Re: 3560 : Doubt for QOS

Hi,

First of all in this configuration you are trusting the cos of the incoming
packets entering fa0/0. As you know, there are internal tables which can be
seen by show mls qos map (COS--DSCP--IP Precedence). When you decide to put
the no mls qos rewrite ip dscp you are stopping the switch from going
through the mapping table to choose the mapped dscp value to that cos and
instead taking the dscp value in the packet unchanged!

regards,

On Sun, Jun 28, 2009 at 11:11 AM, Pradeep Malik <pradeepmlk_at_gmail.com>wrote:

> 3560 :Doubt for QOS
>
>
> Let's say if following is config :
>
> mls qos
>
> int f0/0
> mls qos trust cos
> no mls qos rewrite ip dscp
> ......
> end
>
>
>
> My question is that will switch change the dscp of the incoming packets
> depending on COS-DSCP map ??
>
>
> Any suggestions are welcome.
>
> Tks !
>
>
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-- 
KJ
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