With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
qosDstMacCos
qos Dst Mac Cos
1.3.6.1.4.1.9.18.2.1.6.1.1.4
The CoS to assign the packet with the associated MAC/VLAN tuple. Note that this CoS is overridden by the policies to classify the frame at layer 3 if there are any.
Back to CISCO-QOS-PIB-MIB MIB page.
IPHost Network monitor allows you to monitor qosDstMacCos 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.