{"draft":"draft-ietf-roll-dao-projection-40","doc_id":"RFC9914","title":"Root-Initiated Routing State in the Routing Protocol for Low-Power and Lossy Networks (RPL)","authors":["P. Thubert, Ed.","R.A. Jadhav","M. Richardson"],"format":["HTML","TEXT","PDF","XML"],"page_count":"75","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Routing Over Low power and Lossy networks","abstract":"The Routing Protocol for Low-Power and Lossy Networks (RPL) (RFC\r\n6550) enables data packet routing along a Destination-Oriented\r\nDirected Acyclic Graph (DODAG). However, the default route\r\nestablishment mechanism relies on hop-by-hop forwarding along the\r\nDODAG, which may not always provide optimal routing efficiency. This\r\ndocument introduces the concept of Destination Advertisement Object\r\n(DAO) Projection, a mechanism that allows a RPL Root or an external\r\ncontroller to install optimized routes within the RPL domain. DAO\r\nProjections enable the creation of optimized unicast or multicast\r\nroutes that do not strictly follow the DODAG structure, thereby\r\nimproving routing efficiency, reliability, availability, and resource\r\nutilization in the RPL domain. This document specifies two types of\r\nProjected Routes (P-Routes) -- Storing Mode and Non-Storing Mode --\r\nand outlines the signaling procedures necessary to establish,\r\nmaintain, and remove these routes.  This document updates RFCs 6550,\r\n6553, and 8138.","pub_date":"April 2026","keywords":["IOT","SDN","DetNet","RAW"],"obsoletes":[],"obsoleted_by":[],"updates":["RFC6550","RFC6553","RFC8138"],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9914","errata_url":null}