With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2LoopDetectPortState
Switch L2 Loop Detect Port State
1.3.6.1.4.1.171.11.70.5.2.18.2.1.1.2
This object indicates the loopback detection function state on the port.
Back to DES3010G-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2LoopDetectPortState 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 routers right now.