BIER BFD
draft-hu-bier-bfd-04

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Last updated 2019-07-03
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BIER WG                                                       Quan Xiong
Internet-Draft                                               Greg Mirsky
Intended status: Standards Track                         ZTE Corporation
Expires: January 4, 2020                                      Fangwei Hu
                                                              Individual
                                                               Chang Liu
                                                            China Unicom
                                                            July 3, 2019

                                BIER BFD
                        draft-hu-bier-bfd-04.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
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   This Internet-Draft will expire on January 4, 2020.

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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   (https://trustee.ietf.org/license-info) in effect on the date of
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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 . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   3.  BIER BFD Encapsulation  . . . . . . . . . . . . . . . . . . .   3
   4.  BIER BFD Session Bootstrapping  . . . . . . . . . . . . . . .   3
     4.1.  BIER OAM Bootstrapping  . . . . . . . . . . . . . . . . .   3
     4.2.  IGP protocol Bootstrapping  . . . . . . . . . . . . . . .   4
       4.2.1.  IS-IS extension for BIER BFD  . . . . . . . . . . . .   4
       4.2.2.  OSPF extension for BIER BFD . . . . . . . . . . . . .   5
   5.  Discriminators and Packet Demultiplexing  . . . . . . . . . .   6
   6.  Active Tail in BIER BFD . . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Bit Index Explicit Replication (BIER) [RFC8279] provides 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.

   [RFC8562] defines a method of using Bidirectional Forwarding
   Detection (BFD) to monitor and detect unicast failures between the
   sender (head) and one or more receivers (tails) in multipoint or
   multicast networks.  [RFC8563] describes active tail extensions to
   the BFD protocol for multipoint networks.

   This document describes the procedures for using such mode of BFD
   protocol to monitor connectivity between a multipoint sender, Bit-
   Forwarding Ingress Router (BFIR), and a set of one or more multipoint
   receivers,Bit-Forwarding Egress Routers (BFERs).  The BIER BFD only
   supports the unidirectional multicast.  This document defines the use
   of P2MP BFD as per [RFC8562], and active tail as per [RFC8563] for
   BIER-specific domain.

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