust Mode: COS
Default COS: 0
Default DSCP: 0
Port shaping rate: 5000000Kbps
Tx-Queue Bandwidth ShapeRate Priority
(percent) (Kbps)
-----------------------------------------------
0 50 disabled round-robin
1 50 disabled round-robin
2 N/A disabled strict
3 N/A 1000000 strict
4 N/A 1000000 strict
5 N/A 1500000 strict
6 N/A 2000000 strict
switch>show qos interfaces latency maximum
The show qos interfaces latency maximum command displays the maximum latency tail-drop threshold active on each Tx queue for a specified interface.
Command Mode
EXEC
Command Syntax
show qos interfaces INTERFACE_NAME latency maximum
Parameters
INTERFACE_NAME: Name of the interface.
switch# show qos interfaces ethernet 23/1 latency maximum
Ethernet23/1:
Tx Queue Maximum Latency
-------- ---------------
7 -
6 -
5 -
4 -
3 10 ms
2 -
1 -
0 -
switch# show qos profile
qos profile latency
tx-queue 3
latency maximum 4000 microseconds
Tx-queue 4
latency maximum 30 milliseconds
switch#show qos maps
The show qos maps command lists the number of traffic classes that the switch supports and displays the CoS-Traffic Class, DSCP-Traffic Class, Traffic Class-CoS, and Traffic Class-Transmit Queue maps.
Command Mode
EXEC
Command Syntax
show qos maps
switch> show qos maps
Number of Traffic Classes supported: 8
Number of Transmit Queues supported: 8
Cos Rewrite: Disabled
Dscp Rewrite: Disabled
Cos-tc map:
cos: 0 1 2 3 4 5 6 7
----------------------------
tc: 1 0 2 3 4 5 6 7
Dscp-tc map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 0 0 0 0 2 2 2 2
2 : 2 2 2 2 3 3 3 3 3 3
3 : 3 3 4 4 4 4 4 4 4 4
4 : 5 5 5 5 5 5 5 5 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
Tc-cos map:
tc: 0 1 2 3 4 5 6 7
----------------------------
cos: 1 0 2 3 4 5 6 7
Tc-dscp map:
tc: 0 1 2 3 4 5 6 7
-----------------------------
dscp: 8 0 16 24 32 40 48 56
Tc - tx-queue map:
tc: 0 1 2 3 4 5 6 7
---------------------------------
tx-queue: 0 1 2 3 4 5 6 7
switch>show qos map dscp to traffic-class
Command Mode
Privileged EXEC mode
Command Syntax
show qos map dscp to traffic-class [ map_name ]
Parameters
- map_name The name of the DSCP to traffic-class map. If this is not specified, all DSCP to TC maps are shown.
Example
switch#show qos map dscp to traffic-class map1
DSCP to TC map: map1
d1 : d2 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 : 1 1 1 1 1 1 1 1 0 0
1 : 0 0 0 0 0 0 2 2 2 2
2 : 6 6 6 6 6 6 3 3 3 3
3 : 3 3 4 4 4 7 4 4 4 4
4 : 5 5 5 5 5 5 5 5 6 6
5 : 6 6 6 6 6 6 7 7 7 7
6 : 7 7 7 7
switch#show qos profile summary
The show qos profile summary command displays the QoS profile summary of those which are part of the running configuration.
Command Mode
EXEC
Command Syntax
show qos profile summary
switch(config)# show qos profile summary
Qos Profile: p
Configured on: Et13,7
Fabric
Po12
Qos Profile: p2
Configured on: Et56show qos profile
The show qos profile command displays the contents of the specified QoS profile or of all QoS profiles in the running configuration.
Command Mode
EXEC
Command Syntax
show qos profile profile_name
Parameter
profile_name QoS profile name.
- This command displays the contents of all QoS profiles configured on the
switch.
switch(config)# show qos profile qos profile p qos cos 1 no priority-flow-control pause watchdog priority-flow-control priority 1 no-drop priority-flow-control priority 2 no-drop qos profile p2 qos cos 3 priority-flow-control priority 0 no-drop - This command displays the configuration attached and information specific to
QoS profile
p2.
switch# show qos profile p2 qos profile p2 qos cos 3 priority-flow-control priority 0 no-drop
show qos random-detect ecn
The command displays the global Explicit Congestion Notification (ECN) configuration.
