Neighbor Management Policy for 6LoWPAN
draft-ietf-lwig-nbr-mgmt-policy-03
LWIG R. Jadhav, Ed.
Internet-Draft R. Sahoo
Intended status: Informational Huawei
Expires: August 25, 2019 S. Duquennoy
Inria
J. Eriksson
Yanzi Networks
February 21, 2019
Neighbor Management Policy for 6LoWPAN
draft-ietf-lwig-nbr-mgmt-policy-03
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.
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This Internet-Draft will expire on August 25, 2019.
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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 . . . . . . . . . . . . . . 16
4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
6. Security Considerations . . . . . . . . . . . . . . . . . . . 17
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.1. Normative References . . . . . . . . . . . . . . . . . . 17
7.2. Informative References . . . . . . . . . . . . . . . . . 18
Appendix A. Performance Result . . . . . . . . . . . . . . . . . 19
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 20
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
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