Re: [DNSOP] Clarifying referrals (#35)

> On 29 Nov 2017, at 11:17 pm, Andrew Sullivan <ajs@anvilwalrusden.com> wrote:
> 
> On Wed, Nov 29, 2017 at 01:14:13PM +1100, Mark Andrews wrote:
>> When the CNAME refers to a name that is out of zone and the target zone is below
>> a zone that the server serves you will have CNAME (DNAME) + referral.
>> 
>> 4.3.2 loops.
> 
> This part I got.
> 
>> 	pass 1 -> 3a  (adds CNAME, AA is set as it matches the question section, QNAME is updated).
> 
> This is the CNAME response, yes, ok.
> 
>> 	pass 2 -> 3b  (we have a partial match with a bottom of zone cut which adds the referral).
>> 
> 
> Right, and the authoritative server can't proceed, but the referral is
> necessary.  Good, this is helpful, thanks.  This also means, of
> course, that in such a response the answer section isn't empty.  Is
> this why you call it a "partial referral”?  

I said “partial answer + referral”, and yes.

> Best regards,
> 
> A
> 
>>> On 29 Nov 2017, at 1:03 pm, Andrew Sullivan <ajs@anvilwalrusden.com> wrote:
>>> 
>>> Hi Mark,
>>> 
>>> On Wed, Nov 29, 2017 at 12:57:26PM +1100, Mark Andrews wrote:
>>>> You can answer only responses, you can have referral only responses,
>>>> you can partial answer + referral responses.
>>> 
>>> Where in the algorithm in section 4.3.2 of 1034 (or other, derived
>>> cases like DNAME) is this "partial answer + referral responses"
>>> described?  If this is well-defined somewhere, I want to refer to it.
>>> If it is not, I wish to describe it clearly, because it seems pretty
>>> obvious given the amount of discussion we've had on this topic that
>>> the notion of referral is nowhere near as clear as people seem to
>>> think it is.  I'm not sure I understand your cryptic remark above, but
>>> I am certain  I can't make it more comprehensible to others without
>>> you telling me that I'm wrong and need to do it over.  So I'm
>>> appealing to you to try to make your view as clear as possible.
>>> 
>>> Best regards,
>>> 
>>> A
>>> 
>> 
> 
> -- 
> Andrew Sullivan
> ajs@anvilwalrusden.com
> 
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-- 
Mark Andrews, ISC
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