With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoIpMRouteLocalFlag
cisco Ip M Route Local Flag
1.3.6.1.4.1.9.10.2.1.1.2.1.15
Boolean, indicating whether local system is a member of a group on any interface.
Back to CISCO-IPMROUTE-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoIpMRouteLocalFlag 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.