With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDlinkEquipmentFan4Status
Switch Dlink Equipment Fan4 Status
1.3.6.1.4.1.171.12.11.1.5.4
Indicates status of the fourth fan
Back to DLINK-EQUIPMENT-MIB MIB page.
IPHost Network monitor allows you to monitor swDlinkEquipmentFan4Status 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 access points right now.