With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swUnitMgmtSerialNumber
Switch Unit Mgmt Serial Number
1.3.6.1.4.1.171.12.11.1.9.4.1.17
A text string containing the serial number of the stacking unit.
Back to EQUIPMENT-MIB MIB page.
IPHost Network monitor allows you to monitor swUnitMgmtSerialNumber 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.
