With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swQinQPortEntry
Switch Qin Q Port Entry
1.3.6.1.4.1.171.12.57.3.1.1
A list of Q-in-Q VLAN mode information for each port.
Back to Q-IN-Q-MIB MIB page.
IPHost Network monitor allows you to monitor swQinQPortEntry 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.
