The Resilience for BIER
draft-xiong-bier-resilience-01

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BIER WG                                                       Quan Xiong
Internet-Draft                                                Fangwei Hu
Intended status: Standards Track                             Greg Mirsky
Expires: April 15, 2019                                  ZTE Corporation
                                                        October 12, 2018

                        The Resilience for BIER
                   draft-xiong-bier-resilience-01.txt

Abstract

   Bit Index Explicit Replication (BIER) is an architecture that
   specifies a solution 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 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 April 15, 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
   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
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  BIER Resilience Use Cases . . . . . . . . . . . . . . . . . .   3
     3.1.  End-to-End 1+1 Protection . . . . . . . . . . . . . . . .   3
     3.2.  End-to-End 1:1 Protection . . . . . . . . . . . . . . . .   4
     3.3.  BIER Link Protection  . . . . . . . . . . . . . . . . . .   5
   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] introduces Bit Index Explicit Replication (BIER)
   architecture and specifies 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 leave at one or
   more Bit-Forwarding Egress Routers (BFERs).

   [I-D.eckert-bier-te-frr] provides some protection mechanisms for
   traffic engineering of BIER.  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 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
   document are to be interpreted as described in [RFC2119].
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