With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swPoESystemStackingCtrlUnitId
Switch PoE System Stacking Control Unit Id
1.3.6.1.4.1.171.12.24.1.11.1.1
This object indicates the device's Unit ID. A unit ID of zero denotes a stand-alone device.
Back to PoE-MIB MIB page.
IPHost Network monitor allows you to monitor swPoESystemStackingCtrlUnitId 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 IP cameras right now.