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Re: DNS resolver reaction to non-reachable authoritative DNS server
From: Anurag Bhatia <me () anuragbhatia com>
Date: Sat, 15 Mar 2014 01:28:45 +0530

Got it!


Thankyou very much for help. Have a good weekend ahead.


On Fri, Mar 14, 2014 at 6:59 AM, Doug Barton <dougb () dougbarton us> wrote:

On 3/13/2014 5:23 PM, Mark Andrews wrote:

If your customers are using BIND there is a flag you can supply to named
to cause it to operate only in IPv4. That would avoid this problem
altogether.



And is basically not needed as the IP stack (with the exception of
Solaris) informs named when there isn't a route to the destination
and named moves onto the next address to try.


Sure, but by using the flag you skip that step, and the accompanying error
message in the logs.

The fact that this issue has risen to the level of "annoyance" rather than
just "oddity" as it used to be is actually a good thing. It's a sign that
more and more sites are deploying IPv6 for critical infrastructure.

Doug





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Anurag Bhatia
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