From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Mon Jun 21 2004 - 09:52:37 GMT-3
Doug,
If you trust CoS, then DSCP will be set or reset based on the CoS-DSCP map.
Use the pass-through dscp when you want the dscp to be unaffected by the
map.
Same with with pass through cos, use it when you want to trust dscp, but
you want to preserve the original CoS, regardless of the dscp-cos map.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "Calton, Doug" <Doug.Calton@getronics.com>
To: <ccielab@groupstudy.com>
Sent: Monday, June 21, 2004 8:44 AM
Subject: Stupid MLS QOS question
> This is really silly, but does anyone know what the difference between
> the interface commands "mls qos trust cos pass-through dscp" and "mls
> qos trust cos pass-through cos" might be? One says you "trust" cos and
> don't change dscp, and the other "trusts" dscp and doesn't change cos.
> Sounds like the end result is the same to me, or does this have to do
> with use of defaults when the incoming packet simply doesn't HAVE a
> value?
>
> Doug Calton
> Program Manager
> AN/TSP
> Tel: 513-774-8333
> FAX: 978-625-1026
> Mobile: 513-253-8484
> doug.calton@getronics.com
> www.getronics.com/us
>
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