From owner-freebsd-hackers Fri Sep 26 23:12:23 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id XAA00848 for hackers-outgoing; Fri, 26 Sep 1997 23:12:23 -0700 (PDT) Received: from GndRsh.aac.dev.com (GndRsh.aac.dev.com [198.145.92.241] (may be forged)) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id XAA00826; Fri, 26 Sep 1997 23:12:17 -0700 (PDT) Received: (from rgrimes@localhost) by GndRsh.aac.dev.com (8.8.5/8.7.3) id XAA19592; Fri, 26 Sep 1997 23:10:25 -0700 (PDT) From: "Rodney W. Grimes" Message-Id: <199709270610.XAA19592@GndRsh.aac.dev.com> Subject: Re: 'fxp' driver/hardware lossage (was Re: Alexander B. Povol's mail) In-Reply-To: <199709270110.SAA01062@implode.root.com> from David Greenman at "Sep 26, 97 06:10:48 pm" To: dg@root.com Date: Fri, 26 Sep 1997 23:10:25 -0700 (PDT) Cc: tlambert@primenet.com, tarkhil@mgt.msk.ru, hackers@FreeBSD.ORG, stable@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL25 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > You can't send a packet to yourself under normal circumstances (ethernet > is a simplex device). Only broken NIC chips are simplex, even the 82586 is actually capable of hering itself talk on the wire, though most drives do not set the chip into this mode. Either way ``ethernet is _not_ a simplex device''. Infact the 82586 has the ability to due cource grain TDR (Time Domain Reflectonmetry) for finding bad coax (thick or thin). -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation, Inc. Reliable computers for FreeBSD