With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
ringStationControlEntry
ring Station Control Entry
1.3.6.1.2.1.16.10.1.1
A list of parameters that set up the discovery of stations on a particular interface and the collection of statistics about these stations.
Back to TOKEN-RING-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor ringStationControlEntry 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.