The IPv6 Compressed Routing Header (CRH)
draft-bonica-6man-comp-rtg-hdr-05

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Last updated 2019-07-06
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6man                                                           R. Bonica
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                               Y. Kamite
Expires: January 6, 2020                  NTT Communications Corporation
                                                                 T. Niwa
                                                                    KDDI
                                                               A. Alston
                                                            D. Henriques
                                                          Liquid Telecom
                                                                   N. So
                                                                   F. Xu
                                                            Reliance Jio
                                                                 G. Chen
                                                                   Baidu
                                                                  Y. Zhu
                                                                 G. Yang
                                                           China Telecom
                                                                 Y. Zhou
                                                               ByteDance
                                                            July 5, 2019

                The IPv6 Compressed Routing Header (CRH)
                   draft-bonica-6man-comp-rtg-hdr-05

Abstract

   This document defines a new IPv6 Routing header type, called the
   Compressed Routing Header (CRH).  SRv6+ nodes use the CRH to steer
   packets from segment to segment along SRv6+ paths.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on January 6, 2020.

Bonica, et al.           Expires January 6, 2020                [Page 1]
Internet-Draft       IPv6 Compressed Routing Header            July 2019

Copyright Notice

   Copyright (c) 2019 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  The Compressed Routing Header (CRH) . . . . . . . . . . . . .   3
   4.  Segment Forwarding Information Base (SFIB)  . . . . . . . . .   5
   5.  Processing Rules  . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   5
     5.2.  CRH Specific  . . . . . . . . . . . . . . . . . . . . . .   6
       5.2.1.  Computing Minimum CRH Length  . . . . . . . . . . . .   7
       5.2.2.  Strictly-Routed Topological Instructions  . . . . . .   8
       5.2.3.  Loosely-Routed Topological Instructions . . . . . . .   9
   6.  Mutability  . . . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Compliance  . . . . . . . . . . . . . . . . . . . . . . . . .   9
   8.  Management Considerations . . . . . . . . . . . . . . . . . .   9
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     12.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Appendix A.  CRH Processing Examples  . . . . . . . . . . . . . .  11
     A.1.  Loose Source Routing  . . . . . . . . . . . . . . . . . .  13
     A.2.  Loose Source Routing Preserving The First SID . . . . . .  13
     A.3.  Strict Source Routing . . . . . . . . . . . . . . . . . .  14
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