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Enterasys Networks XSR CLI Router User Manual

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Policy-Map Commands

12-100 Configuring Quality of Service

Mode

Policy‐MapClassconfiguration:XSR(config-pmap-c-xx)#

Example

ThefollowingexamplesetstheIPPrecedencebitto7forpacketsthatsatisfythematchcriteriaof

theclassmapcalledclass39.Allpacketsthatsatisfythematchcriteriaofclass39aremarkedwith

theIPPrecedencevalueof7.HowpacketsmarkedwiththeIPPrecedencevalueof

7aretreatedis

determinedbyyournetworkconfiguration.

XSR(config)#policy-map policy57

XSR(config-pmap<policy57>)#class class39

XSR(config-pmap-c<class39>)#set ip precedence 7

shape

Thiscommandenablesandconfigurestrafficshapingonaclass.Itcanbeappliedtoanyfair‐class

orpriorityclass.Thedefaultburstissufficienttoachievetheaveragerateandiscalculatedfrom

therateandthedefaultmeasurementintervalof10milliseconds:

Burstequalsratemultipliedby(10

millisecondsdividedby1000)

Inordertosustaintheaveragerate,thenormalburstcannotbelessthanthedefaultburst.The

defaultvalueforexceedburstisequaltothenormalburst.

Syntax

shape rate [[burst]exceed-burst]

Syntax of the “no” Form

Thenoformofthiscommanddisablestrafficshapingonaclass:

no shape

Default

Disabled

Mode

Policy‐MapClassconfiguration:XSR(config-pmap-c-xx)#

Example

ThefollowingexampleconfiguresClassAwith20%ofthelinkbandwidthtoamaximumof64

Kbytesandmaximumburstof2000bytes:

XSR(config)#policy-map foo

XSR(config-pmap<foo>)#class A

XSR(config-pmap-c<a>)#bandwidth percent 20

XSR(config-pmap-c<a>)#shape 64000 2000

rate

Averageorpeakrateforoutputtrafficinbbps.

burst

Maximumthresholdburstsize.Range:1to20,000bytes.

exceed-burst

Maximumexceedburstsize.Range1to40,000bytes.

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