RE: Voice VLAN and data traffic with and without trunking mode

From: Scott Morris (swm@emanon.com)
Date: Thu Jun 26 2003 - 15:14:27 GMT-3

The second option will work just fine. You aren't configuring a trunk
(therefore no default ISL), but the phone will be able to process the
different vlans without difficulty. It's a cleaner approach so you
don't need to worry about whether you forgot to limit the number of
vlan's being trunked or not.

Scott

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jung, Jin
Sent: Thursday, June 26, 2003 2:11 PM
To: chenry@reuna.cl; ccielab@groupstudy.com
Subject: RE: Voice VLAN and data traffic with and without trunking mode
co nfigured

I think
You need put "switchport encap trunk dot1q" for second option. But not
"switchport mode trunk".

For the second option, port will except trunk encapsulated packets, but
it will be ISL not DOT1q, since most of Cisco phone, if not all, will
only support DOT1Q trunking.

jin jung...

-----Original Message-----
From: James.Jackson@broadwing.com [mailto:James.Jackson@broadwing.com]
Sent: Thursday, June 26, 2003 1:58 PM
To: chenry@reuna.cl
Cc: ccielab@groupstudy.com
Subject: RE: Voice VLAN and data traffic with and without trunking mode
co nfigured

The two options look fine. As I understand it, in case 2, the port is
not configured as a trunk however it is still able to process the 802.1Q
packets coming from IPphone.

James

-----Original Message-----
From: Cristian Henry H [mailto:chenry@reuna.cl]
Sent: Thursday, June 26, 2003 12:48 PM
Cc: ccielab@groupstudy.com
Subject: Voice VLAN and data traffic with and without trunking mode
configured

Dear all,

If the requirement is to put the voice traffic (from IP Phone) in VLAN
101 and the data traffic (from behind IP Pone)in VLAN 102, what do you
think about the following cases/configurations?, Do both ones the same?

1) With 802.1q trunking mode configured
 
interface FastEthernet0/10
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 102
 switchport mode trunk
 switchport voice vlan 101
 no ip address
 spanning-tree portfast
!

2) Without 802.1q trunking mode configured

interface FastEthernet0/10
 switchport access vlan 102
 switchport voice vlan 101
 spanning-tree portfast
!
In this 2) case, Does the port get automatically trunking mode 802.1q?,
is necesary to add " switchport trunk encapsulation dot1q"?, and if the
port is trunk, does the "switchport access vlan 102" works well?

Thanks in advance. 

-- 
Cristian E. Henry
REUNA

E-mail: chenry@reuna.cl
Fono: 56-2-3370336

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