With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2IGMPForwardingGroupAddr
Switch L2 IGMP Forwarding Group Address
1.3.6.1.4.1.171.11.70.5.2.11.8.1.3
This object is identify group ip address.
Back to DGS3627-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2IGMPForwardingGroupAddr 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 WiFi routers right now.