Requirements for MEF E-Tree Support in VPLS
draft-ietf-l2vpn-etree-reqt-01

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Document Type Active Internet-Draft (l2vpn WG)
Last updated 2012-04-13
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Network Working Group                       Raymond Key (editor), Huawei
Internet Draft                              Simon Delord, Alcatel-Lucent
Category: Informational                       Frederic Jounay, Orange CH
Expires: October 2012                             Lu Huang, China Mobile
                                               Zhihua Liu, China Telecom
                                           Manuel Paul, Deutsche Telekom
                                        Ruediger Kunze, Deutsche Telekom
                                                 Nick Del Regno, Verizon
                                        Joshua Rogers, Time Warner Cable

                                                          April 13, 2012

              Requirements for MEF E-Tree Support in VPLS
                    draft-ietf-l2vpn-etree-reqt-01

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 
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   The list of Internet-Draft Shadow Directories can be accessed at 
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   This Internet-Draft will expire on October 13, 2012. 

Abstract

   This document provides functional requirements for Metro Ethernet 
   Forum (MEF) Ethernet Tree (E-Tree) support in Virtual Private LAN 
   Service (VPLS). It is intended that potential solutions will use 
   these requirements as guidelines. 

Key, et al.               Expires October 2012                 [Page 1]
Internet Draft         Requirement E-Tree in VPLS             April 2012

Table of Contents
   
   1. Introduction....................................................3
   2. Virtual Private LAN Service.....................................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...........................3
   3.3. E-Tree Use Cases..............................................4
   3.4. Generic E-Tree Service........................................4
   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......................................................8
   9.1. Normative References..........................................8
   9.2. Informative References........................................8
   Appendix
   A. Frequently Asked Questions......................................9
   A.1. Are E-Tree requirements addressed in the 
        VPMS requirement draft?.......................................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 2012                 [Page 2]
Internet Draft         Requirement E-Tree in VPLS             April 2012

1. Introduction 

   This document provides functional requirements for Metro Ethernet 
   Forum (MEF) Ethernet Tree (E-Tree) support in Virtual Private LAN 
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