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Date: Wed, 18 Jun 2008 17:41:43 +0200
From: Francesco Dolcini <fdolcini@sysnetsistemi.it>
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Subject: Re: [Bridge] kernel doesn't support bridge with a ppp interface ?
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To: Malcolm Scott <Malcolm.Scott@cl.cam.ac.uk>
Cc: "c.j" <c.james.cj@gmail.com>, bridge@lists.linux-foundation.org

Malcolm Scott wrote:
> At 21:02 today, c.j wrote:
> 
>>> You can setup a tunnel with OpenVPN. You'd get a tap device on
>>> both sides which can be bridged with eth.
>> Thanks. But maybe we don't want OpenVPN for VPN. Now I can't get why kernel
>> do not support that. Have some disadvantages?
> 
> I'm not sure if this is even possible using standard protocols.  Bridging is 
> for Ethernet; PPP is not Ethernet.  So this would require some sort of 
> nonstandard Ethernet-over-PPP encapsulation protocol, and would only make 
see standard rfc3518, http://www.ietf.org/rfc/rfc3518.txt, I think there 
is a (old?) patch  flying around for this ...