A Framework for E-Tree Service over MPLS Network
draft-ietf-l2vpn-etree-frwk-00

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Document Type Active Internet-Draft (l2vpn WG)
Authors Lucy Yong  , Yuji Kamite  , Wim Henderickx 
Last updated 2012-01-30
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Network Working Group                       Raymond Key (editor), Huawei
Internet Draft                              Simon Delord, Alcatel-Lucent
Category: Informational                       Frederic Jounay, Orange CH
Expires: July 2012                                     Lucy Yong, Huawei
                                                        Lizhong Jin, ZTE
                                         Yuji Kamite, NTT Communications
                                          Wim Henderickx, Alcatel-Lucent

                                                        January 30, 2012

            A Framework for E-Tree Service over MPLS Network
                     draft-ietf-l2vpn-etree-frwk-00

Status of this Memo 
 
   This Internet-Draft is submitted to IETF in full conformance with the 
   provisions of BCP 78 and BCP 79. 
 
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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 July 30, 2012. 

Abstract
    
   This document proposes a solution framework for supporting Metro 
   Ethernet Forum (MEF) Ethernet Tree (E-Tree) services over a 
   Multiprotocol Label Switching (MPLS) network. The objective is to 
   provide a simple and effective approach to emulate E-Tree services 
   in addition to Ethernet LAN (E-LAN) services on an existing MPLS 
   network.

Key, et al.                Expires July 2012                  [Page 1]
Internet Draft         Framework E-Tree over MPLS           January 2012

Table of Contents
   
   1. Introduction....................................................3
   1.1. Objective and Scope...........................................3
   1.2. Traditional Ethernet Network..................................3
   1.3. MEF Multipoint Ethernet Services..............................3
   1.3.1. Similarity between E-LAN and E-Tree.........................4
   1.3.2. Difference between E-LAN and E-Tree.........................4
   1.4. IETF Multipoint L2VPN Services................................5
   1.4.1. Virtual Private LAN Service (VPLS)..........................5
   1.4.2. Virtual Private Multicast Service (VPMS)....................5
   1.5. Terminology...................................................6
   2. Reference Model.................................................6
   3. Use Cases.......................................................8
   4. Challenges......................................................9
   4.1. Generic E-Tree Service Definition.............................9
   4.1.1. Mandatory Leaf-to-Leaf Communication Restriction............9
   4.2. Use Case Desirable Requirements..............................10
   4.2.1. Ethernet Broadcast/Multicast Optimisation..................10
   4.2.2. IP Multicast Optimisation..................................11
   4.2.3. MAC-based Forwarding Unnecessary...........................11
   4.2.4. MAC-based Forwarding Security Concern......................12
   5. A Solution Framework for MAC-based Forwarding E-Tree...........12
   5.1. MAC-based Forwarding Any-to-Any Ethernet VPN.................12
   5.2. Leaf-to-Leaf Communication Restriction.......................13
   5.3. Optional Enhancement - Point-to-Multipoint PW................13
   5.4. Optional Enhancement - IP Multicast in VPLS.......... .......14
   6. Non-MAC-based Forwarding E-Tree................................14
   6.1. Single Root, Broadcast Only - VPMS...........................14
   6.2. Multiple Roots, Broadcast and Unicast........................14
   7. Security Consideration.........................................14
   8. IANA Considerations............................................15
   9. Acknowledgements...............................................15
   10. References....................................................15
   10.1. Normative References........................................15
   10.2. Informative References......................................15
   Appendix A. Some Possible Ways for Leaf-to-Leaf Communication
               Restriction...........................................18
   Authors' Addresses................................................28
   Intellectual Property and Copyright Statements....................29

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