Cisco NCS 5500 Series Command Reference

set cos
To set the Layer 2 class of service (CoS) value of an outgoing packet, use the set cos command in policy
map class configuration mode. To remove a specific CoS value setting, use the no form of this command.
set cos cos-value
no set cos cos-value
Syntax Description
Specific IEEE 802.1Q CoS value from 0 to 7.
cos-value
Command Default
No Layer 2 CoS value of an outgoing packet is set.
Command Modes
Policy map class configuration
Command History
ModificationRelease
This command was introduced.Release 6.1.2
Usage Guidelines
Use the set cos command to mark a packet that is being sent to a switch. Switches can leverage Layer 2
header information, including a CoS value marking.
The set cos command is supported only in the ingress direction. Only unconditional COS marking in the
ingress direction is supported.
Task ID
OperationsTask
ID
read,
write
qos
Examples
In this example, the policy map called cos-set is created to assign different CoS values for different
service classes, and then is attached to the output interface HundredGigE 0/0/0/3.
RP/0/RP0/CPU0:router(config)# policy-map cos-set
RP/0/RP0/CPU0:router(config-pmap)# class class1...
RP/0/RP0/CPU0:router(config-pmap-c)# set cos 1
RP/0/RP0/CPU0:router(config-pmap-c)# exit
RP/0/RP0/CPU0:router(config-pmap)# class class2...
RP/0/RP0/CPU0:router(config-pmap-c)#set cos 2
RP/0/RP0/CPU0:router(config-pmap-c)#exit
RP/0/RP0/CPU0:router(config-pmap)# interface HundredGigE 0/0/0/3
RP/0/RP0/CPU0:router(config-if)# service-policy input cos-set
Modular QoS Command Reference for Cisco NCS 5500 Series and Cisco NCS 540 Series Routers
29
QoS Classification Commands
set cos

Cisco NCS 5500 Series Specifications

General

Series	NCS 5500
Category	Network Router
Operating System	Cisco IOS XR
Product Type	Modular Router
Form Factor	Rack-mountable
Purpose	High-performance routing for service providers and large enterprises
Interface Types	Ethernet
Redundancy	Redundant power supplies and fan trays
Port Density	Varies by model; high-density configurations available
Routing Protocols	BGP, OSPF, IS-IS, MPLS
Power Supply Options	AC and DC power supplies available
Management	CLI, SNMP, NETCONF