With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swQinQRuleClassifyDstMacAddr
Switch Qin Q Rule Classify Dst Mac Address
1.3.6.1.4.1.171.12.57.4.2.1.5
Specifies the destination MAC address.
Back to Q-IN-Q-MIB MIB page.
IPHost Network monitor allows you to monitor swQinQRuleClassifyDstMacAddr 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 access points right now.