Date: Tue, 31 May 2005 14:57:48 -0500 From: Skylar Thompson <skylar@cs.earlham.edu> To: Jon Dama <jd@ugcs.caltech.edu> Cc: Don Lewis <truckman@freebsd.org>, freebsd-stable@freebsd.org, freebsd-questions@freebsd.org Subject: Re: Weird NFS problems Message-ID: <429CC1BC.1050704@cs.earlham.edu> In-Reply-To: <Pine.LNX.4.53.0505311153250.2472@zloty.ugcs.caltech.edu> References: <200505270711.j4R7BTMf078204@gw.catspoiler.org> <Pine.LNX.4.53.0505270145160.640@ngwee.ugcs.caltech.edu> <429C867A.5040909@cs.earlham.edu> <Pine.LNX.4.53.0505311153250.2472@zloty.ugcs.caltech.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig63A298A94E8D527FE8FF3D65 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Jon Dama wrote: >Yes, but surely you weren't bridging gigabit and 100Mbit before? > > >Did you try my suggestion about binding the IP address of the NFS server >to the 100Mbit side? > > Yeah. Unfortunately networking on the server fell apart when I did that. Traffic was still passed and I could get through to the server on the 100Mb/s side, but not on the 1000Mb/s. It looked like the arp tables weren't being forwarded properly, but I couldn't convince FreeBSD to do proxy arp. After doing some more poking around, it actually looks like it might be a misfeature in the Linux 2.4 kernel wrt ipfilter (which is running on the bridge). Apparently 2.4 fragments UDP packets in the reverse order that every other UNIX-like operating system does, which throws off ipfilter's state tables. I'm going to do some testing to see if the difference between UDP and TCP NFS is negligible enough for us to disregard. Thanks for the suggestions! -- -- Skylar Thompson (skylar@cs.earlham.edu) -- http://www.cs.earlham.edu/~skylar/ --------------enig63A298A94E8D527FE8FF3D65 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCnMHAsc4yyULgN4YRApxkAJ9Brs4MyTHWATca8AWm/sAZY5R+nACgoQYW QgIiFW+IK3DvHKQDx07B1jM= =0utg -----END PGP SIGNATURE----- --------------enig63A298A94E8D527FE8FF3D65--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?429CC1BC.1050704>