With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
dvmrpNeighborTable
dvmrp Neighbor Table
1.3.6.1.3.62.1.1.4
The (conceptual) table listing the router's DVMRP neighbors, as discovered by receiving DVMRP messages.
Back to DVMRP-MIB MIB page.
IPHost Network monitor allows you to monitor dvmrpNeighborTable 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.