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RFC 9975
Title: Clarifications on CDS/CDNSKEY and CSYNC Consistency
Author: P. Thomassen
Status: Proposed Standard
Stream: IETF
Date: May 2026
Mailbox: [email protected]
Pages: 16
Updates: RFC 7344, RFC 7477
Obsoletes: None
I-D Tag: draft-ietf-dnsop-cds-consistency-11.txt
URL: https://www.rfc-editor.org/info/rfc9975
DOI: 10.17487/RFC9975
Maintenance of DNS delegations requires occasional changes of the DS and NS
record sets on the parent side of the delegation. For the case of DS records,
"Automating DNSSEC Delegation Trust Maintenance" (RFC 7344) provides automation
by allowing the child to publish CDS and/or CDNSKEY records holding the
prospective DS parameters that the parent can ingest. Similarly,
"Child-to-Parent Synchronization in DNS" (RFC 7477) specifies CSYNC records to
indicate a desired update of the delegation's NS (and glue) records.
Parent-side entities (e.g., Registries and Registrars) can query these records
from the child and, after validation, use them to update the parent-side
Resource Record Sets (RRsets) of the delegation.
This document specifies under which conditions the target states expressed via
CDS/CDNSKEY and CSYNC records are considered "consistent". Parent-side entities
accepting such records from the child have to ensure that update requests
retrieved from different authoritative nameservers satisfy these consistency
requirements before taking any action based on them.
This document is a product of the Domain Name System Operations Working Group
of the IETF.
This document updates RFCs 7344 and 7477.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
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