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Re: 802.1q native vlan posted 10/06/2002
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How do you bridge 2 vlans together? Doesn't the vlan header prevent this? I
am thouroghly confused. If the native vlan is 1 then any traffic going out
an interface in vlan 1 would get tagged upon leaving the interface wouldn't
it. Whether it was the native vlan or not.



----- Original Message -----
From: "P729" <p729@xxxxxxx>
To: "Chris" <clarson52@xxxxxxxxxxx>; "chenyan" <chenyan@xxxxxxxxxxxxxx>;
"ccielab" <ccielab@xxxxxxxxxxxxxx>
Sent: Sunday, October 06, 2002 2:05 PM
Subject: Re: 802.1q native vlan


> "Any untagged frames will get tagged..."
>
> Mmmm...sounds kinda contradictory doesn't it? Actually, frames assigned to
> the native VLAN of the trunk are sent untagged across the trunk, period.
But
> one might ask, "how would the switches on each end know when there's a
> native VLAN mismatch?" The answer for Cisco switches is through CDP. If
CDP
> is disabled or not available, then they wouldn't know and you can pretty
> much bridge the two VLANs together and maybe not know it...
>
> Regards,
>
> Mas Kato
> https://ecardfile.com/id/mkato
> ----- Original Message -----
> From: "Chris" <clarson52@xxxxxxxxxxx>
> To: "chenyan" <chenyan@xxxxxxxxxxxxxx>; "ccielab" <ccielab@xxxxxxxxxxxxxx>
> Sent: Sunday, October 06, 2002 9:48 AM
> Subject: Re: 802.1q native vlan
>
>
> Any untagged frames will get tagged to the native vlan and travel the
native
> vlan.
>
>
> ----- Original Message -----
> From: "chenyan" <chenyan@xxxxxxxxxxxxxx>
> To: "ccielab" <ccielab@xxxxxxxxxxxxxx>
> Sent: Sunday, October 06, 2002 11:13 AM
> Subject: 802.1q native vlan
>
>
> > hi,guys
> >
> > I want to know why there is native vlan for 802.1q and what is that for?
> >
> > Thanks