Configure a DSCP-to-CoS Mutation Map

Use the DSCP value of ingress packets to remap the egress 802.1p CoS priority values.

1. Enter global configuration mode.
   

   device# configure terminal
   

2. Create a named QoS DSCP-to-CoS mutation map.
   

   device(config)# qos map dscp-cos dscpCosMap 
   

   This step also places the system in dscp-cos map mode so that you can map DSCP values to CoS values.
3. Map ingress DSCP values to egress CoS values.
   

   device(dscp-cos-dscpCosMap)# map dscp 23 to cos 4
   

   In this example, the DSCP value 23 is mapped to CoS priority 4.
   

   device(dscp-cos-dscpCosMap)# map dscp 43 to cos 5
   

   In this example, DSCP value 43 is mapped to CoS priority 5.
4. Return to privileged EXEC mode.
   

   device(dscp-cos-dscpCosMap)# end
   

5. Verify the configuration.
   

   device#  show qos maps dscp-cos 
   
   Dscp-to-CoS map 'dscpCosMap' (dscp= d1d2)
   d1 :  d2 0  1  2  3  4  5  6  7  8  9
   -------------------------------------
   0 :     00 00 00 00 00 00 00 00 01 01
   1 :     01 01 01 01 01 01 02 02 02 02
   2 :     02 02 02 04 03 03 03 03 03 03
   3 :     03 03 04 04 04 04 04 04 04 04
   4 :     05 05 05 05 05 05 05 05 06 06
   5 :     06 06 06 06 06 06 07 07 07 07
   6 :     07 07 07 07
   
   Enabled on the following interfaces:
    Eth 1/3

6. Save the running-config file to the startup-config file
   

   device# copy running-config startup-config