From: Wang, Ting \(Taylor\) (wangting@avaya.com)
Date: Mon Jun 12 2006 - 12:58:29 ART
Actually, you can use either voice vlan or 802.1q trunk for none cisco
ip phone, like Avaya. For voice vlan, it is better to disable cdp. For
802.1q trunk, it is better to remove other vlans.
Voice vlan can work in trunk mode, I ever heard it have to be used in
case some old model Catalyst can only support Aux vlan in trunk mode.
Maybe Cat 4000?
Taylor
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Carlos Chorao
Sent: Monday, June 12, 2006 4:27 PM
To: James Ventre; Vincent Mashburn
Cc: Vishal Patel; david robin; Cisco certification
Subject: RE: Voice vlan
Agree.
Carlos.Chorao.#11351.r/s
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
James Ventre
Sent: Thursday, 23 March 2006 2:09 a.m.
To: Vincent Mashburn
Cc: Vishal Patel; david robin; Cisco certification
Subject: Re: Voice vlan
> However, if you are not using Cisco Phones, > then you will have to
use 802.1q trunking as indicated in the previous > e-mails.
I have an Avaya VoIP implementation where I use the following:
switchport access vlan 227
switchport mode access
switchport voice vlan 209
If you don't tag any frames coming into the switch, it's in the access
vlan, the phone receives a special DHCP Option which tells it to jump
into VLAN 209 and re-dhcp (normal PC's igonre it). Using the voice vlan
and access commands together essentially make it a trunk with a native
and 1 tagged vlan.
You don't need to use CDP to utilize the simpler config of "voice vlan".
James
Vincent Mashburn wrote:
> You should be able to use access ports with "switchport mode access"
> to support both voice vlan and data vlan. This is due to CDP
enhancements.
> Bacisclly, the CDP packet includes both voice vlan and data vlan
> within each update packet. So, the phone knows that its vlan is in
> the voice vlan portion of the packet and the PC knows that its vlan is
> in the data vlan portion of the packet. However, if you are not using
> Cisco Phones, then you will have to use 802.1q trunking as indicated
> in the previous e-mails.
> Hope this helps
> Vince Mashburn
> Voice / Data Engineer
> 901-263-5072
> Cisco IP Telephony Support Specialist
> CCNP, CCDA,Network +
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