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Date: Fri, 13 Apr 2012 15:50:25 +0200
From: Andrew Lunn <andrew@lunn.ch>
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Subject: Re: [B.A.T.M.A.N.] Migration to Batman
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On Fri, Apr 13, 2012 at 03:32:59PM +0200, Mitar wrote:
> Hi!
> 
> On Fri, Apr 13, 2012 at 10:52 AM, Christian Huldt <christian@solvare.se> wrote:
> > Just asking to educate myself.
> 
> I am also doing that.
> 
> > Why would you use L2TP rather than just IPsec?
> 
> We want UDP transport.

Why?

>  Does IPsec tunnels support that?

Don't think so. Its a L3 solution, not L4.

> And
> furthermore, we do not want/need encryption. The main reason for going
> to L2TP is that currently we are using OpenVPN for our L2 tunnels and
> have problems that our links are CPU bound and not bandwidth bound.

Did you try:

auth none
cipher none

       Andrew