Date: Wed, 20 Jun 2007 10:07:35 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: David Cornejo <dave@dogwood.com> Cc: freebsd-net@freebsd.org Subject: Re: soekris/sis tx checksum problems Message-ID: <20070620100441.E98813@maildrop.int.zabbadoz.net> In-Reply-To: <4678896b.1cef600a.1a79.7312@mx.google.com> References: <4678896b.1cef600a.1a79.7312@mx.google.com>
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On Tue, 19 Jun 2007, David Cornejo wrote: Hi, > I am using CURRENT on a Soekris 4801 (sis ethernet). With a recent kernel > all TCP packets sent via sis0 have a bad checksum. Other systems using other > interface types (though I don't have a broad selection to test) don't seem to > suffer from this problem. how do you see the bad checksum? Are you running tcpdump on that sis interface or did you have "invalid packets" on the remote machine? If it's the former that's because of hardware checksumming and you should be able to ignore it. You can try ifconfig sis0 -txcsum and tcpdump would be fine again but the soekris cpu itself would compute the checksum then. /bz -- Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT Software is harder than hardware so better get it right the first time.
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