From: Radoslav Vasilev (deckland@gmail.com)
Date: Sat Sep 30 2006 - 06:38:59 ART
Hi,
The second one is incorrect.
The Voice VLAN feature can be configured on static access or dynamic
access ports.
Therefor configuring the port as dot1q is an incorrect. Now, once we
agree that the physical swtich port should be in access mode, we have
the following options for the additional voice vlan:
1. make the phone and the switch port carry the voice vlan in dot1q
frames (you don't need to configure the port as trunk !!!):
switchport voice vlan <voice_vlan_id>
don't forget to create the vlan on the vtp server/locally.
check the status with: show interface ... switchport
2. make the phone and the switch carry the voice vlan in dot1p frames
(traffic is CoS marked but uses the default vlan 0).
switchport voice vlan dot1p
check the status with: show interface ... switchport
Rado
On 9/30/06, Magmax <magmax@bigpond.net.au> wrote:
> Guys,
>
>
>
>
>
> Let say I am configuring voice port on 3550.Is there any difference in these
> two methods. In think both should be ok .
>
>
>
> Method 1
>
> mls qos
>
> interface FastEthernet0/19
>
> switchport access vlan XX
>
> switchport voice vlan XX
>
>
>
>
>
> Final config
>
>
>
>
>
> mls qos
>
> interface FastEthernet0/19
>
> switchport access vlan XX
>
> switchport voice vlan XX
>
> switchport mode dynamic desirable
>
> spanning-tree portfast
>
>
>
>
>
>
>
> Method 2
>
>
>
> mls qos
>
> interface FastEthernet0/7
>
> switchport voice vlan XX
>
> switchport trunk encapsulation dot1q
>
> switchport mode trunk
>
> switchport trunk native vlan XX
>
> mls qos trust cos
>
>
>
>
>
> Final config
>
>
>
> mls qos
>
> interface FastEthernet0/7
>
> switchport voice vlan XX
>
> switchport trunk encapsulation dot1q
>
> switchport mode trunk
>
> switchport trunk native vlan XX
>
> mls qos trust cos
>
> spanning-tree portfast
>
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This archive was generated by hypermail 2.1.4 : Sun Oct 01 2006 - 16:55:41 ART