From: Rohan Grover (rohang@cisco.com)
Date: Wed Jun 16 2004 - 14:58:38 GMT-3
Hi,
It is done via CDP and the explanation is right.
Normally though cos bits from the user PC should not be trusted so you would use 'switchport priority extend cos <x>' to override
the pc data with cos x.
Thanks
Rohan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Richard Dumoulin
Sent: Wednesday, June 16, 2004 11:00 PM
To: Koen Peetermans; ccielab@groupstudy.com
Subject: RE: Voice vlan setting
I believe this is done via CDP but I have never tested it,
--Richard
-----Original Message-----
From: Koen Peetermans [mailto:K.Peetermans@chello.be]
Sent: miircoles, 16 de junio de 2004 18:21
To: Richard Dumoulin; ccielab@groupstudy.com
Subject: RE: Voice vlan setting
Probably a stupid question, but since I've never worked with an IP-Phone might as well ask it :
Are all these commands executed on the catalyst switch ? I find it rather strange that the "phone overrides pc traffic" with a
command executed on the catalyst switch. Is this right, does the phone "know" what to do with COS because of the command on the
catalyst, or does the catalyst does this job and not the phone ?
Koen.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Richard Dumoulin
Sent: woensdag 16 juni 2004 17:59
To: Tom Young; ccielab@groupstudy.com
Subject: RE: Voice vlan setting
Do you want the pc attached to the phone to be trsuted by the phone ? If yes then you need "switchport priority extend trust". Then
the switch will trust both the voice and the pc thx to "mls qos trust cos". If not then just "mls qos trust cos" as the phone will
override pc traffic to COS 0,
--Richard
-----Original Message-----
From: Tom Young [mailto:gitsyoung@yahoo.co.jp]
Sent: miircoles, 16 de junio de 2004 17:08
To: ccielab@groupstudy.com
Subject: Voice vlan setting
Hi, group
Look the two commands below for setting voice vlan. If I
want to trust a VoIP telephone setting, should I need set
the two command on the voice vlan interface ?
switchport priority extend trust
mls qos trust cos
Thanks alot
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