With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swMldSnoopingGroupInfoEntry
Switch Mld Snooping Group Info Entry
1.3.6.1.4.1.171.12.34.3.3.1
Information about current Mld information which captured by this device, provided that swMldSnoopingGlobalState and swMldSnoopingCtrlState of associated VLAN entry are all enabled.
Back to MLD-SNOOPING-MIB MIB page.
IPHost Network monitor allows you to monitor swMldSnoopingGroupInfoEntry 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.