Multipoint LDP Extension for P2MP-based BIER
draft-xie-mpls-ldp-bier-extension-01

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Last updated 2018-09-05
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Network Working Group                                             J. Xie
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                 M. Chen
Expires: March 9, 2019                                             R. Li
                                                                  Huawei
                                                       September 5, 2018

              Multipoint LDP Extension for P2MP-based BIER
                  draft-xie-mpls-ldp-bier-extension-01

Abstract

   Bit Index Explicit Replication (BIER) is a new architecture that
   provides optimal multicast forwarding without requiring intermediate
   routers to maintain any per-flow state by using a multicast-specific
   BIER header.  An extension to the Label Distribution Protocol (LDP)
   defined in [RFC5036] for the setup of point-to-multipoint (P2MP) is
   described in [RFC6388] is called mLDP, and is used for multicast-
   specific tree building.  This document describes mLDP extensions to
   setup a P2MP with BIER information, which is called P2MP based BIER
   in [I-D.xie-bier-mvpn-mpls-p2mp].

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].

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 March 9, 2019.

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Internet-Draft           LDP Extension for BIER           September 2018

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
   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
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  MLDP P2MP BIER Signalling . . . . . . . . . . . . . . . . . .   4
     3.1.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  Signaling the P2MP BIER . . . . . . . . . . . . . . . . .   5
     3.4.  The P2MP BIER LSP Identifier  . . . . . . . . . . . . . .   5
     3.5.  BIER TLV  . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.6.  Make Before Break (MBB) . . . . . . . . . . . . . . . . .   7
   4.  Capability and Error handling . . . . . . . . . . . . . . . .   7
     4.1.  BIER Capability . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  BIER Status . . . . . . . . . . . . . . . . . . . . . . .   8
     4.3.  Check Capability and Use Status for Error Handling  . . .   9
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   Bit Index Explicit Replication (BIER) is a new architecture that
   provides optimal multicast forwarding without requiring intermediate
   routers to maintain any per-flow state by using a multicast-specific
   BIER header.  An extension to the Label Distribution Protocol (LDP)
   defined in [RFC5036] for the setup of point-to-multipoint (P2MP) is
   described in [RFC6388] is called mLDP, and is used for multicast-
   specific tree building.  This document describes mLDP extensions to

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