From owner-freebsd-isp Mon Sep 2 23:24:04 1996 Return-Path: owner-isp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id XAA08046 for isp-outgoing; Mon, 2 Sep 1996 23:24:04 -0700 (PDT) Received: from uk1.vbc.net (jdd@uk1.vbc.net [204.137.194.1]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id XAA08040 for ; Mon, 2 Sep 1996 23:24:01 -0700 (PDT) Received: (from jdd@localhost) by uk1.vbc.net (8.7.3/8.7.3) id HAA07097; Tue, 3 Sep 1996 07:23:57 +0100 (BST) Date: Tue, 3 Sep 1996 07:23:57 +0100 (BST) From: Jim Dixon To: "Daniel O'Callaghan" cc: Ulf Zimmermann , Joe Lee , isp@freebsd.org Subject: Re: is subnet #0 available for use? 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, 3 Sep 1996, Daniel O'Callaghan wrote: > > will not allow you to use subnet #0. But FreeBSD will allow you. On Ciscos you > > will need to set an extra parameter. > > You'll also not get gated to work properly with subnet "all zeros" or > subnet "all ones". IF you are interested in gated, that is. The way to > define subnets with the maximum number of hosts is to define them with > 4,8,16,32,64,64,32,16,8,4 hosts, and discard the 4 hosts at each end > (0,1,2,3,252,253,254,255) ? We use gated under FreeBSD and BSD/OS and have no problems with these subnets. We certainly do not discard any groups of 4 hosts. For example, ns.vbc.net is at 194.207.0.1 and the four IP addresses 194.207.1.0 through .3 are used for one of our router ports (.1 is our end of the circuit, .2 the customer end). -- Jim Dixon VBCnet GB Ltd +44 117 929 1316 fax +44 117 927 2015 http://www.uk.vbc.net VBCnet West +1 408 971 2682 fax +1 408 971 2684