With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swPimCandidateRPHoldtime
Switch Pim Candidate RP Holdtime
1.3.6.1.4.1.171.12.52.3.2.1
Used to set the time CRP advertisements remain valid on the PIM-SM enabled network. If these advertisements, set here, aren't received by the BSR within this time period, the CRP will be removed from the list of candidates. 0 states to the BSR that this CRP should immediately be removed. Default: 150 seconds.
Back to PIM-SM-MIB MIB page.
IPHost Network monitor allows you to monitor swPimCandidateRPHoldtime on D-Link device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring D-Link VPN routers right now.