From mboxrd@z Thu Jan  1 00:00:00 1970
From: Philip Craig <philipc@snapgear.com>
Subject: Re: [question] bridged tunnel
Date: Tue, 28 Jul 2009 18:12:28 +1000
Message-ID: <4A6EB2EC.3050907@snapgear.com>
References: <20090728075928.GB3633@psychotron.englab.brq.redhat.com>
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To: Jiri Pirko <jpirko@redhat.com>
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Jiri Pirko wrote:
> Hello all.
> 
> Imagine following net scheme:
> 
> LAN1 --- ROUTER A --- ROUTER B --- LAN2
> 
> I would like to have LAN1 and LAN2 bridged together.

You can do that with gretap devices.

If you don't want to use GRE, then at least it provides an
example of how to do this in the kernel.