With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
etherHistoryHighCapacityOctets
ether History High Capacity Octets
1.3.6.1.2.1.16.2.6.1.4
The total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including FCS octets) during this sampling interval.
Back to HC-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor etherHistoryHighCapacityOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.