With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2TrunkCtrlEntry
Switch L2 Trunk Control Entry
1.3.6.1.4.1.171.11.70.5.2.9.3.1
A list of information that specifies which ports group a set of ports(up to 8) into a single logical link.
Back to DGS3200-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2TrunkCtrlEntry 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.