BIER BFD
draft-ietf-bier-bfd-00

Document Type Active Internet-Draft (bier WG)
Authors Quan Xiong  , Greg Mirsky  , fangwei hu  , Chang Liu 
Last updated 2020-11-15 (latest revision 2020-11-12)
Replaces draft-hu-bier-bfd
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BIER WG                                                       Quan Xiong
Internet-Draft                                               Greg Mirsky
Intended status: Standards Track                         ZTE Corporation
Expires: February 6, 2021                                     Fangwei Hu
                                                              Individual
                                                               Chang Liu
                                                            China Unicom
                                                          August 5, 2020

                                BIER BFD
                       draft-ietf-bier-bfd-00.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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   This Internet-Draft will expire on February 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
   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

Quan Xiong, et al.      Expires February 6, 2021                [Page 1]
Internet-Draft                  BIER BFD                     August 2020

   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  . . . . . . . . . . . . . . . . .   4
     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
     6.1.  Unsolicited Head Notification Mode  . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  BIER OAM Message Type . . . . . . . . . . . . . . . . . .   8
     9.2.  BFD Discriminator TLV . . . . . . . . . . . . . . . . . .   8
     9.3.  BIER BFD Sub-sub-TLV  . . . . . . . . . . . . . . . . . .   8
     9.4.  BIER BFD Sub-TLV  . . . . . . . . . . . . . . . . . . . .   9
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     10.2.  Informative References . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

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