Multicast Protocol for Low power and Lossy Networks (MPL)
draft-ietf-roll-trickle-mcast-02

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Last updated 2012-10-19
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ROLL                                                              J. Hui
Internet-Draft                                                     Cisco
Intended status: Standards Track                               R. Kelsey
Expires: April 22, 2013                                     Silicon Labs
                                                        October 19, 2012

       Multicast Protocol for Low power and Lossy Networks (MPL)
                    draft-ietf-roll-trickle-mcast-02

Abstract

   This document specifies the Multicast Protocol for Low power and
   Lossy Networks (MPL) that provides IPv6 multicast forwarding in
   constrained networks.  MPL avoids the need to construct or maintain
   any multicast forwarding topology, disseminating messages to all MPL
   forwarders in an MPL domain.  MPL uses the Trickle algorithm to drive
   packet transmissions for both control and data-plane packets.
   Specific Trickle parameter configurations allow MPL to trade between
   dissemination latency and transmission efficiency.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on April 22, 2013.

Copyright Notice

   Copyright (c) 2012 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

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   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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   4.  Message Formats  . . . . . . . . . . . . . . . . . . . . . . .  7
     4.1.  MPL Option . . . . . . . . . . . . . . . . . . . . . . . .  7
     4.2.  ICMPv6 MPL Message . . . . . . . . . . . . . . . . . . . .  8
       4.2.1.  MPL Window . . . . . . . . . . . . . . . . . . . . . .  9
   5.  MPL Forwarder Behavior . . . . . . . . . . . . . . . . . . . . 11
     5.1.  Multicast Packet Dissemination . . . . . . . . . . . . . . 11
       5.1.1.  Trickle Parameters and Variables . . . . . . . . . . . 12
       5.1.2.  Proactive Propagation  . . . . . . . . . . . . . . . . 12
       5.1.3.  Reactive Propagation . . . . . . . . . . . . . . . . . 13
     5.2.  Sliding Windows  . . . . . . . . . . . . . . . . . . . . . 13
     5.3.  Transmission of MPL Multicast Packets  . . . . . . . . . . 15
     5.4.  Reception of MPL Multicast Packets . . . . . . . . . . . . 16
     5.5.  Transmission of ICMPv6 MPL Messages  . . . . . . . . . . . 16
     5.6.  Reception of ICMPv6 MPL Messages . . . . . . . . . . . . . 17
   6.  MPL Parameters . . . . . . . . . . . . . . . . . . . . . . . . 19
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 20
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 21
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 22
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 23
     10.2. Informative References . . . . . . . . . . . . . . . . . . 23
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 24

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1.  Introduction

   Low power and Lossy Networks typically operate with strict resource
   constraints in communication, computation, memory, and energy.  Such
   resource constraints may preclude the use of existing IPv6 multicast
   topology and forwarding mechanisms.  Traditional IP multicast
   forwarding typically relies on topology maintenance mechanisms to
   forward multicast messages to all subscribers of a multicast group.
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