Date: Wed, 31 Jan 2007 21:47:05 +0100 From: =?ISO-8859-1?Q?C=E9dric?= Jonas <cedric@decemplex.net> To: freebsd-net@freebsd.org Cc: freebsd-current@freebsd.org Subject: fxp(4) checksum (offloading?) errors Message-ID: <20070131214705.0ee0ba67@ganymed>
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--Sig_GiTGV60xmr1k/UmjqFIRHoW Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi, I get TCP/UDP checksum errors with fxp(4). I noticed it after using Wireshark today: Checksum: 0xac18 [incorrect, should be 0xfbc7 (maybe caused by checksum offloading?)] for example. If I understand it more or less correctly, checksum offloading is performed by or with help of the NIC - only for TCP and UDP, where the checksum fails exactly... I didn't found a way to disable it, so I assume it's a bug in the driver... I don't know exactly which infos I must provide additionally to the following, so don't hesitate to ask more :) Used NIC: fxp0: <Intel 82550 Pro/100 Ethernet> port 0xa400-0xa43f mem 0xfb030000-0xfb030fff,0xfb000000-0xfb01ffff irq 16 at device 7.0 on pci2 Used system: FreeBSD ganymed 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Sun Jan 21 16:07:51 CET 2007 root@ganymed:/usr/obj/usr/src/sys/GANYMED i386 --=20 C=E9dric Jonas cedric@decemplex.net GPG ID: 30CCFE8D GPG Key: http://box.decemplex.net/~cedric/cedric.key.asc GPG Fingerprint: CF03 E1FD 9428 1B6B E971 B107 9044 AA99 30CC FE8D Jabber-ID: cedric@decemplex.net --Sig_GiTGV60xmr1k/UmjqFIRHoW Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFwQBQkESqmTDM/o0RAkDdAKCCMGwdc+EMl/hhXTIOwW46w+zPBACfZrG+ 8zc1WUK4mH6T/gJR4yfetm0= =W8o8 -----END PGP SIGNATURE----- --Sig_GiTGV60xmr1k/UmjqFIRHoW--
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