From: Tom Young (gitsyoung@yahoo.co.jp)
Date: Wed Jun 16 2004 - 23:47:49 GMT-3
Richard
I read the document from the site below.
--- Richard Dumoulin <richard.dumoulin@vanco.es> $B$+$i$N(B
$B%a%C%;!<%8!'(B
> Well, not sure where you read that but normally you
> need trunk if if you
> want to use COS. More over if you are going to
> separate data from voice
> vlans on the same port then how else can you do it ?
> Note that by default, when plugging a Cisco phone
> onto the switch the trunk
> will be dynamically negociated,
>
> --Richard
>
> -----Original Message-----
> From: Tom Young [mailto:gitsyoung@yahoo.co.jp]
> Sent: jueves, 17 de junio de 2004 3:11
> To: Nii orfson
> Cc: ccielab@groupstudy.com
> Subject: RE: Voice vlan setting
>
>
> In the cisco.com's voice vlan configuration
> guidelines.It
> said should configure voice VLAN on switch access
> ports.
> So the trunk mode is useless.
>
> Infact , one thing I am very worry about, that is
> the voip telephone could
> set the ip precedence and Diffserv parameter. If the
> voice traffic pass
> through the catalyst, I am worry about ip precedence
> and Diffserv setting
> will be changed to the default.
>
>
> --- Nii orfson <norfson@hotmail.com>
> $B$+$i$N%a%C%;!<%8!'(B
>
> <HR>
> <html><div style='background-color:'><DIV class=RTE>
> <P>I would still recommend using setting a voice
> vlan to separate the voice
> from the data traffic. If you are not using a
> cisco phone, trunking
> between the switch and the phone might be useless.
> If trunking is not
> enabled on the ingress port, then the switch will
> not recieve QoS setting
> from the phone. However, a PC attached to the phone
> might try set traffic
> with a higher priority, so use the switchport
> priority extend cos to prevent
> this. Set the voice media traffic on the ingress
> port to cos 5 or dscp 46,
> set the voice signalling to cos 3, and set data to
> cos 0.<BR><BR></P></DIV>
> <DIV></DIV>>From: Tom Young
> <gitsyoung@yahoo.co.jp>
> <DIV></DIV>>Reply-To: Tom Young
> <gitsyoung@yahoo.co.jp>
> <DIV></DIV>>To: Richard Dumoulin
> <richard.dumoulin@vanco.es>
> <DIV></DIV>>CC: ccielab@groupstudy.com
> <DIV></DIV>>Subject: RE: Voice vlan setting
> <DIV></DIV>>Date: Thu, 17 Jun 2004 09:16:49 +0900
> (JST)
>
> <DIV></DIV>>
> <DIV></DIV>>Richard
> <DIV></DIV>> If my IP
> phone is
> not the cisco ip phone. And only
> <DIV></DIV>>voice communication be used . How
> about
> that two commands?
> <DIV></DIV>>
> <DIV></DIV>>And the cdp will not work correctly,
> does
> some affect will
> <DIV></DIV>>happened ?
> <DIV></DIV>>
> <DIV></DIV>>Thanks alot
> <DIV></DIV>>
> <DIV></DIV>>--- Richard Dumoulin
> <richard.dumoulin@vanco.es>
> $B$+$i$N(B
> <DIV></DIV>>$B%a%C%;!<%8!'(B
> <DIV></DIV>> > Do you want the pc attached to
> the
> phone to be
> <DIV></DIV>> > trsuted by the phone ? If yes
> <DIV></DIV>> > then you need "switchport
> priority
> extend trust".
> <DIV></DIV>> > Then the switch will trust
> <DIV></DIV>> > both the voice and the pc thx
> to "mls
> qos trust
> <DIV></DIV>> > cos".
> <DIV></DIV>> > If not then just "mls qos trust
> cos"
> as the phone
> <DIV></DIV>> > will override pc traffic
> <DIV></DIV>> > to COS 0,
> <DIV></DIV>> >
> <DIV></DIV>> > --Richard
> <DIV></DIV>> >
> <DIV></DIV>> > -----Original Message-----
> <DIV></DIV>> > From: Tom Young
> [mailto:gitsyoung@yahoo.co.jp]
> <DIV></DIV>> > Sent: miircoles, 16 de junio de
> 2004
> 17:08
> <DIV></DIV>> > To: ccielab@groupstudy.com
> <DIV></DIV>> > Subject: Voice vlan setting
> <DIV></DIV>> >
> <DIV></DIV>> >
> <DIV></DIV>> > Hi, group
> <DIV></DIV>> >
> <DIV></DIV>> > Look the two
> commands
> below for setting voice vlan.
> <DIV></DIV>> > If I
> <DIV></DIV>> > want to trust a VoIP telephone
> setting, should I
> <DIV></DIV>> > need set
> <DIV></DIV>> > the two command on the voice
> vlan interface ?
> <DIV></DIV>> >
> <DIV></DIV>> > switchport priority extend
> trust
> <DIV></DIV>> > mls qos trust cos
> <DIV></DIV>> >
> <DIV></DIV>> > Thanks alot
> <DIV></DIV>> >
> <DIV></DIV>> >
> <DIV></DIV>> >
> <DIV></DIV>> >
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