Date: Sun, 3 Sep 2000 13:50:21 -0700 From: Alfred Perlstein <bright@wintelcom.net> To: Emmanuel Gravel <egravel@earthlink.net> Cc: freebsd-net@FreeBSD.ORG Subject: Re: Increasing network performance Message-ID: <20000903135021.B18862@fw.wintelcom.net> In-Reply-To: <200009030438.VAA24762@avocet.prod.itd.earthlink.net>; from egravel@earthlink.net on Sat, Sep 02, 2000 at 09:44:17PM -0700 References: <200009030438.VAA24762@avocet.prod.itd.earthlink.net>
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* Emmanuel Gravel <egravel@earthlink.net> [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
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