6lo Working Group                                        L. Iannone, Ed.
Internet-Draft                                                     G. Li
Intended status: Standards Track                                  D. Lou
Expires: 22 March 2025                                            Huawei
                                                                  P. Liu
                                                                 R. Long
                                                            China Mobile
                                                            K. Makhijani
                                                               Futurewei
                                                              P. Thubert
                                                       18 September 2024


 Path-Aware Semantic Addressing (PASA) for Low power and Lossy Networks
            draft-ietf-6lo-path-aware-semantic-addressing-08

Abstract

   This document specifies a topological addressing scheme, Path-Aware
   Semantic Addressing (PASA), that enables IP packet stateless
   forwarding.  The forwarding decision is based solely on the
   destination address structure.  This document focuses on carrying IP
   packets across an LLN (Low power and Lossy Network), in which the
   topology is static, the location of the nodes is fixed, and the
   connection between the nodes is also rather stable.  This
   specifications describes the PASA architecture, along with PASA
   address allocation, forwarding mechanism, header format design, and
   IPv6 interconnection support.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on 22 March 2025.






Iannone, et al.           Expires 22 March 2025                 [Page 1]

Internet-Draft                    PASA                    September 2024


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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   4
   4.  Comprehensive Use Cases . . . . . . . . . . . . . . . . . . .   5
     4.1.  Smart Grid  . . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Smart Home  . . . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Data Center Monitoring  . . . . . . . . . . . . . . . . .   7
     4.4.  Industrial Operational Technology Networks  . . . . . . .   9
   5.  Architectural Overview  . . . . . . . . . . . . . . . . . . .  11
   6.  PASA Address Assignment . . . . . . . . . . . . . . . . . . .  13
     6.1.  Tree Address Assignment Function (TAAF) . . . . . . . . .  13
     6.2.  Limitation on the Number of Child Nodes . . . . . . . . .  16
     6.3.  PASA TAAF Addresses and IPv6 Addresses  . . . . . . . . .  17
   7.  Forwarding in a PASA Network  . . . . . . . . . . . . . . . .  18
     7.1.  Forwarding toward a local PASA endpoint . . . . . . . . .