Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 574

GroupAddr 229.0.50.2 229.0.50.3 229.0.50.4 SourceAddr 24.0.50.2 24.0.50.3 24.0.50.4 RPAddr 200.0.0.50 200.0.0.50 200.0.0.50 LearnedFrom 10.0.50.2 10.0.50.2 10.0.50.2 Expire 73 73 73 UpTime 00:13:49 00:13:49 00:13:49 DellEMC#ip msdp sa-cache rejected-sa MSDP Rejected SA Cache 3 rejected SAs received, cache-size 32766 UpTime GroupAddr SourceAddr RPAddr 00:33:18 229.0.50.64 24.0.50.64 200.0.1.50 00:33:18 229.0.50.65 24.0.50.65 200.0.1.50 00:33:18 229.0.50.66 24.0.50.66 200.0.1.50 LearnedFrom 10.0.50.2 10.0.50.2 10.0.50.2 Reason Rpf-Fail Rpf-Fail Rpf-Fail Limiting the Source-Active Messages from a Peer To 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 mode ip msdp cache-rejected-sa 2 Set the upper limit for the number of sources allowed from an MSDP peer. CONFIGURATION mode ip msdp peer peer-address sa-limit The 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 are not discarded. To enforce the limit in such a situation, first clear the SA cache. Preventing MSDP from Caching a Local Source You can prevent MSDP from caching an active source based on source and/or group. Because the source 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 mode ip msdp cache-rejected-sa 2 Prevent the system from caching local SA entries based on source and group using an extended ACL. CONFIGURATION mode ip msdp redistribute list Example of Verifying the System is not Caching Local Sources When you apply this filter, the SA cache is not affected immediately. When sources that are denied by the ACL time out, they are not refreshed. Until they time out, they continue to reside in the cache. To apply the redistribute filter to entries already present in the SA cache, first clear the SA cache. You may optionally store denied sources in the rejected SA cache. R1(conf)#do show run msdp ! ip multicast-msdp ip msdp peer 192.168.0.3 connect-source Loopback 0 ip msdp redistribute list mylocalfilter ip msdp cache-rejected-sa 1000 R1_E600(conf)#do show run acl ! ip access-list extended mylocalfilter seq 5 deny ip host 239.0.0.1 host 10.11.4.2 seq 10 deny ip any any 574 Multicast Source Discovery Protocol (MSDP)