Dell PowerConnect B-RX BigIron RX Series Configuration Guide v02.8.00 - Page 890

26 Filtering BigIron RX(config-routemap DAMPENING_MAP_NEIGHBOR_A)# exit BigIron RX(config)# router bgp BigIron RX(config-bgp)# dampening route-map DAMPENING_MAP_ENABLE BigIron RX(config-bgp)# neighbor 10.10.10.1 route-map in DAMPENING_MAP_NEIGHBOR_A In this example, the first command globally enables route flap dampening. This route map does not contain any match or set statements. At the BGP configuration level, the dampening route-map command refers to the DAMPENING_MAP_ENABLE route map created by the first command, thus enabling dampening globally. The third and fourth commands configure a second route map that explicitly enables dampening. Notice that the route map does not contain a match statement. The route map implicitly applies to all routes. Since the route map will be applied to a neighbor at the BGP configuration level, the route map will apply to all routes associated with the neighbor. Although the second route map enables dampening, the first route map is still required. The second route map enables dampening for the neighbors to which the route map is applied. However, unless dampening is already enabled globally by the first route map, the second route map has no effect. The last two commands apply the route maps. The dampening route-map command applies the first route map, which enables dampening globally. The neighbor command applies the second route map to neighbor 10.10.10.1. Since the second route map does not contain match statements for specific routes, the route map enables dampening for all routes received from the neighbor. Removing route dampening from a route You can un-suppress routes by removing route flap dampening from the routes. The BigIron RX allows you to un-suppress all routes at once or un-suppress individual routes. To un-suppress all the suppressed routes, enter the following command at the Privileged EXEC level of the CLI. BigIron RX# clear ip bgp damping Syntax: clear ip bgp damping [ ] The parameter specifies a particular network. The parameter specifies the network's mask. To un-suppress a specific route, enter a command such as the following. BigIron RX# clear ip bgp damping 209.157.22.0 255.255.255.0 This command un-suppresses only the routes for network 209.157.22.0/24. Displaying and clearing route flap dampening statistics The software provides many options for displaying and clearing route flap statistics. 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. 814 BigIron RX Series Configuration Guide 53-1002253-01