nanog mailing list archives

Re: AAAA's for www.netflix.com


From: Mark Andrews <marka () isc org>
Date: Fri, 08 Jun 2012 08:04:12 +1000


In message <20120607165818.GA30416 () srv03 cluenet de>, Daniel Roesen writes:
On Thu, Jun 07, 2012 at 07:52:29AM -0600, Dave Temkin wrote:
Just to close the loop on this - UltraDNS has an issue with CNAMEs and 
their Directional DNS service.  We (Netflix) have applied a workaround and 
it appears stable.

Hm, looking at http://v6launch.ripe.net/, whatever you changed didn't
improve visibility of the AAAA, but decreased it.

TTL's of zero don't help.  The A query has a TTL of 3600 in the
response the AAAA query has a zero TTL.  This is rocket science.
This isn't hard to do correctly.  How to handle CNAMEs has been
specified 1/4 of a century.

Best regards,
Daniel

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Mark Andrews, ISC
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