From owner-freebsd-questions@FreeBSD.ORG Thu Sep 15 15:07:14 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 0454716A41F for ; Thu, 15 Sep 2005 15:07:14 +0000 (GMT) (envelope-from e.schuele@computer.org) Received: from sccrmhc12.comcast.net (sccrmhc12.comcast.net [204.127.202.56]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9F65E43D49 for ; Thu, 15 Sep 2005 15:07:13 +0000 (GMT) (envelope-from e.schuele@computer.org) Received: from [208.206.151.59] (host59.gtisd.com[208.206.151.59]) by comcast.net (sccrmhc12) with ESMTP id <2005091515071101200m6utce>; Thu, 15 Sep 2005 15:07:11 +0000 Message-ID: <43298E1D.8090006@computer.org> Date: Thu, 15 Sep 2005 10:07:09 -0500 From: Eric Schuele User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050908) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Grant Peel References: <014f01c5b945$65df9280$6501a8c0@GRANT> In-Reply-To: <014f01c5b945$65df9280$6501a8c0@GRANT> Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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: Thu, 15 Sep 2005 15:07:14 -0000 Grant Peel wrote: > 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. Google CIDR IP Netmask IP broadcast HTH. > > 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. > > 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" > -- Regards, Eric