BFD for Multipoint Networks over Point-to-Multi-Point MPLS LSP
draft-mirsky-mpls-p2mp-bfd-12

Document Type Active Internet-Draft (mpls WG)
Authors Greg Mirsky  , Gyan Mishra  , Donald Eastlake 
Last updated 2020-11-02
Stream IETF
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MPLS Working Group                                             G. Mirsky
Internet-Draft                                                 ZTE Corp.
Intended status: Standards Track                               G. Mishra
Expires: May 6, 2021                                        Verizon Inc.
                                                             D. Eastlake
                                                  Futureway Technologies
                                                        November 2, 2020

     BFD for Multipoint Networks over Point-to-Multi-Point MPLS LSP
                     draft-mirsky-mpls-p2mp-bfd-12

Abstract

   This document describes procedures for using Bidirectional Forwarding
   Detection (BFD) for multipoint networks to detect data plane failures
   in Multiprotocol Label Switching (MPLS) point-to-multipoint (p2mp)
   Label Switched Paths (LSPs) using active tails with unsolicited
   notifications mode.  It also describes the applicability of LSP Ping,
   as in-band, and the control plane, as out-band, solutions to
   bootstrap a BFD session in this environment.

Status of This Memo

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   This Internet-Draft will expire on May 6, 2021.

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
   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

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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   2
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   3.  Multipoint BFD Encapsulation  . . . . . . . . . . . . . . . .   3
     3.1.  IP Encapsulation of Multipoint BFD  . . . . . . . . . . .   4
     3.2.  Non-IP Encapsulation of Multipoint BFD  . . . . . . . . .   4
   4.  Bootstrapping Multipoint BFD  . . . . . . . . . . . . . . . .   5
     4.1.  LSP Ping  . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Operation of Multipoint BFD with Active Tail over P2MP
           MPLS LSP  . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Control Plane . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   [RFC8562] defines a method of using Bidirectional Detection (BFD)
   [RFC5880] to monitor and detect unicast failures between the sender
   (head) and one or more receivers (tails) in multipoint or multicast
   networks.  [RFC8562] added two BFD session types - MultipointHead and
   MultipointTail.  Throughout this document, MultipointHead and
   MultipointTail refer to the value of the bfd.SessionType is set on a
   BFD endpoint.  This document describes procedures for using such
   modes of BFD protocol to detect data plane failures in Multiprotocol
   Label Switching (MPLS) point-to-multipoint (p2mp) Label Switched
   Paths (LSPs).  The document also describes the applicability of out-
   band solutions to bootstrap a BFD session in this environment.

2.  Conventions used in this document

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