<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2653.12"> <TITLE>Re: [lir-wg] Reserved addresses</TITLE> </HEAD> <BODY> >In a current project a number of addresses is needed for closed IP >communication between a number of institutions. That is an internetwork, often called an internet. The Internet Protocol (IP) was invented specifically for this purpose. >The logical choice for >this is some RFC1918-space, but certain people fear that no matter what >1918-addresses we may choose they may be in use internally in the involved >networks and thus unavailable to this project. Those people are right. The logical choice for IP addresses on an internet is to use addresses from the RIR. It doesn't matter whether this internet is connected to the Internet or not. >Someone else, however, picked up on the fact that there's a large number >of addresses just marked "reserved" by IANA, and they probably are not in >use, so why don't we just grab e.g. 82.0.0.0/8? Because all of the organizations in your internet will also be connected to the Internet as well. When the 82/8 space starts to be used on the Internet, each organization will have to deal with routing and/or reachability issues in their internal networks. In order to avoid this kind of mess, the IETF set up the IANA so that organizations building TCP/IP networks could register for globally unique IP addresses. Even though the mechanisms have changed since then (CIDR and the RIRs) the basic principle still holds. There is no requirement that an organization must allow everyone to access their network in order to justify globally registered IP space. It is better for you to register the number of addresses that you actually need rather than hijack the entire 82/8 range. -- Michael Dillon #*************************************************************************** # # Dit e-mailbericht met eventuele attachments is uitsluitend bestemd voor de # geadresseerde(n) en bevat mogelijk vertrouwelijke gegevens en/of is # beschermd door intellectuele eigendomsrechten. Bent u niet de # geadresseerde, neemt u dan zo spoedig mogelijk contact op met de afzender # en verzoeken wij u het e-mailbericht en eventuele attachments van uw # computer te verwijderen. Elk gebruik van de inhoud van dit e-mailbericht # en eventuele attachments (waaronder verveelvoudiging, verspreiding of het # anderzins openbaar maken in welke vorm dan ook) door andere personen dan # de bedoelde geadresseerden is verboden. De weergegeven mening is puur # persoonlijk en hoeft niet noodzakelijk over een te komen met die van # Enertel. Enertel is niet aansprakelijk voor de inhoud van dit # e-mailbericht en eventuele attachments. </BODY> </HTML>