Re: OT:QOS understanding

Dennis,

Can you post the output of the command sh mls qos map cos-dscp ?

Based on that you may have to tweak the default values to map the
default COS values to your preferred DSCP values.

Best Regards,
Tharak Abraham Luke

On Fri, Jun 17, 2011 at 2:04 AM, Dennis Worth <dennis.worth_at_gmail.com>wrote:

> Hi Group,
>
> I was working on an access-layer routed approach config, and trying to
> understand the marking of QOS TOS from the switchport level.
>
> I have an IP phone on a 3750X switch that then gets routed to a a core
> switch. What I am not seeing is a marking of the voice traffic from say
> vlan
> 20. I created an ACL on the routed interface at core switch to match IP
> PREC, DSCP values, but nothing seems to match. According to my config on
> the
> Voip phone it should be TOS = A0 or IP PPREC 5 or what I thought was EF.
>
> I am guessing that the TOS byte is just not being automatically mapped to
> DSCP, but not real sure.
>
> Thanks for any help guiding me through this.
>
> --
> Dennis Worth
>
> "Of all men's miseries the bitterest it this: to know so much and to have
> control over nothing."
> --Herodotus
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Jun 17 2011 - 15:26:51 ART