Tài liệu Ethernet Native LAN Extensions Solutions for the Enterprise docx

WHITE PAPER Ethernet Native LAN Extensions Solutions for the Enterprise Ethernet Native LAN Extensions Solutions for the Enterprise Overview In today’s fast paced economic climate, enterprise companies are continually pressured to do more with less, yet they are expanding their reach nationally and globally at a record pace. The corporate network is being stretched like never before. New applications such as video conferencing and monitoring, file sharing, and Voice over IP (VoIP) demand more bandwidth. Regulatory requirements are putting pressure on IT resources for compliance, and remote locations need to receive the same application support and resources as the corporate network – all without increasing cost. The network has become a critical tool and most corporate IT departments are looking to Ethernet as a solution to help meet the growing list of demands. Ethernet Native LAN extensions allow corporations to remove capital and operational costs from their existing network infrastructure. New technologies that deliver higher bandwidth at a lower cost per megabit are now available and becoming widely deployed. This paper will discuss how Enterprise companies can use Ethernet Native LAN extension platforms to cost effectively deliver multiple applications and more bandwidth to all locations, regardless of where they are located. Ethernet Native LAN Extensions - Solutions for the Enterprise Page 3 Native LAN Extension Native LAN Extension gives enterprise companies the ability to connect their LANs together in such a way that the network is transparent to physical boundaries. All of the LANs appear as if they were connected on the same network regardless of location. Additionally, Native LAN Extension allows enterprise IT managers to leverage the speed and simplicity of Ethernet to save both capital costs and operational costs in the network. With Native LAN Extensions, enterprise companies do not have to learn or manage complex technologies such as SONET/SDH, frame relay or ATM. They only work with Ethernet, a familiar LAN technology, and leverage a provider’s expertise and resources in wide area technologies. Native LAN Extension can be deployed in three types of configurations: • Point-to-Point • Point-to-Multipoint • Multipoint-to-Multipoint Point-to-Point The Metro Ethernet Forum (MEF) defines a point-to-point connection as an E-Line Ethernet service type that is based on a point-to-point Ethernet Virtual Connection (EVC). An E-Line service delivers Ethernet-based LAN services across a local or metro serving area from one point to another. Point-to-Multipoint A point-to-multipoint connection delivers Ethernet-based services across a national or international serving area in a hub-and-spoke topology. In this topology, a router or switch at the main enterprise hub node would have to supply the connectivity between the nodes on the end of the spokes. Multipoint-to-Multipoint A multipoint-to-multipoint topology uses VLAN tags to deliver differentiated Ethernet services from a single or multiple customers over a Native LAN. The MEF defines this topology as an E-LAN service, and it is also known as a star topology. A star network supplies multipoint-to-multipoint connectivity between all customer nodes. Ethernet Native LAN Extensions - Solutions for the Enterprise Page 4 Ethernet over T1/E1 T1/E1 lines and frame relay connections are still the primary mode of transport for enterprise companies of all sizes to reach many of their office locations. But despite its ubiquity in the last mile, frame relay cannot offer the bandwidth, flexibility, or scalability that Ethernet can. Products are available today that can help enterprise companies leverage their existing T1/E1 infrastructure to deliver business class Ethernet-based services over these lines in place of frame relay. Up to 8 T1s can be bonded using the standard Multilink Point-to-Point Protocol (MLPPP) offering up to 12Mb/s (T1) or 16 Mb/s (E1) of service. Customer benefi ts include: • Bonded T1/E1 links provide bandwidth ranging from 1.5 Mb/s to 16 Mb/s and automatic removal/restoration of failed links. • Use of existing T1/E1 lines to deliver Ethernet services to all locations. • Plug and play platform and design. • Easy access to configure or disable access and ports from anywhere via secure in-band management access from anywhere on the network. Core Bonded T1/E1s T1/E1 Ethernet VoIP PBX Switch/Router Switch/Router Example of Ethernet over T1/E1 Ethernet Native LAN Extensions - Solutions for the Enterprise Page 5 Ethernet over DS3 Most enterprise WAN networks today use DS1 or DS3 connections. Most services in place today that use DS3 circuits require an all or none approach – either the entire 45 megabits is used or none is. By adding Ethernet services to a DS3, bandwidth can now be groomed to any increment from sub 10megabits up to 45 megabits, allowing a “pay as you grow” approach to service. Customer benefi ts include: • Use of existing DS3 connections to deliver Ethernet services to all locations. • Plug and play platform and design. • Enhanced user traffic classification for better management. • Easy access to configure or disable access and ports from anywhere via secure in-band management access from anywhere on the network. • Delivery of circuit based TDM services via circuit emulation in addition to Ethernet from the same platform. Switch/ Router Switch/ Router Switch/ Router Ethernet Ethernet Ethernet VoIP PBX Traditional PBX Ethernet T1 GigE Regional Office or HQ Remote Sites T1s PBX PSTN IP/MPLS DS3 DS3 DS3 Transport Network Site 1 Site 2 Site 3 Example of Ethernet over DS3 Ethernet Native LAN Extensions - Solutions for the Enterprise Page 