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Enterasys Networks XSR CLI Router User Manual

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Class-map Commands

12-104 Configuring Quality of Service

Syntax

match ip dscp ip-dscp-value [ip-dscp-value][ip-dscp-value] [ip-dscp-value] [ip-

dscp-value][ip-dscp-value][ip-dscp-value][ip-dscp-value]

Syntax of the “no” Form

ToremoveaspecificIPDSCPvaluefromaclassmap,usethenoformofthiscommand:

no match ip dscp ip-dscp-value [ip-dscp-value][ip-dscp-value][ip-dscp-value][ip-

dscp-value][ip-dscp-value][ip-dscp-value][ip-dscp-value]

Mode

Class‐mapconfiguration:XSR(config-cmap-xx)#

Example

Thefollowingexampleshowshowtoconfiguretheservicepolicycalledpriority55andattach

servicepolicypriority55toaninterface.Inthisexample,theclassmapipdscp15willevaluateall

packetsenteringinterfaceF1foranIPDSCPvalueof15.Iftheincomingpackethasbeenmarked

withthe

IPDSCPvalueof15,thepacketwillbetreatedwithahighprioritylevel.

XSR(config)#class-map ipdscp15

XSR(config-cmap<ipdscp15>)#match ip dscp 15

XSR(config)#policy-map priority55

XSR(config-pmap<priority55>)#class ipdscp15

XSR(config-pmap-c<ipdscp15>)#priority high 55

XSR(config)#interface fastethernet 1

XSR(config-if<F1>)#service-policy output priority55

match ip precedence

ThiscommandidentifiesIPprecedencevaluesasmatchcriteria.Upto4precedencevaluescanbe

matchedinonematchstatement.Forexample,ifyouwantedtheIPprecedencevaluesof0,1,2,or

3(notethatonlyoneoftheIPprecedencevaluesmustbeasuccessfulmatchcriterion,

notallofthe

specifiedIPprecedencevalues),enterthe

match ip precedence 0 1 2 3command.

Theip‐precedence‐valueargumentsareusedasmarkingsonly,theyhavenomathematical

significance.Forinstance,theip‐precedence‐valueof2isnotgreaterthan1. Thevaluesimply

indicatesthatapacketmarkedwiththeip‐precedence‐valueof2isdifferentthanapacketmarked

with

theip‐precedence‐valueof1.Youdefinethetreatmentofthesedifferentpacketsbysetting

QoSpoliciesinPolicy‐mapClassconfigurationmode.

Syntax

match ip precedence ip-precedence-value [ip-precedence-value] [ip-precedence-

value][ip-precedence-value][ip-precedence-value][ip-precedence-value][ip-

precedence-value] [ip-precedence-value][ip-precedence-value]

ip-dscp-value

Specifiesavaluefrom0to63toidentifyanIPDSCPvalue.

ip-precedence-value

SpecifiesanIPprecedencevaluefrom0to7.

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