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Enterasys Networks XSR CLI Router User Manual

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Route Map Commands

6-112 Configuring the Border Gateway Protocol

Mode

Route‐mapconfiguration:XSRA(config-route-map)#

Default

Nomatchbasedoncommunitylist

Example

Thefollowingexampleconfiguresthematchcommunityvalueinthecontextofconfiguringa

routemapnamed1andcommunitylist77onXSRAandXSRB:

RouterAconfiguration:

XSRA(config)#route-map 1 permit 1

XSRA(config-route-map)#match community 77

XSRA(config-route-map)#set local-preference 500

XSRA(config-route-map)#exit

XSRA(config)#ip community-list 77 permit 300:22

RouterBconfiguration:

XSRB(config)#route-map 1 permit 1

XSRB(config-route-map)#match community 77

XSRB(config-route-map)#set local-preference 200

XSRB(config-route-map)#exit

XSRB(config)#ip community-list 77 permit 300:22

XSRAandXSRBareborderrouterswithinthesameAS.Thecommunityisidentifiedbyname

300:22.Thenumericforma taa:nn,whereaaandnnrepresenttwo‐bytenumbers,isoneofthe

allowableformatsforcommunity names. BGPupdatesmatchingcommunityname300:22are

assignedahigherlocalpreference

onXSRA(500)thanonXSRB(200).ThismakesXSRAthe

preferableexitpointfromthisASforthenetworksthathavebeengroupedunderthecommunity

name300:22.Usethe

set communitycommandtoassigncommunitynames.

match metric

ThiscommandmatchestheMEDattributeinaBGProutingupdatemessage.Aroutemustmatch

atleastonematchstatementofa

route-map command.Ifaroutedoesnotmatchanymatch

statements,therouteisnotadvertisedonoutboundroutemapsandisnotacceptedoninbound

routemaps.

Syntax

match metric metric-value

Syntax of the “no” Form

Thenoformofthiscommandremovesthematchmetricvalue:

no match metric metric-value

metric-value

MEDvaluetomatch,rangingfrom0to2147483647.

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