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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