With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swMSTPInstInternalRootCost
Switch MSTP Inst Internal Root Cost
1.3.6.1.4.1.171.12.15.2.3.1.16
For CIST, the internal path cost is the path cost to the CIST Regional Root; For MSTI, the internal path cost is the path cost to the MSTI Regional Root for this particular MSTI in this MST Region
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IPHost Network monitor allows you to monitor swMSTPInstInternalRootCost 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 IP cameras right now.