From owner-freebsd-net Thu Jan 2 7:21:33 2003 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 5D55237B401 for ; Thu, 2 Jan 2003 07:21:31 -0800 (PST) Received: from snowflake.hexanet.fr (snowflake.hexanet.fr [81.23.32.32]) by mx1.FreeBSD.org (Postfix) with ESMTP id 404FB43EA9 for ; Thu, 2 Jan 2003 07:21:30 -0800 (PST) (envelope-from y.grossel@hexanet.fr) Received: from snowflake (snowflake [127.0.0.1]) by snowflake.hexanet.fr (Postfix) with SMTP id 6A36111E9; Thu, 2 Jan 2003 16:21:29 +0100 (CET) Date: Thu, 2 Jan 2003 16:21:29 +0100 From: =?ISO-8859-1?Q?=E9=E9?= Yann GROSSEL =?ISO-8859-1?Q?=E9=E9=E9?= To: Fernando Schapachnik Cc: freebsd-net@freebsd.org Subject: Re: Routing and Zebra Message-Id: <20030102162129.3fd99449.y.grossel@hexanet.fr> In-Reply-To: <20030102144911.GG250@bal740r0.mecon.gov.ar> References: <20030102144911.GG250@bal740r0.mecon.gov.ar> Organization: Hexanet X-Mailer: Sylpheed version 0.8.8 (GTK+ 1.2.10; i386-debian-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Thu, 2 Jan 2003 11:49:11 -0300 Fernando Schapachnik wrote: > Hi, > First of all, forgive me if my question is off-topic. I could have > tried -questions but was afraid that is was kind of very specific. > > To the point: Two machines running 4.7, A and B, connected to the > same > switch. Both running zebra. When A is turned off, B receives A's traffic > (which is normal as the switch needs to flood packets after a while): > > TCPdump on B: > > Source MAC: a router's MAC (on the same LAN) > Dest. MAC: A's MAC > Source IP: someplace in the net > Dest. IP: A's IP > > To my surprise B tries to forwards the packet to A, which AFAIK > shouldn't because it doesn't have the right destination MAC. Of course > there is no VRRP or anything else. > > Is this a known behavior? Would it be Zebra? > > Thanks in advance for any help! Hi, I posted a few hours ago in freebsd-questions a problem that seems very similar to yours ("promiscuous mode / strange ethernet packets duplication problem"). I too have Zebra running on my machines. Have you checked that the ethernet interface of your B machine is not in promiscuous mode for an unknown reason ? We have several FreeBSD 4.7 boxes that automatically put all their interfaces into promiscuous mode during the boot process. Does anybody knows how to prevent that from happening ? Regards Yann -- Yann GROSSEL Email: y.grossel@hexanet.fr HEXANET NOC URL: http://www.hexanet.fr/ Tel: +33 (0)3 26 79 30 05 Fax: +33 (0)3 26 79 30 06 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message