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Enterasys Networks XSR CLI Router User Manual

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Route Map Commands

XSR CLI Reference Guide 6-111

Syntax of the “no” Form

Thenoformofthiscommandremovesthepatchlistnumber:

no match as-path path-list-number

Mode

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

Example

Thisexamplesetsthematchas‐pathinthecontextofconfiguringaroutemapandas‐pathACL33.

XSR(config)#route-map 1 permit 1

XSR(config-route-map)#match as-path 33

XSR(config-route-map)#set local-preference 300

XSR(config-route-map)#exit

XSR(config)#ip as-path access-list 33 permit “.* 550 .*”

Routemap1isconfiguredwiththeoptionalpermitkeywordandsequencenumber1.Ifthese

valuesareomitted,aroutemapwilldefaulttothepermitkeywordandsequencenumber10.

Afterroutemap1isdefinedviathe

route-mapcommand,youenterthematch as-path

commandwhichreferencesas‐pathaccesslist33‐thelastconfigurationstatementintheexample.

AS‐pathaccesslist33endswitharegularexpression“.*550.*”,indicatingamatchwilloccurifthe

as_pathvariableinaBGPupdatemessagecontainsASnumber550.

Ifamatchoccurs,

thentheset local-preferencecommandsetsthelocalpreferenceattribute

forthematchingBGPupdatesto300,overridingthedefaultvalueof100.Arouteflaggedwitha

higherlocalpreferencevalueismorepreferabletoaroutewithalowerlocalpreference.

Consequently,theroutespassingthroughAS550becomemorepreferable

tootherroutesforthe

samedestinations.

match community-list

ThiscommandmatchesthecommunityattributeinaBGProuting updatemessagewiththe

valuesofthecommunityat tributeidentifiedthroughthecommunityaccesslist.

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 community-list community-list-number

Syntax of the “no” Form

Thenoformofthiscommandremovesthecommunitylistnumber:

no match community-list community-list-number

community-list-number

CommunityACLtomatchbynumber,rangingfrom1to199.

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