From owner-freebsd-net Sun Sep 3 13:50:29 2000 Delivered-To: freebsd-net@freebsd.org Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20]) by hub.freebsd.org (Postfix) with ESMTP id 467C437B422 for ; Sun, 3 Sep 2000 13:50:23 -0700 (PDT) Received: (from bright@localhost) by fw.wintelcom.net (8.10.0/8.10.0) id e83KoLg23271; Sun, 3 Sep 2000 13:50:21 -0700 (PDT) Date: Sun, 3 Sep 2000 13:50:21 -0700 From: Alfred Perlstein To: Emmanuel Gravel Cc: freebsd-net@FreeBSD.ORG Subject: Re: Increasing network performance Message-ID: <20000903135021.B18862@fw.wintelcom.net> References: <200009030438.VAA24762@avocet.prod.itd.earthlink.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.4i In-Reply-To: <200009030438.VAA24762@avocet.prod.itd.earthlink.net>; from egravel@earthlink.net on Sat, Sep 02, 2000 at 09:44:17PM -0700 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org * Emmanuel Gravel [000902 21:38] wrote: > I have a few machines in network. I'm using FreeBSD as my NAT/firewall. > The NIC's in the FreeBSD box are 3c509B's. It's a P90 with 32 MB of > RAM, and at least double of swap. Not running any caching/proxy servers, > unless you consider NAT as a proxy. > > When exchanging files between my FreeBSD box and others on the > network, and no Internet traffic, at maximum I've seen ~ 250 KB/s > (not quite 2 Mb/s) transfer rates. When I get Internet traffic, the transfer > rate goes way down if I also try to transfer files, and I get strange > behaviour from the network. Traffic happens in bursts, which seem > usually (but not always) disrupted by collisions, and usually there's > a fairly long pause (a few seconds) before traffic starts again. I would > think part of it has to do with the system being dual-homed, with two > 509's, but I'm sure there has to be something to do to improve performance > somehow. Does anyone know where I should look to get my box to > react a little more sanely? If there's anything else you want to know > just ask :) > This sounds an awful lot like your cards aren't negotiating full/half duplex properly, check the manpage for ifconfig and make sure that if you have a hub that it's set to half on all your computers and if it's a switch it should be full-duplex. best of luck, -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] "I have the heart of a child; I keep it in a jar on my desk." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message