OSPFv3 Extensions for SRv6
draft-ietf-lsr-ospfv3-srv6-extensions-00

Document Type Active Internet-Draft (lsr WG)
Last updated 2020-02-12
Replaces draft-li-lsr-ospfv3-srv6-extensions
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Link State Routing                                                 Z. Li
Internet-Draft                                                     Z. Hu
Intended status: Standards Track                                D. Cheng
Expires: August 15, 2020                             Huawei Technologies
                                                      K. Talaulikar, Ed.
                                                               P. Psenak
                                                           Cisco Systems
                                                       February 12, 2020

                       OSPFv3 Extensions for SRv6
                draft-ietf-lsr-ospfv3-srv6-extensions-00

Abstract

   Segment Routing (SR) allows for a flexible definition of end-to-end
   paths by encoding paths as sequences of topological sub-paths, called
   "segments".  Segment Routing architecture can be implemented over an
   MPLS data plane as well as an IPv6 data plane.  This draft describes
   the OSPFv3 extensions required to support Segment Routing over an
   IPv6 data plane (SRv6).

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   This Internet-Draft will expire on August 15, 2020.

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Li, et al.               Expires August 15, 2020                [Page 1]
Internet-Draft         OSPFv3 Extensions for SRV6          February 2020

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

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  SRv6 Capabilities TLV . . . . . . . . . . . . . . . . . . . .   3
   3.  Advertisement of Supported Algorithms . . . . . . . . . . . .   5
   4.  Advertisement of SRH Operation Limits . . . . . . . . . . . .   5
     4.1.  Maximum Segments Left MSD Type  . . . . . . . . . . . . .   5
     4.2.  Maximum End Pop MSD Type  . . . . . . . . . . . . . . . .   5
     4.3.  Maximum H.Encaps MSD Type . . . . . . . . . . . . . . . .   6
     4.4.  Maximum End D MSD Type  . . . . . . . . . . . . . . . . .   6
   5.  Advertisement of SRv6 Locator and End SIDs  . . . . . . . . .   6
   6.  SRv6 Locator LSA  . . . . . . . . . . . . . . . . . . . . . .   7
     6.1.  SRv6 Locator TLV  . . . . . . . . . . . . . . . . . . . .   9
   7.  Advertisment of SRv6 End SIDs . . . . . . . . . . . . . . . .  11
   8.  Advertisment of SRv6 SIDs Associated with Adjacencies . . . .  12
     8.1.  SRv6 End.X SID Sub-TLV  . . . . . . . . . . . . . . . . .  13
     8.2.  SRv6 LAN End.X SID Sub-TLV  . . . . . . . . . . . . . . .  15
   9.  SRv6 SID Structure Sub-TLV  . . . . . . . . . . . . . . . . .  16
   10. Advertising Endpoint Behaviors  . . . . . . . . . . . . . . .  17
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  18
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
     12.1.  OSPF Router Information TLVs . . . . . . . . . . . . . .  19
     12.2.  OSPFv3 LSA Function Codes  . . . . . . . . . . . . . . .  19
     12.3.  OSPFv3 Extended-LSA Sub-TLVs . . . . . . . . . . . . . .  19
     12.4.  OSPFv3 Locator LSA TLVs  . . . . . . . . . . . . . . . .  19
     12.5.  OSPFv3 Locator LSA Sub-TLVs  . . . . . . . . . . . . . .  20
   13. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  20
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     14.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  23

1.  Introduction

   Segment Routing (SR) architecture [RFC8402] specifies how a node can
   steer a packet through an ordered list of instructions, called
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