Applying a CoS Mutation map to a SLX 9740 or Extreme 8820

Note

This feature is supported only on SLX 9740 and Extreme 8820.

The CoS Mutation map that needs to be applied to a SLX 9740 or Extreme 8820 must exist. If not, create the CoS Mutation map first. CoS Mutation Map can only be applied to the Egress side.

To apply a CoS Mutation map to a physical interface:

Navigate to the Global Configuration Mode.
```
SLX# configure terminal
SLX (config)# 
```
Navigate into the interface context.
```
SLX (config)# interface Ethernet 0/3
SLX (conf-if-eth-0/3)# 
```
Note
CoS Mutation map can only be applied to SLX 9740 or Extreme 8820 and only to their physical and port-channel interfaces.
Apply the CoS Mutation map to the interface.
```
SLX (conf-if-eth-0/3)# qos cos-mutation test-cos-mut-map-1
SLX (conf-if-eth-0/3)# 
```
The selected CoS Mutation map is applied to the interface.
Optional: You can also apply the all-zero-map which is a special map that maps all incoming CoS values to zero (0) when applying to outgoing packets.
```
SLX (conf-if-eth-0/3)# qos cos-mutation all-zero-map
SLX (conf-if-eth-0/3)# 
```
Exit out of the interface configuration mode
```
SLX (conf-if-eth-0/3)# exit
SLX (config)# 
```
Exit out of the Global Configuration Mode.
```
SLX (config)# exit
SLX# 
```

The following is the consolidation of the above steps.

SLX# configure terminal
SLX (config)# interface Ethernet 0/3
SLX (conf-if-eth-0/3)# qos map test-cos-mut-map-1
SLX (conf-if-eth-0/3)# exit
SLX (config)# exit
SLX#