[Gllug] RE: [GLUG] BIND NS Order

Jason Clifford jason at ukpost.com
Fri Nov 15 10:34:31 UTC 2002


On Fri, 15 Nov 2002, Neil Fryer wrote:

> What I need to achieve is this, we have an ISP hosting our DNS, now I want
> to make sure that if their DNS servers die, ours will carry the load until
> they come back up, as this morning they have been dropping their pri and sec
> dns servers in a round robin sort of fashion, and I'm getting really worried
> now. As we are currently running a major campaign and the sms's we recieve
> really on DNS heavily.

As you've already been told DNS is generally served in round robin 
fashion.

As a result you are not going to see more than 1/3 of the requests being 
made against your server locally and you wont even see that in reality as 
the records get cached on other name servers thus reducing load.

If DNS is so vital to your business what measures have you taken to handle 
an upstream failure at your ISP?

Jason Clifford
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