From: John Matus (John.Matus@tokiom.com)
Date: Wed Dec 07 2005 - 17:09:12 GMT-3
since dot1q does not tag the natvie vlan, the easiest solution would be to
tag the native vlan with the "vlan x tag native" commnand.
Regards,
John D. Matus
Technical Support / PAS
Fujitsu Consulting
626-568-7716
John.Matus@tokiom.com
san
<san.study@gmail.
com> To
Sent by: Gustavo Novais
nobody@groupstudy <gustavo.novais@novabase.pt>
.com cc
ccielab@groupstudy.com
Subject
12/07/2005 11:55 Re: No traffic on trunk without
AM vlan header.
Please respond to
san
<san.study@gmail.
com>
Gustavo,
My reading says that:
VTP messages are multicast and a limit of one hop by cisco switches.
Also VTP messages are encapsulated in default vlan (vlan 1). These
messages flow only over trunks.
/SAN
On 12/4/05, Gustavo Novais <gustavo.novais@novabase.pt> wrote:
> 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
>
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