From: sumit.kumar@comcast.net
Date: Fri May 06 2005 - 03:00:21 GMT-3
Bobby,
Thanks for your inputs,
I was thinking of all possible methods of doing it that's where is I thought of COS-DSCP map,  you override the COS value on interfaces with let's say 5 (mls cos 5)and then map COS5 to DSCP 46.
Sumit
-------------- Original message -------------- 
> answe ro question 2 Cisco switch, in particular 3550, do not support 'match 
> vlan' to be able to trust on a per VLAN on a given port. Instead, you could 
> use per-port, per-VLAN QoS policy. 
> 
> Answer to question 1, use the policy map with a class map that matches any 
> ip traffic and apply the policy map to the interface vlan 10, is there is an 
> SVI for vlan 10. Not sure what you meant by MLS QoS maybe you meant module 
> QoS which is the same as policy map. Why do you need to map the CoS to 
> DSCP? Unless you know exactly what CoS value is coming in from vlan 10 then 
> you can use the CoS-to-DSCP mapping but sounds a lot messier. Also, if 
> there is vlan 10 then those traffic belongs to a particular subnet, correct? 
> Then you can use that subnet to classify the traffic to beuse in your class 
> map for the policy map. Clear as mud? 
> 
> 
> 
> ----- Original Message ----- 
> From: 
> To: 
> Sent: Thursday, May 05, 2005 9:36 PM 
> Subject: DSCP MArking on 3550 
> 
> 
> > Simple question: 
> > 
> > Q - Mark all the packets from vlan 10 to dscp 46. 
> > 
> > Confusion - where to apply policy-map physical ports on switch or 
> interface Vlan. 10 or use MLS QOS and Map COS to DSCP?? 
> > 
> > 2 Anyone used - " match vlan " option in class-map ? 
> > 
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