RFC 9926 on Prefix Registration for IPv6 Neighbor Discovery

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        RFC 9926

        Title:      Prefix Registration for IPv6 Neighbor 
                    Discovery 
        Author:     P. Thubert, Ed.
        Status:     Standards Track
        Stream:     IETF
        Date:       February 2026
        Mailbox:    pascal.thubert@gmail.com
        Pages:      24
        Updates:    RFC 4861, RFC 6550, RFC 8505, RFC 8928, RFC 9010

        I-D Tag:    draft-ietf-6lo-prefix-registration-18.txt

        URL:        https://www.rfc-editor.org/info/rfc9926

        DOI:        10.17487/RFC9926

This document updates IPv6 Neighbor Discovery (RFC 4861) and IPv6
Subnet Neighbor Discovery (RFC 8505, RFC 8928) to enable a node that
owns or is directly connected to a prefix to register that prefix to
neighbor routers.  The registration indicates that the registered
prefix can be reached via the advertising node without a loop.  The
unicast prefix registration allows the node to request one or more
neighbor routers to redistribute the prefix in another routing domain
regardless of the routing protocol used in that domain.  This
document updates the Routing Protocol for Low-Power and Lossy
Networks (RPL), as specified in RFCs 6550 and 9010, to enable a
6LoWPAN Router (6LR) to inject the registered prefix in RPL.

This document is a product of the IPv6 over Networks of Resource-constrained Nodes 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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