Cisco C4506 - How to view DSCP or COS values

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Aug 26th, 2010
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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?

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Chad Peterson Thu, 08/26/2010 - 14:44
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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


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