TECHNICAL REPORT TR-101 Migration to Ethernet-Based Broadband Aggregation Issue: 2 Issue Date: July 2011 © The Broadband Forum. All rights reserved. Migration to Ethernet-Based Broadband Aggregation TR-101 Issue 2 Notice The Broadband Forum is a non-profit corporation organized to create guidelines for broadband network system development and deployment. This Broadband Forum Technical Report has been approved by members of the Forum. This Broadband Forum Technical Report is not binding on the Broadband Forum, any of its members, or any developer or service provider. This Broadband Forum Technical Report is subject to change, but only with approval of members of the Forum. This Technical Report is copyrighted by the Broadband Forum, and all rights are reserved. Portions of this Technical Report may be copyrighted by Broadband Forum members. This Broadband Forum Technical Report is provided AS IS, WITH ALL FAULTS. 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All rights reserved. 2 of 101 Migration to Ethernet-Based Broadband Aggregation TR-101 Issue 2 Issue History Issue Issue Date Issue Editor Changes Number 1 April 2006 Amit Cohen, ECI Telecom Original Ed Shrum, BellSouth Telecommunications 2 July 2011 Tom Anschutz, AT&T Additional access technologies, errata, minor enhancements developed in related TRs. July 2011 © The Broadband Forum. All rights reserved. 3 of 101 Migration to Ethernet-Based Broadband Aggregation TR-101 Issue 2 Comments or questions about this Broadband Forum Technical Report should be directed to [email protected]. Editor Tom Anschutz AT&T End to End Architecture David Allan Ericsson WG Chairs David Thorne BT Vice Chair Sven Ooghe Alcatel-Lucent Chief Editor Michael Hanrahan Huawei Technologies July 2011 © The Broadband Forum. All rights reserved. 4 of 101 Migration to Ethernet-Based Broadband Aggregation TR-101 Issue 2 Table of Contents 1. INTRODUCTION AND PURPOSE ................................................................................................. 11 1.1 Document Scope ..................................................................................................................... 11 1.2 ATM Based Architectures ........................................................................................................ 11 1.3 Broadband Network Gateway Assumptions ............................................................................ 13 1.4 Motivation for Migration to Ethernet Based Broadband Aggregation ...................................... 13 1.5 Requirements .......................................................................................................................... 14 1.6 Key Terminology ...................................................................................................................... 14 1.7 Acronyms ................................................................................................................................. 20 2. FUNDAMENTAL ARCHITECTURAL AND TOPOLOGICAL ASPECTS ...................................... 22 2.1 Residential Gateway ................................................................................................................ 23 2.2 The U Interface ........................................................................................................................ 23 2.3 Access Node ............................................................................................................................ 24 2.4 Access Node Deployment Options .......................................................................................... 25 2.5 The V interface ........................................................................................................................ 27 2.5.1 VLAN Architectures .......................................................................................................... 28 2.6 Ethernet Aggregation Network ................................................................................................ 32 2.7 Broadband Network Gateways ................................................................................................ 33 2.8 Multicast Architecture .............................................................................................................. 34 2.9 QoS support ............................................................................................................................. 34 2.10 Business Services Support ...................................................................................................... 36 2.11 Policy Management ................................................................................................................. 36 3. ACCESS NODE REQUIREMENTS ............................................................................................... 37 3.1 VLANs ...................................................................................................................................... 37 3.1.1 VLAN ID and Priority Assignment Capabilities ................................................................. 37 3.1.2 VLAN Allocation Paradigms ............................................................................................. 41 3.2 Access Node Forwarding Mechanisms ................................................................................... 41 3.2.1 General ............................................................................................................................. 41 3.2.2 Forwarding in N:1 VLANs ................................................................................................. 41 3.2.3 Forwarding in 1:1 VLANs ................................................................................................. 42 3.3 QoS .......................................................................................................................................... 42 3.3.1 Traffic Classification and Class of Service Based Forwarding ......................................... 43 3.4 Multicast Support ..................................................................................................................... 44 3.5 Protocol Adaptation Functions ................................................................................................. 44 3.5.1 PPPoE over ATM (U-interface) ........................................................................................ 44 3.5.2 IPoE over ATM (U-interface) ............................................................................................ 45 3.5.3 IP over ATM (U-interface) ............................................................................................... 46 3.5.4 PPP over ATM (U-interface) ............................................................................................. 47 3.6 Multi-session Support .............................................................................................................. 51 3.7 L2 Security Considerations ...................................................................................................... 51 3.7.1 Broadcast Handling .......................................................................................................... 51 3.7.2 MAC Address Spoofing .................................................................................................... 51 3.7.3 MAC Address Flooding .................................................................................................... 52 3.7.4 Filtering ............................................................................................................................. 52 3.8 Additional IWF for IPoE based Access in N:1 VLANs ............................................................