Dell(conf)#ip access-list standard fiftyDell(conf)#seq 5 permit host 200.0.0.50Dell#ip msdp sa-cacheMSDP Source-Active Cache - 3 entriesGroupAddr SourceAddr RPAddr LearnedFrom Expire UpTime229.0.50.2 24.0.50.2 200.0.0.50 10.0.50.2 73 00:13:49229.0.50.3 24.0.50.3 200.0.0.50 10.0.50.2 73 00:13:49229.0.50.4 24.0.50.4 200.0.0.50 10.0.50.2 73 00:13:49Dell#ip msdp sa-cache rejected-saMSDP Rejected SA Cache3 rejected SAs received, cache-size 32766UpTime GroupAddr SourceAddr RPAddr LearnedFrom Reason00:33:18 229.0.50.64 24.0.50.64 200.0.1.50 10.0.50.2 Rpf-Fail00:33:18 229.0.50.65 24.0.50.65 200.0.1.50 10.0.50.2 Rpf-Fail00:33:18 229.0.50.66 24.0.50.66 200.0.1.50 10.0.50.2 Rpf-FailLimiting the Source-Active Messages from a PeerTo limit the source-active messages from a peer, use the following commands.1. OPTIONAL: Store sources that are received after the limit is reached in the rejected SA cache.CONFIGURATION modeip msdp cache-rejected-sa2. Set the upper limit for the number of sources allowed from an MSDP peer.CONFIGURATION modeip msdp peer peer-address sa-limitThe default limit is 100K.If the total number of sources received from the peer is already larger than the limit when thisconfiguration is applied, those sources are not discarded. To enforce the limit in such a situation, firstclear the SA cache.Preventing MSDP from Caching a Local SourceYou can prevent MSDP from caching an active source based on source and/or group. Because thesource is not cached, it is not advertised to remote RPs.1. OPTIONAL: Cache sources that are denied by the redistribute list in the rejected SA cache.CONFIGURATION modeip msdp cache-rejected-sa2. Prevent the system from caching local SA entries based on source and group using an extended ACL.CONFIGURATION modeip msdp redistribute list566 Multicast Source Discovery Protocol (MSDP)
