Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 504)

Displaying route flap dampening statistics
To display route dampening statistics or all the dampened routes, enter the following command at any
level of the CLI.
device# show ip bgp flap-statistics
Total number of flapping routes: 414
Status Code >:best d:damped h:history *:valid
Network From Flaps Since Reuse Path
h> 10.50.206.0/23 10.90.213.77 1 0 :0 :13 0 :0 :0 65001 4355 1 701
h> 10.255.192.0/20 10.90.213.77 1 0 :0 :13 0 :0 :0 65001 4355 1 7018
h> 10.252.165.0/24 10.90.213.77 1 0 :0 :13 0 :0 :0 65001 4355 1 7018
h> 10.50.208.0/23 10.90.213.77 1 0 :0 :13 0 :0 :0 65001 4355 1 701
h> 10.33.0.0/16 10.90.213.77 1 0 :0 :13 0 :0 :0 65001 4355 1 701
*> 10.17.220.0/24 10.90.213.77 1 0 :1 :4 0 :0 :0 65001 4355 701 62
Syntax: show ip bgp flap-statistics [ regular-expression regular-expression | address mask [
longer-prefixes ] | neighbor ip-addr | filter-list num ... ]
The regular-expressionregular-expression parameter is a regular expression. The regular
expressions are the same ones supported for BGP4 AS-path filters.
The address mask parameters specify a particular route. If you also use the optional longer-prefixes
parameter, all statistics for routes that match the specified route or have a longer prefix than the
specified route are displayed. For example, if you specify 10.157.0.0 longer , all routes with the prefix
10.157 or that have a longer prefix (such as 10.157.22) are displayed.
The neighborip-addr parameter displays route flap dampening statistics only for routes learned from
the specified neighbor. You can also display route flap statistics for routes learned from a neighbor by
entering the show ip bgp neighbor flap-statistics command.
The filter-listnum parameter specifies one or more filters. Only routes that have been dampened and
that match the specified filters are displayed.
show ip bgp flap-statistics output descriptions TABLE 102
This field Displays
Total number of
flapping routes The total number of routes in the BGP4 route table that have changed state and have
been marked as flapping routes.
Status code The dampening status of the route, which can be one of the following:
• > - This is the best route among those in the BGP4 route table to the route
destination.
• d - This route is currently dampened, and thus unusable.
• h - The route has a history of flapping and is unreachable now.
• * - The route has a history of flapping but is currently usable.
Network The destination network of the route.
From The neighbor that sent the route to this device.
Flaps The number of flaps (state changes) the route has experienced.
Since The amount of time since the first flap of this route.
Reuse The amount of time remaining until this route will be un-suppressed and thus be usable
again.
Displaying route flap dampening statistics
504 FastIron Ethernet Switch Layer 3 Routing Configuration Guide
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