From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Walter Subject: linux 3.13: problems with isatap tunnel device and UFO Date: Fri, 07 Feb 2014 18:47:07 +0100 Message-ID: <1682505.dP4nT04FC9@h2o.as.studentenwerk.mhn.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Hannes Frederic Sowa To: netdev@vger.kernel.org Return-path: Received: from dresden.studentenwerk.mhn.de ([141.84.225.229]:38916 "EHLO email.studentenwerk.mhn.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751056AbaBGRxJ convert rfc822-to-8bit (ORCPT ); Fri, 7 Feb 2014 12:53:09 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Hello, with kernel 3.13 I have a problem with isatap tunnels receiving fragmen= ted=20 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=20 tunnel device. The packets seem to be discarded. With UFO off I can see them on is0 (and the packet is delivered to the=20 socket). Regards, --=20 Wolfgang Walter Studentenwerk M=FCnchen Anstalt des =F6ffentlichen Rechts