With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cportQosClassDropPkts
cport Qos Class Drop Packets
1.3.6.1.4.1.9.9.189.1.3.6.1.5
This object indicates the number of egress packets that have been dropped for this queue and threshold.
Back to CISCO-PORT-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor cportQosClassDropPkts 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.