From owner-freebsd-net@FreeBSD.ORG Mon Jan 5 11:40:22 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 36EEF16A4CE for ; Mon, 5 Jan 2004 11:40:22 -0800 (PST) Received: from ganymede.hub.org (u46n208.hfx.eastlink.ca [24.222.46.208]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1F2F843D31 for ; Mon, 5 Jan 2004 11:40:21 -0800 (PST) (envelope-from scrappy@hub.org) Received: by ganymede.hub.org (Postfix, from userid 1000) id 5F41135E1F; Mon, 5 Jan 2004 15:36:43 -0400 (AST) Received: from localhost (localhost [127.0.0.1]) by ganymede.hub.org (Postfix) with ESMTP id 4DF0D35C83; Mon, 5 Jan 2004 15:36:43 -0400 (AST) Date: Mon, 5 Jan 2004 15:36:43 -0400 (AST) From: "Marc G. Fournier" To: Luigi Rizzo In-Reply-To: <20040104232515.A49878@xorpc.icir.org> Message-ID: <20040105153544.W28998@ganymede.hub.org> References: <20040104162220.S28998@ganymede.hub.org> <20040104231252.GA71628@pit.databus.com> <20040104232515.A49878@xorpc.icir.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: Barney Wolff cc: freebsd-net@freebsd.org Subject: Re: Odd behaviour on em0 device in -stable ... I think ... X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Jan 2004 19:40:22 -0000 On Sun, 4 Jan 2004, Luigi Rizzo wrote: > i am partly lost on the details of your specific question, but > the symptoms do seem to suggest a stale ARP entry, which must be > in the router (if the switch had a stale entry in its MAC forwarding > table, you would have problems even with local pings, not only > remote ones). > > It is the OS that generates a gratuitous ARP every time you assign > an IP address (or alias) to a card, though i am not sure if it > sends one for each address assigned to the card, or just one for the > newly configured address -- the latter would not solve your problem. One of the odd things I'm finding with the em0 device, over the fxp0 device on the other machines, is that if/when I do alias (or -alias), the network hangs for a couple of seconds, and the following gets generated in /var/log/messages: Jan 4 16:09:17 neptune /kernel: em0: Link is up 100 Mbps Full Duplex as if it brought the device down, and then back up again ... is that normal? ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664