Page 1 of 1

voice vlan on cisco switch and alcatel ip phone

Posted: 09 Feb 2011 00:55
by smartsoul2
hi , I have a fully cisco switched network comprising 5 vlans ( for example 2,3,4,5 and 6 ).
I will be deploying alcatel OXE and alcatel ip phone soon. I am planning to use the LAN port on the alcatel ip phone to connect the computers to the network.
Normally i would use the below config on my cisco switch

Data vlan 2,3,4,5,6
voice vlan 7.

Switch(config)# interface FastEthernet0/1
Switch(config-if)# switchport access vlan 2
Switch(config-if)# switchport mode access
Switch(config-if)# switchport voice vlan 7
Switch(config-if)# spanning-tree portfast
!
Switch(config)# interface FastEthernet0/2
Switch(config-if)# switchport access vlan 3
Switch(config-if)# switchport mode access
Switch(config-if)# switchport voice vlan 7
Switch(config-if)# spanning-tree portfast

now i know that the PC should be using untagged frames and the IP phone should be using 802.1q tagged frames.

Will the above config work or should i specify a native vlan ( that is the data vlan) on each port? If i recall well , once i specify the voice vlan , the access vlan traffic becomes untagged right?

If i specify a native vlan the config should look like below :
interface FastEthernet0/1
switchport access vlan 2
switchport trunk native vlan 2
switchport mode access
switchport voice vlan 7
!
interface FastEthernet0/2
switchport access vlan 3
switchport trunk native vlan 3
switchport mode access
switchport voice vlan 7

Do i need to specify the native vlan command for my setup to work?
Please note that i am doing intervlan routing between all of the above vlans.
many thanks in advance

Re: voice vlan on cisco switch and alcatel ip phone

Posted: 09 Feb 2011 08:40
by krzysioD

Re: voice vlan on cisco switch and alcatel ip phone

Posted: 09 Feb 2011 11:42
by smartsoul2
cisco.com is the obvious answer , but as we are talking about alcatel ip phone connected to cisco switches thats why i posted it here!!!

Re: voice vlan on cisco switch and alcatel ip phone

Posted: 29 Aug 2011 16:15
by logster
No, the config you have will work as long as the IP parameters within the phone are set to enable VLAN and ID is 7. You do not need to use any trunk statements

Re: voice vlan on cisco switch and alcatel ip phone

Posted: 26 Apr 2012 13:52
by here-mhu
For each port configure mode as trunk.
Permit VLAN ID for Voice VLAN, Then IP Phone tag voice VLAN ID
Configure native/passive VLAN ID to ID of data VLAN.

For example with Alcatel LS6200, Use this concept.
VLAN 2 for Voice
VLAN 3 for DATA

interface ethernet e13
switchport mode trunk
switchport trunk allowed vlan add 2
switchport trunk native vlan 3

Manage use vlan and VLAN ID in IP phone.