Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rutgers!ucla-cs!zen!ucbvax!A.ISI.EDU!LYNCH From: LYNCH@A.ISI.EDU (Dan Lynch) Newsgroups: comp.protocols.tcp-ip Subject: Re: How do you break up a B class number? Message-ID: <8707300156.AA05328@ucbvax.Berkeley.EDU> Date: Wed, 29-Jul-87 21:42:16 EDT Article-I.D.: ucbvax.8707300156.AA05328 Posted: Wed Jul 29 21:42:16 1987 Date-Received: Sat, 1-Aug-87 01:06:53 EDT References: <8707271742.AA26964@hi> Sender: daemon@ucbvax.BERKELEY.EDU Distribution: world Organization: The ARPA Internet Lines: 11 This subnetting stuff can lead to bizzare situations that may sound ok, but give some of the "semi-invisible glue" parts (like gateways, routers, bridges) horrendous headaches. Example: you want a lot of subnets, but you also want One Big One because you have a ton of hosts on "one cable". There is nothing that says you cannot have more than one entwork number on the same "cable"! So break the 16 bits up into 256 nets of 256 hosts and assign 4 of the to the main cable. It's legal , but wil it work!? Dan -------