With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanIntervalOutUcastClassBEirOctets
rpr Span Interval Out Ucast Class B Eir Octets
1.0.8802.17.1.1.1.3.2.1.28
The number of transmitted (MAC to PHY) classB EIR unicast octets in a particular interval in the past 24 hours.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanIntervalOutUcastClassBEirOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.