Ericsson EDA 1/1553 HSC 901 86/1 Uen PA1 User Manual To The 5bf336b5 4dc9 4900 8f37 8ae5b88000ea
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Shared DSL User Guide EDA Remote Shared Site EDA Network Management Traffic Broadband Network DSLAM Router/ BRAS Subscriber Traffic Data Network Shared DSL User Guide EDA . Copyright © Ericsson AB 2004, 2006 - All Rights Reserved Disclaimer No part of this document may be reproduced in any form without the written permission of the copyright owner. The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document. ii 1/1553-HSC 901 86/1 Uen A 2006-02-21 . Contents 1 Introduction to this Guide 1 1.1 Revision History 1 2 The Shared DSL Solution 2 2.1 Shared DSL Concept 2 2.2 Services 4 2.3 End-users Layer two Separation 4 3 Router Role 5 4 The Remote Site 6 4.1 Remote Site Elements 6 4.2 Environment 8 4.3 Configuring the CPE Modem 8 Acronyms and Abbreviations 1/1553-HSC 901 86/1 Uen A 2006-02-21 9 iii Contents iv 1/1553-HSC 901 86/1 Uen A 2006-02-21 Introduction to this Guide 1 Introduction to this Guide This guide describes the Shared DSL solution, and explains how to use it. The guide is a combination of a solution description and a user’s guide. It is possible to read the guide without former knowledge of the EDA system. However, it is recommended to read the EDA System Overview in order to completely understand the concept. This guide can be printed on a monochrome printer, though the illustrations are easier understood if a color printer is used. 1.1 Revision History This is the first version, valid for EDA 3.0. This document is based on the previously released Shared DSL User’s Guide 1/1553-HSC 901 26/4 Uen A. 1/1553-HSC 901 86/1 Uen A 2006-02-21 1 The Shared DSL Solution 2 The Shared DSL Solution The Shared DSL solution is a new, cost effective, and secure way of unbundling DSL, when the primary Access Provider is not the owner of the EDA network. The secondary Access Provider (who owns the EDA network) simply extends the EDA network through the primary Access provider network. The Shared DSL solution is targeted towards data services like Internet Access. 2.1 Shared DSL Concept In a situation where another Access Provider owns the line to multi dwellings, leasing a line for each End-user (subscriber) can be expensive. The Shared DSL concept calls for leasing only one line, then creating a remote EDA site. The connected End-users share the DSL line capacity, while maintaining the EDA system security and benefits. For the Secondary Access Provider, managing the remote site is almost the same as managing nodes and End-users in a standard EDA network. Figure 1 on page 2 illustrates the Shared DSL concept Secondary Access Provider Remote Shared Site EDA Network CPE Modem IP DSLAM Primary Access Provider DSLAM ADSL Figure 1 2 Eth ADSL Broadband Network Any Carrier Management Traffic Router/ Subscriber Traffic BRAS Data Network IP Shared DSL Concept 1/1553-HSC 901 86/1 Uen A 2006-02-21 The Shared DSL Solution The concept of the Shared DSL is using one DSL line inside the Primary Access Provider network, terminating the line with a Customer Premises Equipment (CPE) modem that converts the DSL to Ethernet. The Ethernet is then converted again to DSL by the IP DSLAM to make the DSL connection to the End-users (this part belongs to the secondary Access Provider). The concept does not call for any specific equipment in the Primary Access Provider network, except that it is able to separate and isolate the data channels coming from the Shared DSL remote site: Enduser data and Management data. The Concept allows for one type of Quality of Service for both End-users and management traffic. The limiting factor is the capability of the CPE modem in the remote site to prioritize traffic. Both types of traffic are therefore best effort. The End-user traffic is directed towards public data network (Internet) from the Router or BRAS of the Primary Access Provider. The Management traffic is directed toward the EDA network (Access Domain). The Shared DSL solution requires that the used CPE Modem has the capabilities of mapping between Ethernet VLANs and ATM Permanent Virtual Circuits (PVCs). The Shared DSL Solution supports DHCP option82 (please refer to System Description for details about the DHCP relay agent in the EDA). The Shared DSL solution does not support EDA Dynamic Management VLAN concept (DMV).1 1 The DMV is a solution for using a different management VLAN (not 246) in the EDA network, with automatic adaptation of the IP DSLAMs to the management VLAN. 1/1553-HSC 901 86/1 Uen A 2006-02-21 3 The Shared DSL Solution 2.2 Services Up to seven services can be offered to the End-users of each remote site, if the Primary Access Provider’s DSLAM and network supports it (eight PVCs together with the Management channel). However, since there is no Quality of Service differentiation between the different services, they can only be used to enable End-users to use different Service Providers. 