[DNSOP] RFC 9975 on Clarifications on CDS/CDNSKEY and CSYNC Co nsistency

A new Request for Comments is now available in online RFC libraries.

        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.

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