With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
ringStationLastNAUN
ring Station Last NAUN
1.3.6.1.2.1.16.10.2.1.3
The physical address of last known NAUN of this station.
Back to TOKEN-RING-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor ringStationLastNAUN 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 VPN routers right now.