Multicast Source Discovery Protocol (MSDP) | 575Figure 26-11. Accepting Source-active Messages withLimit the Source-active Messages from a PeerIf 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, first clearthe SA cache.Task Command Syntax Command ModeSpecify the forwarding-peer and originating-RP fromwhich all active sources are accepted without regard forthe the RPF check. If you do not specify an access list,the peer accepts all sources advertised by that peer. Allsources from RPs denied by the ACL are subjected tothe normal RPF check.ip msdp default-peer ip-address list CONFIGURATIONTask Command Syntax Command ModeOPTIONAL: Store sources that are received after thelimit is reached in the rejected SA cache.ip msdp cache-rejected-sa CONFIGURATIONSet the upper limit for the number of sources allowedfrom an MSDP peer. The default limit is 100K.ip msdp peer peer-address sa-limit CONFIGURATIONFTOS(conf)#ip msdp peer 10.0.50.2 connect-source Vlan 50FTOS(conf)#ip msdp default-peer 10.0.50.2 list fiftyFTOS(conf)#ip access-list standard fiftyFTOS(conf)#seq 5 permit host 200.0.0.50FTOS#sh 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 00:13:49FTOS#sh 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-Fail
