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Re: [dnsext] RFC3596: A/AAAA records and additional section processing

Colm MacCárthaigh <colm@allcosts.net> Fri, 04 March 2011 07:12 UTC

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From: Colm MacCárthaigh <colm@allcosts.net>
To: Mark Andrews <marka@isc.org>
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Subject: Re: [dnsext] RFC3596: A/AAAA records and additional section processing
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2011/3/3 Mark Andrews <marka@isc.org>:
>> dig AAAA www.google.com @a.root-servers.net.
>>
>> plainly does trigger additional section processing. (though one might
>> argue it was the name, not the type, that pulled the trigger).
>
> No. That is not addition section processing.  That is referral
> processing.
>
> Additional section processing would be returning A and AAAA to
> NS queries.

dig AAAA www.google.com @a.root-servers.net.

and

dig NS www.google.com @a.root-servers.net.

return literally byte-identical responses after the question section.

dig NS com @a.root-servers.net.

too (with EDNS enabled). I find it hard to reason about what the difference is.

-- 
Colm

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