With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swMSTPPortMigration
Switch MSTP Port Migration
1.3.6.1.4.1.171.12.15.2.4.1.6
When operating in MSTP mode or RSTP mode, writing TRUE(1) to this object forces this port to transmit MST BPDUs. Any other operation on this object has no effect and it always returns FALSE(2) when read.
Back to MSTP-MIB MIB page.
IPHost Network monitor allows you to monitor swMSTPPortMigration 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 VPN routers right now.