With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
stpxMSTPortEntry
stpx MST Port Entry
1.3.6.1.4.1.9.9.82.1.11.11.1
An entry with port information for the MST Protocol on a bridge port.
Back to CISCO-STP-EXTENSIONS-MIB MIB page.
IPHost Network monitor allows you to monitor stpxMSTPortEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.