With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
qosIfTailDropThresholdSetValue
qos If Tail Drop Threshold Set Value
1.3.6.1.4.1.9.18.2.1.8.5.1.5
The threshold value above which packets are dropped.
Back to CISCO-QOS-PIB-MIB MIB page.
IPHost Network monitor allows you to monitor qosIfTailDropThresholdSetValue 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.