Re: [DNSOP] draft-moura-dnsop-negative-cache-loop

"Giovane C. M. Moura" <giovane.moura@sidn.nl> Wed, 10 November 2021 09:35 UTC

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From: "Giovane C. M. Moura" <giovane.moura@sidn.nl>
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Date: Wed, 10 Nov 2021 10:35:45 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/K7G37-_90rN0KADLh8vqUKcgB8c>
Subject: Re: [DNSOP] draft-moura-dnsop-negative-cache-loop
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Thanks Ralf,

> I fully agree here. Most of the current or older implementations
> solve this by resource limiting and had no problem with tsuName. Only
> some new cloud implementations had a problems. So please don’t
> require those that had working mitigations to change them.

Well, not only cloud implementations: we found 34 ASes that had issues
-- but again that is limited by our vantage points (sinkhole & ripe atlas).


>> An additional nitpick: I think section 4.  New requirement sound
>> avoid term "negative" caching. In my eyes it is a bit misleading
>> because "negative" is typically used for different kinds of
>> answers.
> Maybe failed resolution caching is a better term here.

Sure, will work on that.

Thanks Ralf,

/giovane