Cisco C4506 - How to view DSCP or COS values

barrydryburgh · ‎08-26-2010

I am trying to see if there is any way to view the DSCP or COS values incoming or outgoing through a physical port or vlan interface. I am able to see matches if I create a policy-map. Any one have any other ideas?

Chad Peterson · ‎08-26-2010

You can get a good idea by doing :

'show platform software int '

It will show you something like this:

show platform software interface 
Switch Phyport Gi1/1 Non-Zero Software Statistics
  TxBytesTxQ1               : 1192020   
  TxBytesTxQ3               : 11421      
  RxIslTaggedPackets        : 3002
  RxBcastAndOrMcastBytes    : 8589934592

Then you can check which DSCP values go to which TX queue:

show qos map dscp to tx-queue.

I also believe it will show you Rx and Tx packets with their CoS values as well if L2. I don't have a 4500 on me at the moment, but will update this when i get one to confirm