Enterasys Networks XSR CLI - page 313

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unstableitis,rangingfrom1to20,000minutes.