With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
msdpPeerInMessageElapsedTime
msdp Peer In Message Elapsed Time
1.3.6.1.3.92.1.1.5.1.17
Elapsed time in seconds since the last MSDP message was received from the peer. Each time msdpPeerInControlMessages is incremented, the value of this object is set to zero (0).
Back to DRAFT-MSDP-MIB MIB page.
IPHost Network monitor allows you to monitor msdpPeerInMessageElapsedTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.