Cisco ASR 900 Series Configuration Guide

Marking MPLS EXP on Imposed Labels
In typical configurations, marking MPLS packets at imposition is used with ingress classification on IP ToS
or CoS fields. However, generic matching with the class default value is supported with other ingress attributes
such as vlan.
For EVC configuration, a policy map that performs matching based on the CoS, and that sets the EXP
imposition value, should be used to copy CoS values to the EXP value.
Note
The set mpls experimental imposition command works only on packets that have new or additional
MPLS labels added to them.
Note
enable
configure terminal
policy-map policy-map-name
class class-map-name
set mpls experimental imposition mpls-exp-value
end
Classifying and Marking MPLS EXP
The set mpls experimental topmost command works only on packets that are already MPLS encapsulated.Note
enable
configure terminal
policy-map policy-map-name
class class-map-name
set mpls experimental topmost mpls-exp-value
end
Configuration Examples
Example: Defining an MPLS EXP Class Map
Example: Defining an MPLS EXP Class Map
The following example defines a class map named exp3 that matches packets that contains MPLS experimental
value 3:
Router(config)# class-map exp3
Router(config-cmap)# match mpls experimental topmost 3
Router(config-cmap)# exit
1-Port OC-192 or 8-Port Low Rate CEM Interface Module Configuration Guide, Cisco IOS XE Everest 16.7.x (Cisco
ASR 900 Series)
13
CEM over MPLS QoS
Marking MPLS EXP on Imposed Labels

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English