With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
msdpNumSACacheEntries
msdp Num SA Cache Entries
1.3.6.1.3.92.1.1.3
The total number of entries in the SA Cache table.
Back to DRAFT-MSDP-MIB MIB page.
IPHost Network monitor allows you to monitor msdpNumSACacheEntries on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.