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Enterasys Networks XSR CLI Router User Manual

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BGP Set Commands

XSR CLI Reference Guide 6-117

•TheXSRpenalizesaroutemarkedasunstablewithavalueof1024eachtimeitfails.If

penaltiesaccruebeyondthesuppressthresholdyouset,therouteisnolongeradvertised.

•TheXSRpermitssuppressedroutestorejointheBGProuting tablewhentheirpenaltiesdrop

belowthethreshold.

•Aftera

routeassumesapenalty,theXSRcutsthepenaltyinhalfeachtimeahalf‐lifeinterval

youconfigureelapses.

•Whenpenaltiesdropbelowtheconfigurablereusevalue,theXSRfreestheroute,re‐inserting

itintotheBGProutingtable.

•TheXSRdoesnotsuppressroutesindefinitely.Youcan set

themax‐suppressvalueandfixthe

maximumperiodaroutecanbesuppressedbeforeitisadvertisedagain.

Syntax

set dampening half-life | reuse | suppress | suppress-max

Syntax of the “no” Form

Thenoformofthiscommandremovesroutedampening:

no set dampening

Mode

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

Defaults

•Half‐life:15minutes

•Reuse:750seconds

• Suppress:2000

• Suppress‐max:60minutes‐fourtimesthehalf‐lifevalue.

Example

ThisexampledisplaystheuseofthesetdampeningforIPprefix10.0.0.0forBGPprocess100:

XSR(config)#ip access-list 10 permit 10.0.0.0 255.0.0.0

XSR(config)#route-map 1 permit 1

XSR(config-route-map)#match ip address 10

XSR(config-route-map)#set 30 1500 10000 120

half-life

Intervalafterwhichtheroute’spenaltybecomeshalfitsvalue,rangingfrom1

to45minutes.

reuse

Specifieshowlowaroute’spenaltymustbecomebeforetheroutebecomes

eligibleforuseagainafterbeingsuppressed,rangingfrom1to20,000seconds.

suppress

Specifieshowhigharoute’spenaltymustbecomebeforetherouteis

suppressed,rangingfrom1to20,000.

suppress-max

Specifiesthatmaximumintervalinminutesthataroutecanbesuppressed

regardlessofhowunsta b leitis,rangingfrom1to20,000minutes.

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