BIER BFD
draft-hu-bier-bfd-02

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Last updated 2018-10-11
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BIER WG                                                       Fangwei Hu
Internet-Draft                                               Greg Mirsky
Intended status: Standards Track                              Quan Xiong
Expires: April 14, 2019                                  ZTE Corporation
                                                               Chang Liu
                                                            China Unicom
                                                            Oct 11, 2018

                                BIER BFD
                        draft-hu-bier-bfd-02.txt

Abstract

   Point to multipoint (P2MP) BFD is designed to verify multipoint
   connectivity.  This document specifies the application of P2MP BFD in
   BIER network.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 14, 2019.

Copyright Notice

   Copyright (c) 2018 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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   (https://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of

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   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.  BIER BFD Encapsulation  . . . . . . . . . . . . . . . . . . .   3
   4.  Bootstrapping BIER BFD  . . . . . . . . . . . . . . . . . . .   3
   5.  Discriminators and Packet Demultiplexing  . . . . . . . . . .   3
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   Bit Index Explicit Replication(BIER)[RFC8279] provides optimal
   forwarding of multicast data packets through a multicast domain.  It
   does so without requiring any explicit tree-building protocol and
   without requiring intermediate nodes to maintain any per-flow state.

   [I-D.ietf-bfd-multipoint] defines a method of using Bidirectional
   Detection(BFD) to monitor and detect unicast failures between the
   sender (head) and one or more receivers (tails) in multipoint or
   multicast networks.

   This document describes the procedures for using such mode of BFD
   protocol to verify multipoint or multicast connectivity between a
   multipoint sender (the "head", Bit-Forwarding Ingress Routers(BFIRs))
   and a set of one or more multipoint receivers (the"tails", Bit-
   Forwarding Egress Routers(BFERs)).  The BIER BFD only supports the
   unidirectional multicast.  This document defines the use of BFD, as
   defined in [I-D.ietf-bfd-multipoint], for BIER domain.  Use of BFD
   for multipoint networks active tail
   [I-D.ietf-bfd-multipoint-active-tail] is for further study.

2.  Conventions used in this document

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2.1.  Terminology

   This document uses the acronyms defined in [RFC8279] along with the
   following:

   BFD: Bidirectional Forwarding Detection.

   OAM: Operations, Administration, and Maintenance.

   P2MP: Point to Multi-Point.

2.2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
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