Brocade BigIron RX Series Configuration Guide User Manual
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BigIron RX Series Configuration Guide
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Filtering
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Syntax: show ip bgp flap-statistics [regular-expression <regular-expression> | <address> <mask>
[longer-prefixes] | neighbor <ip-addr>]
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
The <address> <mask> parameter specifies a particular route. If you also use the optional
longer-prefixes parameter, then 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 209.157.0.0 longer,
then all routes with the prefix 209.157. or that have a longer prefix (such as 209.157.22.) are
displayed.
The neighbor <ip-addr> parameter displays route flap dampening statistics only for routes learned
from the specified neighbor. You also can display route flap statistics for routes learned from a
neighbor by entering the following command: <ip-addr> flap-statistics.
This display shows the following information.
You also can display all the dampened routes by entering the following command.
show ip bgp dampened-paths.
TABLE 135
Route flap dampening statistics
This field...
Displays...
Total number of flapping routes
The total number of routes in the device’s BGP4 route table that have
changed state and thus have been marked as flapping routes.
Status code
Indicates 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’s 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 the 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
Shows the AS-path information for the route.
BigIron RX# 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> 192.50.206.0/23
166.90.213.77
1
0 :0 :13 0 :0 :0 65001 4355 1 701
h> 203.255.192.0/20
166.90.213.77
1
0 :0 :13 0 :0 :0 65001 4355 1 7018
h> 203.252.165.0/24
166.90.213.77
1
0 :0 :13 0 :0 :0 65001 4355 1 7018
h> 192.50.208.0/23
166.90.213.77
1
0 :0 :13 0 :0 :0 65001 4355 1 701
h> 133.33.0.0/16
166.90.213.77
1
0 :0 :13 0 :0 :0 65001 4355 1 701
*> 204.17.220.0/24
166.90.213.77
1
0 :1 :4 0 :0 :0 65001 4355 701 62