From owner-freebsd-hardware Wed Oct 7 22:38:25 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id WAA23258 for freebsd-hardware-outgoing; Wed, 7 Oct 1998 22:38:25 -0700 (PDT) (envelope-from owner-freebsd-hardware@FreeBSD.ORG) Received: from dingo.cdrom.com (castles134.castles.com [208.214.165.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id WAA23253 for ; Wed, 7 Oct 1998 22:38:22 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.9.1/8.8.8) with ESMTP id WAA01244; Wed, 7 Oct 1998 22:43:19 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Message-Id: <199810080543.WAA01244@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: richard@pegasus.com (Richard Foulk) cc: freebsd-hardware@FreeBSD.ORG Subject: Re: Full duplex ethernet In-reply-to: Your message of "Wed, 07 Oct 1998 13:50:18 -1000." <199810072350.NAA20011@pegasus.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 07 Oct 1998 22:43:18 -0700 From: Mike Smith Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > Which ether-card drivers currently support full duplex? de, fxp, tl, xl, tx at least. Basically, the high-performance cards. > Recently, someone here said that full duplex for 10Base-T was a waste > of time. But after some research it's beginning to look like that's > not true at all. > > 10BT switches are available, and cost way less than 100BT switches. > > I've gotten reports from several places saying that in practice, switched > full-duplex 10BT is faster than half-duplex hub-based 100BT. I can produce staistics for just about anything, including a pathalogical case where you may get "better performance" from a 10bT switch than a 100bT hub, but unless you're taking your particular work profile into account, on average you will lose. > Since 100BT switches aren't really affordable yet, full duplex 10BT > sounds like a winner. Less than US$600 for an 8-port 100bT switch, less than US$300 for a 16-port 100bT hub. Be wary of hubs with single switched "server ports". > Do any of the 10/100 cards support full duplex in their 10BT mode? Most if not all, AFAIK. But the cost argument for 10bT just isn't there anymore. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message