From owner-freebsd-chat Mon Jul 19 2: 1:50 1999 Delivered-To: freebsd-chat@freebsd.org Received: from avarice.riverstyx.net (hq-port-97.harbour-dhcp-pool.infinetgroup.com [207.23.37.97]) by hub.freebsd.org (Postfix) with ESMTP id 3000C150BA for ; Mon, 19 Jul 1999 02:01:45 -0700 (PDT) (envelope-from unknown@riverstyx.net) Received: from avarice (unknown@avarice [207.23.37.97]) by avarice.riverstyx.net (8.9.3/8.9.3) with ESMTP id BAA05393; Mon, 19 Jul 1999 01:39:05 -0700 Date: Mon, 19 Jul 1999 01:39:05 -0700 (PDT) From: Tani Hosokawa To: Vincent Poy Cc: David Schwartz , Karl Pielorz , freebsd-chat@FreeBSD.ORG Subject: RE: poor ethernet performance? In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Mon, 19 Jul 1999, Vincent Poy wrote: > On Mon, 19 Jul 1999, David Schwartz wrote: > > > > No... but I'm just saying that cable properties do change over > > > time. When current flows, there is energy build up... > > > > Yes, cable properties change over time, over months or years, sure. As for > > current flowing causing "energy build up", any magnetic field that's going > > to build around an Ethernet cable due to current flowing through it has > > affected the cable's characteristics as much as it is going to in a tiny > > fraction of a second. > > > > An Ethernet cable does not need to 'warm up'. > > I guess you have a point. There isn't a lot of current flowing > through the ethernet cable anyways. I guess what I am saying is that when > you test something and when you use something, it's totally different. > Just like when you test a HD, you know what the max rate is. But that > doesn't mean that's the same in real world use. I guess, but with an ethernet cable tester (assuming he's not just doing a basic connectivity test) it ought to fully simulate sending some basic bit patterns across the cable. That's the way any of the cable diagnostics hardware I've ever worked with did it. And that should be a completely reasonable indication of soundness. --- tani hosokawa river styx internet To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message