6 Ethernet over SONET/SDH Enterprise companies have always wanted to extend the benefits of Ethernet beyond the borders of their Local Area Networks (LANS) to go over Metropolitan Area Networks (MANs) and Wide Area Networks (WANs) to connect remote offices. SONET/SDH has been a mainstay in carrier networks for years because of its reliability, consistency of service, and fault recovery strengths. As enterprises continue to push Ethernet across multiple locations in a city or region, the industry has responded by developing new ways of transporting Ethernet across different topologies. Transporting Ethernet over SONET/SDH gives enterprise companies a “best of both worlds” solution. Converged packet access solutions give enterprise companies a way to bridge the TDM and packet worlds to deliver flexible, business class Ethernet services over existing SONET/SDH networks. Ethernet over SONET/SDH can also be deployed on private campus network facilities as well. Customer benefi ts include: • Leveraging existing SONET/SDH networks to deliver new Ethernet services, while lowering the costs to provide these services. • Delivery of circuit based TDM services via circuit emulation in addition to Ethernet from the same platform. • Meet current user requirements for Ethernet services, while positioning the network for future evolution to an IP/ MPLS core. Remote Office Large Office Ethernet Remote Fiber Attached Office Ethernet Ethernet Metro SONET/SDH Network HQ LEC ADM ADM PSTN IP/MPLS Core PBX ADM OC3/12 OC3/12 Example of Ethernet over SONET/SDH Ethernet Native LAN Extensions - Solutions for the Enterprise Page 7 MultiService Ethernet Many enterprise networks today require a separate physical circuit for each voice and data network offering. This scenario allows for the enterprise company to provide access to most of its locations. Traffic can be kept totally separate or can be bridged across all locations to form a single LAN. Additionally, the headquarters location can aggregate multiple discrete circuits or larger channelized links (such as channelized DS3), if need be. Converged packet access solutions give enterprise companies a way to deliver multiservice Ethernet to all locations, regardless of where they are located, all over the same platform. Customer benefi ts include: • Leveraging the combined benefits of both LAN Extension and T1 circuit emulation applications. • Adding new corporate locations economically using a leased access circuit. • Minimizing network costs by delivering the appropriate amount of bandwidth at each location. • Lowering toll charges by transporting traditional voice services and data over the same network. T1/E1 T1/E1 Ethernet T1/E1 T1/E1 Ethernet ch. DS3 (MLPPP) DS3 OC-3/STM-1 OC-12/STM-4 NxT1/E1 DS3/NxDS3 OC-3/STM-1 OC-12/STM-4 Service provider or private network Ethernet Ethernet Example of MultiService Ethernet Resilient Ethernet Instead of having voice, video and data delivered over separate parallel networks, many enterprise customers seek to deliver multiple services over a single Ethernet based network. In order for voice calls to be delivered seamlessly over a packet-based network, there must be a sub-50 millisecond resiliency in place to ensure voice calls can be carried seamlessly across the network. Layer 2/3 switches generally take much longer to switchover in the event of a failure but protected switching ring solutions now exist and can be deployed that give enterprise companies a solution for sub-50 millisecond resiliency. Storage Network & WAN Back-up The explosion of data generated and used by businesses has made storage a critical priority for enterprises of all sizes. In addition, numerous pieces of legislation have required the remote archiving and protection of data. This huge increase in storage and storage extension has made network uptime a critical function. Ethernet Native LAN extensions can facilitate the implementation of a cost effective resilient network designed to support the transport of large amounts of information. Summary Ethernet Native LAN Extension solutions provide cost effective, ubiquitous solutions to enterprise companies for their converged packet applications for voice, video and data. Flexible bandwidth and existing facilities ranging including Nx T1/E1, DS3, OC3/STM1, OC12/STM3 and GigE can be used to provide an integrated, cost effective solution optimized for each location within the enterprise company. These Native LAN Extensions can also be provided over Carrier provided leased facilities or private enterprise networks. Web Site: www.adc.com From North America, Call Toll Free: 1-800-366-3891 • Outside of North America: +1-952-938-8080 Fax: +1-952-917-3237 • For a listing of ADC’s global sales office locations, please refer to our web site. ADC Telecommunications, Inc., P.O. Box 1101, Minneapolis, Minnesota USA 55440-1101 Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, ADC reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our headquarters office in Minneapolis. ADC Telecommunications, Inc. views its patent portfolio as an important corporate asset and vigorously enforces its patents. Products orfeatures contained herein may be covered by one or more U.S. or foreign patents. An Equal Opportunity Employer 103517AE 9/06 Original © 2006 ADC Telecommunications, Inc. All Rights Reserved WHITE PAPER GigE with sub - 50 msec PSR 10/100/100 T1/E1, NxT1/E1, DS3, OC-3/STM-1, OC-12/STM-4 Example of Resilient Ethernet . WHITE PAPER Ethernet Native LAN Extensions Solutions for the Enterprise Ethernet Native LAN Extensions Solutions for the Enterprise Overview In. of where they are located. Ethernet Native LAN Extensions - Solutions for the Enterprise Page 3 Native LAN Extension Native LAN Extension gives enterprise