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What enterprise executives need to know about Optical ...


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What enterprise executives need to know about Optical ...

  1. 1. White Paper What enterprise executives need to know about Optical Ethernet network services
  2. 2. Contents eBusiness and its challenge for the enterprise executive . . . . . . . 3 Time to service—How eBusiness success is measured . . . . . . 3 Contending with the bandwidth bottleneck . . . . . . . . . . . . 3 Staffing—A critical shortage . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Rethinking the client/server and networking models . . . . . . 4 What drives IT spending patterns? . . . . . . . . . . . . . . 4 How have the enterprise computing and networking models changed? . . . . . . . . . . . . . . . . . . . 4 A new standard is needed . . . . . . . . . . . . . . . . . . . . . . 4 What is Optical Ethernet? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Simplified networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Scalability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Quality of Service (QoS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Flexible portfolio of services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Optical LAN services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Internet access services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Wide area connectivity services . . . . . . . . . . . . . . . . . . . . . . . 9 Multiservice transport services . . . . . . . . . . . . . . . . . . . . . . . 10 Outsourced network services . . . . . . . . . . . . . . . . . . . . . . . . 10 Is Optical Ethernet right for your business? . . . . . . . . . . . . . . . . . . 10 Online Comments and Suggestions Click anywhere in this box to visit our online ‘Reader Response’ form to comment on this document. Find Out about Our Other Products Click anywhere in this box to get on the mailing list for brochures, planning guides & other information.
  3. 3. eBusiness and its challenge LAN MAN Internet Backbone for the enterprise executive iS iS DS1 Successful eBusiness implementation is iS Core Network one of the primary challenges facing enterprise executives today—how to staff iS iS it, how to distribute it, how to deliver it, and how to maintain it. eBusiness Gigabit Megabit Terabit includes conducting eCommerce and servicing customers over the Internet as To realize the promise and rewards of eBusiness, enterprise managers well as interacting with suppliers. These require a radical new approach to traversing the Metropolitan Area uses of the network are critical to oper- Network (MAN) and addressing its current bottleneck. ating the business. Innovative technology solutions, like being first to market equates to competi- user can consume that amount of capacity. Optical Ethernet, are emerging to address tive advantage and ultimately results in Optical technology can now provide these challenges giving enterprise a leadership position for an enterprise. 10 gigabits on a single lambda and executives the means to excel in the 160 lambdas over a single fiber for long Since eBusinesses are always “open,” the eBusiness age. distance and core networking services. capability to add, delete, and change With the boom of new applications, all Significant advances in technology usually services quickly and seamlessly is an of this bandwidth can be put to good drive changes to existing computing ongoing challenge. Today’s best-effort use by today’s enterprises. However, in models. This paper assesses the capabil- Layer 3 networks are failing to meet all order to enable the new eBusiness services ities of the current enterprise-computing of the demands for real-time applications, that run on high-speed, high-bandwidth model in meeting today’s eBusiness such as IP telephony, desktop and web networks, enterprises need to intercon- requirements. The paper also provides an collaboration, and video conferencing. nect their gigabit LAN backbones to introduction to new high-performance Compounding the situation is the lead- each other as well as with the Internet. services, delivered through Optical time that service providers need to Ethernet, which will help enterprise exec- fulfill requests for additional network While growth has driven the LAN to utives to realize their eBusiness vision. services or changes in service to expe- gigabit Ethernet speeds and to fiber optics dite delivery of these applications. in the Wide Area Network (WAN), access speeds in the Metropolitan Area Time to service—How eBusiness With Optical Ethernet networking, Network (MAN) are still mostly in the success is measured critical services can be rapidly deployed megabit range. MANs, originally built How well an enterprise adapts to change in response to an enterprise’s needs. for voice-centric traffic, are not robust and how quickly enterprise executives enough to meet the gigabit requirements can deploy the latest services and applica- Contending with the of today’s enterprises in a data-centric tions for their customers are new criteria bandwidth bottleneck world. Under the current MAN infra- against which businesses are now being structure (which is SONET-, ATM-, Bandwidth in the Local Area Network measured. In many industries, time-to- and frame relay-based), implementing (LAN) has exploded. Five years ago, fifty service is a strategic weapon where next-generation services can be difficult. users shared 10 megabits. Today, a single 3
  4. 4. Even as the residential community is Rethinking the client/server prise’s requirements for communications improving performance (Ethernet via and networking models services grow, the entire computing ADSL or cable modem), the enterprise With the advent of a multitude of data- and networking environment becomes customer is often still restricted to intensive applications associated with more complex, more expensive, and traditional interfaces, such as DS0 and the Internet, including eCommerce, harder to operate and maintain. DS1. To realize the rewards of eBusiness, Customer Relationship Management enterprise managers need a radical new (CRM), third-party interfaces with How have the enterprise computing approach to traversing the MAN and supply chain partners, and Network and networking models changed? addressing its current bottleneck. Attached Storage (NAS), the current Yesterday’s network design paradigm, client/server computing model and its the “80/20 rule,” no longer applies. In Staffing—A critical shortage supporting communications networks the past, 80 percent of the network are becoming overloaded, increasingly traffic stayed within the LAN, and only With the push for more and more complex, and expensive to implement 20 percent flowed beyond the enterprise. processing, the demand for skilled and operate. Enterprise executives may Enterprise traffic consisted mostly of computing resources is likely to continue need to rethink their approach and look electronic mail and shared applications. to outpace their availability. The size for a long-term solution that maximizes Servers were usually local, and any and complexity of enterprise computing return on investment and that satisfies traffic that left a site went to a legacy environments, plus the networks that strategic business requirements. Consider computer for database and processing power them, drive an almost insatiable the following: applications. demand for Information Technology (IT) talent. In the past year, there were With the growth of eBusiness, multi- over 800,000 IT jobs that remained What drives IT spending patterns? media applications, video streaming, unfilled, and that number will continue The client/server model evolved because and real-time video conferencing, the to climb as enterprise networks grow networking between branches and traffic patterns are changing. More and and become more complex. corporate offices was slow and expensive. more traffic is leaving the local enterprise As a result, enterprise executives need Today, applications and data continue network and is traversing the MAN to do more with the resources that they to be distributed to the user. Enterprise and beyond to reach its destination. In currently have while leveraging the latest computing systems push data to users’ fact, the old 80/20 paradigm is on the technological advances that will help to desktops via local and regionalized servers way to reversing itself completely so that drive their businesses forward. Many that are located all over the network. 20 percent of the traffic is site-centric, managers are also under intense pressure These servers must be configured, oper- while the remaining 80 percent leaves the to hold the line on IT spending while ated, and maintained at each location by originating enterprise site and traverses facing an unprecedented growth in skilled technicians. In addition, IT external networks. user computing and communications departments need to support existing, requirements. legacy computers and applications, including SAP, inventory management, A new standard is needed Optical Ethernet can provide solutions and databases of all sorts, in potentially Instead of bringing the data to the that help executives manage the staffing thousands of locations—all of which users by deploying even more servers challenge while providing significantly must be interconnected. As an Enter- across the network and requiring more more capability to the enterprise network. 4
