From mboxrd@z Thu Jan 1 00:00:00 1970 From: patric Subject: Re: tg3 issues Date: Fri, 20 Jul 2007 18:59:03 +0200 Message-ID: <46A0E9D7.7020904@imperialnet.org> References: <469E78A2.80904@imperialnet.org> <366312910707190419se33ddd2o3870b5684e077276@mail.gmail.com> <20070719113755.GA1934@hmsreliant.homelinux.net> <469F6601.20800@imperialnet.org> <1184866465.10854.45.camel@dell> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Neil Horman , netdev To: Michael Chan Return-path: Received: from mailfront-6.lil-sth.crystone.net ([83.168.207.14]:43959 "HELO mailfront-6.lil-sth.se.crystone.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1764148AbXGTQ7O (ORCPT ); Fri, 20 Jul 2007 12:59:14 -0400 In-Reply-To: <1184866465.10854.45.camel@dell> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Michael Chan wrote: > On Thu, 2007-07-19 at 15:24 +0200, patric wrote: > > >> Just a hypothetical question. If the 2 network cards starts the >> autonegotiation would it be possible that they get into a loop where >> they are chasing each others state? Maybe a fix could be to add a sleep >> of a random length that would enable them to catch up? Maybe you know if >> any of the fiber-cards so support running without flowcontrol too since >> the cards don't seem to be able to get a link with flowcontrol turned >> off at least in this setup. >> >> >> > > The old 5701 fiber NICs do not support autonegotiation in hardware so it > is done "by hand" in the driver. It is not the most robust way of doing > autoneg and what you described is totally possible. You might want to > try disabling autoneg to see if it works any better. There is only one > possible speed in fiber and autoneg is really only used to negotiate > flow control. Some switch ports will not link up if the link partner > does not do autoneg though. > > You have to use ethtool in initrd to turn off autoneg or just modify the > driver to disable autoneg. > > > Thanks... That's a confirmation on what i suspected.. I think i'll dig into the code instead and try to figure out some way of making it work a bit better for my setup atleast... I'll post a patch later if i get something working... Btw, do you have any timings on how long it takes for the cards to get a lock on the link? Thanks for your input! /Patric