From owner-freebsd-questions@FreeBSD.ORG Wed Sep 14 16:18:23 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 08CEA16A41F for ; Wed, 14 Sep 2005 16:18:23 +0000 (GMT) (envelope-from jerrymc@clunix.cl.msu.edu) Received: from clunix.cl.msu.edu (clunix.cl.msu.edu [35.9.2.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id A791543D45 for ; Wed, 14 Sep 2005 16:18:22 +0000 (GMT) (envelope-from jerrymc@clunix.cl.msu.edu) Received: from clunix.cl.msu.edu (localhost [127.0.0.1]) by clunix.cl.msu.edu (8.12.10+Sun/8.12.2) with ESMTP id j8EGIMBn005726; Wed, 14 Sep 2005 12:18:22 -0400 (EDT) Received: (from jerrymc@localhost) by clunix.cl.msu.edu (8.12.10+Sun/8.12.2/Submit) id j8EGIMOu005725; Wed, 14 Sep 2005 12:18:22 -0400 (EDT) From: Jerry McAllister Message-Id: <200509141618.j8EGIMOu005725@clunix.cl.msu.edu> To: gpeel@thenetnow.com Date: Wed, 14 Sep 2005 12:18:22 -0400 (EDT) In-Reply-To: <014f01c5b945$65df9280$6501a8c0@GRANT> X-Mailer: ELM [version 2.5 PL7] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: IPs , Netmasks and Broadcast. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Sep 2005 16:18:23 -0000 > > Hi All, > > Now I am really confused. > > Up until this morning I thought I had a good handle on when I need to use > the real Netmask and Broadcast. > > For example, If I have 3 servers, and my upline asigns me a block of 128 > addresses, for the first ip used (from this block) on each server, I would > need to specify the IP, true netmask and a broadcase. Then, when using more > IPs from that block, I would use a 255.255.255.255 netmask and a broadcast > equal to the IP. > > Today, I was in this exact position where I was tring to add an (the first > one one THAT machine, from that block) IP from a block that is almost > completely used up on another server, and the one I was adding it to would > not take it. When I tried adding it with a 255.255.255.255 netmask, and a > broadcast eaqual to the amount of IPs from that block - it worked. I am not sure I follow you correctly, but the way I understand it, on any given server, you would use the "real" netmask for only the first/main IP address. All the rest of the aliases get the full 255 set. It doesn't matter which block of IPs it is from. ////jerry > > this is on a FreeBSD 4.10 machine. > > WHich way is correct for 4.7 and higher? > > -Grant > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >