[Roll] RFC 9914 on Root-Initiated Routing State in the Routing Protocol for Low-Power and Lossy Networks (RPL)

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

        RFC 9914

        Title:      Root-Initiated Routing State in the 
                    Routing Protocol for Low-Power and Lossy 
                    Networks (RPL) 
        Author:     P. Thubert, Ed.,
                    R.A. Jadhav,
                    M. Richardson
        Status:     Standards Track
        Stream:     IETF
        Date:       April 2026
        Mailbox:    pascal.thubert@gmail.com,
                    rahul.ietf@gmail.com,
                    mcr+ietf@sandelman.ca
        Pages:      75
        Updates:    RFC 6550, RFC 6553, RFC 8138

        I-D Tag:    draft-ietf-roll-dao-projection-40.txt

        URL:        https://www.rfc-editor.org/info/rfc9914

        DOI:        10.17487/RFC9914

The Routing Protocol for Low-Power and Lossy Networks (RPL) (RFC
6550) enables data packet routing along a Destination-Oriented
Directed Acyclic Graph (DODAG). However, the default route
establishment mechanism relies on hop-by-hop forwarding along the
DODAG, which may not always provide optimal routing efficiency. This
document introduces the concept of Destination Advertisement Object
(DAO) Projection, a mechanism that allows a RPL Root or an external
controller to install optimized routes within the RPL domain. DAO
Projections enable the creation of optimized unicast or multicast
routes that do not strictly follow the DODAG structure, thereby
improving routing efficiency, reliability, availability, and resource
utilization in the RPL domain. This document specifies two types of
Projected Routes (P-Routes) -- Storing Mode and Non-Storing Mode --
and outlines the signaling procedures necessary to establish,
maintain, and remove these routes.  This document updates RFCs 6550,
6553, and 8138.

This document is a product of the Routing Over Low power and Lossy networks 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 
memo is unlimited.

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