Caching Source-Active State If you want to sacrifice some memory in exchange for reducing the latency of the source information, you can configure the device to cache SA messages. Perform the following steps to enable the caching of source/group pairs: Follow these steps to enable the caching of source/group pairs: Procedure Configuring MSDP Caching Source-Active State Command or Action Purpose Step 7 show running-config Example: Device#show running-config Verifies your entries. Step 8 copy running-config startup-config Example: Device#copy running-config startup-config (Optional) Saves your entries in the configuration file. Command or Action Purpose Step 1 enable Example:
Device>enable Enables privileged EXEC mode. • Enter your password if prompted. Step 2 configure terminal Example: Device#configure terminal Enters global configuration mode. Step 3 ip msdp cache-sa-state [list access-list-number] Example: Device(config)#ip msdp cache-sa-state 100 Enables the caching of source/group pairs (create an SA state). Those pairs that pass the access list are cached. For list access-list-number, the range is 100 to 199. Note An alternative to this command is the ip msdp sa-reques global configuration command, which causes the device to send an SA request Configuring MSDP 6