From owner-freebsd-net@FreeBSD.ORG Sat Oct 20 09:22:19 2007 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C8E5B16A419 for ; Sat, 20 Oct 2007 09:22:19 +0000 (UTC) (envelope-from wmoran@collaborativefusion.com) Received: from mx00.pub.collaborativefusion.com (mx00.pub.collaborativefusion.com [206.210.89.199]) by mx1.freebsd.org (Postfix) with ESMTP id 8B18413C47E for ; Sat, 20 Oct 2007 09:22:15 +0000 (UTC) (envelope-from wmoran@collaborativefusion.com) Received: from working (c-71-60-127-199.hsd1.pa.comcast.net [71.60.127.199]) (AUTH: LOGIN wmoran, SSL: TLSv1/SSLv3,256bits,AES256-SHA) by wingspan with esmtp; Sat, 20 Oct 2007 05:11:50 -0400 id 00056407.4719C656.00016E97 Date: Sat, 20 Oct 2007 05:11:49 -0400 From: Bill Moran To: Mike Silbersack Message-Id: <20071020051149.672a9913.wmoran@collaborativefusion.com> In-Reply-To: <20071019212012.C97691@odysseus.silby.com> References: <20071019182349.J97691@odysseus.silby.com> <47194EA1.8000402@u.washington.edu> <20071019212012.C97691@odysseus.silby.com> Organization: Collaborative Fusion Inc. X-Mailer: Sylpheed 2.4.7 (GTK+ 2.10.14; i386-portbld-freebsd6.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Garrett Cooper , net@freebsd.org Subject: Re: Marvell chipsets on 8-CURRENT and XP x64 won't talk with one another X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Oct 2007 09:22:19 -0000 Mike Silbersack wrote: > > > On Fri, 19 Oct 2007, Garrett Cooper wrote: > > >> Just to clarify, how are the two hooked together? Is it over gigabit > >> switch, a 10mbps hub, or directly cabled together? > >> > >> -Mike > > > > Sure. They're both connected over a gigabit switch, but the Windows > > driver's kind of sketchy because it keeps on switching between 100MBit and > > 1GBit. I haven't really paid that much attention to what speed the FreeBSD > > msk driver is registering at. > > -Garrett > > Ah ha! > > I had the flopping between 100mbps and 1gbps problem with some Intel cards > once - some of the machines in the lab were fine, others kept switching > back and forth. We eventually narrowed it down to the cables we had > hand-made; some of them just weren't up to snuff, and the NIC apparently > decided that it had to go back down to 100. > > I think you should switch your gigabit switch out for a 100mbps switch and > see if the network becomes more reliable. Better would be to: a) Fix or replace the faulty wiring. Just because it _seems_ to be OK at 100 doesn't mean it is. If it's unable to work reliably at a speed it should work at, you need to fix that. b) Force the speed/duplex on both ends. One of the ugliest networking problems I've seen is when the two ends negotiate different speeds or duplexes. It amazes me how few people are familiar with this problem and how to diagnose/fix it. -- Bill Moran Collaborative Fusion Inc. wmoran@collaborativefusion.com Phone: 412-422-3463x4023