RE: DSCP/COS

From: devecchio (devecchio.turner@sbcglobal.net)
Date: Mon May 08 2006 - 22:19:28 ART


6500 real life problem, I am going to go with dscp since the port-channel
has an ip.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Bob
Sinclair
Sent: Monday, May 08, 2006 4:30 PM
To: devecchio; ccielab@groupstudy.com
Subject: Re: DSCP/COS

devecchio,

Seems to me you could trust either, but DSCP makes more sense. Is this a
lab
problem or real life? 3550 or 6500? On 3550 all qos is physical port
level,
and ports in an L3 Po are still L2, and COULD be trunked/tagged.

Can you give more context?

Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net

  ----- Original Message -----
  From: devecchio
  To: 'devecchio' ; ccielab@groupstudy.com
  Sent: Monday, May 08, 2006 4:05 PM
  Subject: RE: DSCP/COS

  Any takers?

  -----Original Message-----
  From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
  devecchio
  Sent: Monday, May 08, 2006 12:40 PM
  To: ccielab@groupstudy.com
  Subject: DSCP/COS

  Guys,

  I am configuring a L3 port-channel to a distro and all members of this
  portchannel are just standard gig interface with the portchannel command.
ON
  a L3 portchannel, I have the ip configured etc. the command mls qos trust
  dscp is to be used instead of cos due to it being a l3 port? Although the
  switch will map cos-dscp vice versa it will not be expecting a cos value
on
  a l3 port? The rule states if connecting to a router trust dscp/if a
switch
  trust cos...I am guessing the rule still applies for switches as l2 port
  channels and roulers as l3 port channels..

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