With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
dvmrpAltNetTable
dvmrp Alt Net Table
1.3.6.1.3.62.1.1.8
The (conceptual) table listing the router's alternate subnets on physical interfaces for use in constructing the routing tables.
Back to DVMRP-MIB MIB page.
IPHost Network monitor allows you to monitor dvmrpAltNetTable 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 IP cameras right now.