From owner-freebsd-net@FreeBSD.ORG Wed May 17 00:40:37 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org 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 2C85716A400 for ; Wed, 17 May 2006 00:40:37 +0000 (UTC) (envelope-from dougb@FreeBSD.org) Received: from mail2.fluidhosting.com (mx21.fluidhosting.com [204.14.89.4]) by mx1.FreeBSD.org (Postfix) with SMTP id 9E8AE43D45 for ; Wed, 17 May 2006 00:40:36 +0000 (GMT) (envelope-from dougb@FreeBSD.org) Received: (qmail 11705 invoked by uid 399); 17 May 2006 00:40:35 -0000 Received: from localhost (HELO ?192.168.0.3?) (dougb@dougbarton.us@127.0.0.1) by localhost with SMTP; 17 May 2006 00:40:35 -0000 Message-ID: <446A70FE.1090807@FreeBSD.org> Date: Tue, 16 May 2006 17:40:30 -0700 From: Doug Barton Organization: http://www.FreeBSD.org/ User-Agent: Thunderbird 1.5.0.2 (X11/20060507) MIME-Version: 1.0 To: Unix-Solutions - Steven References: <001301c67946$604b7f70$aa00000a@cloe> In-Reply-To: <001301c67946$604b7f70$aa00000a@cloe> X-Enigmail-Version: 0.94.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: /31 on 2 interfaces X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 May 2006 00:40:37 -0000 Unix-Solutions - Steven wrote: > Hello, > > I have 2 servers with both 2x 'em' interfaces in it. > I configged a /31 on both interfaces > em0 in box 1 = 10.0.0.1 > em0 in box 2 = 10.0.0.2 That's not a /31, it's the middle two addresses of a /30 (as the end of your message correctly surmised). Here is a hint. Because they use binary math, CIDR blocks always start with an even address, and end with an odd one. hth, Doug -- This .signature sanitized for your protection