With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDevInfoSystemUpTime
Switch Device Info System Up Time
1.3.6.1.4.1.171.11.70.5.2.1.1.1
The value of sysUpTime at the time the switch entered its current operational state. If the current state was entered prior to the last re-initialization, then this object contains a zero value. This value is in units of seconds.
Back to DHS3224-MIB MIB page.
IPHost Network monitor allows you to monitor swDevInfoSystemUpTime 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.
