OSPFv3 Extensions for SRv6
draft-li-ospf-ospfv3-srv6-extensions-02

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Last updated 2018-09-03
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Network Working Group                                              Z. Li
Internet-Draft                                                     Z. Hu
Intended status: Standards Track                                D. Cheng
Expires: March 7, 2019                               Huawei Technologies
                                                           K. Talaulikar
                                                               P. Psenak
                                                           Cisco Systems
                                                       September 3, 2018

                       OSPFv3 Extensions for SRv6
                draft-li-ospf-ospfv3-srv6-extensions-02

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", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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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   This Internet-Draft will expire on March 7, 2019.

Li, et al.                Expires March 7, 2019                 [Page 1]
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Copyright Notice

   Copyright (c) 2018 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.  OSPFv3 Extensions for SRv6  . . . . . . . . . . . . . . . . .   3
     2.1.  SRv6-Capabilities TLV . . . . . . . . . . . . . . . . . .   3
       2.1.1.  Maximum SL Sub-TLV  . . . . . . . . . . . . . . . . .   5
       2.1.2.  Maximum End Pop SRH Sub-TLV . . . . . . . . . . . . .   5
       2.1.3.  Maximum T.Insert SRH Sub-TLV  . . . . . . . . . . . .   6
       2.1.4.  Maximum T.Encap SRH Sub-TLV . . . . . . . . . . . . .   6
       2.1.5.  Maximum End D SRH Sub-TLV . . . . . . . . . . . . . .   7
     2.2.  SRv6 Node SID TLV . . . . . . . . . . . . . . . . . . . .   8
     2.3.  SRv6 SIDs Associated with Adjacencies . . . . . . . . . .  10
       2.3.1.  SRv6 SID Link Attribute Sub-TLV . . . . . . . . . . .  11
       2.3.2.  SRv6 SID LAN Link Attribute Sub-TLV . . . . . . . . .  12
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
     4.1.  OSPF Parameters . . . . . . . . . . . . . . . . . . . . .  14
     4.2.  OSPFv3 Parameters . . . . . . . . . . . . . . . . . . . .  14
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   Segment Routing (SR) architecture [I-D.ietf-spring-segment-routing]
   specifies how a node can steer a packet through an ordered list of
   instructions, called segments.  These segments are identified through
   Segment Identifiers (SIDs).

   Segment Routing can be instantiated on the IPv6 data plane through
   the use of the Segment Routing Header (SRH) defined in

Li, et al.                Expires March 7, 2019                 [Page 2]
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   [I-D.ietf-6man-segment-routing-header].  SRv6 refers to this SR
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