With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanCurrentOutMcastClassBCirFrames
rpr Span Current Out Mcast Class B Cir Frames
1.0.8802.17.1.1.1.3.1.1.29
The number of transmitted (MAC to PHY) classB CIR multicast and broadcast frames in the current interval.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanCurrentOutMcastClassBCirFrames 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.