Re: [DNSOP] Clarifying referrals (#35)

[Andrew Sullivan <[e-mail]>]

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"?  

Best regards,

A

> > On 29 Nov 2017, at 1:03 pm, Andrew Sullivan <[e-mail]> 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
[e-mail]