[cisco-voip] 3560 QOS bug?

[Ortiz, Carlos]

Jim,

What is attached to the switchport?  We saw this happen with our Unity
server one time.  I think we mistakenly turned on auto qos and had trust
cisco phone on the port.  The fact that it wasn't a phone was causing
the COS not to be trusted.   This in turn would remove EF setting when
exiting the switch.  The fix was to put the command mls qos trust dscp
on the port.

Carlos

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jim McBurnett
Sent: Sunday, July 30, 2006 12:53 AM
To: Ted Nugent; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] 3560 QOS bug?

The thing that really gets me, is it comes in to the 3560 as EF
It leaves it and comes into the 4500 as DCSP 0

I could see a COS trust map issue putting it to something else.. But
this?

J
 

-----Original Message-----
From: Ted Nugent [mailto:tednugent69 at yahoo.com] 
Sent: Saturday, July 29, 2006 11:44 PM
To: Jim McBurnett; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] 3560 QOS bug?

Also check your trunk to the 4500 and make sure your trusting DSCP...
sorry to state the obvious.

--- Jim McBurnett <jim at tgasolutions.com> wrote:

> 
> 
> 
> Has anyone seen a bug where a 3560 with a QOS config will remove the 
> EF DSCP tagging on a packet as it traverses the switch?
> I have a packet capture where a packet came in marked on a Fast E port

> and when it comes into the upstream 4500 it is not marked EF 
> anymore...
> 
> Thoughts?
> 
> Thanks,
> Jim
> 
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