Search Again: Re: Best way to share multiple links to the net? From: Men & Mice Support Date: Thursday, March 13, 2003 Time: 12:58:41 am Let me try to clarify the issues involved. You're asking about web service, not so much about DNS service, right? You want to use DNS to solve the problem for web service, as I see it. Solution: Yes, set your web/mail/other-non-DNS servers to have one IP on each subnet. Put one DNS server on each subnet. (You could use more than one for each subnet, but that might be overkill.) Make each DNS server a master server for your zones. Don't edit them together with QuickDNS 3.x or above - edit data on each server separately. On each server, for the web service, list only the same web server IP address as that DNS server is on. For DNS and mail services, list both. So, more concretely: You have link A and link B. You have a web server with IP address A and IP address B. You have two DNS servers, DNS A and DNS B. On DNS A, the record for web service points to IP address A. On DNS B, the record for web service points to IP address B. If link A goes down, the DNS servers of the world will only find DNS B, thus only finding IP address B for web service. Have I answered the question clearly? I hope so. This is an easy solution once you grok it. To answer your other question: DNS clients (or rather the web browsers and FTP clients that use them) are not smart enough to try both IP addresses. ____________________________________________________________________ Chris Buxton Men & Mice support@menandmice.com Making DNS Easy At 7:19 PM -0500 3/12/03, Robert Woodhead wrote: >I currently have two links to the net in my office (wireless ISP and >DSL), each with their own set of IP addresses. > >I want to configure the publically available servers so that, as >much as possible, they share the two links. > >My idea is to assign an IP from each set to each server, so each >server has two IP addresses it responds to (using IP multihoming >that OT will do under OS 9, for example). > >The question is, how to configure DNS so that requests come in from >both pipes. Something simple like 2 A records would apparently >implement round-robin (so far, so good), but what happens when one >of the pipes goes down? Are DNS clients smart enough to try both >IPs? > >Or is there a better solution to this? > >Best > >R >-- > >=========================================================== >Robert Woodhead, CEO, AnimEigo http://www.animeigo.com/ >=========================================================== >http://selfpromotion.com/ The Net's only URL registration >SHARESERVICE. A power tool for power webmasters.

Messages In This Thread: Best way to share multiple links to the net? by Robert Woodhead on Mar 12, 2003 at 4:46:17 pm Re: Best way to share multiple links to the net? by Ryan Salazar on Mar 12, 2003 at 4:52:06 pm Re: Best way to share multiple links to the net? by Len Conrad on Mar 12, 2003 at 5:07:23 pm Re: Best way to share multiple links to the net? by Men & Mice Support on Mar 13, 2003 at 12:58:41 am Re: Best way to share multiple links to the net? by Robert Woodhead on Mar 13, 2003 at 1:32:19 pm Re: Best way to share multiple links to the net? by Men & Mice Support on Mar 13, 2003 at 8:39:43 pm