With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDscpTrustPortCtrlState
Switch Dscp Trust Port Control State
1.3.6.1.4.1.171.12.51.3.3.1.2
This object is used to enable/disable the DSCP trust state on a selected port.
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IPHost Network monitor allows you to monitor swDscpTrustPortCtrlState 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 WiFi routers right now.