With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprClientIntervalInUcastClassBEirFrames
rpr Client Interval In Ucast Class B Eir Frames
1.0.8802.17.1.1.1.4.2.1.9
The number of MAC to client classB EIR unicast frames in a particular interval in the past 24 hours.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprClientIntervalInUcastClassBEirFrames on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.