With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swMldSnoopingMcstRTOnly
Switch Mld Snooping Mcst RT Only
1.3.6.1.4.1.171.12.34.1.2
Specifies that the switch should forward all multicast traffic to a multicast-enabled IPv6 router only.
Back to MLD-SNOOPING-MIB MIB page.
IPHost Network monitor allows you to monitor swMldSnoopingMcstRTOnly 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 access points right now.