Command Mode
EXEC
Command Syntax
show qos random-detect ecn
switch(config)# qos random-detect ecn global-buffer minimum-threshold 2 mbytes
maximum-threshold 5 mbytes
switch(config)# show qos random-detect ecn
Minimum Threshold: 2
Maximum Threshold: 5
Threshold Unit: mbytes
switch(config)#show run|grep sharing
Theshow run|grep sharing command displays whether the QoS policy-map sharing on SVIs is enabled or disabled.
Command Mode
EXEC
Command Syntax
show run|grep sharing
switch# show run|grep sharing
hardware access-list qos resource sharing vlan in ---- If this message is displayed then QoS policy-map sharing on SVIs is enabled.
tx-queue (Arad/Jericho)
The tx-queue command places the switch in Tx-queue configuration mode to configure a transmit queue on the configuration mode interface. Tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
Arad and Jericho platform switches have eight queues, 0 through 7, and all queues are exposed through the CLI. However, queue 7 is not user-configurable. Queue 7 is always mapped to traffic class 7, which is reserved for control traffic.
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no tx-queue and default tx-queue commands remove the configuration for the specified transmit queue by deleting all corresponding tx-queue mode statements from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
tx-queue queue_level
Parameters
queue_level The transmit queue. Values range from 0 to 7.
Guidelines
Arad and Jericho platform switch queues handle unicast traffic. Queues for multicast traffic are not supported.
switch(config)# interface ethernet 3/3/3
switch(config-if-Et3/3/3)# tx-queue 4
switch(config-if-Et3/3/3-txq-4)#tx-queue (FM6000)
The tx-queue command places the switch in Tx-queue configuration mode to configure a transmit queue on the configuration mode interface. Tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
FM6000 platform switches have eight queues, 0 through 7. All queues are exposed through the CLI and are user configurable.
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no tx-queue and default tx-queue commands remove the configuration for the specified transmit queue by deleting the all corresponding tx-queue mode commands from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
tx-queue queue_level
Parameters
queue_level The transmit queue. Values range from 0 to 7.
Guidelines
FM6000 platform switch queues handle unicast and multicast traffic.
switch(config)# interface ethernet 5
switch(config-if-Et5)# tx-queue 3
switch(config-if-Et5-txq-3)#tx-queue (Helix)
The tx-queue command places the switch in tx-queue configuration mode to configure a transmit queue on the configuration mode interface. The tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
Helix platform switches have eight unicast (UC0 – UC7) and eight multicast (MC0 – MC7) queues. Each UCx-MCx queue set is combined into a single queue group (L1.x), which is exposed to the CLI through this command.
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no tx-queue and default tx-queue commands remove the configuration for the specified transmit queue by deleting the all corresponding tx-queue mode commands from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
tx-queue queue_level
Parameters
queue_level Transmit queue group number. Values range from 0 to 7.
Guidelines
Helix platform switch queues handle unicast and multicast traffic.
switch(config)# interface ethernet 17/3
switch(config-if-Et17/3)# tx-queue 4
switch(config-if-Et17/3-txq-4)#tx-queue (Petra)
The tx-queue command places the switch in tx-queue configuration mode to configure a transmit queue on the configuration mode interface. The tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
Petra platform switches have eight queues, 0 through 7, and all queues are exposed through the CLI. However, queue 7 is not user-configurable. Queue 7 is always mapped to traffic class 7, which is reserved for control traffic.
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no tx-queue and default tx-queue commands remove the configuration for the specified transmit queue by deleting the all corresponding tx-queue mode commands from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
tx-queue queue_level
Parameters
queue_level The transmit queue. Values range from 0 to 7.