2.3 End-users Layer two Separation It is most likely that all End-users of one remote site will be using the same Service, and therefore the same VLAN in the remote site Ethernet. Layer two separation of the End-users is achieved by using PPPoE, or by using the EDA Fast forwarding feature that forwards all End-user traffic to a specific router. 4 1/1553-HSC 901 86/1 Uen A 2006-02-21 Router Role 3 Router Role The Router or BRAS plays an important role in the Shared DSL concept, and must perform the following functions: • DHCP requests from the IP DSLAM in the remote site must be relayed towards the EDA network, using the management VLAN ID. • The Management PVC from the remote site must be mapped to the EDA Management VLAN. • If PPPoE or PPPoA is used for the END-user traffic, it must be terminated by the BRAS. • If the Router (or BRAS) is not an Edge Node of the EDA network as well, a tunnel must be established to the EDN network (for example L2TP or another VPN solution, see Figure 2 on page 5). EDA Network Management VLAN EDA Network Router/ BRAS Broadband Network Management PVC Router/ BRAS Primary Access Provider Figure 2 1/1553-HSC 901 86/1 Uen A 2006-02-21 Tunnel Secondary Access Provider Management VLAN Broadband Network Management PVC Router/ BRAS Primary Access Provider Secondary Access Provider Management Traffic Mapping 5 The Remote Site 4 The Remote Site The Remote site is the extension of the EDA network. The Shared DSL solution does not specify the full extent of the site, only the minimum required functionality and basic elements. 4.1 Remote Site Elements The remote site must contain at least the following elements: • -48 VDC power supply • 230 VAC outlet • CPE modem • EPN102 EDA Power Node • IP DSLAM • Necessary KRONE connectors for the IP DSLAM and EPN102 Depending on the type of installation and IP DSLAM used, an EDA filter might also be necessary. Note: 6 Under usual circumstances, it is not necessary to have a battery backup of the system, since the remote site is supplied with the same power as the rest of the building. 1/1553-HSC 901 86/1 Uen A 2006-02-21 The Remote Site Figure 3 on page 7 illustrates a remote site for 12 End-users, using the EDN312, which has a built-in filter. Ethernet & Power Ethernet ADSL from Central Office ADSL & telephony to End-users CPE Modem EDN312 EPN102 Adaptor -48 VDC Power Supply 230 VAC Mains outlet Subscriber Lines To Central Office Figure 3 1/1553-HSC 901 86/1 Uen A 2006-02-21 Remote Site for 12 End-Users 7 The Remote Site 4.2 Environment It is recommended to take some security measures for the site to prevent tampering with the equipment (for example a locked cabinet). The ambient temperature around the equipment must be within 0 – 45 ºC. The relative humidity must be within 5% - 95%, non condensing. 4.3 Configuring the CPE Modem The CPE Modem must be configured to map the VLANs used by the IP DSLAM to PVCs towards the Central Office (see Figure 4 on page 8). It must be configured to use the PVCs (VPI, VCI) used by the Central Office DSLAM, and the Management and Data VLAN IDs used by the IP DSLAM. Management VLAN VLAN ID VLAN ID VLAN ID VLAN ID Data VLAN Figure 4 Note: 8 VPI / VCI Management PVC Central Office DSLAM VPI / VCI VPI / VCI VPI / VCI Data PVC Configuration of the CPI Modem The Management VLAN ID does not necessarily have to be the same VLAN ID as the ID used in the EDA network (although it is recommended to use it to avoid confusion). 1/1553-HSC 901 86/1 Uen A 2006-02-21 Acronyms and Abbreviations Acronyms and Abbreviations ADSL Asymetric Digital Subscriber Line PPPoE Point to Point Protocol over Ethernet ATM Asynchronous Transfer Mode PVC Permanent Virtual Circuit BRAS Broadband Remote Access Server VCI Virtual Channel Identifier CPE Customer Premises Equipment VPI Virtual Path Identifier DSL Digital Subscriber Line VPN Virtual Private Network L2TP Layer Two (2) Tunneling Protocol PPPoA Point to Point Protocol over ATM 1/1553-HSC 901 86/1 Uen A 2006-02-21 9 Ericsson AB www.ericsson.com © Ericsson AB 2004, 2006 - All Rights Reserved 1/1553-HSC 901 86/1 Uen A 2006-02-21
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