Requirements for MEF E-Tree Support in L2VPN
draft-ietf-l2vpn-etree-reqt-04

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Document Type Active Internet-Draft (l2vpn WG)
Last updated 2013-04-03
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Network Working Group                       Raymond Key (editor), Huawei
Internet Draft                                     Simon Delord, Telstra
Category: Informational                       Frederic Jounay, Orange CH
Expires: October 2013                             Lu Huang, China Mobile
                                               Zhihua Liu, China Telecom
                                           Manuel Paul, Deutsche Telekom
                                        Ruediger Kunze, Deutsche Telekom
                                                 Nick Del Regno, Verizon
                                          Josh Rogers, Time Warner Cable

                                                           April 4, 2013

              Requirements for MEF E-Tree Support in L2VPN
                    draft-ietf-l2vpn-etree-reqt-04

Abstract

   This document provides functional requirements for Metro Ethernet 
   Forum (MEF) Ethernet Tree (E-Tree) support in multipoint L2VPN 
   solutions (referred to as simply L2VPN). It is intended that 
   potential solutions will use these requirements as guidelines. 

Status of this Memo 
 
   This Internet-Draft is submitted to IETF in full conformance with the 
   provisions of BCP 78 and BCP 79. 
 
   Internet-Drafts are working documents of the Internet Engineering 
   Task Force (IETF), its areas, and its working groups.  Note that 
   other groups may also distribute working documents as Internet- 
   Drafts. 
 
   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." 
 
   The list of current Internet-Drafts can be accessed at 
   http://www.ietf.org/ietf/1id-abstracts.txt. 
 
   The list of Internet-Draft Shadow Directories can be accessed at 
   http://www.ietf.org/shadow.html. 
 
   This Internet-Draft will expire on October 4, 2013. 

Key, et al.               Expires October 2013                 [Page 1]
Internet Draft         Requirement E-Tree in L2VPN            April 2013

Table of Contents
   
   1. Introduction....................................................3
   2. IETF Multipoint Ethernet L2VPN Services.........................3
   2.1. VPLS..........................................................3
   2.2. E-VPN.........................................................3
   3. MEF Multipoint Ethernet Services................................3
   3.1. Similarity between E-LAN and E-Tree...........................3
   3.2. Difference between E-LAN and E-Tree...........................4
   3.3. E-Tree Use Cases..............................................4
   3.4. Generic E-Tree Service........................................5
   4. Problem Statement...............................................5
   4.1. Motivation....................................................5
   4.2. Leaf-to-Leaf Communication Restriction........................5
   5. Requirements....................................................6
   5.1. Functional Requirements.......................................6
   5.2. Applicability.................................................6
   5.3. Backward Compatibility........................................7
   5.4. External Network Network Interface............................7
   6. Security Consideration..........................................7
   7. IANA Considerations.............................................7
   8. Acknowledgements................................................7
   9. References......................................................7
   9.1. Normative References..........................................7
   9.2. Informative References........................................8
   Appendix
   A. Frequently Asked Questions......................................9
   A.1. Are E-Tree requirements addressed in the Virtual 
        Private Multicast Service (VPMS) requirements?................9
   A.2. Are there any potential deployment scenarios for 
        a "VPLS Only" solution?......................................10
   Authors' Addresses................................................13
   Intellectual Property and Copyright Statements....................14

Conventions used in this document 
    
   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]. 

Key, et al.               Expires October 2013                 [Page 2]
Internet Draft         Requirement E-Tree in L2VPN            April 2013

1. Introduction 
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