With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2TrafficSegForwardPorts
Switch L2 Traffic Seg Forward Ports
1.3.6.1.4.1.171.11.70.5.2.14.1.1.2
The port list that the specific port can forward traffic.
Back to DES6500-SWL2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2TrafficSegForwardPorts 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.