[DNSOP] BCP 91, RFC 10001 on Operational Guidelines for DNS Transport in Mixed IPv4/IPv6 Environments
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Subject: [DNSOP] BCP 91, RFC 10001 on Operational Guidelines for DNS Transport in Mixed IPv4/IPv6 Environments
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A new Request for Comments is now available in online RFC libraries.
BCP 91
RFC 10001
Title: Operational Guidelines for DNS Transport in Mixed IPv4/IPv6 Environments
Author: Momoka,
T. Fiebig
Status: Best Current Practice
Stream: IETF
Date: August 2026
Mailbox: momoka.my6@gmail.com,
tfiebig@mpi-inf.mpg.de
Pages: 17
Obsoletes: RFC 3901
I-D Tag: draft-ietf-dnsop-3901bis-17
URL: https://www.rfc-editor.org/info/rfc10001
DOI: 10.17487/RFC10001
This document provides guidelines and documents best current practice for operating authoritative DNS servers, recursive resolvers, and stub resolvers in a mixed IPv4/IPv6 environment. This document recommends that both authoritative DNS servers and recursive resolvers support IPv4 and IPv6. It also provides guidance on how recursive DNS resolvers should select upstream DNS servers, including when IPv4-embedded IPv6 addresses are available.
This document obsoletes RFC 3901.
This document is a product of the Domain Name System Operations Working Group of the IETF.
BCP: This document specifies an Internet Best Current Practices for the
Internet Community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
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