With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
tokenRingPStatsDataOctets
token Ring P Stats Data Octets
1.3.6.1.2.1.16.1.3.1.4
The total number of octets of data in good frames received on the network (excluding framing bits but including FCS octets) in non-MAC packets.
Back to TOKEN-RING-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor tokenRingPStatsDataOctets 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.