dotq has the notion of a native vlan, which can be used for anything
not tagged. isl doesn't, but it's trivial to set up a .1 as an
anything vlan...
as long as the port admits to being in trunking mode, it will break
down the dotq encapsulation and direct incoming packets to where
they should go.
George
> From: "Charley Kline" <kline@uiuc.edu>
> To: <cisco-nsp@puck.nether.net>
> Subject: RE: [nsp] Routing between VLANs using 802.1q
> Date: Mon, 24 Jan 2000 15:26:55 -0600
>
> > This is where I have the problem. The switch port is either a trunk, or
> > a VLAN member. Example:
>
> Even in trunk mode there is a "native vlan" which is not tagged. Use "show
> trunk" to see that:
>
> switch4-1> sh trunk 5/3
> Port Mode Encapsulation Status Native vlan
> -------- ----------- ------------- ------------ -----------
> 5/3 on dot1q trunking 1
>
> Port Vlans allowed on trunk
> -------- ------------------------------------------------------------------
> ---
> 5/3 1,4,100
>
> Port Vlans allowed and active in management domain
> -------- ------------------------------------------------------------------
> ---
> 5/3 1,4,100
>
> Port Vlans in spanning tree forwarding state and not pruned
> -------- ------------------------------------------------------------------
> ---
> 5/3 1,4,100
>
>
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