What happen with only one DNS instead of two

Mark_Andrews at isc.org Mark_Andrews at isc.org
Sun Jul 14 23:22:20 UTC 2002


> Hi,
> 
> our domain name is only handled by one dns. I mean when we've registered 
> the domain name we have provided a second dns pointing to a non existing IP 
> (we should pay to run a second server for this IP).
> 
> What are the consequences of running only one DNS server for a domain name 
> ?
> 
> Thank you.

	Firstly there is no excuse for not having a secondary server.
	There are plenty sites that off to do it free (some conditionally).

	When your nameserver is down other sites cannot lookup the zones
	served by it.  Some people claim this is not a problem (especially
	when the server is the site) however if everyone did this nameservers
	would be clogged up trying retrieve answers from dead sites.  You
	also need to remember that nameservers are often shared between many
	thousands of clients.

	Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org


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