Re: [v6ops] New draft at dnsop a bis for DNS IPv6 Transport Operational Guidelines

Geoff Huston <gih@apnic.net> Sun, 12 November 2023 04:18 UTC

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From: Geoff Huston <gih@apnic.net>
To: Owen DeLong <owen@delong.com>
CC: Gert Doering <gert@space.net>, list <v6ops@ietf.org>
Thread-Topic: [v6ops] New draft at dnsop a bis for DNS IPv6 Transport Operational Guidelines
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Subject: Re: [v6ops] New draft at dnsop a bis for DNS IPv6 Transport Operational Guidelines
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>>> 
>>> It may not be in the HE RFCs, but I’ve noticed MANY implementations will ask over v4 and v6 for the same resolver query on the first shot, or in some cases a few seconds later, so there is, in fact, happy eyeballs like implementation in the wild even if it isn’t official.
>>> 
>>> Owen
>>> 
>> 
> 


Don’t forget that all this started with the 3901bis draft so we are talking about DNS queries made from recursive to authoritative servers.

So the question is do recursive resolvers perform back-to-back queries in V4 and V6 for the same query name and query type?

I’ll go look

g