BGP Link State Extensions for SRv6
draft-ietf-idr-bgpls-srv6-ext-00

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Last updated 2019-06-02
Replaces draft-dawra-idr-bgpls-srv6-ext
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Inter-Domain Routing                                       G. Dawra, Ed.
Internet-Draft                                                  LinkedIn
Intended status: Standards Track                             C. Filsfils
Expires: December 2, 2019                             K. Talaulikar, Ed.
                                                           Cisco Systems
                                                                 M. Chen
                                                                  Huawei
                                                              D. Bernier
                                                             Bell Canada
                                                             B. Decraene
                                                                  Orange
                                                            May 31, 2019

                   BGP Link State Extensions for SRv6
                    draft-ietf-idr-bgpls-srv6-ext-00

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 or functional sub-paths, called "segments".  These
   segments are advertised by the various protocols such as BGP, ISIS
   and OSPFv3.

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

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
   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/.

Dawra, et al.           Expires December 2, 2019                [Page 1]
Internet-Draft         BGP-LS Extensions for SRv6               May 2019

   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 December 2, 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  . . . . . . . . . . . . . . . . . . . . . . . .   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  . . . . . . . . . . . . . . . . . . .  11
     5.1.  SRv6 Locator TLV  . . . . . . . . . . . . . . . . . . . .  11
   6.  SRv6 SID NLRI . . . . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  SRv6 SID Information TLV  . . . . . . . . . . . . . . . .  15
   7.  SRv6 SID Attributes . . . . . . . . . . . . . . . . . . . . .  15
     7.1.  SRv6 Endpoint Function TLV  . . . . . . . . . . . . . . .  15
     7.2.  SRv6 BGP Peer Node SID TLV  . . . . . . . . . . . . . . .  16
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
     8.1.  BGP-LS NLRI-Types . . . . . . . . . . . . . . . . . . . .  18
     8.2.  BGP-LS TLVs . . . . . . . . . . . . . . . . . . . . . . .  18
   9.  Manageability Considerations  . . . . . . . . . . . . . . . .  19
   10. Operational Considerations  . . . . . . . . . . . . . . . . .  19
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