From owner-freebsd-chat Mon Jan 19 08:52:50 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id IAA14900 for chat-outgoing; Mon, 19 Jan 1998 08:52:50 -0800 (PST) (envelope-from owner-freebsd-chat@FreeBSD.ORG) Received: from icicle.winternet.com (adm@icicle.winternet.com [198.174.169.13]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id IAA14888 for ; Mon, 19 Jan 1998 08:52:35 -0800 (PST) (envelope-from mestery@mail.winternet.com) Received: (from adm@localhost) by icicle.winternet.com (8.8.8/8.8.8) id KAA17141 for ; Mon, 19 Jan 1998 10:52:32 -0600 (CST) Received: from tundra.winternet.com(198.174.169.11) by icicle.winternet.com via smap (V2.0) id xma016978; Mon, 19 Jan 98 10:51:41 -0600 Received: from localhost (mestery@localhost) by tundra.winternet.com (8.8.7/8.8.4) with SMTP id KAA23435 for ; Mon, 19 Jan 1998 10:51:40 -0600 (CST) X-Authentication-Warning: tundra.winternet.com: mestery owned process doing -bs Date: Mon, 19 Jan 1998 10:51:40 -0600 (CST) From: Kyle Mestery To: freebsd-chat@FreeBSD.ORG Subject: Link light on ethernet cards 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 I have a question related to ethernet links that I thought someone on this list might know. When you plug an RJ45 link into a hub, what makes the link light come on? Is it something to do with the physical layer, or the MAC chip, or what? I was just curious as to how the link light determines a link has been established. Thanks. Kyle Mestery StorageTek's Network Systems Group 7600 Boone Ave. N., Minneapolis, MN 55428 mesteka@anubis.network.com, mestery@winternet.com FreeBSD hope.winternet.com 3.0-CURRENT FreeBSD 3.0-CURRENT #0: Thu Dec 11 21:35:02 CST 1997 mestery@hope.winternet.com:/usr/src/sys/compile/HOPE i386