With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
tokenRingMLStatsBeaconTime
token Ring ML Stats Beacon Time
1.3.6.1.2.1.16.1.2.1.9
The total amount of time that the ring has been in the beaconing state.
Back to TOKEN-RING-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor tokenRingMLStatsBeaconTime 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.