An Enhanced Source Routing Header Based on RH3
draft-han-6man-enhanced-source-routing-header-02

Document Type Active Internet-Draft (individual)
Authors Han Jie  , Wang Huilai 
Last updated 2021-01-18
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L                                                                 H. Jie
Internet-Draft                                                 W. Huilai
Intended status: Standards Track                         ZTE Corporation
Expires: July 21, 2021                                  January 17, 2021

             An Enhanced Source Routing Header Based on RH3
            draft-han-6man-enhanced-source-routing-header-02

Abstract

   IPv6 Routing header type 3 (termed as RH3) is defined and used in
   Low-Power and Lossy Networks (LLNs) that are typically constrained in
   resources (limited communication data rate, processing power, energy
   capacity, memory).  Based on the mechanisms introduced by RH3, this
   document specifies an new IPv6 Routing Header type that provides
   encapsulation capability of segments with various lengths and can be
   applied to more scenarios.

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   This Internet-Draft will expire on July 21, 2021.

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Jie & Huilai              Expires July 21, 2021                 [Page 1]
Internet-Draft       Enhanced Source Routing Header         January 2021

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Format of the Source Routing Header . . . . . . . . . . . . .   3
   4.  Format of the Enhanced Source Routing Header  . . . . . . . .   3
   5.  Generating E-SRH  . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Processing E-SRH  . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Deployment Considerations . . . . . . . . . . . . . . . . . .   8
     7.1.  Heterogeneous Segment List  . . . . . . . . . . . . . . .   9
     7.2.  Independent Arguments in E-SRH  . . . . . . . . . . . . .   9
     7.3.  ICMP Error Processing . . . . . . . . . . . . . . . . . .   9
     7.4.  Repair Path . . . . . . . . . . . . . . . . . . . . . . .  10
     7.5.  Binding to Outer Segment List . . . . . . . . . . . . . .  10
     7.6.  In-situ OAM . . . . . . . . . . . . . . . . . . . . . . .  10
     7.7.  NAT Service Funtion . . . . . . . . . . . . . . . . . . .  11
     7.8.  Operation and Maintenance . . . . . . . . . . . . . . . .  11
     7.9.  Upper-Layer Checksums . . . . . . . . . . . . . . . . . .  11
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   10. Normative References  . . . . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   Routing headers are defined in [RFC8200].  [RFC6554] specifies the
   Source Routing Header (SRH), i.e., IPv6 Routing header type 3 (termed
   as RH3), for use strictly between RPL routers in the Low-Power and
   Lossy Networks (LLNs) [RFC6550], which are typically constrained in
   resources (limited communication data rate, processing power, energy
   capacity, memory).  It introduces mechanisms to compact the source
   route entries when all entries share the same prefix with the IPv6
   Destination Address of a packet carrying an RH3, a typical scenario
   in LLNs using source routing.  The compaction mechanism reduces
   consumption of scarce resources such as channel capacity.  However,
   it is challenging when all entries do not have the same prefix, for
   example, only a part of entries share the same prefix, but still want
   to encode all routries in a single routing header and reduce the
   overhead.

   This document specifies an enhanced Source Routing Header (termed as
   E-SRH) to enhance the encapsulation capability of segments with
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