With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnfPSBytes
cnf PS Bytes
1.3.6.1.4.1.9.9.387.1.5.3.1.4
Number of Bytes belonging to the same protocol and port, which were switched by netflow enabled interface(s). This counter contains the number of Packets switched by all netflow enabled line cards.
Back to CISCO-NETFLOW-MIB MIB page.
IPHost Network monitor allows you to monitor cnfPSBytes 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.