set

Sets CoS value, PHB value, and IP DSCP value in matching packets

Supported in the following platforms:

Syntax

set [cos <0-7>|ip dscp <0-63>|phb <0-7>]

Parameters

set [cos <0-7>|ip dscp <0-63>|phb <0-7>]
set Sets the match criteria used to identify and classify traffic into different classes. The match criteria options are: CoS, IP DSCP, and PHB values.
cos <0-7> Configures the CoS value for a matching packet (as specified by the match command) in the packet‘s VLAN tag
  • <0-7> – Specify a value from 0 - 7. The CoS is modified to the value specified here.
ip dscp <0-63> Modifies the IP DSCP value in a matching packet (as specified by the match command)
  • <0-63> – Specify a value from 0 - 63. The DSCP value is modified to the value specified here.
phb <0-7> Configures a PHB value for a matching packets
  • <0-7> – Specify a value from 0 -7.
The PHB label is composed of five bits, three bits for per-hop behavior, and two bits for the color scheme used to control queue congestion. A packet is marked green, yellow, or red as per the following:
  • green if it does not exceed the CIR and BC limits
  • yellow if it exceeds the CIR and BC limits, but not the BE limit, and
  • red otherwise.

Examples

The following example uses the set > phb command to classify the service that incoming packets will receive, and then uses the police > trtcm-color-blind command to limit the average bandwidth to 100,000 Kbps, the committed burst rate to 4000 bytes, the peak information rate to 1,000,000 Kbps, the peak burst size to 6000 bytes, to remark any packets exceeding the committed burst size, and to drop any packets exceeding the peak information rate.

nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-test2)#set phb 3
nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-test2)# police 
trtcm-color-blind 100000 4000 1000000 6000 conform-action transmit exceed-action 0 violate-action drop
nx9500-6C8809nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-test2)#show
context
 class test2
  set phb 3
  police trtcm-color-blind 100000 4000 100000 6000 conform-action transmit exceed-action 0 violate-action drop
nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-test2)#

The following example uses the set > ip dscp command to classify the service that incoming packets will receive, and then uses the police > flow command to limit the average bandwidth to 100,000 Kbps, the burst rate to 4000 bytes, and configure the response to drop any violating packets:

nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-dscp)#set ip  dscp 3
nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-dscp)# police flow 100000 4000 
conform-action transmit violate-action drop
nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-dscp)#show context
 class dscp
  set ip dscp 3
  police flow 100000 4000 conform-action transmit violate-action drop
nx9500-6C8809(config-ex3500-qos-policy-map-testPolicyMap-pmap-class-dscp)#

Related Commands

no (ex3500-traffic-class-config-commands) Removes CoS value, PHB value, or IP DSCP value from this traffic class
9037762-01 Rev AA