Dell Force10 S4820T S4820T Configuration Guide - Page 228

www.dell.com | support.dell.com Step Command Syntax 5 neighbor {ip-address | peer-group-name} distribute-list prefix-list-name {in | out} Command Mode CONFIG-ROUTERBGP Purpose Filter routes based on the ccriteria in the configured prefix list. Configure the following parameters: • ip-address or peer-group-name: enter the neighbor's IP address or the peer group's name. • prefix-list-name: enter the name of a configured prefix list. • in: apply the prefix list to inbound routes. • out: apply the prefix list to outbound routes. As a reminder, below are some rules concerning prefix lists: • If the prefix list contains no filters, all routes are permitted. • If none of the routes match any of the filters in the prefix list, the route is denied. This action is called an implicit deny. (If you want to forward all routes that do not match the prefix list criteria, you must configure a prefix list filter to permit all routes. For example, you could have the following filter as the last filter in your prefix list permit 0.0.0.0/0 le 32). • Once a route matches a filter, the filter's action is applied. No additional filters are applied to the route. To view the BGP configuration, use the show config command in the ROUTER BGP mode. To view a prefix list configuration, use the show ip prefix-list detail or show ip prefix-list summary commands in EXEC Privilege mode. Use these commands in the following sequence, starting in the CONFIGURATION mode to filter routes using a route map. Step 1 2 Command Syntax route-map map-name [permit | deny] [sequence-number] {match | set} Command Mode CONFIGURATION CONFIG-ROUTE-MAP 3 exit 4 router bgp as-number CONFIG-ROUTE-MAP CONFIGURATION Purpose Create a route map and assign it a name. Create multiple route map filters with a match or set action. Refer to Access Control Lists (ACLs) for information on configuring route maps. Return to the CONFIGURATION mode. Enter ROUTER BGP mode. 228 | Border Gateway Protocol IPv4 (BGPv4)