Foundry Networks FESX User Manual

Configuring BGP4
December 2005 © Foundry Networks, Inc. 21 - 63
The following command verifies that the route has been unsuppressed.
Displaying and Clearing Route Flap Dampening Statistics
The software provides many options for displaying and clearing route flap statistics. To display the statistics, use
either of the following methods.
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>]
The regular-expression <regular-expression> parameter is a regular expression. The regular expressions are
the same ones supported for BGP4 AS-path filters. See “Using Regular Expressions” on page 21-42.
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: show ip bgp neighbor <ip-addr> flap-statistics.
This display shows the following information.
Table 21.4: Route Flap Dampening Statistics
This Field... Displays...
Total number of flapping routes The total number of routes in the Layer 3 Switch’s BGP4 route table
that have changed state and thus have been marked as flapping
routes.
FESX424 Router(config-bgp-router)# show ip bgp route 209.1.44.0/24
Number of BGP Routes matching display condition : 1
Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH S:SUPPRESSED F:FILTERED
Prefix Next Hop Metric LocPrf Weight Status
1 209.1.44.0/24 10.2.0.1 1 101 32768 BLS
AS_PATH:
Route is advertised to 1 peers:
10.1.0.2(4)
FESX424 Router# 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

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English