Global vpnid advertisement in BIER overlay
draft-pengzhang-bier-global-vpnid-00

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Last updated 2018-06-28
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BIER                                                        Shaofu. Peng
Internet-Draft                                              Zheng. Zhang
Intended status: Standards Track                         ZTE Corporation
Expires: December 30, 2018                                 June 28, 2018

               Global vpnid advertisement in BIER overlay
                  draft-pengzhang-bier-global-vpnid-00

Abstract

   This document specifies a method to achieve multipoint VPN
   interconnection through a BIER domain.

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
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   and may be updated, replaced, or obsoleted by other documents at any
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   This Internet-Draft will expire on December 30, 2018.

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   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
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   to this document.  Code Components extracted from this document must

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   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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Problem statement . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Solution  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Advertisement . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Encapsulation . . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  Decapsulation . . . . . . . . . . . . . . . . . . . . . .   4
     3.4.  Formats . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Terminology

   This document uses terminologies defined in [RFC8279], [RFC6513],
   [RFC6514], [I-D.ietf-bier-mld].

2.  Problem statement

   BIER (Bit Indexed Explicit Replication) [RFC8279] introduces an
   architecture for the forwarding of multicast data packet.  It
   provides optimal forwarding of multicast packet through a 'multicast
   domain'.  It does not require explicitly building multicast
   distribution trees, nor does require intermediate nodes to maintain
   any per-flow state.

   BIER MVPN [I-D.ietf-bier-mvpn] introduces a method which using BIER
   as multicast tunnels (P-tunnels) to carry multicast traffic across
   the BIER domain.  The advertising method from [RFC6513] and [RFC6514]
   is general and flexible, but it is complicated in some situations at
   the same time because of the program of many parameters, like RD, RT,
   etc.  In many situations which only interconnect different sites
   across a domain, the comprehensive MVPN configuration increases the
   network administrative complication.

   In the other hand, BIER MVPN using upstream assigned label to
   indicate the corresponding multicast flow in a MVPN.  The pair of
   ingress PE and upsteam assigned labels increases label administration
   and flow forwarding complication.
   [I-D.zzhang-bess-mvpn-evpn-aggregation-label] arises a discussion
   about using common label assigned by controller in MVPN.  But in a

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   network without a controller, it is still a problem to achieve the
   multipoint interconnection without MVPN configuration.

   So for the networks that need flow isolation across domain but do not
   need complicated configuration, this document specifies a method to
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