RE: No traffic on trunk without vlan header.

From: Christian Sica (csica@liweb.net)
Date: Tue Dec 13 2005 - 02:19:53 GMT-3


Hi Gustavo,

I would think that you would have to use the "vlan dot1q tag native"
command. All you would do by changing the native VLAN is moving the native
VLAN from 1 to another number. It would still be untagged.

Regards,
Christian

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Gustavo Novais
Sent: Sunday, December 04, 2005 2:30 PM
To: ccielab@groupstudy.com
Subject: No traffic on trunk without vlan header.

Hi,

When faced with a question that states that we must "ensure that all traffic
that is sent over this link is tagged with a vlan header" and the link is a
dot1q trunk, the way I see it we have two options:

We can change the trunk's native vlan and not allow it on the trunk.

Or

We can use the vlan dot1q tag native, and guarantee that there is no
untagged vlan on the trunk.

I have two questions regarding this:

What happens on both situations to DTP,VTP, etc traffic? Are their PDU's
encapsulated also?

Why would we choose one method over another (besides the simplicity of the
latest)?

TIA

Gustavo Novais



This archive was generated by hypermail 2.1.4 : Mon Jan 09 2006 - 07:07:51 GMT-3