From: Anderson Mota Alves (mota_anderson@hotmail.com)
Date: Mon Jul 10 2006 - 11:23:10 ART
Hi Chuck,
First of all I would check to see if the voice vlan is really created on the
switch, because when you type "switchport voice vlan" on the switch it
doesn't create the vlan automatically like it would do typing "swtichport
access vlan" so do a "show vlan" to see if the vlan 252 is really there.
And then if you would like to make sure that the Phones is trusted by the
switch with the CoS 5 (that's the default Cos that all the Cisco Ip Phones
setup by default) configure:
mls qos
int fa0/16
mls qos trust device cisco-phone
mls qos trust cos (to trust the cos of the phone)
switchport priority extend cos 0 (if you want to make sure that the Cos of
the PC attached to the phone will be set to 0 as
showed in Victor's config.
For reference:
http://www.cisco.com/en/US/products/hw/switches/ps5213/products_configuration_guide_chapter09186a00801ce010.html
Regards,
Andy
>From: "Victor Cappuccio" <cvictor@protokolgroup.com>
>Reply-To: "Victor Cappuccio" <cvictor@protokolgroup.com>
>To: "'Church, Chuck'" <cchurch@multimax.com>, "'Cisco
>certification'" <ccielab@groupstudy.com>
>Subject: RE: OT - Cisco phones and Voice VLAN
>Date: Mon, 10 Jul 2006 09:44:34 -0400
>
>Hi Chuck
>
>You Need to:
>
> * Enable the QOS
> * Define the data VLAN
> * What is allowed in the trunk
> * Set trunk mode
> * Define the Voice VLAN
>
>MLS QOS
>!
>interface FastEthernet0/1
> switchport trunk encapsulation dot1q
> switchport trunk native VLAN 152
> switchport trunk allowed VLAN 1,152,155,1002-1005
> switchport mode trunk
> switchport voice VLAN 155
> switchport priority extend cos 0
> spanning-tree portfast
>
>Regards
>Victor.-
>
>-----Mensaje original-----
>De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
>Church, Chuck
>Enviado el: Lunes, 10 de Julio de 2006 09:20 a.m.
>Para: Cisco certification
>Asunto: OT - Cisco phones and Voice VLAN
>
>Hey all,
>
> Sorry about the OT, but I'm having trouble getting some Cisco IP
>phones to work correctly with older 2900XL switches. The switches are
>the 8 mb variety, and running the latest 12.0 software. The config on
>the switch looks like this:
>
>interface FastEthernet0/16
> switchport access vlan 251
> switchport trunk encapsulation dot1q
> switchport voice vlan 252
> spanning-tree portfast
>
> Looking around CCO seems to indicate this is the correct way to
>do it. From the phone's menu, I can see it's being given VLAN 252 for
>it's admin VLAN. But when I look on the switch, the phone's MAC address
>shows up in VLAN 251 only. So the phone is being told correctly about
>voice VLAN, but it's either not tagging it's traffic with 252 like it
>should, or the switch is ignoring it. Any ideas?
>
>Thanks,
>
>Chuck Church
>Network Engineer
>CCIE #8776, MCNE, MCSE
>Multimax, Inc.
>Enterprise Network Engineering
>Home Office - 864-335-9473
>Cell - 864-266-3978
>cchurch@multimax.com
>
>Netco Government Services has recently acquired Multimax and is changing
>its
>name to Multimax Inc.
>Visit http://www.multimax.com for more information.
>
>Note: My email address has changed. Please take a moment to update your
>records with my new address.
>
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