From owner-freebsd-isp Wed Feb 11 23:22:43 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA19055 for freebsd-isp-outgoing; Wed, 11 Feb 1998 23:22:43 -0800 (PST) (envelope-from owner-freebsd-isp@FreeBSD.ORG) Received: from alpha.thebestisp.com (alpha.thebestisp.com [204.220.33.11]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA19049 for ; Wed, 11 Feb 1998 23:22:40 -0800 (PST) (envelope-from joe@thebestisp.com) Received: from subzero.thebestisp.com (subzero.thebestisp.com [204.220.33.178]) by alpha.thebestisp.com (8.8.7/8.8.7) with SMTP id BAA14028 for ; Thu, 12 Feb 1998 01:28:27 -0600 (CST) From: "Joe" To: Subject: Re: Fw: FreeBSD firewall questions Date: Thu, 12 Feb 1998 00:34:51 -0600 Message-ID: <01bd3780$52b0c520$b221dccc@subzero.thebestisp.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.71.1712.3 X-MimeOLE: Produced By Microsoft MimeOLE V4.71.1712.3 Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org well you should try some big transfers ie: 100+megs and see that you will not get any better than maybe 75% even with a high end hub like intels or baystack even there the latency alone would be severly higher that a dcd and you would surelly get more collissions than with a dcd.. and the $40-$60 hubs that SMC/Linksys/etc put out I would be suprised if you get better that 5Mbps but through a switch sure you will push near 10 and with dcd even a POS nic card will get you by at near cap. I do use all intel pro100b nic's and through our local switched network I get solid 90+Mbps throughput. but not through the hubs even the managed baystack that we put out in larger networks only gets 65-70Mbps on a 100Mbps hub and that is due to collisions and the backdown time and latency in general. And some of the baystack 10Mbps push 80% but no better. At any rate take a look at your hubs how many of the that have util. meters go over 60-70%?? and call and ask the manufacturer "What is the best util. I will get?" ask about a 10Mbps because they will want to sell you a 100Mbps.. :-) -----Original Message----- From: Jim Shankland To: joe@thebestisp.com Cc: freebsd-isp@freebsd.org Date: Thursday, February 12, 1998 1:14 AM Subject: Re: Fw: FreeBSD firewall questions > And second [with a hub] you can't expect to get better that 60%(+-) > ie: 6Mbps rather than 10Mbps throughput so you are paying for latency > and collissions.. Woops. Crap detector just went off. You should actually try this out; do your two hosts that get 10 Mb/s throughput on a point-to-point cable get 6 Mb/s throughput when those two hosts (only) are connected through a hub? If so, throw the hub into the trashcan and get another. You're right, though, that a hub is unnecessary to connect two hosts point-to-point. And if the interface cards support it, you can run the point-to-point line in full-duplex; for that matter, with 10/100 cards running $60 or less, at 100 Mb/s. 100 Mb hub and switch prices are dropping fast, but they're not yet down to a trivial level. Jim Shankland Flying Fox Computer Systems, Inc. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message