From owner-freebsd-net Tue Oct 26 17:25:27 1999 Delivered-To: freebsd-net@freebsd.org Received: from implode.root.com (root.com [209.102.106.178]) by hub.freebsd.org (Postfix) with ESMTP id 3229214C92 for ; Tue, 26 Oct 1999 17:25:22 -0700 (PDT) (envelope-from dg@implode.root.com) Received: from implode.root.com (localhost [127.0.0.1]) by implode.root.com (8.8.8/8.8.5) with ESMTP id RAA23991; Tue, 26 Oct 1999 17:21:54 -0700 (PDT) Message-Id: <199910270021.RAA23991@implode.root.com> To: "Craig Critchley" Cc: "Garrett Wollman" , net@FreeBSD.ORG Subject: Re: FTP Net Performance In-reply-to: Your message of "Tue, 26 Oct 1999 17:04:05 PDT." <1f6601bf200e$c8e476b0$0201010a@fuzzer.com> From: David Greenman Reply-To: dg@root.com Date: Tue, 26 Oct 1999 17:21:54 -0700 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org >Thanks. I guess I need to track down the thesis and give it a read - the >graphs themselves are relatively uninteresting - flat lines at large >negative numbers. (This is a small enough network that I can make sure >there is more or less nothing else happening when I try to FTP something.) > >I got conflicting suggestions from a couple people about whether to use full >or half-duplex. The device defaults to half-duplexing, which seems to be >correct for a hub (the two machines do not have the switch between them as >they are both on the 100Mb segment). I'm not too concerned about 50Mb vs. >100Mb, or even 10Mb vs. 100Mb - I'm getting barely 100kilobits. Three >orders of magnitude difference. But uploading to the BSD machine goes full >speed. (For the record, ifconfig and the hub blinkies agree that I have a >100Mb link.) > >Looking at netstat -i, I see that I'm getting Oerrs of about 15% of Opkts, >but no Ierrs. There is an inconsequential number of collisions. Perhaps >the error rate is to blame for the problem. What sorts of things do these >errors represent? You shouldn't be getting any output errors - that is definately indicating a problem. Have you tried replacing the cable? What sort of motherboard is the card plugged into? -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org Creator of high-performance Internet servers - http://www.terasolutions.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message