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RFC 9762: Using Router Advertisements to Signal the Availability of DHCPv6 Prefix Delegation to Clients

In plain English — editorial summary, not part of the RFC

This document defines the P flag in the Prefix Information Option (PIO) of IPv6 Router Advertisements (RAs). The flag is used to indicate that the network prefers that clients use the deployment model in RFC 9663 instead of using individual addresses in the on-link prefix assigned using Stateless Address Autoconfiguration (SLAAC) or DHCPv6 address assignment. This document updates RFC 4862 to indicate that the Autonomous flag in a PIO needs to be ignored if the PIO has the P flag set. It also updates RFC 4861 to specify that the P flag indicates DHCPv6 prefix delegation support for clients.

Document record

Document ID
RFC9762
Published
June 2025
Authors
L. Colitti; J. Linkova; X. Ma; D. Lamparter
Status
PROPOSED STANDARD
Stream
IETF
Area
int
Pages
14
Also known as
—
Updates:
RFC 4861, RFC 4862

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/9762-using-router-advertisements-to-signal-the-availability-of-dhcpv6-prefix-delegati