BIER Ethernet
draft-wang-bier-ethernet-02

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BIER WG                                                          C. Wang
Internet-Draft                                                  Z. Zhang
Intended status: Standards Track                         ZTE Corporation
Expires: March 22, 2017                                            A. Qu
                                                      September 18, 2016

                             BIER Ethernet
                      draft-wang-bier-ethernet-02

Abstract

   Bit Index Explicit Replication (BIER) [I-D.ietf-bier-architecture] is
   an architecture that provides optimal multicast forwarding through a
   "BIER domain" without requiring intermediate routers to maintain any
   multicast related per-flow state.  BIER also does not require any
   explicit tree-building protocol for its operation.  When a multicast
   data packet enters the BIER domain, the BFIR determines the BFERs to
   which the packet needs to be sent.  Then the BFIR encapsulates the
   packet in a BIER header and forwards the packet according to the
   BIFTs.  Currently, there is a BIER-MPLS solution to transmit
   multicast traffic using MPLS label indication.  Alternatively, this
   document tries to propose a solution named BIER Ethernet to support
   BIER forwarding in Ethernet 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 March 22, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Wang, et al.             Expires March 22, 2017                 [Page 1]
Internet-Draft                BIER Ethernet               September 2016

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Convention and Terminology  . . . . . . . . . . . . . . . . .   3
   3.  BIER Ethernet Header  . . . . . . . . . . . . . . . . . . . .   3
   4.  Imposing and processing the BIER Ethernet header  . . . . . .   5
   5.  Control Plane Considerations about BIER Ethernet  . . . . . .   6
   6.  BIER Ethernet Considerations  . . . . . . . . . . . . . . . .   7
     6.1.  BIER Ethernet for Traffic Enginerring . . . . . . . . . .   7
     6.2.  BIER Ethernet for Multicast VPN . . . . . . . . . . . . .   7
   7.  Assignment Considerations . . . . . . . . . . . . . . . . . .   8
     7.1.  IEEE Registration Authority Considerations  . . . . . . .   8
     7.2.  IANA Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   Bit Index Explicit Replication (BIER) [I-D.ietf-bier-architecture] is
   an architecture that provides optimal multicast forwarding through a
   "BIER domain" without requiring intermediate routers to maintain any
   multicast related per-flow state.  BIER also does not require any
   explicit tree-building protocol for its operation.  A multicast data
   packet enters a BIER domain at a "Bit-Forwarding Ingress Router"
   (BFIR), and leaves the BIER domain at one or more "Bit-Forwarding
   Egress Routers" (BFERs).  The BFIR encapsulates a BIER header to the
   packet.  The BIER header contains a BitString in which each bit
   represents exactly one BFER to forward the packet to.

   Specifically, after encapsulating a BIER header to the original
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