RE: Cat 3550's Voice Vlan configuration.(Resend..)

From: GokhanS@koc.net
Date: Thu Jul 24 2003 - 09:53:24 GMT-3

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Hello

I think there should not be "switchport mode access".this will cause dot1q packets to be dropped.

1)> mls qos
> interface FastEthernet0/9
> mls qos trust cos
> switchport access vlan 20
> switchport voice vlan 500

2)> mls qos
> interface FastEthernet0/9
> mls qos trust cos
> switchport mode trunk
> switchport trunk encapsulation dot1q
> switchport trunk native vlan 20
> switchport voice vlan 500
> no ip address
> no cdp enable
> spanning-tree portfast trunk

Both will work.

Gokhan.

-----Original Message-----
From: Deepesh Chouhan [mailto:deepesh@cisco.com]
Sent: Thursday, July 24, 2003 1:47 AM
To: wwwjjang@chol.com; ccielab@groupstudy.com
Subject: RE: Cat 3550's Voice Vlan configuration.(Resend..)

> mls qos
> interface FastEthernet0/9
> mls qos trust cos
> switchport mode access
> switchport access vlan 20
> switchport voice vlan 500

this will do it.
From Doc CD - "You should configure voice VLAN on switch access ports. "
Hence it' should not be solution 1.

thanks
deeoesh

> Q> Place int fa0/9 in vlan 20
> Assume the cisco ip-phone is connectedto the port(fa0/9).
> Configure this port to carry voice traffic in 802.1Q
> frames on vlan 500
> ---------
> Answer1>
> ----------
> mls qos
> interface FastEthernet0/9
> mls qos trust cos
> switchport mode trunk
> switchport trunk encapsulation dot1q
> switchport trunk native vlan 20
> switchport voice vlan 500
> no ip address
> no cdp enable
> spanning-tree portfast trunk
> ---------
> Answer2>
> ----------
> mls qos
> interface FastEthernet0/9
> mls qos trust cos
> switchport mode access **
> switchport access vlan 20 **
> switchport mode trunk
> switchport trunk encapsulation dot1q
> switchport trunk native vlan 20
> switchport voice vlan 500
> no ip address
> no cdp enable
> spanning-tree portfast trunk
>
>
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