From owner-freebsd-questions Wed Sep 18 04:01:42 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id EAA04352 for questions-outgoing; Wed, 18 Sep 1996 04:01:42 -0700 (PDT) Received: from postie.das.gov.au (postie.das.gov.au [147.211.53.231]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id EAA04326 for ; Wed, 18 Sep 1996 04:01:36 -0700 (PDT) Received: from mailhost.epoch.com.au (test.itsb.das.gov.au [168.198.73.10]) by postie.das.gov.au (8.7.3/8.7.3) with ESMTP id VAA18352; Wed, 18 Sep 1996 21:04:01 +1000 (EST) Received: from toad (remote.itsb.das.gov.au [168.198.73.1]) by mailhost.epoch.com.au (8.6.12/8.6.12) with SMTP id VAA08177; Wed, 18 Sep 1996 21:03:17 +1000 Message-Id: <2.2.32.19960918110648.00990408@mailhost.epoch.com.au> X-Sender: heagre@mailhost.epoch.com.au X-Mailer: Windows Eudora Pro Version 2.2 (32) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 18 Sep 1996 21:06:48 +1000 To: David Nugent From: Greg Healy Subject: Re: Subnetting Cc: Ben Black , FreeBSD-questions Mailing List Sender: owner-questions@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk At 02:33 18/09/96 +0000, David Nugent wrote: >On Tue, 17 Sep 1996, Ben Black wrote: > >>http://www.jensen.com/subnet/ > >(Good, useful page - thanks Ben) > >Which prompts my next question, since this is going to take a >little dns reorganisation to simplify... > >Is there any way - other than using ip aliases on the machines in >question (a couple of them simply don't have that capability >since they're running relatively dumb operating systems) - of >"remapping" an incoming packet from one IP address to another? >This would only be for a few days, until the dns updates >propogates. > If you have the leadtime why don't you reduce the DNS ttl's for those hosts or the whole domain. This will increase the load on the authoritive DNS systems, but for a few days of transition ..... Most of the Australian DNS servers will/should be configured to have a forwarder entry to 139.130.4.4 anyway so a lower ttl (the default is normally 1 day or 86400 seconds) would cause uneeda.aarnet.edu.au to resolve more often. Greg -- Greg Healy ghealy@bimberi.com.au Bimberi Systems Network Consultancy Mobile +61 419 401 747 FAX +61 6 291 4818