With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lineRxCellCount
line Rx Cell Count
1.3.6.1.4.1.9.10.26.1.4.2.1.2
Total cell count in the upstream direction (ATU-R->ATU-C) reported by the CO. The counter value does not include cells with uncorrectable HEC errors. This is a free running counter which rolls back to zero when the value exceeds 2^32.
Back to CISCO-C6200-MIB MIB page.
IPHost Network monitor allows you to monitor lineRxCellCount on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.