With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csqCosToDscpCos
Cisco Switch QOS Cos To Dscp Cos
1.3.6.1.4.1.9.9.580.1.2.1.1.1
The CoS value being mapped to the DSCP value.
Back to CISCO-SWITCH-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor csqCosToDscpCos on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.