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Date: Wed, 11 Jul 2012 13:01:52 +0200
From: Daniel Hartmeier <daniel@benzedrine.cx>
To: Chris Benesch <chris.benesch@gmail.com>
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Cc: freebsd-net@freebsd.org
Subject: Re: GIF tunnel doesnt like fragmented packets?
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On Tue, Jul 10, 2012 at 07:27:04PM -0700, Chris Benesch wrote:

> The only thing I notice is that the ones coming from HE have the DF flag
> set?  Am I on the wrong path?  Have no idea how to get this to work.

The problem isn't fragmentation (those DF packets are not large enough to
require fragmentation), but the fact that you're not answering the
neighbor solicitation queries from the peer.

> ifconfig_gif0_ipv6="inet6 2001:470:66:3a3::2 2001:470:66:3a3::1 prefixlen 128"

See http://www.tunnelbroker.net/forums/index.php?topic=1191.0

Daniel