The IPv6 Compressed Routing Header (CRH)
draft-bonica-6man-comp-rtg-hdr-11

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6man                                                           R. Bonica
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                               Y. Kamite
Expires: August 19, 2020                  NTT Communications Corporation
                                                                 T. Niwa
                                                                    KDDI
                                                               A. Alston
                                                          Liquid Telecom
                                                                   N. So
                                                            Reliance Jio
                                                       February 16, 2020

                The IPv6 Compressed Routing Header (CRH)
                   draft-bonica-6man-comp-rtg-hdr-11

Abstract

   This document defines two new Routing header types.  Collectively,
   they are called the Compressed Routing Headers (CRH).  Individually,
   they are called CRH-16 and CRH-32.

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Bonica, et al.           Expires August 19, 2020                [Page 1]
Internet-Draft       IPv6 Compressed Routing Header        February 2020

   carefully, as they describe your rights and restrictions with respect
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  The Compressed Routing Headers (CRH)  . . . . . . . . . . . .   3
   4.  The CRH  Forwarding Information Base (CRH-FIB)  . . . . . . .   5
   5.  Processing Rules  . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Computing Minimum CRH Length  . . . . . . . . . . . . . .   7
   6.  Mutability  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Applications And SIDs . . . . . . . . . . . . . . . . . . . .   8
   8.  Management Considerations . . . . . . . . . . . . . . . . . .   8
   9.  ICMPv6 Considerations . . . . . . . . . . . . . . . . . . . .   8
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   8
   11. Implementation and Deployment Status  . . . . . . . . . . . .   9
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   13. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   14. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   9
   15. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     15.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     15.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Appendix A.  CRH Processing Examples  . . . . . . . . . . . . . .  12
   Appendix B.  CRH Processing Examples  . . . . . . . . . . . . . .  13
     B.1.  The SID List Contains One Entry For Each Segment In The
           Path  . . . . . . . . . . . . . . . . . . . . . . . . . .  14
     B.2.  The SID List Omits The First Entry In The Path  . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   IPv6 [RFC8200] source nodes use Routing headers to specify the path
   that a packet takes to its destination.  The IETF has defined several
   Routing header types [IANA-RH].  RH0 [RFC5095] was the first to be
   defined and was deprecated because of security vulnerabilities.

   This document defines two new Routing header types.  Collectively,
   they are called the Compressed Routing Headers (CRH).  Individually,
   they are called CRH-16 and CRH-32.

   The CRH, like RH0, allows IPv6 source nodes to specify the path that
   a packet takes to its destination.  The CRH differs from RH0 because:
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