With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swQinQRuleTable
Switch Qin Q Rule Table
1.3.6.1.4.1.171.12.57.4.2
This table contains Q-in-Q rule information. These rules will indicate whether to add a tag for the SP-VLAN or to replace the inner C-VLAN in the tag by the SP-VLAN. If the matched packet has a SP-VLAN tag and the action is 'add', this rule will not take effect for the packet. If the matched packet has no C-VLAN tag and the action is 'replace', this rule will not take effect too. C-VLAN based Q-in-Q rules have lower priority than flow-based Q-in-Q rules. For flow-based Q-in-Q rules in the same profile, the rule's priority is decided by the rule's ID; a smaller ID has a higher priority.
Back to Q-IN-Q-MIB MIB page.
IPHost Network monitor allows you to monitor swQinQRuleTable 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 routers right now.