With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pimRPSetExpiryTime
pim RP Set Expiry Time
1.3.6.1.3.61.1.1.6.1.5
The minimum time remaining before the Candidate-RP will be declared down. If the local router is not the BSR, this value is 0.
Back to PIM-MIB MIB page.
IPHost Network monitor allows you to monitor pimRPSetExpiryTime 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.