With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swPimStaticRPAddress
Switch Pim Static RP Address
1.3.6.1.4.1.171.12.52.3.6.1.3
The (unicast) address of the interface which will be advertised as a static RP.
Back to PIM-SM-MIB MIB page.
IPHost Network monitor allows you to monitor swPimStaticRPAddress 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.