The Resilience for BIER
draft-xiong-bier-resilience-02

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BIER WG                                                       Quan Xiong
Internet-Draft                                               Greg Mirsky
Intended status: Informational                           ZTE Corporation
Expires: September 7, 2019                                    Fangwei Hu
                                                              Individual
                                                           March 6, 2019

                        The Resilience for BIER
                   draft-xiong-bier-resilience-02.txt

Abstract

   Bit Index Explicit Replication (BIER) is an architecture for the
   forwarding of multicast data packets.  In some scenarios, the
   resilience should be provided to guarantee the multicast data is
   protected by a given backup resource and forwarded successfully to
   the receivers in BIER-specific network.

   This document discusses the resilience use cases, requirements and
   proposes solutions for BIER, including the protection and restoration
   mechanisms and detection methods.

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
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   This Internet-Draft will expire on September 7, 2019.

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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

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   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
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  BIER Resilience Use Cases . . . . . . . . . . . . . . . . . .   3
     2.1.  BIER End-to-End 1+1 Protection  . . . . . . . . . . . . .   3
     2.2.  BIER End-to-End Restoration . . . . . . . . . . . . . . .   4
     2.3.  BIER Link Protection  . . . . . . . . . . . . . . . . . .   5
   3.  Management and Control Considerations . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informational References  . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   [RFC8279] defined Bit Index Explicit Replication (BIER) architecture
   as a solution for the forwarding of multicast data packets.  The
   routers which support BIER are known as Bit-Forwarding Router (BFR)
   and the multicast data packet enters a BIER domain at a Bit-
   Forwarding Ingress Router (BFIR) and leaves at one or more Bit-
   Forwarding Egress Routers (BFERs).

   [I-D.eckert-bier-te-frr] provides some protection mechanisms for
   traffic engineering in a BIER domain.  However, there is no mechanism
   to protect multicast traffic against BIER-specific network failures.
   In some scenarios, the resilience should be provided to guarantee the
   multicast data is protected by a given backup resource and forwarded
   successfully to the receivers in BIER-specific network.

   This document describes the resilience use cases and requirements for
   BIER-specific network and discusses the protection and restoration
   mechanisms and detection methods.

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1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
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