OSPFv2 Extensions for BIER
draft-ietf-bier-ospf-bier-extensions-18

Document Type Active Internet-Draft (bier WG)
Last updated 2018-06-04 (latest revision 2018-06-01)
Replaces draft-psenak-ospf-bier-extensions
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Stream WG state Submitted to IESG for Publication (wg milestone: Mar 2018 - Published as propose... )
Document shepherd Reshad Rahman
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IESG IESG state RFC Ed Queue
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Send notices to Reshad Rahman <rrahman@cisco.com>, aretana.ietf@gmail.com
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OSPF                                                      P. Psenak, Ed.
Internet-Draft                                                  N. Kumar
Intended status: Standards Track                            IJ. Wijnands
Expires: December 3, 2018                                          Cisco
                                                             A. Dolganow
                                                                   Nokia
                                                           T. Przygienda
                                                                J. Zhang
                                                  Juniper Networks, Inc.
                                                               S. Aldrin
                                                            Google, Inc.
                                                            June 1, 2018

                       OSPFv2 Extensions for BIER
              draft-ietf-bier-ospf-bier-extensions-18.txt

Abstract

   Bit Index Explicit Replication (BIER) is an architecture that
   provides multicast forwarding through a "BIER domain" without
   requiring intermediate routers to maintain multicast related per-flow
   state.  Neither does BIER require an 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 router
   adds a BIER header to the packet.  Such header contains a bit-string
   in which each bit represents exactly one BFER to forward the packet
   to.  The set of BFERs to which the multicast packet needs to be
   forwarded is expressed by the according set of bits set in BIER
   packet header.

   This document describes the OSPF [RFC2328] protocol extension
   required for BIER with MPLS encapsulation [RFC8296].  Support for
   other encapsulation types is outside thescope of this document.  The
   use of multiple encapsulation types is outside the scope of this
   document.

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 https://datatracker.ietf.org/drafts/current/.

Psenak, et al.          Expires December 3, 2018                [Page 1]
Internet-Draft         OSPFv2 Extensions for BIER              June 2018

   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 December 3, 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.  Flooding of the BIER Information in OSPF  . . . . . . . . . .   3
     2.1.  BIER Sub-TLV  . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  BIER MPLS Encapsulation Sub-TLV . . . . . . . . . . . . .   5
     2.3.  Flooding scope of BIER Information  . . . . . . . . . . .   6
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   5.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   Bit Index Explicit Replication (BIER) is an architecture that
   provides optimal multicast forwarding through a "BIER domain" without
   requiring intermediate routers to maintain any multicast related per-
   flow state.  Neither does BIER explicitly require a 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 router adds a BIER header to the packet.  The BIER header
   contains a bit-string in which each bit represents exactly one BFER
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