Neighbor Management Policy for 6LoWPAN
draft-ietf-lwig-nbr-mgmt-policy-02

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Last updated 2018-08-24
Replaces draft-jadhav-lwig-nbr-mgmt-policy
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LWIG                                                      R. Jadhav, Ed.
Internet-Draft                                                  R. Sahoo
Intended status: Informational                                    Huawei
Expires: February 25, 2019                                  S. Duquennoy
                                                                   Inria
                                                             J. Eriksson
                                                          Yanzi Networks
                                                         August 24, 2018

                 Neighbor Management Policy for 6LoWPAN
                   draft-ietf-lwig-nbr-mgmt-policy-02

Abstract

   This document describes the problems associated with neighbor cache
   management in multihop networks involving resource-constrained
   devices.  Thereafter, it also presents a sample neighbor management
   policy that allows efficient cache management in multihop LLNs (low-
   power and lossy networks such as LoWPAN) with resource-constrained
   devices.

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 February 25, 2019.

Copyright Notice

   Copyright (c) 2018 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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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Jadhav, et al.          Expires February 25, 2019               [Page 1]
Internet-Draft   Neighbor Management Policy for 6LoWPAN      August 2018

   carefully, as they describe your rights and restrictions with respect
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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 . . . . . . . . . .   4
   2.  Neighbor Management . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Significance of Neighbor management policy  . . . . . . .   5
     2.2.  Trivial neighbor management policies  . . . . . . . . . .   6
     2.3.  Lifecycle of a NCE  . . . . . . . . . . . . . . . . . . .   7
       2.3.1.  NCE Insertion . . . . . . . . . . . . . . . . . . . .   7
       2.3.2.  NCE Deletion  . . . . . . . . . . . . . . . . . . . .  10
       2.3.3.  NCE Eviction  . . . . . . . . . . . . . . . . . . . .  11
         2.3.3.1.  Eviction for directly connected routing entries .  11
       2.3.4.  NCE Reinforcement . . . . . . . . . . . . . . . . . .  12
     2.4.  Requirements of a good neighbor management policy . . . .  12
     2.5.  Approaches to neighbor management policy  . . . . . . . .  13
       2.5.1.  Reactive Approach . . . . . . . . . . . . . . . . . .  13
       2.5.2.  Proactive Approach  . . . . . . . . . . . . . . . . .  13
   3.  Reservation based Neighbor Management Policy  . . . . . . . .  14
     3.1.  Limitations of such a policy  . . . . . . . . . . . . . .  15
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  17
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

   In a wireless multihop LLN, the node densities (maximum nodes
   reachable on the same hop) may vary significantly depending upon
   deployments and scenarios.  Examples of such networks is LoWPAN [REF]
   networks.  While there is some policy control possible with regards
   to the network size in terms of maximum number of devices connected,
   it is especially difficult to set a figure on what will be the
   maximum node density given a deployment.  For e.g.  A network can put
   an upper limit on max 1000 devices but it is impossible to state what
   the node density will be in this 1000 node network.
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