Guidelines
Petra platform switch queues handle unicast traffic. Queues for multicast traffic are not supported.
switch(config)# interface ethernet 3/3
switch(config-if-Et3/3)# tx-queue 3
switch(config-if-Et3/3-txq-3)#tx-queue (Trident II)
The tx-queue command places the switch in tx-queue configuration mode to configure a transmit queue on the configuration mode interface. The tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
Trident II platform switches have eight unicast (UC0 – UC7) and eight multicast (MC0 – MC7) queues. Each UCx-MCx queue set is combined into a single queue group (L1.x), which is exposed to the CLI through this command.
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no tx-queue and default tx-queue commands remove the configuration for the specified transmit queue by deleting the all corresponding tx-queue mode commands from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
tx-queue queue_level
Parameters
queue_level Transmit queue group number. Values range from 0 to 7.
Trident II platform switch queues handle unicast and multicast traffic.
switch(config)# interface ethernet 17/3
switch(config-if-Et17/3)# tx-queue 4
switch(config-if-Et17/3-txq-4)#uc-tx-queue
The uc-tx-queue command places the switch in the uc-tx-queue configuration mode to configure a unicast transmit queue on the configuration mode interface. The uc-tx-queue configuration mode is not a group change mode; running-config is changed immediately after commands are executed. The exit command does not affect the configuration.
Trident and Tomahawk switches have eight unicast queues (UC0 – UC7) and four multicast queues (MC0 – MC03), categorized into two priority groups. All queues are exposed through the CLI and are user-configurable.
- Priority Group 1: UC7, UC6, MC3
- Priority Group 0: UC5, UC4, MC2, UC3, UC2, MC1, UC1, UC0, MC0
The exit command returns the switch to the configuration mode for the base Ethernet or port channel interface.
The no uc-tx-queue and default uc-tx-queue commands remove the configuration for the specified transmit queue by deleting the all corresponding uc-tx-queue mode commands from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
uc-tx-queue queue_level
Parameters
queue_level The multicast transmit queue number. Values range from 0 to 7.
Related Command
mc-tx-queue: Configures multicast transmit queues on Trident and Tomahawk platform switches.
switch(config)# interface ethernet 5
switch(config-if-Et5)# uc-tx-queue 4
switch(config-if-Et5-mc-txq-4)#Chipset Mapping for QoS
| Model Number | Chipset Name |
|---|---|
| 7010T-48 | Helix4 |
| 7010T-48-DC | Helix4 |
| 7020SR-24C2 | QumranAX |
| 7020SR-32C2 | QumranAX |
| 7020SRG-24C2 | QumranAX |
| 7020TR-48 | QumranAX |
| 7020TRA-48 | QumranAX |
| 7048T-4S | Petra |
| 7048T-A | Petra |
| 7050CX3-32S | Trident3X7 |
| 7050CX3M-32S | Trident3X7 |
| 7050Q-16 | Trident+ |
| 7050QX2-32S | Trident2+ |
| 7050QX-32 | Trident2 |
| 7050QX-32S | Trident2 |
| 7050S-52 | Trident+ |
