Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 602

www.dell.com | support.dell.com State: Established Up/Down Time: 00:15:20 Timers: KeepAlive 30 sec, Hold time 75 sec SourceActive packet count (in/out): 8/0 SAs learned from this peer: 1 SA Filtering: Input (S,G) filter: none Output (S,G) filter: none Multicast sources in remote domains are stored on the RP in the Source-active cache (SA cache). The system does not create entries in the multicast routing table until there is a local receiver for the corresponding multicast group. Manage the Source-active Cache Each SA-originating RP caches the sources inside its domain (domain-local), and the sources which it has learned from its peers (domain-remote). By caching sources: • domain-local receivers experience a lower join latency, • RPs can transmit SA messages periodically to prevent SA storms, and • only sources that are in the cache are advertised in the SA to prevent transmitting multiple copies of the same source information. View the Source-active Cache Task View the SA cache. Command Syntax show ip msdp sa-cache Command Mode EXEC Privilege R3_E600#show ip msdp sa-cache MSDP Source-Active Cache - 1 entries GroupAddr SourceAddr RPAddr 239.0.0.1 10.11.4.2 192.168.0.1 LearnedFrom Expire UpTime 192.168.0.1 76 00:10:44 Limit the Source-active Cache Set the upper limit of the number of active sources that FTOS caches. The default active source limit is 500K messages. When the total number of active sources reaches the specified limit, subsequent active sources are dropped even if they pass the RPF and policy check. Task Limit the number of sources that can be stored in the SA cache. Command Syntax show ip msdp sa-limit Command Mode EXEC Privilege If the total number of active sources is already larger than the limit when limiting is applied, the sources that are already in FTOS are not discarded. To enforce the limit in such a situation, use the command clear ip msdp sa-cache to clear all existing entries. 602 | Multicast Source Discovery Protocol