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Monitoring And Maintaining Bgp - Cisco Catalyst 3750-E Software Configuration Manual

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Configuring BGP
Beginning in privileged EXEC mode, use these commands to configure BGP route dampening:
Command
Step 1
configure terminal
Step 2
router bgp autonomous-system
Step 3
bgp dampening
Step 4
bgp dampening half-life reuse suppress
max-suppress [route-map map]
Step 5
end
Step 6
show ip bgp flap-statistics [{regexp regexp} |
{filter-list list} | {address mask [longer-prefix]}]
Step 7
show ip bgp dampened-paths
Step 8
clear ip bgp flap-statistics [{regexp regexp} |
{filter-list list} | {address mask [longer-prefix]}
Step 9
clear ip bgp dampening
Step 10
copy running-config startup-config
To disable flap dampening, use the no bgp dampening router configuration command without
keywords. To set dampening factors back to the default values, use the no bgp dampening router
configuration command with values.

Monitoring and Maintaining BGP

You can remove all contents of a particular cache, table, or database. This might be necessary when the
contents of the particular structure have become or are suspected to be invalid.
You can display specific statistics, such as the contents of BGP routing tables, caches, and databases.
You can use the information to get resource utilization and solve network problems. You can also display
information about node reachability and discover the routing path your device's packets are taking
through the network.
Table 40-8
the display fields, see the Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols,
Release 12.2.
Table 40-11
IP BGP Clear and Show Commands
Command
clear ip bgp address
clear ip bgp *
clear ip bgp peer-group tag
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
40-64
lists the privileged EXEC commands for clearing and displaying BGP. For explanations of
Purpose
Reset a particular BGP connection.
Reset all BGP connections.
Remove all members of a BGP peer group.
Purpose
Enter global configuration mode.
Enter BGP router configuration mode.
Enable BGP route dampening.
(Optional) Change the default values of route dampening
factors.
Return to privileged EXEC mode.
(Optional) Monitor the flaps of all paths that are flapping. The
statistics are deleted when the route is not suppressed and is
stable.
(Optional) Display the dampened routes, including the time
remaining before they are suppressed.
(Optional) Clear BGP flap statistics to make it less likely that a
route will be dampened.
(Optional) Clear route dampening information, and unsuppress
the suppressed routes.
(Optional) Save your entries in the configuration file.
Chapter 40
Configuring IP Unicast Routing
OL-9775-08

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