With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanStatsInUcastClassBEirOctets
rpr Span Stats In Ucast Class B Eir Octets
1.0.8802.17.1.1.1.3.4.1.8
The number of received (PHY to MAC) classB EIR unicast octets.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanStatsInUcastClassBEirOctets 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.