Dell Force10 S4820T S4820T Configuration Guide - Page 639

• 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 Figure 30-9. Displaying the MSDP Source-active Cache 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. Clear the Source-active Cache Task Clear the SA cache of all, local, or rejected entries, or entries for a specific group. Command Syntax Command Mode clear ip msdp sa-cache [group-address CONFIGURATION | local | rejected-sa] Enable the Rejected Source-active Cache Active sources can be rejected because • the RPF check failed, • the SA limit is reached, Multicast Source Discovery Protocol (MSDP) | 639