Re: [DNSOP] A new version of mixfr

[Matthijs Mekking <[e-mail]>]

Pieter,

On 03/28/2018 04:43 PM, Pieter Lexis wrote:
> Hi Matthijs,
> 
> On Wed, 28 Mar 2018 15:31:57 +0200
> Matthijs Mekking <[e-mail]> wrote:
> 
>> It's been a while, but I have put up a new version of the MIXFR draft:
>>
>>       https://tools.ietf.org/html/draft-mekking-mixfr-02
> 
> The draft speaks of an OPCode in the IANA section and of a meta
> RRType in the examples and Introduction section, which is it?

Probably copy paste error from a different draft. MIXFR is a new query 
type, so that's an error in the IANA section. The intention is to 
request a new RRtype. Thanks for catching this.


> If it is an RRType, some words need to be added about the fact that
> current resolvers will pass through the MIXFR query and not reply with
> NOTIMPL. In a similar vein, unaware auths will respond with an NXDOMAIN
> or (more likely) a NODATA in that case.

IXFR solved this by saying "If the query type is not recognized by the 
server, an AXFR (preceded by a UDP SOA query) should be tried, ensuring 
backward compatibility." Probably MIXFR can say something similar.

A resolver should behave similar for MIXFR as it does for AXFR and IXFR. 
I can't find words about this in RFC 1995 or RFC 5936, so I am not sure 
if this document should add something about that.


Groeten,

Matthijs

> 
> Best regards,
> 
> Pieter
>