OSPFv3 Extensions for SRv6
draft-li-ospf-ospfv3-srv6-extensions-00

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Last updated 2017-10-19
Replaced by draft-li-lsr-ospfv3-srv6-extensions
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Network Working Group                                              Z. Li
Internet-Draft                                                     Z. Hu
Intended status: Standards Track                                D. Cheng
Expires: April 22, 2018                              Huawei Technologies
                                                        October 19, 2017

                       OSPFv3 Extensions for SRv6
                draft-li-ospf-ospfv3-srv6-extensions-00

Abstract

   Segment routing architecture (refer to
   [I-D.ietf-spring-segment-routing]) can be implemented over a MPLS
   data plane, an IPv4 data plane, as well as an IPv6 data plane.
   [I-D.filsfils-spring-srv6-network-programming] introduces the network
   programming concept in IPv6 data plane using segment routing
   technology, called SRv6, and it also defines some basic functions.
   The SRv6 functions can be advertised by routing protocols including
   OSPFv3, IS-IS and BGP-LS.  This draft proposes some extensions to
   OSPFv3 ([RFC5340]) required to support 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 April 22, 2018.

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Copyright Notice

   Copyright (c) 2017 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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  OSPFv3 Extensions for SRv6  . . . . . . . . . . . . . . . . .   4
     2.1.  SRv6-Capabilities Sub-TLV . . . . . . . . . . . . . . . .   4
       2.1.1.  Maximum SL Sub-Sub-TLV  . . . . . . . . . . . . . . .   5
       2.1.2.  Maximum End Pop SRH Sub-Sub-TLV . . . . . . . . . . .   6
       2.1.3.  Maximum T.Insert SRH Sub-Sub-TLV  . . . . . . . . . .   7
       2.1.4.  Maximum T.Encap SRH Sub-Sub-TLV . . . . . . . . . . .   7
       2.1.5.  Maximum End D SRH Sub-Sub-TLV . . . . . . . . . . . .   8
     2.2.  SRv6 Function Descriptor  . . . . . . . . . . . . . . . .   9
     2.3.  SRv6 Function Code Points . . . . . . . . . . . . . . . .  10
     2.4.  SRv6 SID TLV  . . . . . . . . . . . . . . . . . . . . . .  11
     2.5.  SRv6 Neighbor SID TLV . . . . . . . . . . . . . . . . . .  12
       2.5.1.  Point to Popint SRv6 Adj-SID Sub-TLV  . . . . . . . .  13
       2.5.2.  LAN SRv6 Adj-SID sub-TLV  . . . . . . . . . . . . . .  14
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
     4.1.  OSPFv3 Extensions for SRv6 Support  . . . . . . . . . . .  15
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   This document proposes some extensions to OSPFv3 in order to support
   SRv6 as defined in [I-D.filsfils-spring-srv6-network-programming],
   and they are as follows:

   1.  SRv6-Capabilities Sub-TLV: Refer to Section 2.1.  This Sub-TLV is
       used to announce the capability of an OSPFv3 router for SRv6

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       support with a list of parameters.  This Sub-TLV, if used, is
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