netdev - linux 3.13: problems with isatap tunnel device and UFO

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Message-ID: <1682505.dP4nT04FC9@h2o.as.studentenwerk.mhn.de>
Date:	Fri, 07 Feb 2014 18:47:07 +0100
From:	Wolfgang Walter <linux@...m.de>
To:	netdev@...r.kernel.org
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: linux 3.13: problems with isatap tunnel device and UFO

Hello,

with kernel 3.13 I have a problem with isatap tunnels receiving fragmented 
ipv6 udp packets.

If I switch of ufo for the tunnel device the problem disappears:
	ethtool -K is0 ufo off

When UFO is on tcpdump shows the packets on the physical device but not on the 
tunnel device. The packets seem to be discarded.

With UFO off I can see them on is0 (and the packet is delivered to the 
socket).

Regards,
-- 
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts
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