Re: [Last-Call] DDR A/AAAA fallback RE: [Add] Last Call: <draft-ietf-add-dnr-09.txt> (DHCP and Router Advertisement Options for the Discovery of Network-designated Resolvers (DNR)) to Proposed Standard

Tommy Pauly <tpauly=40apple.com@xxxxxxxxxxxxxx> · Wed, 29 Jun 2022 07:55:14 -0700

Thanks, Med.
To be clear, what is the question about A/AAAA fallback? If you only have an ADN, and you thus don’t have information about which encrypted DNS protocol (or the protocol details) until you do an SVCB query for the name, you will need to do the DDR query for the SVCB record to get the information.

I suppose nothing stops the client from just assuming that the support is DoT or DoH with the common URI template and trying to connect anyhow, but if that’s a strategy we’d want to suggest, I think that belongs more in DNR than DDR, since it’s specific to a case where the DNR information only contains a name, and then is about clients using something other than DDR to actually connect to the resolver.

Best,
Tommy

On Jun 29, 2022, at 4:26 AM, mohamed.boucadair@xxxxxxxxxx wrote:

Hi Martin,

(updating the subject so that this can be tracked by DDR authors).

I left that unanswered in my previous reply because I think this is a question for DDR, not DNR. 

Thanks. 

Cheers,
Med

-----Message d'origine-----
De : Martin Thomson <mt@xxxxxxxxxxxxxx>
Envoyé : mercredi 29 juin 2022 02:50
À : BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@xxxxxxxxxx>;
add@xxxxxxxx; last-call@xxxxxxxx
Objet : Re: [Last-Call] [Add] Last Call: <draft-ietf-add-dnr-
09.txt> (DHCP and Router Advertisement Options for the Discovery
of Network-designated Resolvers (DNR)) to Proposed Standard

Thanks for the response Med.

...

You missed this piece:

Do you have an A/AAAA fallback?

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