BGP Link State extensions for IPv6 Segment Routing(SRv6)
draft-dawra-idr-bgpls-srv6-ext-00

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Inter-Domain Routing
Internet-Draft
Intended status: Standards Track                           G. Dawra, Ed.
Expires: May 1, 2018                                         C. Filsfils
                                                           K. Talaulikar
                                                          A. Sreekantiah
                                                             L. Ginsberg
                                                           Cisco Systems
                                                        October 28, 2017

        BGP Link State extensions for IPv6 Segment Routing(SRv6)
                 draft-dawra-idr-bgpls-srv6-ext-00.txt

Abstract

   Segment Routing IPv6(SRv6) allows for a flexible definition of end-
   to-end paths within various topologies by encoding paths as sequences
   of topological sub-paths, called "segments".  These segments are
   advertised by the various protocols such as (BGP, IGP, BGP-LS etc).

   BGP Link-state(BGP-LS) address-family solution for SRv6 is consistent
   with BGP-LS for SR-MPLS [I-D.ietf-idr-bgp-ls-segment-routing-ext].
   This draft defines extensions to the BGP-LS to carry SR/SRv6
   Segments, Services and function information via BGP.

Status of This Memo

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Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Dawra, et al.              Expires May 1, 2018                  [Page 1]
Internet-Draft         BGP-LS Extensions for SRv6           October 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  BGP-LS extensions for SRv6  . . . . . . . . . . . . . . . . .   3
     2.1.  SRv6 Node Attributes  . . . . . . . . . . . . . . . . . .   3
       2.1.1.  SRv6 Capability Attribute TLV . . . . . . . . . . . .   4
       2.1.2.  SID TLV . . . . . . . . . . . . . . . . . . . . . . .   7
     2.2.  SRv6 Link Attributes  . . . . . . . . . . . . . . . . . .   8
       2.2.1.  SRv6 P2P X-SID TLV  . . . . . . . . . . . . . . . . .   8
       2.2.2.  SRv6 LAN X-SID TLV  . . . . . . . . . . . . . . . . .   9
     2.3.  Function Sub-TLV  . . . . . . . . . . . . . . . . . . . .  10
   3.  Function Mapping Summary  . . . . . . . . . . . . . . . . . .  11
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
     4.1.  TLV/Sub-TLV Code Points Summary . . . . . . . . . . . . .  12
     4.2.  Segment routing function Identifier(SFI)  . . . . . . . .  13
   5.  Manageability Considerations  . . . . . . . . . . . . . . . .  13
   6.  Operational Considerations  . . . . . . . . . . . . . . . . .  13
     6.1.  Operations  . . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   8.  Conclusions . . . . . . . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Appendix A.  Contributors . . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   SRv6 refers to Segment Routing instantiated on the IPv6 dataplane
   [I-D.ietf-spring-segment-routing].

   The network programming paradigm
   [I-D.filsfils-spring-srv6-network-programming] is central to SRv6.
   It describes how any function can be bound to a SID and how any
   network program can be expressed as a combination of SID's.

   "SID" (abbreviation for Segment Identifier) is often used as a
   shorter reference for "SRv6 Segment".  An SRv6-capable node N

Dawra, et al.              Expires May 1, 2018                  [Page 2]
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