Monitoring BGP Flap Statistics

Purpose

Display information about BGP flap statistics

The show ip bgp flap-statistics and show bgp ipv6 flap-statistics commands display similar information.

Action

To display information about flap statistics:

host1#show ip bgp flap-statistics
Local BGP identifier 192.168.1.232, local AS 100
  Route flap dampening is enabled
  Default decay half-life is 15 minutes
  Default cutoff threshold is 2000, default reuse threshold is 750
  Default maximum hold-down time is 60 minutes
  307 paths have active route flap histories (27016 bytes used)
  5 paths are suppressed
                                                  Figure      Time until
Prefix             Peer            Status         of Merit     Reuse/Remove
24.201.0.0/18      192.168.1.158   Available       925         00:58:23
24.201.64.0/18     192.168.1.158   Available       925         00:58:23
52.128.224.0/19    192.168.1.158   Available       750         00:54:12
61.8.0.0/19        192.168.1.158   Available       993         00:59:53
61.8.30.0/24       192.168.1.158   Available       993         00:59:53
62.229.73.0/24     192.168.1.158   Unreachable     925         00:58:23
63.69.150.0/24     192.168.1.158   Available       750         00:54:12

Meaning

Table 33 lists the show ip bgp flap-statistics command output fields.

Table 33: show ip bgp flap-statistics Output Fields

Field Name	Field Description
Local BGP identifier	BGP router ID of the local router
local AS	Local autonomous system number
Route flap dampening	Status of route flap dampening (enabled or disabled)
Default decay half-life	Time (in minutes) after which a penalty is decreased. After the route has been assigned a penalty, the penalty is decreased by half after the half-life period (which is 15 minutes by default).
Default cutoff threshold	Value of the penalty for a flapping route below which the route is unsuppressed
Default reuse threshold	Time (in hours:minutes:seconds) after which the path will be made available
Default maximum hold-down time	Interval, in seconds, after not receiving a keepalive message that the software declares a peer dead
route flap history	Status of route flap history for route paths
Prefix	Prefix for the routing table entry
Peer	IP address of BGP peer
Status	Status of route dampening of the route path
Figure of Merit	A measure of the route's stability. Higher values indicate more recent route flap activity or less stability.
Time until Reuse/Remove	Time until the route is either reused (if currently suppressed) or its history entry is removed (if currently available)

Monitoring BGP Flap Statistics

Purpose

Action

Meaning

Related Documentation