BGP Link State Extensions for SRv6
draft-ietf-idr-bgpls-srv6-ext-05

Document Type Active Internet-Draft (idr WG)
Authors Gaurav Dawra  , Clarence Filsfils  , Ketan Talaulikar  , Mach Chen  , daniel.bernier@bell.ca  , Bruno Decraene 
Last updated 2020-11-17 (latest revision 2020-11-14)
Replaces draft-dawra-idr-bgpls-srv6-ext
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Inter-Domain Routing                                            G. Dawra
Internet-Draft                                                  LinkedIn
Intended status: Standards Track                             C. Filsfils
Expires: May 17, 2021                                 K. Talaulikar, Ed.
                                                           Cisco Systems
                                                                 M. Chen
                                                                  Huawei
                                                              D. Bernier
                                                             Bell Canada
                                                             B. Decraene
                                                                  Orange
                                                       November 13, 2020

                   BGP Link State Extensions for SRv6
                    draft-ietf-idr-bgpls-srv6-ext-05

Abstract

   Segment Routing (SR) over IPv6 (SRv6) allows for a flexible
   definition of end-to-end paths within various topologies by encoding
   paths as sequences of topological or functional sub-paths, called
   "segments".  These segments are advertised by the various protocols
   such as BGP, IS-IS and OSPFv3.

   BGP Link-state (BGP-LS) address-family solution for SRv6 is similar
   to BGP-LS for SR for MPLS data-plane.  This draft defines extensions
   to the BGP-LS to advertise SRv6 Segments along with their behaviors
   and other attributes via BGP.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 17, 2021.

Dawra, et al.             Expires May 17, 2021                  [Page 1]
Internet-Draft         BGP-LS Extensions for SRv6          November 2020

Copyright Notice

   Copyright (c) 2020 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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  BGP-LS Extensions for SRv6  . . . . . . . . . . . . . . . . .   4
   3.  SRv6 Node Attributes  . . . . . . . . . . . . . . . . . . . .   5
     3.1.  SRv6 Capabilities TLV . . . . . . . . . . . . . . . . . .   5
     3.2.  SRv6 Node MSD Types . . . . . . . . . . . . . . . . . . .   6
   4.  SRv6 Link Attributes  . . . . . . . . . . . . . . . . . . . .   7
     4.1.  SRv6 End.X SID TLV  . . . . . . . . . . . . . . . . . . .   7
     4.2.  SRv6 LAN End.X SID TLV  . . . . . . . . . . . . . . . . .   9
     4.3.  SRv6 Link MSD Types . . . . . . . . . . . . . . . . . . .  11
   5.  SRv6 Prefix Attributes  . . . . . . . . . . . . . . . . . . .  12
     5.1.  SRv6 Locator TLV  . . . . . . . . . . . . . . . . . . . .  12
   6.  SRv6 SID NLRI . . . . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  SRv6 SID Information TLV  . . . . . . . . . . . . . . . .  14
   7.  SRv6 SID Attributes . . . . . . . . . . . . . . . . . . . . .  15
     7.1.  SRv6 Endpoint Behavior TLV  . . . . . . . . . . . . . . .  15
     7.2.  SRv6 BGP Peer Node SID TLV  . . . . . . . . . . . . . . .  16
   8.  SRv6 SID Structure TLV  . . . . . . . . . . . . . . . . . . .  18
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
     9.1.  BGP-LS NLRI-Types . . . . . . . . . . . . . . . . . . . .  19
     9.2.  BGP-LS TLVs . . . . . . . . . . . . . . . . . . . . . . .  19
   10. Manageability Considerations  . . . . . . . . . . . . . . . .  20
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  21
   12. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  22
   13. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  22
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  23
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