GroupAddr 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 this configuration is applied, those sources arenot discarded. To enforce the limit in such a situation, first clear 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 the source is not cached, it is notadvertised 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 listExample of Verifying the System is not Caching Local SourcesWhen you apply this filter, the SA cache is not affected immediately. When sources that are denied by the ACL time out, they are notrefreshed. Until they time out, they continue to reside in the cache. To apply the redistribute filter to entries already present in the SAcache, first clear the SA cache. You may optionally store denied sources in the rejected SA cache.R1(conf)#do show run msdp!ip multicast-msdpip msdp peer 192.168.0.3 connect-source Loopback 0ip msdp redistribute list mylocalfilterip msdp cache-rejected-sa 1000R1_E600(conf)#do show run acl!ip access-list extended mylocalfilterseq 5 deny ip host 239.0.0.1 host 10.11.4.2seq 10 deny ip any any528 Multicast Source Discovery Protocol (MSDP)
