812 BigIron RX Series Configuration Guide53-1001810-01Filtering26BigIron RX(config-routemap DAMPENING_MAP_NEIGHBOR_A)# exitBigIron RX(config)# router bgpBigIron RX(config-bgp)# dampening route-map DAMPENING_MAP_ENABLEBigIron RX(config-bgp)# neighbor 10.10.10.1 route-map in DAMPENING_MAP_NEIGHBOR_AIn this example, the first command globally enables route flap dampening. This route map doesnot contain any match or set statements. At the BGP configuration level, the dampening route-mapcommand refers to the DAMPENING_MAP_ENABLE route map created by the first command, thusenabling 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 toall routes. Since the route map will be applied to a neighbor at the BGP configuration level, theroute map will apply to all routes associated with the neighbor.Although the second route map enables dampening, the first route map is still required. Thesecond 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 routemap has no effect.The last two commands apply the route maps. The dampening route-map command applies thefirst route map, which enables dampening globally. The neighbor command applies the secondroute map to neighbor 10.10.10.1. Since the second route map does not contain matchstatements for specific routes, the route map enables dampening for all routes received from theneighbor.Removing route dampening from a routeYou can un-suppress routes by removing route flap dampening from the routes. The device allowsyou 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 levelof the CLI.BigIron RX# clear ip bgp dampingSyntax: 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 209.157.22.0 255.255.255.0This command un-suppresses only the routes for network 209.157.22.0/24.Displaying and clearing route flap dampening statisticsThe software provides many options for displaying and clearing route flap statistics.
