Compressed SRv6 Network Programming
draft-li-spring-compressed-srv6-np-02

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Last updated 2020-02-25
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SPRING Working Group                                               Z. Li
Internet-Draft                                                     C. Li
Intended status: Standards Track                     Huawei Technologies
Expires: August 28, 2020                                          C. Xie
                                                           China Telecom
                                                                  K. LEE
                                                                   LG U+
                                                                 H. Tian
                                                                 F. Zhao
                                                                   CAICT
                                                             J. Guichard
                                                  Futurewei Technologies
                                                                   C. Li
                                                           China Telecom
                                                                 S. Peng
                                                     Huawei Technologies
                                                       February 25, 2020

                  Compressed SRv6 Network Programming
                 draft-li-spring-compressed-srv6-np-02

Abstract

   Segment Routing can be applied to the IPv6 data plane by leveraging a
   new type of Routing Extension Header, called Segment Routing Header
   (SRH).  However, the overhead introduced by SRH may be a challenge
   for existing hardware, which may influence on the forwarding
   performance and the payload efficiency.

   This document defines a compressed SRv6 network programming mechanism
   in order to reduce the overhead of SRv6 by introducing the Compressed
   Segment Identifier (C-SID) and the Compressed SRH (C-SRH).  The C-SRH
   can be a new Routing Header or an enhancement of SRH.

Status of This Memo

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Li, et al.               Expires August 28, 2020                [Page 1]
Internet-Draft             Compressed SRv6 NP              February 2020

   time.  It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on August 28, 2020.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   3.  Compressed SID (C-SID)  . . . . . . . . . . . . . . . . . . .   4
   4.  Compressed Segment Routing Header (C-SRH) . . . . . . . . . .   5
   5.  C-SRH Processing  . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Control Plane Consideration . . . . . . . . . . . . . . . . .  13
   7.  Illustration  . . . . . . . . . . . . . . . . . . . . . . . .  14
     7.1.  Reference Diagram . . . . . . . . . . . . . . . . . . . .  15
     7.2.  Compressed SRv6 Forwarding Example  . . . . . . . . . . .  15
   8.  Inter-domain Routing Using C-SRH  . . . . . . . . . . . . . .  17
   9.  Benefits  . . . . . . . . . . . . . . . . . . . . . . . . . .  18
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  20
   12. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  20
   13. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  20
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  20
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  20
     14.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22
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