With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swEtherCableDiagPortType
Switch Ether Cable Diag Port Type
1.3.6.1.4.1.171.12.58.1.1.1.2
Indicates the supported port data rate classification.
Back to CABLE-DIAG-MIB MIB page.
IPHost Network monitor allows you to monitor swEtherCableDiagPortType 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.