Enabling secure network enrollment in RPL networks
draft-richardson-6tisch-roll-enrollment-priority-02
6lo Working Group M. Richardson
Internet-Draft Sandelman Software Works
Intended status: Informational February 06, 2019
Expires: August 10, 2019
Enabling secure network enrollment in RPL networks
draft-richardson-6tisch-roll-enrollment-priority-02
Abstract
[I-D.richardson-6tisch-enrollment-enhanced-beacon] defines a method
by which a potential [I-D.ietf-6tisch-minimal-security] can announce
itself as a available for new Pledges to Join a network. The
announcement includes a priority for join. This document provides a
mechanism by which a RPL DODAG root can disable join announcements,
or adjust the base priority for join operation.
Status of This Memo
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This Internet-Draft will expire on August 10, 2019.
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Richardson Expires August 10, 2019 [Page 1]
Internet-Draft J-Pref DIO February 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Protocol Definition . . . . . . . . . . . . . . . . . . . . . 3
3. Security Considerations . . . . . . . . . . . . . . . . . . . 4
4. Privacy Considerations . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 4
7.1. Normative References . . . . . . . . . . . . . . . . . . 4
7.2. Informative References . . . . . . . . . . . . . . . . . 5
Appendix A. Change history . . . . . . . . . . . . . . . . . . . 6
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
[RFC7554] describes the use of the time-slotted channel hopping
(TSCH) mode of [ieee802154]. [I-D.ietf-6tisch-minimal-security] and
[I-D.ietf-6tisch-dtsecurity-secure-join] describe mechanisms by which
a new node (the "pledge)" can use a friendly router as a Join Proxy.
[I-D.richardson-6tisch-enrollment-enhanced-beacon] describes an
extension to the 802.15.4 Enhanced Beacon that is used by a Join
Proxy to announce its existence such that Pledges can find them.
It has become clear that not every routing member of the mesh ought
to announce itself as a Join Proxy. There are a variety of local
reasons by which a 6LR might not want to provide the Join Proxy
function. They include available battery power, already committed
network bandwidth, and also total available memory available for Join
proxy neighbor cache slots.
There are other situations where the operator of the network would
like to selective enable or disable the join process in a particular
DODAG.
As the join process involves permitting unencrypted traffic into the
best effort part of a (TSCH) network, it would be better to have the
join process off when no new nodes are expected.
A network operator might also be able to recognize when certain parts
of the network are overloaded and can not accomodate additional join
traffic, and it would like to adjust the join priority among all
nodes in the subtree of a congested link.
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This document describes an RPL DIO option that can be used to
announce a minimum join priority. Each potential Join Proxy would
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