Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 645
Limiting the Source-Active Messages from a Peer, Preventing MSDP from Caching a Local Source
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Dell(conf)#ip access-list standard fifty Dell(conf)#seq 5 permit host 200.0.0.50 Dell#ip msdp sa-cache MSDP Source-Active Cache - 3 entries GroupAddr SourceAddr RPAddr LearnedFrom 229.0.50.2 24.0.50.2 200.0.0.50 10.0.50.2 229.0.50.3 24.0.50.3 200.0.0.50 10.0.50.2 229.0.50.4 24.0.50.4 200.0.0.50 10.0.50.2 Expire 73 73 73 UpTime 00:13:49 00:13:49 00:13:49 Dell#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 Multicast Source Discovery Protocol (MSDP) 645
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