Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 169)

Multi-Service IronWare Routing Configuration Guide 141
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Displaying BGP4 information
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.
Syntax: show ip bgp flap-statistics [regular-expression regular-expression | address mask
[longer-prefixes] | neighbor ip-addr | filter-list num...]
The regular-expression regular-expression parameter is a regular expression. The regular
expressions are the same ones supported for BGP4 AS-path filters. Refer to
“Using regular
expressions” on page 77.
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 neighbor ip-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 ip-addr flap-statistics.command.
The filter-list num parameter specifies one or more filters. Only routes that have been dampened
and that match the specified filters are displayed.
This display shows the following information.
TABLE 14 Route flap dampening statistics
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.
Path The AS-path information for the route.
Brocade# 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