Cisco CRS Command Reference Guide

match mpls experimental topmost
To identify specific three-bit experimental (EXP) field values in the topmost Multiprotocol Label Switching
(MPLS) label as match criteria for a class map, use the match mpls experimental topmost command in
class map configuration mode. To remove experimental field values from the class map match criteria, use
the no form of the command.
match [not] mpls experimental topmost exp-value [exp-value1 ...exp-value7]
no match [not] mpls experimental topmost exp-value [exp-value1 ...exp-value7]
Syntax Description
(Optional) Negates the specified match result.not
Experimental value that specifies the exact value from 0 to 7. Up to eight
experimental values can be specified to match MPLS headers.
exp-value
Command Default
No default behavior or values
Command Modes
Class map configuration
Command History
ModificationRelease
This command was introduced.Release 2.0
The not keyword was added.Release 3.3.0
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
The match mpls experimental topmost command is used by the class map to identify MPLS experimental
values matching on a packet.
To use the match mpls experimental topmost command, you must first enter the class-map command to
specify the name of the class whose match criteria you want to establish. If you specify more than one match
mpls experimental topmost command in a class map, the new values are added to the existing match statement.
This command examines the three experimental bits contained in the topmost label of an MPLS packet. Up
to eight experimental values can be matched in one match statement. For example, match mpls experimental
topmost 2 4 5 7 returns matches for experimental values of 2, 4, 5, and 7. Only one of the four values is
needed to yield a match (OR operation).
The experimental values are used as a matching criterion only. The value has no mathematical significance.
For instance, the experimental value 2 is not greater than 1. The value indicates that a packet marked with the
Cisco IOS XR Modular Quality of Service Command Reference for the Cisco CRS Router, Release 4.0
48 OL-23235-03
Quality of Service Commands on the Cisco IOS XR Software
match mpls experimental topmost

Cisco CRS Specifications

General

Brand	Cisco
Model	CRS
Category	Network Router
Language	English