Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 574)

546 Multi-Service IronWare Routing Configuration Guide
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Displaying BGP4+ information
Displaying route flap dampening statistics
To display route dampening statistics for all dampened routes, enter the following command at any
level of the CLI.
Syntax: show ipv6 bgp flap-statistics [ipv6-prefix/prefix-length [longer-prefixes] | as-path-filter
number | neighbor ipv6-address | regular-expression regular-expression]
The ipv6-prefix/prefix-length parameter displays statistics for the specified IPv6 prefix only. You
must specify the ipv6-prefix parameter in hexadecimal using 16-bit values between colons as
documented in RFC 2373. You must specify the prefix-length parameter as a decimal value. A slash
mark (/) must follow the ipv6-prefix parameter and precede the prefix-length parameter.
The longer-prefixes keyword allows you to display statistics for routes that match a specified or
longer IPv6 prefix. For example, if you specify 2001:db8::/32 longer-prefixes, then all routes with
the prefix 2001:db8::/32 or that have a longer prefix (such as 2001db8::e016::/48) are displayed.
The as-path-filter number parameter specifies an AS path filter to display. Specify a filter number.
The neighbor ipv6-address parameter displays statistics for routes learned from the specified
neighbor only. You also can display route flap statistics for routes learned from a neighbor by
entering the following command: show ipv6 bgp neighbor ipv6-address flap-statistics.
The regular-expression regular-expression parameter is a regular expression. The regular
expressions are the same ones supported for BGP4 AS-path filters.
You can also display route flap dampening statistics for a specified IPv6 neighbor. For more
information, refer to
“Displaying route flap dampening statistics for a BGP4+ neighbor” on
page 557.
This display shows the following information.
TABLE 107 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 IPv6 address of the advertising peer.
Flaps The number of flaps (state changes) the route has experienced.
Since The amount of time (in hh:mm:ss) since the first flap of this route.
Brocade# show ipv6 bgp flap-statistics
Total number of flapping routes: 14
Status Code >:best d:damped h:history *:valid
Network From Flaps Since Reuse Path
h> 2001:db8:2::/48 2001:db8:23::47 1 0 :0 :13 0 :0 :0 65001 4355 1 701
*> 2001:db8:34::/48 2001:db8:23::47 1 0 :1 :4 0 :0 :0 65001 4355 701 62