RPL Mode of Operation extension
draft-rahul-roll-mop-ext-00

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Last updated 2019-02-11
Replaces draft-rahul-mop-ext
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ROLL                                                      R. Jadhav, Ed.
Internet-Draft                                               Huawei Tech
Intended status: Standards Track                              P. Thubert
Expires: August 15, 2019                                           Cisco
                                                       February 11, 2019

                    RPL Mode of Operation extension
                      draft-rahul-roll-mop-ext-00

Abstract

   RPL allows different mode of operations which allows nodes to have a
   consensus on the basic primitives that must be supported to join the
   network.  The MOP field in RFC6550 is of 3 bits and is fast
   depleting.  This document extends the MOP field specification and
   adds a notion of capabilities using which the nodes can further
   advertise their support for, possibly optional, capabilities.

Status of This Memo

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

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   This Internet-Draft will expire on August 15, 2019.

Copyright Notice

   Copyright (c) 2019 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
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   include Simplified BSD License text as described in Section 4.e of

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language and Terminology . . . . . . . . . .   2
   2.  Requirements for this document  . . . . . . . . . . . . . . .   3
   3.  Extended MOP Control Message Option . . . . . . . . . . . . .   3
     3.1.  Final MOP . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Capabilities  . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Capability Control Message Option . . . . . . . . . . . .   5
     4.2.  Capabilities Handshake  . . . . . . . . . . . . . . . . .   5
   5.  Implementations Consideration . . . . . . . . . . . . . . . .   5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Appendix A.  Capability Handshake Example . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   RPL [RFC6550] specifies a proactive distance-vector based routing
   scheme.  The protocol creates a DAG-like structure which operates
   with a given "Mode of Operation" (MOP) determining the minimal and
   mandatory set of primitives to be supported by all the participating
   nodes.

   MOP as per [RFC6550] is a 3-bit value carried in DIO messages and is
   specific to the RPL Instance.  The receipient of the DIO message can
   join the specified network as a router only when it can support the
   primitives as required by the mode of operation value.  For example,
   in case of MOP=3 (Storing MOP with multicast support) the nodes can
   join the network as routers only when they can handle the DAO
   advertisements from the peers and manage routing tables.

1.1.  Requirements Language and Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

   MOP: Mode of Operation.  Identifies the mode of operation of the RPL
   Instance as administratively provisioned at and distributed by the
   DODAG root.

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