Configure an MPLS QoS Traffic Class-to-EXP Mutation Map

This configuration is not supported on SLX 9150/Extreme 8520 devices.

Enter global configuration mode.
```
device# configure terminal
```
Create and name an MPLS QoS traffic class-to-EXP mutation map.
```
device(config)# qos-mpls map traffic-class-exp tcExpMap
```

Define the traffic class-to-EXP values.

device(traffic-class-exp-tcExpMap)# traffic-class 0 drop-precedence 0 to exp 7 
device(traffic-class-exp-tcExpMap)# traffic-class 1 drop-precedence 0 to exp 6
device(traffic-class-exp-tcExpMap)# traffic-class 4 drop-precedence 0 to exp 3
device(traffic-class-exp-tcExpMap)# traffic-class 5 drop-precedence 0 to exp 2
device(traffic-class-exp-tcExpMap)# traffic-class 6 drop-precedence 0 to exp 2
device(traffic-class-exp-tcExpMap)# traffic-class 7 drop-precedence 0 to exp 1
device(traffic-class-exp-tcExpMap)# end

Return to privileged exec mode.

device(traffic-class-exp-tcExpMap)# end

Verify the configuration.

device#  show qos-mpls maps traffic-class-exp

traffic-class-cos map    'TcExpMap' (Drop-Precedence = dp)
 dp: traffic-class  :  0  1  2  3  4  5  6  7
 ------------------- ------------------------
 0: exp             :  7  6  2  3  3  2  2  1
 1:                 :  0  1  2  3  4  5  6  7
 2:                 :  0  1  2  3  4  5  6  7
 3:                 :  0  1  2  3  4  5  6  7

Enabled on the following slots :

Save the running-config file to the startup-config file.
```
device# copy running-config startup-config
```

This example summarizes the commands in this procedure.

device# configure terminal
device(config)# qos-mpls map traffic-class-exp tcExpMap
device(traffic-class-exp-tcExpMap)# traffic-class 0 drop-precedence 0 to exp 7 
device(traffic-class-exp-tcExpMap)# traffic-class 1 drop-precedence 0 to exp 6
device(traffic-class-exp-tcExpMap)# traffic-class 4 drop-precedence 0 to exp 3
device(traffic-class-exp-tcExpMap)# traffic-class 5 drop-precedence 0 to exp 2
device(traffic-class-exp-tcExpMap)# traffic-class 6 drop-precedence 0 to exp 2
device(traffic-class-exp-tcExpMap)# traffic-class 7 drop-precedence 0 to exp 1
device(traffic-class-exp-tcExpMap)# end
device# show qos-mpls maps traffic-class-exp
device# copy running-config startup-config