Re: [core] New Version Notification for draft-lenders-dns-over-coap-04.txt

[Carsten Bormann <[e-mail]>]

Hi Martine,

On 2022-07-11, at 12:47, Martine Sophie Lenders <[e-mail]> wrote:
> 
> We have published a new version of our DNS over CoAP draft. The most important changes are:
> 
> - We addressed a lot of TBDs and most are now either done or became moot.
> - We removed all obvious CoAP behavior restatements.
> 
> A detailed listing of all changes can be found in Appendix A.1 of the draft [1].

thank you!

I wonder if we can get a bit more specific about the new Section 5.2, which I copy here:

5.2.  Observing the DNS Resource

   There are use cases where updating a DNS record might be necessary on
   the fly.  Examples of this include e.g.  [RFC8490], Section 4.1.2,
   but just saving messages by omitting the query for a subscribed name
   might also be valid.  As such, the DNS resource MAY be observable as
   specified in [RFC7641].

What would be great at this point is a couple of examples that show how to use CoAP observe in one of the settings where it is a natural fit, whether that is for a situation where port53 DNS would use RFC 8490 “long-poll” or RFC 8765 “DNS push”.

Discussing these examples here on the mailing list would be a good preparation to the DNS over CoAP slot at IETF 114.

Grüße, Carsten