From owner-freebsd-isp Tue Mar 25 19:43:00 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id TAA11251 for isp-outgoing; Tue, 25 Mar 1997 19:43:00 -0800 (PST) Received: from panda.hilink.com.au (panda.hilink.com.au [203.2.144.5]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id TAA11242 for ; Tue, 25 Mar 1997 19:42:54 -0800 (PST) Received: (from danny@localhost) by panda.hilink.com.au (8.8.5/8.7.3) id OAA23126; Wed, 26 Mar 1997 14:58:16 +1100 (EST) Date: Wed, 26 Mar 1997 14:58:16 +1100 (EST) From: "Daniel O'Callaghan" To: Cassandra Perkins cc: freebsd-isp@FreeBSD.ORG Subject: Re: Subnetting a Class C In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-isp@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Tue, 25 Mar 1997, Cassandra Perkins wrote: > I have a class C address that I'm subnetting into two nets, A and B using > netmask of 255.255.255.128. I now need to assign 32 addresses from my > subnet A block. I would like to place a gateway between those 32 > addresses and my subnet A, to allow for separate management. I know that > I cannot create an uneven subnet, so does anyone have a suggestion on how > I can achieve this separation. Why are you splitting into 2 x 128? Do you really have 128 hosts on the same piece of wire? Basically, if you want to have a subnet of 32 hosts, you *must* split a 128 into 2 x 64, then split one 64 into 2 x 32. You can put two subnets on the same piece of wire, but it is ugly, and packets from one to the other still have to go via a router. Danny