BIER Migration Frameworks
draft-przygienda-bier-migration-options-00

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BIER                                                       A. Przygienda
Internet-Draft                                                  Z. Zhang
Intended status: Standards Track                        Juniper Networks
Expires: December 23, 2018                                  Jun 21, 2018

                       BIER Migration Frameworks
               draft-przygienda-bier-migration-options-00

Abstract

   BIER is a new architecture for the forwarding and replication of
   multicast data packets.  This document defines possible approaches to
   introduce BIER into networks consisting of a mixture of BFRs and non-
   BFRs and their respective preconditions and properties.

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
   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/.

   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 23, 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

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Internet-Draft               BIER Migration                     Jun 2018

   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.  `Naked` MT  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Preconditions . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Properties  . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  RFC8279 Section 6.9 . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Preconditions . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Properties  . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  BIER Specific Algorithm Based Solutions . . . . . . . . . . .   6
     4.1.  Preconditions . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Properties  . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Controller Based Solutions  . . . . . . . . . . . . . . . . .   7
     5.1.  Preconditions . . . . . . . . . . . . . . . . . . . . . .   7
     5.2.  Properties  . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   BIER [RFC8279] is a new architecture for the forwarding of multicast
   data packets.  It allows replication through a "multicast domain" and
   it does not precondition construction of a multicast distribution
   tree, nor does it precondition intermediate nodes to maintain any
   per-flow state.

   Given that BIER encompasses a novel switching path it can be
   reasonably expected that in many deployment scenarios, at least
   initially, a mixture of BFRs and non-BFR (i.e. routers having all or
   some of the interfaces not being capable of BIER forwarding) will be
   used and represent what we will call "mixed environments".  [RFC8279]
   offers several suggestions how a mixture of such routers can be
   handled in the network.  The purpose of this memo is to cover other
   possible deployment options with explanation what preconditions are
   necessary to apply each of those and what properties and requirements
   they bring in operational considerations respectively.

   The presented sequence of possible solutions follows very loosely an
   ordering starting with the ones that use "least" amount of additional
   technologies beside BIER to deploy a "mixed environment".  This

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