With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
qosIfRedEntry
qos If Red Entry
1.3.6.1.4.1.9.18.2.1.8.4.1
An instance of this class specifies threshold limits for a particular RED threshold of a given threshold set on an interface and with a particular role combination.
Back to CISCO-QOS-PIB-MIB MIB page.
IPHost Network monitor allows you to monitor qosIfRedEntry 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.