Chapter 50
| IP Routing Commands
Border Gateway Protocol (BGPv4)
– 1126 –
show ip bgp
dampening
This command shows dampened routes.
Syntax
show ip bgp dampening {dampened-paths | flap-statistics | parameters}
dampened-paths – Routes suppressed due to dampening.
flap-statistics – Statistics for flapping route prefixes.
parameters – Route dampening parameters.
Command Mode
Privileged Exec
Example
In the following example, “From” indicates the peer that advertised this path, while
“Reuse” is the time after which the path will be made available.
Console#show ip bgp dampening dampened-paths
BGP table version is 0, local router ID is 192.168.0.2
Status codes: s suppressed, d damped, h history, * valid, > best, i internal,
r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network From Reuse Path
*d 100.1.3.0/24 10.1.1.64 00:27:40 100 ?
Total number of prefixes 1
Console#
In this example, “Duration” indicates the time since the first flap occurred.
Console#show ip bgp dampening flap-statistics
BGP table version is 0, local router ID is 192.168.0.2
Status codes: s suppressed, d damped, h history, * valid, > best, i internal,
r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network From Flaps Duration Reuse Path
*d 100.1.3.0/24 10.1.1.64 3 00:06:05 00:27:00 100 ?
Total number of prefixes 1
Console#
This example shows the dampening parameters configured on this router.
Console#show ip bgp dampening parameters
Dampening 15 750 2000 60
Reachability half-life time :15 min
Reuse penalty :750
Suppress penalty :2000
Max suppress time :60 min
Console#
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