Cisco CRS Command Reference Guide

The match dscp command examines the higher-order six bits in the type of service (ToS) byte of the IP
header. Only one of the eight values is needed to yield a match (OR operation).
The command supports only eight IP DSCP values. If you try to configure more match statements after all
the eight values are matched, the statements get rejected.
The IP DSCP value is used as a matching criterion only. The value has no mathematical significance. For
instance, the IP DSCP value 2 is not greater than 1. The value simply indicates that a packet marked with the
IP DSCP value of 2 should be treated differently than a packet marked with an IP DSCP value of 1. The
treatment of these marked packets is defined by the user through the setting of QoS policies in policy map
class configuration mode.
Table 2: IP DSCP Reserved Keywords
Reserved KeywordDSCP Value
default0
AF1110
AF1212
AF1314
AF2118
AF2220
AF2322
AF3126
AF3228
AF3330
AF4134
AF4236
AF4338
EF46
CS18
CS216
CS324
CS432
Cisco IOS XR Modular Quality of Service Command Reference for the Cisco CRS Router, Release 4.0
OL-23235-03 45
Quality of Service Commands on the Cisco IOS XR Software
match dscp

Cisco CRS Specifications

General

Brand	Cisco
Model	CRS
Category	Network Router
Language	English