BGP Link-State Extensions for Seamless BFD
draft-ietf-idr-bgp-ls-sbfd-extensions-02

Document Type Active Internet-Draft (idr WG)
Authors Zhenbin Li  , Shunwan Zhuang  , Ketan Talaulikar  , Sam Aldrin  , Jeff Tantsura  , Greg Mirsky 
Last updated 2020-07-14 (latest revision 2020-05-06)
Replaces draft-li-idr-bgp-ls-sbfd-extensions
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Inter-Domain Routing                                               Z. Li
Internet-Draft                                                 S. Zhuang
Intended status: Standards Track                                  Huawei
Expires: November 7, 2020                                  K. Talaulikar
                                                           Cisco Systems
                                                               S. Aldrin
                                                             Google, Inc
                                                             J. Tantsura
                                                                  Apstra
                                                               G. Mirsky
                                                               ZTE Corp.
                                                             May 6, 2020

               BGP Link-State Extensions for Seamless BFD
                draft-ietf-idr-bgp-ls-sbfd-extensions-02

Abstract

   Seamless Bidirectional Forwarding Detection (S-BFD) defines a
   simplified mechanism to use Bidirectional Forwarding Detection (BFD)
   with large portions of negotiation aspects eliminated, thus providing
   benefits such as quick provisioning as well as improved control and
   flexibility to network nodes initiating the path monitoring.  The
   link-state routing protocols (IS-IS and OSPF) have been extended to
   advertise the Seamless BFD (S-BFD) Discriminators.

   This draft defines extensions to the BGP Link-state address-family to
   carry the S-BFD Discriminators information 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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 7, 2020.

Li, et al.              Expires November 7, 2020                [Page 1]
Internet-Draft         BGP-LS Extensions for S-BFD              May 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Problem and Requirement . . . . . . . . . . . . . . . . . . .   3
   4.  BGP-LS Extensions for S-BFD Discriminator . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Manageability Considerations  . . . . . . . . . . . . . . . .   6
     6.1.  Operational Considerations  . . . . . . . . . . . . . . .   6
     6.2.  Management Considerations . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Seamless Bidirectional Forwarding Detection (S-BFD) [RFC7880] defines
   a simplified mechanism to use Bidirectional Forwarding Detection
   (BFD) [RFC5880] with large portions of negotiation aspects
   eliminated, thus providing benefits such as quick provisioning as
   well as improved control and flexibility to network nodes initiating
   the path monitoring.

   For monitoring of a service path end-to-end via S-BFD, the headend/
   initiator node needs to know the S-BFD Discriminator of the
   destination/tail-end node of that service.  The link-state routing
   protocols (IS-IS, OSPF and OSPFv3) have been extended to advertise
   the S-BFD Discriminators.  With this a initiator node can learn the
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