With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bcpConfigSpanTree
Cisco Bridge Control Protocol Config Span Tree
1.3.6.1.4.1.9.9.275.1.2.1.11
The desired spanning tree protocol of the local BCP entity. The listing values of the Spanning- Tree Protocol are specified in the most recent RFC1700. This value is meaningful only when the local BCP entity has negotiated the Spanning-Tree-Protocol configuration option, which means the value of bcpConfigSpanTreeControl is enabled(1).
Back to CISCO-BCP-MIB MIB page.
IPHost Network monitor allows you to monitor bcpConfigSpanTree on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.