With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csqDscpMutationTable
Cisco Switch QOS Dscp Mutation Table
1.3.6.1.4.1.9.9.580.1.3.5
This table indicates DSCP mutation maps in the device.
Back to CISCO-SWITCH-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor csqDscpMutationTable 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.