3Com Switch 8800 Configuration Guide Chapter 30 MSDP Configuration30-8qualified (S, G) entries in the multicast routing table when creating SA messages, that is,to control the (S,G) entries imported from the multicast routing table to the domain.Please perform the following configurations in MSDP view.Table 30-8 Filtering the multicast routing entries importedOperation CommandAdvertise only the (S, G) entries permitted bythe ACL import-source [ acl acl-number ]Remove the above configuration undo import-sourceBy default, only intra-domain sources are advertised in SA messages.If the import-source command without acl parameter is executed, no source isadvertised in SA messages.II. Filtering SA request messagesPlease perform the following configurations in MSDP view.Table 30-9 Filtering SA request messagesOperation CommandFilter all the SA request messages from aspecified MSDP peer peer peer-address sa-request-policyFilter the SA request messages of thegroups of a specified MSDP peerpermitted by the basic ACL frompeer peer-address sa-request-policyacl acl-numberRemove the configuration of filtering SArequest messagesundo peer peer-addresssa-request-policyBy default, only the routers which caches SA messages can repond to SA requestmessages. Routers receive all SA request messsages from its MSDP peers.Multicast group addresses are described in ACL. If no ACL is specified, all SA requestmessages sent by the corresponding MSDP peer will be ignored. If an ACL is specified,only SA request messages of the groups permitted by the ACL will be processed.30.2.9 Controlling the Source Information ForwardedControlling of source information also includes that of forwarding and receiving sourceinformation besides that of creating source information. The outbound filter or time tolive (TTL) threshold of SA messages can be used to control the SA message forwarding.By default, all SA messages are forwarded to other MSDP peers.
