Re: Resilient DNS

In article <bb0966$1k12$1@xxxxxxxxxxx>, Cody <gaylegs@xxxxxxxxxxx> wrote:
>OK, so I have thought about this some more and based upon your answers
>(excuse the 404 bit.. I didn't mean 404 errors), I ahve come up with
>the following.
>
>1) I change my domain at the top level to have 2 nameservers, each
>with a TTL set of 300 (5 minutes)
>2) nameserver 1 is in data centre A and resolves to webserver A
>3) nameserver 2 is in data centre B and resolves to webserver A
>
>In the event of a failure in datacentre A I configure DNS on
>nameserver 2 to point to webserver B. This means a maximum of 5
>minutes outage whilst the TTLs expire.
>
>When webserver A returns to service, I change nameserver 2 to point
>back at it.
>
>Have I got it ?

Yes, this should work.

-- 
Barry Margolin, barry.margolin@xxxxxxxxxx
Level(3), Woburn, MA
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