From owner-freebsd-isp Fri Aug 21 20:27:20 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id UAA17322 for freebsd-isp-outgoing; Fri, 21 Aug 1998 20:27:20 -0700 (PDT) (envelope-from owner-freebsd-isp@FreeBSD.ORG) Received: from buddy.palomine.net (buddy.palomine.net [205.198.88.50]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id UAA17316 for ; Fri, 21 Aug 1998 20:27:18 -0700 (PDT) (envelope-from cjohnson@palomine.net) Received: (qmail 22017 invoked by uid 500); 22 Aug 1998 03:26:30 -0000 Message-ID: <19980821232629.A21999@palomine.net> Date: Fri, 21 Aug 1998 23:26:29 -0400 From: Chris Johnson To: isp@FreeBSD.ORG, jack@germanium.xtalwind.net Subject: Re: [Q] what happens when 1 of N nameservers dies? References: <199808212326.QAA13587@hub.freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1 In-Reply-To: ; from jack on Fri, Aug 21, 1998 at 08:04:48PM -0400 Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Fri, Aug 21, 1998 at 08:04:48PM -0400, jack wrote: > Looking at a `typical' whois listing :) > > germanium# whois freebsd.org > > [snip] > > Domain servers in listed order: > > WHO.CDROM.COM 204.216.27.3 > NS1.CRL.COM 165.113.1.36 > NS2.CRL.COM 165.113.1.37 > NS1.IAFRICA.COM 196.7.0.139 > NS2.IAFRICA.COM 196.7.142.133 > > WHO.CDROM.COM is configured as the primary server for the domain, > all others are configured as secondary servers. > > When a DNS server at someother.domain wants to find > www.freebsd.org's IP address it will first query WHO.CDROM.COM, > if that fails it will try NS1.CRL.COM, if that also fails it will > try NS2.CRL.COM, if that fails ..... That's not the case. To the outside world, all listed name servers are considered equal -- there's no concept of primary and secondary. Primariness and secondariness matter only to the administrator: a primary is where the data live, and secondaries load their data from a primary. Any listed name server is considered to be as authoritative as any other. In BIND 8.1.x, they're not even called primary and secondary any more -- they're called master and slave, probably to avoid this confusion. In the case of FreeBSD.org, the SOA shows that the primary name server is implode.root.com, which isn't even listed as a name server for the domain. So all of the listed name servers are secondaries (or slaves). Chris To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message