Requirements for Multicast Support in Virtual Private LAN Services
RFC 5501

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Network Working Group                                     Y. Kamite, Ed.
Request for Comments: 5501                            NTT Communications
Category: Informational                                          Y. Wada
                                                                     NTT
                                                              Y. Serbest
                                                                    AT&T
                                                                T. Morin
                                                          France Telecom
                                                                 L. Fang
                                                     Cisco Systems, Inc.
                                                              March 2009

   Requirements for Multicast Support in Virtual Private LAN Services

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (c) 2009 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 in effect on the date of
   publication of this document (http://trustee.ietf.org/license-info).
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.

Abstract

   This document provides functional requirements for network solutions
   that support multicast over Virtual Private LAN Service (VPLS).  It
   specifies requirements both from the end user and service provider
   standpoints.  It is intended that potential solutions will use these
   requirements as guidelines.

Kamite, et al.               Informational                      [Page 1]
RFC 5501              Multicast VPLS Requirements             March 2009

Table of Contents

   1. Introduction ....................................................3
      1.1. Background .................................................3
      1.2. Scope of This Document .....................................4
   2. Conventions Used in This Document ...............................5
      2.1. Terminology ................................................5
      2.2. Conventions ................................................6
   3. Problem Statements ..............................................6
      3.1. Motivation .................................................6
      3.2. Multicast Scalability ......................................7
      3.3. Application Considerations .................................8
           3.3.1. Two Perspectives of the Service .....................8
   4. General Requirements ............................................9
      4.1. Scope of Transport .........................................9
           4.1.1. Traffic Types .......................................9
                  4.1.1.1. Multicast and Broadcast ....................9
                  4.1.1.2. Unknown Destination Unicast ................9
           4.1.2. Multicast Packet Types ..............................9
           4.1.3. MAC Learning Consideration .........................11
      4.2. Static Solutions ..........................................11
      4.3. Backward Compatibility ....................................11
   5. Customer Requirements ..........................................12
      5.1. CE-PE Protocol ............................................12
           5.1.1. Layer-2 Aspect .....................................12
           5.1.2. Layer-3 Aspect .....................................12
      5.2. Multicast Domain ..........................................13
      5.3. Quality of Service (QoS) ..................................14
      5.4. SLA Parameters Measurement ................................14
      5.5. Security ..................................................15
           5.5.1. Isolation from Unicast .............................15
           5.5.2. Access Control .....................................15
           5.5.3. Policing and Shaping on Multicast ..................15
      5.6. Access Connectivity .......................................15
      5.7. Multi-Homing ..............................................15
      5.8. Protection and Restoration ................................15
      5.9. Minimum MTU ...............................................16
      5.10. Frame Reordering Prevention ..............................16
      5.11. Fate-Sharing between Unicast and Multicast ...............16
   6. Service Provider Network Requirements ..........................18
      6.1. Scalability ...............................................18
           6.1.1. Trade-Off of Optimality and State Resource .........18
           6.1.2. Key Metrics for Scalability ........................19