Cisco Systems 3560 사용자 설명서
36-60
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 36 Configuring IP Unicast Routing
Configuring BGP
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.
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.
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.
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.
lists the privileged EXEC commands for clearing and displaying BGP. For explanations of
the display fields, see the Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols,
Release 12.2 from the Cisco.com page under Documentation > Cisco IOS Software > 12.2 Mainline
> Command References.
Release 12.2 from the Cisco.com page under Documentation > Cisco IOS Software > 12.2 Mainline
> Command References.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
router bgp autonomous-system
Enter BGP router configuration mode.
Step 3
bgp dampening
Enable BGP route dampening.
Step 4
bgp dampening half-life reuse suppress
max-suppress [route-map map]
max-suppress [route-map map]
(Optional) Change the default values of route dampening
factors.
factors.
Step 5
end
Return to privileged EXEC mode.
Step 6
show ip bgp flap-statistics [{regexp regexp} |
{filter-list list} | {address mask [longer-prefix]}]
{filter-list list} | {address mask [longer-prefix]}]
(Optional) Monitor the flaps of all paths that are flapping. The
statistics are deleted when the route is not suppressed and is
stable.
statistics are deleted when the route is not suppressed and is
stable.
Step 7
show ip bgp dampened-paths
(Optional) Display the dampened routes, including the time
remaining before they are suppressed.
remaining before they are suppressed.
Step 8
clear ip bgp flap-statistics [{regexp regexp} |
{filter-list list} | {address mask [longer-prefix]}
{filter-list list} | {address mask [longer-prefix]}
(Optional) Clear BGP flap statistics to make it less likely that a
route will be dampened.
route will be dampened.
Step 9
clear ip bgp dampening
(Optional) Clear route dampening information, and unsuppress
the suppressed routes.
the suppressed routes.
Step 10
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Table 36-11
IP BGP Clear and Show Commands
Command
Purpose
clear ip bgp address
Reset a particular BGP connection.
clear ip bgp *
Reset all BGP connections.
clear ip bgp peer-group tag
Remove all members of a BGP peer group.
show ip bgp prefix
Display peer groups and peers not in peer groups to which the
prefix has been advertised. Also display prefix attributes such as
the next hop and the local prefix.
prefix has been advertised. Also display prefix attributes such as
the next hop and the local prefix.