3550 mls qos trust defaultness

From: James (james@towardex.com)
Date: Fri Jul 23 2004 - 18:34:14 GMT-3


Hi group,

Am I right to understand that:

 o 3550 by default with 'mls qos' turned off will not trust any DSCP/COS values
 o After turning on 'mls qos' global command, unless explitcly configured to
   trust dscp/cos values per interface, it still won't trust.

Is this correct or am I way off?

I'm trying to police a port on a 3550 in both in/out direction. Since IP ACL
only does ingress, and DSCP does both, I'll use DSCP code 0 to match in/out.
But so much for DSCP if the user on the policed port changes DSCP values and
switch trusts them :)

Thanks for the tip!
-J

-- 
James Jun                                            TowardEX Technologies, Inc.
Technical Lead                        Network Design, Consulting, IT Outsourcing
james@towardex.com                  Boston-based Colocation & Bandwidth Services
cell: 1(978)-394-2867           web: http://www.towardex.com , noc: www.twdx.net


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