Dell Force10 S4820T S4820T Configuration Guide - Page 234

www.dell.com | support.dell.com Command Syntax set dampening half-life reuse suppress max-suppress-time Command Mode CONFIG-ROUTE-MAP Purpose Enter the following optional parameters to configure route dampening parameters: • half-life range: 1 to 45. Number of minutes after which the Penalty is decreased. After the router assigns a Penalty of 1024 to a route, the Penalty is decreased by half after the half-life period expires. (Default: 15 minutes) • reuse range: 1 to 20000. This number is compared to the flapping route's Penalty value. If the Penalty value is less than the reuse value, the flapping route is once again advertised (or no longer suppressed). (Default: 750) • suppress range: 1 to 20000. This number is compared to the flapping route's Penalty value. If the Penalty value is greater than the suppress value, the flapping route is no longer advertised (that is, it is suppressed). (Default: 2000.) • max-suppress-time range: 1 to 255. The maximum number of minutes a route can be suppressed. The default is four times the half-life value. (Default: 60 minutes.) To view a count of dampened routes, history routes and penalized routes when route dampening is enabled, look at the seventh line of the show ip bgp summary command output as shown in the following example. FTOS>show ip bgp summary BGP router identifier 10.114.8.131, local AS number 65515 BGP table version is 855562, main routing table version 780266 122836 network entrie(s) and 221664 paths using 29697640 bytes of memory 34298 BGP path attribute entrie(s) using 1920688 bytes of memory 29577 BGP AS-PATH entrie(s) using 1384403 bytes of memory 184 BGP community entrie(s) using 7616 bytes of memory Dampening enabled. 0 history paths, 0 dampened paths, 0 penalized paths Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.114.8.34 10.114.8.33 FTOS> 18508 82883 79977 780266 0 18508 117265 25069 780266 0 2 00:38:51 20 00:38:50 118904 102759 To view which routes are dampened (non-active), use the show ip bgp dampened-routes command in EXEC Privilege mode. Use the following command in EXEC Privilege mode to clear information on route dampening and return suppressed routes to active state. Command Syntax clear ip bgp dampening [ip-address mask] Command Mode Purpose EXEC Privilege Clear all information or only information on a specific route. 234 | Border Gateway Protocol IPv4 (BGPv4)