OSPFv3 Extensions for SRv6
draft-li-ospf-ospfv3-srv6-extensions-07

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Last updated 2019-11-04
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Network Working Group                                              Z. Li
Internet-Draft                                                     Z. Hu
Intended status: Standards Track                                D. Cheng
Expires: May 7, 2020                                 Huawei Technologies
                                                           K. Talaulikar
                                                               P. Psenak
                                                           Cisco Systems
                                                        November 4, 2019

                       OSPFv3 Extensions for SRv6
                draft-li-ospf-ospfv3-srv6-extensions-07

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).

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 7, 2020.

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Internet-Draft         OSPFv3 Extensions for SRV6       November 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  SRv6-Capabilities TLV . . . . . . . . . . . . . . . . . . . .   3
   3.  Advertisement of Supported Algorithms . . . . . . . . . . . .   5
   4.  Advertisement of SRH Operation Limits . . . . . . . . . . . .   5
   5.  Advertisement of SRv6 Locator and End SIDs  . . . . . . . . .   5
   6.  SRv6 Locator LSA  . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  SRv6 Locator TLV  . . . . . . . . . . . . . . . . . . . .   8
   7.  Advertisment of SRv6 End SIDs . . . . . . . . . . . . . . . .  10
   8.  Advertisment of SRv6 SIDs Associated with Adjacencies . . . .  11
     8.1.  SRv6 End.X SID Sub-TLV  . . . . . . . . . . . . . . . . .  12
     8.2.  SRv6 LAN End.X SID Sub-TLV  . . . . . . . . . . . . . . .  14
   9.  SRv6 SID Structure sub-TLV  . . . . . . . . . . . . . . . . .  15
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  16
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
     11.1.  OSPF Router Information TLVs . . . . . . . . . . . . . .  17
     11.2.  OSPFv3 LSA Function Codes  . . . . . . . . . . . . . . .  17
     11.3.  OSPFv3 Extended-LSA sub-TLVs . . . . . . . . . . . . . .  17
     11.4.  OSPFv3 Locator LSA TLVs  . . . . . . . . . . . . . . . .  17
     11.5.  OSPFv3 Locator LSA sub-TLVs  . . . . . . . . . . . . . .  18
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  18
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  19
     13.2.  Informative References . . . . . . . . . . . . . . . . .  20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   Segment Routing (SR) architecture [RFC8402] specifies how a node can
   steer a packet through an ordered list of instructions, called
   segments.  These segments are identified through Segment Identifiers
   (SIDs).

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