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Re: [BEHAVE] [DNSOP] [v6ops] New Version Notification for draft-momoka-v6ops-ipv6-only-resolver-00.txt

Mark Andrews <marka@isc.org> Mon, 17 October 2022 02:51 UTC

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From: Mark Andrews <marka@isc.org>
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Date: Mon, 17 Oct 2022 13:51:45 +1100
Cc: Michael Richardson <mcr+ietf@sandelman.ca>, Joe Abley <jabley@hopcount.ca>, dnsop <dnsop@ietf.org>, 6man list <ipv6@ietf.org>, "behave@ietf.org" <behave@ietf.org>, v6ops list <v6ops@ietf.org>
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To: Geoff Huston <gih@apnic.net>
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Subject: Re: [BEHAVE] [DNSOP] [v6ops] New Version Notification for draft-momoka-v6ops-ipv6-only-resolver-00.txt
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> On 17 Oct 2022, at 08:57, Geoff Huston <gih@apnic.net> wrote:
> 
> 
> 
>> On 17 Oct 2022, at 7:53 am, Michael Richardson <mcr+ietf@sandelman.ca> wrote:
>>  I think that's because
>> recursive nameserves effectively have always done an equivalent to "happy
>> eyeballs", so the risk is low.
>> 
> 
> 
> That certainly was not the case in 2015: https://www.potaroo.net/presentations/2015-10-04-dns-dual-stack.pdf
> 
> I have not seen a large scale measurement since then but I suspect that nothing has changed. i.e.: 
> recursive resolvers do not do the equivalent of happy eyeballs behaviour.

BIND doesn’t race queries but it does bias the selection of IPv6 servers over IPv4 servers. This went into BIND 9.11.0.  The CHANGES note was dated 2015-09-28.

4222.   [func]          Bias IPv6 servers when selecting the next server to
                        query. [RT #40836]


-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org

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