Applying a traffic class-to-CoS mutation map to an egress interface

A QoS traffic class-to-CoS mutation map has been configured.

Enter global configuration mode.
```
 device# configure terminal 
```

Enter interface configuration mode.

 device(config)# interface ethernet 2/2

Apply the configured QoS traffic class-to-CoS map to the interface.
```
 device(conf-if-eth-2/2)# qos traffic-class-cos tcCoSMap  
```
Return to privileged exec mode.
```
 device(conf-if-eth-2/2)# end 
```

Verify the configuration.

device# show qos maps traffic-class-cos tcCoSMap

  [Note: CoS = Class of Service, TC = Traffic Class, DP = Drop Precedence]
  TC-to-CoS Map: tcCoSMap
              In-TC: 0  1  2  3  4  5  6  7
      -------------------------------------
      Out-CoS(DP=0): 0  1  2  3  4  2  6  7
      Out-CoS(DP=1): 0  1  2  3  4  5  6  7
      Out-CoS(DP=2): 0  1  1  3  4  2  6  7
      Out-CoS(DP=3): 0  1  2  3  4  5  6  7

      Enabled on the following interfaces: 
      Eth 2/2

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

Apply a QoS traffic class-to-CoS mutation map to an egress interface configuration example

 device# configure terminal
device(config)# interface ethernet 2/2
device(conf-if-eth-2/2)# qos traffic-class-cos tcCoSMap  
device(conf-if-eth-2/2)# end
device# show qos maps traffic-class-cos tcCoSMap 
device# copy running-config startup-config