Encapsulation for Bit Index Explicit Replication in MPLS Networks
draft-ietf-bier-mpls-encapsulation-02

The information below is for an old version of the document
Document Type Active Internet-Draft (bier WG)
Last updated 2015-08-31
Replaces draft-wijnands-mpls-bier-encapsulation
Stream IETF
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
Internet Engineering Task Force                        IJ. Wijnands, Ed.
Internet-Draft                                       Cisco Systems, Inc.
Intended status: Standards Track                           E. Rosen, Ed.
Expires: March 3, 2016                            Juniper Networks, Inc.
                                                             A. Dolganow
                                                          Alcatel-Lucent
                                                             J. Tantsura
                                                                Ericsson
                                                               S. Aldrin
                                                            Google, Inc.
                                                         August 31, 2015

   Encapsulation for Bit Index Explicit Replication in MPLS Networks
                 draft-ietf-bier-mpls-encapsulation-02

Abstract

   Bit Index Explicit Replication (BIER) is an architecture that
   provides optimal multicast forwarding through a "multicast domain",
   without requiring intermediate routers to maintain any per-flow state
   or to engage in an explicit tree-building protocol.  When a multicast
   data packet enters the domain, the ingress router determines the set
   of egress routers to which the packet needs to be sent.  The ingress
   router then encapsulates the packet in a BIER header.  The BIER
   header contains a bitstring in which each bit represents exactly one
   egress router in the domain; to forward the packet to a given set of
   egress routers, the bits corresponding to those routers are set in
   the BIER header.  The details of the encapsulation depend on the type
   of network used to realize the multicast domain.  This document
   specifies the BIER encapsulation to be used in an MPLS 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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 3, 2016.

Wijnands, et al.          Expires March 3, 2016                 [Page 1]
Internet-Draft           BIER MPLS Encapsulation             August 2015

Copyright Notice

   Copyright (c) 2015 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
   (http://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.  The BIER-MPLS Label . . . . . . . . . . . . . . . . . . . . .   3
   3.  BIER Header . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Imposing and Processing the BIER Encapsulation  . . . . . . .   8
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   8.  Contributor Addresses . . . . . . . . . . . . . . . . . . . .  11
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   [BIER_ARCH] describes a new architecture for the forwarding of
   multicast data packets.  That architecture provides optimal
   forwarding of multicast data packets through a "multicast domain".
   However, it does not require any explicit tree-building protocol, and
   does not require intermediate nodes to maintain any per-flow state.
   That architecture is known as "Bit Index Explicit Replication"
   (BIER).

   This document will use terminology defined in [BIER_ARCH].

   A router that supports BIER is known as a "Bit-Forwarding Router"
   (BFR).  A "BIER domain" is a connected set of Bit-Forwarding Routers
   (BFRs), each of which has been assigned a BFR-prefix.  A BFR-prefix
Show full document text