From: Mahmud, Yasser (YMahmud@Solutions.UK.ATT.com)
Date: Wed Mar 26 2003 - 17:37:43 GMT-3
Yes that's correct if no priority sent by the PC, then this command cannot
override and sends the untagged frame to the 3550 switch and you can
override it there using the command
mls qos cos <value yiu want, by default it is 0>
HTH
Yasser
> -----Original Message-----
> From: Songbin Wei [SMTP:sbwei@sbcglobal.net]
> Sent: Wednesday, March 26, 2003 6:48 PM
> To: ccielab@groupstudy.com
> Subject: data traffic from IP phone
>
> If there is a pc connected to an IP phone, the data
> traffic should a pure ethernet frame, i.e. there is no
> COS bits at all. How can we have the command
>
> switchport priority extend cos value
>
> to Set the IP phone access port to override the
> priority received from the PC or the attached device.
>
> If the frame has no COS, how can the command override
> it, something not existing at all?
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