With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2IGMPForwardingTable
Switch L2 IGMP Forwarding Table
1.3.6.1.4.1.171.11.70.5.2.11.8
The table containing current IGMP forwarding information which captured by this device, provided that swL2DevCtrlIGMPSnooping and swL2IGMPCtrlState of associated VLAN entry are all enabled. Note that the priority of IGMP table entries is lower than Filtering Table, i.e. if there is a table hash collision between the entries of IGMP Table and Filtering Table inside the switch H/W address table, then Filtering Table entry overwrite the colliding entry of IGMP Table. See swL2FilterMgmt description also.
Back to DGS3627-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2IGMPForwardingTable 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.