With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swQosDscpTrustPortCtrlEntry
Switch Qos Dscp Trust Port Control Entry
1.3.6.1.4.1.171.12.61.3.7.1.1
A list that contains the DSCP trusted state per port.
Back to QoS-MIB MIB page.
IPHost Network monitor allows you to monitor swQosDscpTrustPortCtrlEntry 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.