With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pimCandidateRPRowStatus
pim Candidate RP Row Status
1.3.6.1.3.61.1.1.11.1.4
The status of this row, by which new entries may be created, or old entries deleted from this table.
Back to PIM-MIB MIB page.
IPHost Network monitor allows you to monitor pimCandidateRPRowStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.