S5#sh run | b mls qos
mls qos map dscp-mutation Prob9 14 to 12
mls qos map dscp-mutation Prob9 28 to 26
mls qos
!
interface FastEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 mls qos trust dscp
 mls qos dscp-mutation Prob9
!