Cisco 3560G 48TS Software Configuration Guide - Page 760

Configuring MSDP Chapter 33 Configuring MSDP Controlling Source Information that Your Switch Forwards By default, the switch forwards all SA messages it receives to all its MSDP peers. However, you can prevent outgoing messages from being forwarded to a peer by using a filter or by setting a time-to-live (TTL) value. These methods are described in the next sections. Using a Filter By creating a filter, you can perform one of these actions: • Filter all source/group pairs • Specify an IP extended access list to pass only certain source/group pairs • Filter based on match criteria in a route map Beginning in privileged EXEC mode, follow these steps to apply a filter. This procedure is optional. Step 1 Step 2 Command Purpose configure terminal Enter global configuration mode. ip msdp sa-filter out ip-address | name Filter all SA messages to the specified MSDP peer. or or ip msdp sa-filter out {ip-address | name} To the specified peer, pass only those SA messages that pass the IP list access-list-number extended access list. The range for the extended access-list-number is 100 to 199. If both the list and the route-map keywords are used, all conditions must be true to pass any (S,G) pair in outgoing SA messages. or ip msdp sa-filter out {ip-address | name} route-map map-tag or To the specified MSDP peer, pass only those SA messages that meet the match criteria in the route map map-tag. If all match criteria are true, a permit from the route map passes routes through the filter. A deny filters routes. 33-12 Catalyst 3560 Switch Software Configuration Guide 78-16156-01