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

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        RFC 9762

        Title:      Using Router Advertisements to Signal 
                    the Availability of DHCPv6 Prefix Delegation 
                    to Clients 
        Author:     L. Colitti,
                    J. Linkova,
                    X. Ma, Ed.,
                    D. Lamparter
        Status:     Standards Track
        Stream:     IETF
        Date:       June 2025
        Mailbox:    lorenzo@google.com,
                    furry13@gmail.com,
                    xiaom@google.com,
                    equinox@diac24.net
        Pages:      14
        Updates:    RFC 4861, RFC 4862

        I-D Tag:    draft-ietf-6man-pio-pflag-12.txt

        URL:        https://www.rfc-editor.org/info/rfc9762

        DOI:        10.17487/RFC9762

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.

This document is a product of the IPv6 Maintenance Working Group of the IETF.

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
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
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