| 7050S-64 | Trident+ |
| 7050SX-128 | Trident2 |
| 7050SX2-128 | Trident2+ |
| 7050SX2-72Q | Trident2+ |
| 7050SX3-48C8 | Trident3X5 |
| 7050SX3-48YC | Trident3X5 |
| 7050SX3-48YC12 | Trident3X7 |
| 7050SX3-96YC8 | Trident3X7 |
| 7050SX-64 | Trident2 |
| 7050SX-72 | Trident2 |
| 7050SX-72Q | Trident2 |
| 7050SX-96 | Trident2 |
| 7050T-36 | Trident+ |
| 7050T-36 (HwRev4) | Trident+ |
| 7050T-52 | Trident+ |
| 7050T-52 (HwRev4) | Trident+ |
| 7050T-64 | Trident+ |
| 7050T-64 (HwRev4) | Trident+ |
| 7050TX-128 | Trident2 |
| 7050TX2-128 | Trident2+ |
| 7050TX3-48C8 | Trident3X5 |
| 7050TX-48 | Trident2 |
| 7050TX-64 | Trident2 |
| 7050TX-72 | Trident2 |
| 7050TX-72Q | Trident2 |
| 7050TX-96 | Trident2 |
| 7060CX2-32S | Tomahawk+ |
| 7060CX-32S | Tomahawk |
| 7060DX4-32 | Tomahawk3 |
| 7060PX4-32 | Tomahawk3 |
| 7060SX2-48YC6 | Tomahawk+ |
| 7120T-4S | Bali |
| 7124FX | Bali |
| 7124S | Bali |
| 7124SX | Bali |
| 7140T-8S | Bali |
| 7148S | Bali |
| 7148SX | Bali |
| 7150S-24 | Alta |
| 7150S-24-CL | Alta |
| 7150S-52-CL | Alta |
| 7150S-64-CL | Alta |
| 7150SC-24-CLD | Alta |
| 7150SC-64-CLD | Alta |
| 7170-32C | Tofino |
| 7170-32CD | Tofino |
| 7170-64C | Tofino |
| 720XP-24Y6 | Trident3X3 |
| 720XP-24ZY4 | Trident3X3 |
| 720XP-48Y6 | Trident3X3 |
| 720XP-48ZC2 | Trident3X3 |
| 720XP-96ZC2 | Trident3X3 |
| 7250QX-64 | Trident2 |
| 7260CX3-64 | Tomahawk2 |
| 7260CX3-64E | Tomahawk2 |
| 7260CX-64 | Tomahawk |
| 7260QX-64 | Tomahawk |
| 7280CR2-60 | Jericho+ |
| 7280CR2A-60 | Jericho+ |
| 7280CR2AK-30 | Jericho+ |
| 7280CR2K-30 | Jericho+ |
| 7280CR2K-60 | Jericho+ |
| 7280CR2M-30 | Jericho+ |
| 7280CR3-32D4 | Jericho2 |
| 7280CR3-32P4 | Jericho2 |
| 7280CR3-96 | Jericho2 |
| 7280CR3K-32D4 | Jericho2 |
| 7280CR3K-32P4 | Jericho2 |
| 7280CR3K-96 | Jericho2 |
| 7280CR3MK-32D4 | Jericho2 |
| 7280CR3MK-32P4 | Jericho2 |
| 7280CR-48 | Jericho |
| 7280DR3-24 | Jericho2 |
| 7280DR3K-24 | Jericho2 |
| 7280PR3-24 | Jericho2 |
| 7280PR3K-24 | Jericho2 |
| 7280QRA-C36S | Jericho |
| 7280QR-C36 | QumranMX |
| 7280QR-C72 | Jericho |
| 7280SE-64 | Arad+ |
| 7280SE-68 | Arad+ |
| 7280SE-72 | Arad+ |
| 7280SR2-48YC6 | Jericho+ |
| 7280SR2A-48YC6 | Jericho+ |
| 7280SR2K-48C6 | Jericho+ |
| 7280SR3-40YC6 | Jericho2C Q2A |
| 7280SR-48C6 | QumranMX |
| 7280SRA-48C6 | QumranMX |
| 7280SRAM-48C6 | QumranMX |
| 7280SRM-40CX2 | QumranMX |
| 7280TR3-40C6 | Jericho2C Q2A |
| 7280TR-48C6 | QumranMX |
| 7280TRA-48C6 | QumranMX |
| DCS-7304 | Trident3 |
| DCS-7304 | Tomahawk |
| DCS-7304 | Trident2 |
| DCS-7308 | Trident3 |
| DCS-7308 | Tomahawk |
| DCS-7308 | Trident2 |
| DCS-7316 | Trident2 |
| DCS-7368X4 | Tomahawk3 |
| DCS-7504 | Petra |
| DCS-7504E | Arad/Arad+ |
| DCS-7504N | Jericho 2 |
| DCS-7504N | Jericho/Jericho+ |
| DCS-7508 | Petra |
| DCS-7508E | Arad/Arad+ |
| DCS-7508N | Jericho 2 |
| DCS-7508N | Jericho/Jericho+ |
| DCS-7512N | Jericho 2 |
| DCS-7512N | Jericho/Jericho+ |
| DCS-7516N | Jericho/Jericho+ |
| DCS-7804-CH | Jericho 2 |
| DCS-7808-CH | Jericho 2 |