With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
caqPortStatsDropPkts
Cisco Access Control List QoS Port Statistics Dropped Packets
1.3.6.1.4.1.9.9.179.1.4.5.1.4
The number of packets have been received then dropped from the interface because they exceeded the threshold value configured at this queue and threshold of this interface.
Back to CISCO-CATOS-ACL-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor caqPortStatsDropPkts on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.