With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cbQosSetCfgMplsExpValue
Cisco Class Based Qos Set Configuration Mpls Exp Value
1.3.6.1.4.1.9.9.166.1.14.1.1.6
The MPLS experimental value at which the packet is being set by the packet marking feature.
Back to CISCO-CLASS-BASED-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor cbQosSetCfgMplsExpValue on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.