From owner-freebsd-isp Tue Apr 18 22:14:56 2000 Delivered-To: freebsd-isp@freebsd.org Received: from mail.wanlogistics.net (mail.wanlogistics.net [63.209.114.3]) by hub.freebsd.org (Postfix) with ESMTP id 9FBC937BBE6 for ; Tue, 18 Apr 2000 22:14:53 -0700 (PDT) (envelope-from bill@mail.wanlogistics.net) Received: (from bill@localhost) by mail.wanlogistics.net (8.9.3/8.9.3) id BAA01389 for freebsd-isp@freebsd.org; Wed, 19 Apr 2000 01:14:52 -0400 (EDT) (envelope-from bill) Message-Id: <200004190514.BAA01389@mail.wanlogistics.net> Subject: Re: Failover question/hint/idea In-Reply-To: To: freebsd-isp@freebsd.org Date: Wed, 19 Apr 2000 01:14:52 -0400 (EDT) From: bill@bilver.com Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Reply to: bill@bilver.com X-Mailer: ELM [version 2.4ME+ PL61 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sorry for not replying earlier - it was one of those days. Brand new - 14 days old - Cicso 7120 died on me early Tuesday AM. I had said: >> An old client of mine is bringing up a portal site. They current have >> a T1 to their location, but the site is going to be put on a server >> at our co-location facility - which is inside an OC-48 connected facility. > >> They are going to keep theri T1 and the current site as a development >> site, but they want to be able to use that site as a fail-over site >> in case the main site goes down. >... >> I can't t see that the round-robin DNS approach would work, but if the >> primary DNS (located at tha main site) goes down, would that be enough >> to force it to the secondary name server - which I'm thinking could >> point to the backup site. > If by "primary" and "secondary" you mean the normal DNS master and slave > servers (this is the current terminology), it won't work: Actually I was thinking more an an alternate - one listed as secondary but not actually secondary for that one domain. > - The master and the slave(s) are supposed to have the *same* data. The > slave(s) fetch a copy of the zone data from the master. I understand that. I'm sorry for the poor choice of words. I'm usually better at communications than that. :-( > - The "rest of the world" do not differentiate between master and slave > name servers - all they do is choose one of the *authoritative* name > servers. Master and slave(s) are all supposed to be authoritative, of > course. > To put it another way: As seen from the outside, there is no difference > between "primary" and "secondary" name servers! I've seen a commercial product in the Sun arena that appears to be able do this - including round-robin from multiple sites and replacing of failed servers in the series - but I'm trying to find another way to do this to start with. It depends on just how successful the site is. If it takes off then their site on a T1 for backup will only be development and not used as an emergency. Bill -- Bill Vermillion bv@wjv.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message