Re: [DNSOP] new ANAME draft: draft-hunt-dnsop-aname-00.txt

"Peter van Dijk" <peter.van.dijk@powerdns.com> Thu, 13 April 2017 10:54 UTC

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From: "Peter van Dijk" <peter.van.dijk@powerdns.com>
To: dnsop <dnsop@ietf.org>
Date: Thu, 13 Apr 2017 12:54:50 +0200
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Subject: Re: [DNSOP] new ANAME draft: draft-hunt-dnsop-aname-00.txt
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Hello,
On 13 Apr 2017, at 11:53, Lanlan Pan wrote:

> Hi Peter,
>
> one question, will authoritative server return multiple ANAME RRs for 
> the
> same domain at one dns query ?
>
> for example,
>
> www.example.com  ANAME  us.www.example.com
> www.example.com  ANAME  cn.www.example.com
>
> or  return only one selected ANAME RR for one domain ? (based on
> authoritative's policy, resolver ip/client subnet/...)
>
> www.example.com  ANAME  us.www.example.com

Currently the draft explicitly states ‘No more than one ANAME resource 
record SHALL be present at any DNS node.’, but we have received 
multiple requests to relax this requirements, and will consider that.

That said, nothing prevents your own implementation from choosing the 
target based on any kind of local policy. So if you want to pick US or 
CN based on client IP, you can do that.

Kind regards,
-- 
Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/