From mboxrd@z Thu Jan  1 00:00:00 1970
From: Axel Neumann <axel@open-mesh.net>
Subject: Re: [B.A.T.M.A.N.] two-way-tunnel quirks
Date: Tue, 4 Dec 2007 13:37:17 +0100
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To: The list for a Better Approach To Mobile Ad-hoc Networking <b.a.t.m.a.n@open-mesh.net>

Hi,

>
> Still I could not yet reproduce the problem but I am quite sure
> that this has something to do with the msn&co.coms' reluctance to
> respond to icmp messages.

Well, after a while my office colleague did.

Actually, it took me a while to understand that my experiments on our office 
server and his annoyance about an "unstable" imap account had something in 
common :-(

The only solution we found to circumvent such small-mtu paths was:
- avoid related web services OR (not so good)
- Use openvpn over the path with the reduced mtu. Seems like openvpn fragments 
and de-fragments the packets transparently between related end2end tun0 
interfaces. This even worked on his windows machine. 

Perhaps this might also become an outlook-item for the next batman tunnel 
implementation :-)

ciao,
axel

>
> ciao,
> axel
>
> > cheers
> >
> >   --Jan
>
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