Hi All,

  I was reading Joe's post on 3560 QoS and a question or two popped up. When it 
comes to select an output queue, is it correctly understood, that you depending 
on whether you used the trust CoS or trust DSCP, either the use the output 
cos-map or dscp-map respectively?

  Also, in all cases, i assume that both a CoS (if applicable) and a DSCP 
value, is generated from the QoS "label", which to me, seems to always be a 
DSCP value?

  Trust CoS ingress: Look up in the CoS-To-DSCP map and generate the output 
DSCP value from this, leave the CoS value untouched, base output-queue 
assignment based on the cos-map.

  Trust DSCP ingress: Look up in the DSCP-DSCP mutation map and see if anything 
needs changing, look up in the DSCP-to-CoS, to generate a CoS value, and base 
the output queue on the DSCP value.

Is this correct?

Maybe, if incorect, you guys can sketch out a few examples on the flow from 
ingress to egress.

Thanks in advance!

Sincerely,
Kim Pedersen

// Freedom Matters
Follow my CCIE progress on: http://kpjungle.wordpress.com

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