With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoIpMRouteSptFlag
cisco Ip M Route Spt Flag
1.3.6.1.4.1.9.10.2.1.1.2.1.18
Boolean, indicating whether data is being received on the SPT tree, ie the Shortest Path Tree.
Back to CISCO-IPMROUTE-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoIpMRouteSptFlag on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.