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Reactive Discovery of Point-to-Point Routes in Low-Power and Lossy Networks
RFC 6997

Internet Engineering Task Force (IETF)                     M. Goyal, Ed.
Request for Comments: 6997                  Univ. of Wisconsin Milwaukee
Category: Experimental                                       E. Baccelli
ISSN: 2070-1721                                               M. Philipp
                                                                   INRIA
                                                               A. Brandt
                                                           Sigma Designs
                                                             J. Martocci
                                                        Johnson Controls
                                                             August 2013

              Reactive Discovery of Point-to-Point Routes
                    in Low-Power and Lossy Networks

Abstract

   This document specifies a point-to-point route discovery mechanism,
   complementary to the Routing Protocol for Low-power and Lossy
   Networks (RPL) core functionality.  This mechanism allows an IPv6
   router to discover "on demand" routes to one or more IPv6 routers in
   a Low-power and Lossy Network (LLN) such that the discovered routes
   meet specified metrics constraints.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  This document is a product of the Internet Engineering
   Task Force (IETF).  It represents the consensus of the IETF
   community.  It has received public review and has been approved for
   publication by the Internet Engineering Steering Group (IESG).  Not
   all documents approved by the IESG are a candidate for any level of
   Internet Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6997.

Goyal, et al.                 Experimental                      [Page 1]
RFC 6997          Reactive P2P Route Discovery: P2P-RPL      August 2013

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Goyal, et al.                 Experimental                      [Page 2]
RFC 6997          Reactive P2P Route Discovery: P2P-RPL      August 2013

Table of Contents

   1. Introduction ....................................................4
   2. The Use Cases ...................................................4
   3. Terminology .....................................................5
   4. Applicability ...................................................6
   5. Functional Overview .............................................7
   6. P2P Route Discovery Mode of Operation ..........................10
      6.1. Setting a P2P Mode DIO ....................................10
   7. P2P Route Discovery Option (P2P-RDO) ...........................15
   8. The P2P Discovery Reply Object (P2P-DRO) .......................18
      8.1. Secure P2P-DRO ............................................20
      8.2. Setting a P2P-RDO Carried in a P2P Discovery Reply
           Object ....................................................21
   9. P2P-RPL Route Discovery by Creating a Temporary DAG ............21
      9.1. Joining a Temporary DAG ...................................21
      9.2. Trickle Operation for P2P Mode DIOs .......................22
      9.3. Processing a P2P Mode DIO .................................24
      9.4. Additional Processing of a P2P Mode DIO at an
           Intermediate Router .......................................26
      9.5. Additional Processing of a P2P Mode DIO at the Target .....27
      9.6. Processing a P2P-DRO at an Intermediate Router ............28
      9.7. Processing a P2P-DRO at the Origin ........................30
   10. The P2P Discovery Reply Object Acknowledgement (P2P-DRO-ACK) ..31
   11. Secure P2P-RPL Operation ......................................32
   12. Packet Forwarding along a Route Discovered Using P2P-RPL ......33
   13. Interoperability with Core RPL ................................34

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