From owner-freebsd-net Sun Oct 10 20: 6:56 1999 Delivered-To: freebsd-net@freebsd.org Received: from mail.xmission.com (mail.xmission.com [198.60.22.22]) by hub.freebsd.org (Postfix) with ESMTP id E68BF14D35 for ; Sun, 10 Oct 1999 20:06:52 -0700 (PDT) (envelope-from wes@softweyr.com) Received: from [204.68.178.39] (helo=softweyr.com) by mail.xmission.com with esmtp (Exim 2.12 #2) id 11aVnV-00072g-00; Sun, 10 Oct 1999 21:06:49 -0600 Message-ID: <380121FF.CB92828A@softweyr.com> Date: Sun, 10 Oct 1999 17:32:15 -0600 From: Wes Peters Organization: Softweyr LLC X-Mailer: Mozilla 4.5 [en] (X11; U; FreeBSD 3.1-RELEASE i386) X-Accept-Language: en MIME-Version: 1.0 To: Mohit Aron Cc: freebsd-net@FreeBSD.ORG, justin@apple.com, Alan Cox , wollman@khavrinen.lcs.mit.edu Subject: Re: arp errors on machines with two interfaces References: <199910091650.LAA08261@cs.rice.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Mohit Aron wrote: > > > Garrett is correct, and sarcasm doesn't help. You can't have more > > than one interface on a given wire, with the same subnet address, > > using IP. Them's the protocol rules. > > > > Actually I am using different subnet addresses on the two interfaces. One is > 128.42.3.77 and the other is 192.168.3.77. There are other machines in the dept > running Solaris and other OS's that are connected in similar fashions. > However, the Ethernet is switched and any broadcast by anyone is going to be > seen by all interfaces connected to it. Get a switch that supports Layer 3 VLANs, then the broadcasts from the 192.168 network will not show up on the 128.42 network and vice versa. > I don't have control over the hardware. But here's a possibility - wouldn't > it be better if this error message generation in FreeBSD is turned off if > the packet is an arp broadcast ? Like I showed in my earlier mail, the problem > only happens due to arp broadcasts. Normally you would want to be warned about such things, they are usually a sign of a network misconfiguration. Perhaps a sysctl to turn off these arp warnings would meet your needs? -- "Where am I, and what am I doing in this handbasket?" Wes Peters Softweyr LLC wes@softweyr.com http://softweyr.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message