Re: [cobalt-users] RAQ550 Secondary/backup DNS

[Gerald Waugh <gwaugh@xxxxxxxxxxxxxxxxxxxxxxx>]

On Tue, 29 Jul 2003, Martin Stacey wrote:
>
> This first bit I can do
>
> Raq 550 #1 is NS1.domain.com  providing DNS for all domains hosted on it
> Raq 550 #2 is NS2.domain.com  providing DNS for all domains hosted on it
>
> Q1.
> How do I set up RAQ #3 as a secondary DNS server such that is Raq #1 or
> #2 goes down the domain name will be resolved even if the web site is
> down.

  Enter a record for each domain from both RaQs in RaQ#3
  You want "Secondary Nameservice for Domain"
  Or if RaQ#3 is a 550 then you want to edit "secondary Services"
  and add "Secomdary Service for Domain"

  You also have to setup RaQ#1 and 2 to have SOA records
  that indicate the secondary namserver
  "Modify SOA"

> Q2.
> Is it possible to set up the RAQ 550's such that
>
> Raq#1 hosts all  the websites
> Raq#2 hosts a duplicate of all web sites
>
> Raq#3 provides the DNS services such that normally it points to Raq#1
> but if Raq#1 fails it points to Raq#2

  This is not easy to do and the best way if
  these RaQs in the same datacenter, is to setup
  a router that will monitor operation and
  reconfigure the routing table when one goes down.

Gerald
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