From: Tom Young (gitsyoung@yahoo.co.jp)
Date: Wed Jun 16 2004 - 22:11:27 GMT-3
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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