With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2DevCtrlLedPOEState
Switch L2 Device Control Led POE State
1.3.6.1.4.1.171.11.70.5.2.1.2.16
When set enabled(1), the POE LED is lighten. When set disabled(2), the Link/ACT/Speed LED is lighten.
Back to DGS3612-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2DevCtrlLedPOEState 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 switches right now.