With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swMSTPInstType
Switch MSTP Inst Type
1.3.6.1.4.1.171.12.15.2.3.1.10
This object indicates the type of instance.
Back to MSTP-MIB MIB page.
IPHost Network monitor allows you to monitor swMSTPInstType 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 switches right now.