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Enterasys Networks XSR CLI Router User Manual

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BGP Configuration Commands

6-90 Configuring the Border Gateway Protocol

bgp dampening

ThiscommandenablesBGProutedampeningtominimizepropagationofflappingroutes

(repeatedlyavailable/unavailable)acrossthenetwork.Eachtimearouteflaps,apenaltyvalueof

1024isassignedtothatroute.

Syntax

bgp dampening [half-life | reuse | suppress | suppress-max][route-map route-map-

number]

Syntax of the “no” Form

ThenoformofthiscommanddisablesBGPdampening:

no bgp dampening

Mode

Routerconfiguration:XSR(config-router)#

Defaults

• Half‐life‐15minutes

• Reuse‐750

• Suppress‐2000

• Suppress‐max‐60minutes

•Disabled.

Example

Thefollowingexampleenablesrouteflapdampening:

XSR(config)#router bgp 100

XSR(config)#bgp dampening

half-life

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

from1to45minutes.

reuse

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

eligibleforuseagainafterbeingsuppressed,rangingfrom1to20000.

suppress

Howhigharoute’spenaltymustbecomebeforetherouteissuppressed,

rangingfrom1to20000.

suppress-max

Peakintervalaroutecanbesuppressedregardlessofhowunstableitis.

Range:1to255minutes.

route-map-number

Routemapnumberappliedtodampenedroutes,rangingfrom1to199.

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