DNSOP,
This version of the draft addresses various comments from the Artart, Genart,
and Dnsdir reviewers:
* Artart review: minor editorial clarifications
* Genart review: remove confusing and superfluous section
references.
* Genart review: clarify resolution failure caching time range.
* Genart review: better define DNS transports
* Dnsdir review: clarify FORMERR response retries.
DW
> On Aug 22, 2023, at 4:47 PM, internet-dra...@ietf.org wrote:
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories. This Internet-Draft is a work item of the Domain Name System
> Operations (DNSOP) WG of the IETF.
>
> Title : Negative Caching of DNS Resolution Failures
> Authors : Duane Wessels
> William Carroll
> Matthew Thomas
> Filename : draft-ietf-dnsop-caching-resolution-failures-07.txt
> Pages : 19
> Date : 2023-08-22
>
> Abstract:
> In the DNS, resolvers employ caching to reduce both latency for end
> users and load on authoritative name servers. The process of
> resolution may result in one of three types of responses: (1) a
> response containing the requested data; (2) a response indicating the
> requested data does not exist; or (3) a non-response due to a
> resolution failure in which the resolver does not receive any useful
> information regarding the data's existence. This document concerns
> itself only with the third type.
>
> RFC 2308 specifies requirements for DNS negative caching. There,
> caching of type (1) and (2) responses is mandatory and caching of
> type (3) responses is optional. This document updates RFC 2308 to
> require negative caching for DNS resolution failures.
>
> RFC 4035 allows DNSSEC validation failure caching. This document
> updates RFC 4035 to require caching for DNSSEC validation failures.
>
> RFC 4697 prohibits aggressive requerying for NS records at a failed
> zone's parent zone. This document updates RFC 4697 to expand this
> requirement to all query types and to all ancestor zones.
>
> The IETF datatracker status page for this Internet-Draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dnsop-caching-resolution-failures/
>
> There is also an htmlized version available at:
> https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-caching-resolution-failures-07
>
> A diff from the previous version is available at:
> https://author-tools.ietf.org/iddiff?url2=draft-ietf-dnsop-caching-resolution-failures-07
>
> Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts
>
>
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