Observations of RPL: IPv6 Routing Protocol for Low power and Lossy Networks
draft-clausen-lln-rpl-experiences-05

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Network Working Group                                         T. Clausen
Internet-Draft                                      A. Colin de Verdiere
Intended status: Informational                                     J. Yi
Expires: July 18, 2013                          LIX, Ecole Polytechnique
                                                              U. Herberg
                                         Fujitsu Laboratories of America
                                                             Y. Igarashi
                                        Hitachi, Ltd., Yokohama Research
                                                              Laboratory
                                                        January 14, 2013

   Observations of RPL: IPv6 Routing Protocol for Low power and Lossy
                                Networks
                  draft-clausen-lln-rpl-experiences-05

Abstract

   With RPL - the "IPv6 Routing Protocol for Low-power Lossy Networks" -
   having been published as a Proposed Standard after a ~2-year
   development cycle, this document presents an evaluation of the
   resulting protocol, of its applicability, and of its limits.  The
   documents presents a selection of observations of the protocol
   characteristics, exposes experiences acquired when producing various
   prototype implementations of RPL, and presents results obtained from
   testing this protocol - by way of network simulations, in network
   testbeds and in deployments.  The document aims at providing a better
   understanding of possible weaknesses and limits of RPL, notably the
   possible directions that further protocol developments should
   explore, in order to address these.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on July 18, 2013.

Clausen, et al.           Expires July 18, 2013                 [Page 1]
Internet-Draft             Observations of RPL              January 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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Clausen, et al.           Expires July 18, 2013                 [Page 2]
Internet-Draft             Observations of RPL              January 2013

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  RPL Overview . . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  RPL Message Emission Timing - Trickle Timers . . . . . . .  7
   4.  Requirement Of DODAG Root  . . . . . . . . . . . . . . . . . .  8
     4.1.  Observations . . . . . . . . . . . . . . . . . . . . . . .  8
   5.  RPL Data Traffic Flows . . . . . . . . . . . . . . . . . . . .  9
     5.1.  Observations . . . . . . . . . . . . . . . . . . . . . . . 10
   6.  Fragmentation Of RPL Control Messages And Data Packet  . . . . 11
     6.1.  Observations . . . . . . . . . . . . . . . . . . . . . . . 12
   7.  The DAO Mechanism: Downward and Point-to-Point Routes  . . . . 14
     7.1.  Observations . . . . . . . . . . . . . . . . . . . . . . . 14
   8.  Address Aggregation and Summarization  . . . . . . . . . . . . 16
     8.1.  Observations . . . . . . . . . . . . . . . . . . . . . . . 17
   9.  Link Bidirectionality Verification . . . . . . . . . . . . . . 18
     9.1.  Observations . . . . . . . . . . . . . . . . . . . . . . . 18
   10. Neighbor Unreachability Detection For Unidirectional Links . . 19
     10.1. Observations . . . . . . . . . . . . . . . . . . . . . . . 20
   11. RPL Implementability and Complexity  . . . . . . . . . . . . . 21
     11.1. Observations . . . . . . . . . . . . . . . . . . . . . . . 22
   12. Underspecification . . . . . . . . . . . . . . . . . . . . . . 22
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