The IPv6 Compact Routing Header (CRH)
draft-bonica-6man-comp-rtg-hdr-23

Document Type Active Internet-Draft (individual)
Authors Ron Bonica  , Yuji Kamite  , Andrew Alston  , Daniam Henriques  , Luay Jalil 
Last updated 2020-10-06
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6man                                                           R. Bonica
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                               Y. Kamite
Expires: April 9, 2021                    NTT Communications Corporation
                                                               A. Alston
                                                            D. Henriques
                                                          Liquid Telecom
                                                                L. Jalil
                                                                 Verizon
                                                         October 6, 2020

                 The IPv6 Compact Routing Header (CRH)
                   draft-bonica-6man-comp-rtg-hdr-23

Abstract

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

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   This Internet-Draft will expire on April 9, 2021.

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   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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   to this document.  Code Components extracted from this document must
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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)  . . . . . . .   4
   5.  Processing Rules  . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Computing Minimum CRH Length  . . . . . . . . . . . . . .   7
   6.  Mutability  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Applications And SIDs . . . . . . . . . . . . . . . . . . . .   8
   8.  Management Considerations . . . . . . . . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   10. Implementation and Deployment Status  . . . . . . . . . . . .   9
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   13. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   9
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     14.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Appendix A.  CRH Processing Examples  . . . . . . . . . . . . . .  11
     A.1.  The SID List Contains One Entry For Each Segment In The
           Path  . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     A.2.  The SID List Omits The First Entry In The Path  . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

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

   The CRH allows IPv6 source nodes to specify the path that a packet
   takes to its destination.  The CRH:

   o  Can be encoded in relatively few bytes.

   o  Is designed to operate within a network domain.  (See Section 9).

   The following are reasons for encoding the CRH in as few bytes as
   possible:

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