Efficient Route Invalidation
draft-ietf-roll-efficient-npdao-10

Document Type Active Internet-Draft (roll WG)
Last updated 2019-05-21 (latest revision 2019-04-27)
Replaces draft-jadhav-roll-efficient-npdao
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Peter Van der Stok
Shepherd write-up Show (last changed 2018-11-03)
IESG IESG state Waiting for AD Go-Ahead::Revised I-D Needed
Consensus Boilerplate Yes
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Responsible AD Alvaro Retana
Send notices to Peter Van der Stok <consultancy@vanderstok.org>, aretana.ietf@gmail.com
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ROLL                                                      R. Jadhav, Ed.
Internet-Draft                                                    Huawei
Intended status: Standards Track                              P. Thubert
Expires: October 29, 2019                                          Cisco
                                                                R. Sahoo
                                                                  Z. Cao
                                                                  Huawei
                                                          April 27, 2019

                      Efficient Route Invalidation
                   draft-ietf-roll-efficient-npdao-10

Abstract

   This document describes the problems associated with No-Path
   Destination Advertisement Object (NPDAO) messaging used in Routing
   Protocol for Low power and lossy networks (RPL) for route
   invalidation and signaling changes to improve route invalidation
   efficiency.

Status of This Memo

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   This Internet-Draft will expire on October 29, 2019.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
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Jadhav, et al.          Expires October 29, 2019                [Page 1]
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   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language and Terminology . . . . . . . . . .   3
     1.2.  Current NPDAO messaging . . . . . . . . . . . . . . . . .   4
     1.3.  Why NPDAO is important? . . . . . . . . . . . . . . . . .   5
   2.  Problems with current         NPDAO messaging . . . . . . . .   6
     2.1.  Lost NPDAO due to link break to the previous parent . . .   6
     2.2.  Invalidate routes of dependent nodes  . . . . . . . . . .   6
     2.3.  Possible route downtime caused by async operation of
           NPDAO and DAO . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Requirements for the NPDAO Optimization . . . . . . . . . . .   6
     3.1.  Req#1: Remove messaging dependency on link to the
           previous             parent . . . . . . . . . . . . . . .   6
     3.2.  Req#2: Dependent nodes route invalidation on parent
           switching . . . . . . . . . . . . . . . . . . . . . . . .   7
     3.3.  Req#3: Route invalidation should not impact data traffic    7
   4.  Changes to RPL signaling  . . . . . . . . . . . . . . . . . .   7
     4.1.  Change in RPL route invalidation semantics  . . . . . . .   7
     4.2.  Transit Information Option changes  . . . . . . . . . . .   8
     4.3.  Destination Cleanup Object (DCO)  . . . . . . . . . . . .   9
       4.3.1.  Secure DCO  . . . . . . . . . . . . . . . . . . . . .  10
       4.3.2.  DCO Options . . . . . . . . . . . . . . . . . . . . .  10
       4.3.3.  Path Sequence number in the DCO . . . . . . . . . . .  10
       4.3.4.  Destination Cleanup Option Acknowledgement (DCO-ACK)   11
       4.3.5.  Secure DCO-ACK  . . . . . . . . . . . . . . . . . . .  12
     4.4.  DCO Base Rules  . . . . . . . . . . . . . . . . . . . . .  12
     4.5.  Other considerations  . . . . . . . . . . . . . . . . . .  12
       4.5.1.  Dependent Nodes invalidation  . . . . . . . . . . . .  12
       4.5.2.  NPDAO and DCO in the same network . . . . . . . . . .  13
       4.5.3.  DCO with multiple preferred parents . . . . . . . . .  13
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
     6.1.  New Registry for the Destination Cleanup Object (DCO)
           Flags . . . . . . . . . . . . . . . . . . . . . . . . . .  15
     6.2.  New Registry for the Destination Cleanup Object
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