Re: [DNSOP] BCP on rrset ordering for round-robin? Also head's up on bind 9.12 bug (sorting rrsets by default)

Shumon Huque <shuque@gmail.com> Fri, 15 June 2018 23:55 UTC

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From: Shumon Huque <shuque@gmail.com>
Date: Fri, 15 Jun 2018 19:54:56 -0400
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To: colm@allcosts.net
Cc: erik+ietf@nygren.org, Bob Harold <rharolde@umich.edu>, "dnsop@ietf.org WG" <dnsop@ietf.org>, Andrew Sullivan <ajs@anvilwalrusden.com>, muks@mukund.org
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Subject: Re: [DNSOP] BCP on rrset ordering for round-robin? Also head's up on bind 9.12 bug (sorting rrsets by default)
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On Fri, Jun 15, 2018 at 5:55 PM Colm MacCárthaigh <colm@allcosts.net> wrote:

>
> Just a question on this: was the old/classic behavior really
> random/shuffled? Or was it that bind would "rotate" through iterations
> where the order was the same each time if you think of the rrset list as a
> ring, but with a different start and end point within that ring? (That's
> what's described here:
> https://docstore..mik.ua/orelly/networking_2ndEd/dns/ch10_07.htm
> <https://docstore.mik.ua/orelly/networking_2ndEd/dns/ch10_07.htm>)
>

ISC veterans can confirm, but my recollection is that the earliest
implementations were indeed as described above - the response RRset was
cycled/rotated, rather than randomized.

Shumon.