Date: Thu, 6 Feb 2014 11:02:46 -0800 From: hiren panchasara <hiren.panchasara@gmail.com> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Jack F Vogel <jfv@freebsd.org> Subject: Re: Errors using span interface on if_bridge(4) Message-ID: <CALCpEUH31Q37AaCgHzAaXygFjRp_eUpEbxeMgfHjY7XRFFh9gQ@mail.gmail.com> In-Reply-To: <CALCpEUG09C773XKWA=tpeE42AbEvF1y9ipqPROP3rZoe-ZNu9g@mail.gmail.com> References: <CALCpEUH7YHhG3gw0wrObsJux=PWmJu2K6_tzCbCfXQ21ENYHdw@mail.gmail.com> <CALCpEUEuXR7_Q8_zt2TjnsOqt_rYMH5do=UEjssqkj684Xdimg@mail.gmail.com> <CALCpEUFLwZ6vismFKgyo1Q_P4iwzxS%2BjBozTV%2BO1kvap6U8brQ@mail.gmail.com> <CALCpEUE4V-CXkT3R0tzr1K075RBX_HKHPF%2BP-WTT15FkH5cuQA@mail.gmail.com> <CALCpEUH-5vWoU-Q-fWsmUGLrS3H--4WXcbejf1TQc=ZNmFOXvQ@mail.gmail.com> <CALCpEUEZmMvVRAf8DtRBpPtYgZDB3ufNaAhDpmrnVaiPXv3veg@mail.gmail.com> <CALCpEUG09C773XKWA=tpeE42AbEvF1y9ipqPROP3rZoe-ZNu9g@mail.gmail.com>
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On Sun, Feb 2, 2014 at 11:25 PM, hiren panchasara <hiren.panchasara@gmail.com> wrote: <skip> > If I start tcpdump on > interface again, the dev.ix.3.mac_stats.checksum_errs starts going up. > Stopping tcpdump would stop the counter from incrementing. > > Why is that happening? I have no clue. How/why is tcpdump affecting > this interface traffic stats in such a way? Found the reason: http://www.wireshark.org/faq.html#q11.1 http://sandilands.info/sgordon/segmentation-offloading-with-wireshark-and-ethtool Putting an end to arguably the longest monologue on -net :-) cheers, Hiren
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