With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csnUsageInterval
csn Usage Interval
1.3.6.1.4.1.9.9.737.1.1.3.1.1.3
This object specifies the interval in seconds over which the Netflow table usage (the value of csnUtilization) will be compared against the threshold specified by csnUsageThreshold.
Back to CISCO-SWITCH-NETFLOW-MIB MIB page.
IPHost Network monitor allows you to monitor csnUsageInterval 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.