From owner-freebsd-net@FreeBSD.ORG Sun May 27 11:08:23 2007 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 02DD116A47E for ; Sun, 27 May 2007 11:08:22 +0000 (UTC) (envelope-from wilkinsa@obelix.dsto.defence.gov.au) Received: from digger1.defence.gov.au (digger1.defence.gov.au [203.5.217.4]) by mx1.freebsd.org (Postfix) with ESMTP id 2DA2C13C483 for ; Sun, 27 May 2007 11:08:21 +0000 (UTC) (envelope-from wilkinsa@obelix.dsto.defence.gov.au) Received: from ednmsw510.dsto.defence.gov.au (ednmsw510.dsto.defence.gov.au [131.185.68.11]) by digger1.defence.gov.au (8.13.8/8.13.8) with ESMTP id l4RAwbvQ012524 for ; Sun, 27 May 2007 20:28:37 +0930 (CST) Received: from ednex510.dsto.defence.gov.au (ednex510.dsto.defence.gov.au) by ednmsw510.dsto.defence.gov.au (Clearswift SMTPRS 5.2.5) with ESMTP id ; Sun, 27 May 2007 20:38:15 +0930 Received: from obelix.dsto.defence.gov.au ([203.6.60.208]) by ednex510.dsto.defence.gov.au with Microsoft SMTPSVC(6.0.3790.1830); Sun, 27 May 2007 20:38:14 +0930 Received: from obelix.dsto.defence.gov.au (localhost [127.0.0.1]) by obelix.dsto.defence.gov.au (8.13.8/8.13.8) with ESMTP id l4RB7l2J080003; Sun, 27 May 2007 19:07:47 +0800 (WST) (envelope-from wilkinsa@obelix.dsto.defence.gov.au) Received: (from wilkinsa@localhost) by obelix.dsto.defence.gov.au (8.13.8/8.13.8/Submit) id l4RB7fda080002; Sun, 27 May 2007 19:07:41 +0800 (WST) (envelope-from wilkinsa) Date: Sun, 27 May 2007 19:07:41 +0800 From: "Wilkinson, Alex" To: freebsd-net@freebsd.org, Andrei Manescu Message-ID: <20070527110741.GC78927@obelix.dsto.defence.gov.au> Mail-Followup-To: freebsd-net@freebsd.org, Andrei Manescu References: <000e01c79f03$b2cfce70$5501a8c0@ivorde> <08556012-CA57-4B2A-A142-F5C1BC8D9009@mac.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <08556012-CA57-4B2A-A142-F5C1BC8D9009@mac.com> Organisation: Defence Science Technology Organisation User-Agent: Mutt/1.5.15 (2007-04-06) X-OriginalArrivalTime: 27 May 2007 11:08:15.0093 (UTC) FILETIME=[52892A50:01C7A04F] X-TM-AS-Product-Ver: SMEX-7.0.0.1526-3.6.1039-15198.001 X-TM-AS-Result: No--1.092000-8.000000-31 Content-Transfer-Encoding: 7bit Cc: Subject: Re: two public ip addresses on one interface 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: Sun, 27 May 2007 11:08:23 -0000 0n Fri, May 25, 2007 at 01:17:39PM -0700, Chuck Swiger wrote: > If your aliases are part of the same subnet as the "primary" or first configured IP, then you want to > use the all-1's netmask. In your case, however, the second IP is part of a completely different subnet, > and you can (and should) use a /24 netmask.... I have always wondered why we need to use the "all-1's" netmask. Why is this ? -aW IMPORTANT: This email remains the property of the Australian Defence Organisation and is subject to the jurisdiction of section 70 of the CRIMES ACT 1914. If you have received this email in error, you are requested to contact the sender and delete the email.