With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csqModuleTrafficClassChangedPackets
Cisco Switch QOS Module Traffic Class Changed Packets
1.3.6.1.4.1.9.9.580.1.5.3.1.46
The number of packets that have the Traffic Class changed due to policing
Back to CISCO-SWITCH-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor csqModuleTrafficClassChangedPackets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.