  5. 5. connections with costly services and Optical Ethernet enables service providers to offer enterprise customers personnel to support them, enterprises these leading-edge solutions that break through the bandwidth bottleneck can leverage their networks to bring the to achieve successful implementation of eBusiness solutions. users closer to the data, which is central- ized in one or more locations. To Why it is important to accomplish this, more bandwidth and Name of service Description enterprise executives higher speeds will be demanded from the network to support the text, graphics, Optical LAN Connectionless LAN extension Maximizes resources by and streaming video that users want and services across the MAN and WAN extending the LAN across need. By combining Ethernet with fiber to other sites with traffic the MAN/WAN prioritization optics, this new model can be achieved. Internet access Internet, Intranet, and Extranet High-speed, connectionless services access access to the Internet; seamless What is Optical Ethernet? communication Optical Ethernet combines the power of Ethernet and Optical technologies to Wide area Extends the LAN across the Enables seamless, end-to-end extend corporate business applications connectivity metro and long-haul networks connectivity services across the metropolitan, the regional, and the wide area networks providing Multiservice Provides voice, video, and/or Inherently reliable and efficient; high-bandwidth, high-reliability, and transport services data over the same line provides a single point of access high-performance. for all traffic and allows for traffic prioritization Ethernet is the logical choice to begin the transformation of the MAN from a Outsourced Includes services, such as: Value-added services that enable bottleneck to a strategic component of network services • Optical routing for Intranet an enterprise to consolidate and Internet operations, simplify management, the eBusiness success formula because and free resources to concentrate Ethernet: • NAT/Address management on core competencies • Security management • Has connected corporate networks • Enabled outsourced applica- within buildings for over 25 years tions, such as storage networking services and • Is already present in over 90 percent disaster protection of businesses today • Is a well-known, mature technology • Can scale from megabits to gigabits per second • Is already resident on most computers sold today 5
  6. 6. Ethernet uses a well-understood stan- Internet dards-based technology, Virtual Local Area Network (VLANs), to implement Phase 1 high-performance services. Ethernet is connectionless, protocol independent and, as a Layer 2 technology, it eliminates the need for the complex service configu- ration and conversion associated with Internet running Layer 3 over multiple connec- tion-oriented Layer 2 services. Phase 2 Optical Ethernet Optical technology, which is already Ring successfully deployed in Internet back- bone networks, offers these additional Internet benefits to the Ethernet networks that enterprise managers already know and use: Phase 3 • Simplified networking Optical Ethernet Ring • Scalability • Quality of Service (QoS) • Security In this example, Optical Ethernet technology enables enterprise managers • Reliability to move routers to the edge of the network where they add the most value. Simplified networking via an optical ring or point-to-point Who owns the enterprise router and Because it operates at Layer 2 instead connection to the central site where the where it is located depends on the enter- of Layer 3, an Ethernet-based network routing then takes place. prise’s business strategy. For example, is, by its nature, simpler to operate, faster the equipment and the central site can Using a centralized router simplifies the to implement, and easier to maintain. be owned and operated by an enterprise’s enterprise network and can result in telecommunications service provider. Optical Ethernet technology enables significant cost savings as individual site The enterprise can outsource Layer 3 enterprise managers to move routers to routers are eliminated, as well as the routing, including any traffic that trav- the edge of the network where they add complexity and cost of operating and erses the Metropolitan Area Network the most value. Instead of requiring a managing them. Only LAN-to-LAN (MAN) to a service provider. This router at every site connected to the connections and Internet traffic are allows enterprises to realize savings in network, one central site houses a single passed through enterprise routers. All staffing, hardware, floor space, technical enterprise router, and all Ethernet traffic local traffic stays within the less training, and other IT budget items. that accesses this enterprise router travels complex Layer 2 network. 6
  7. 7. Scalability An Optical Ethernet network can provide unprecedented scalability for metropol- Burst Space itan area networks by enabling enterprises to choose bandwidth increments from one megabyte to ten gigabits, depending on their needs. Some service providers offer services that allow enterprises to provision additional bandwidth-on- demand to accommodate uneven or Customer 1 Service bursty traffic flows. Consuming band- Provider 1 width on a “just in time” basis can eliminate an enterprise’s need for fixed- cost leased lines, which offer only a Service fraction of the bandwidth available Customer 5 Provider 2 Customer with Optical Ethernet usually at 2 substantially higher cost. Quality of Service (QoS) With Optical Ethernet, enterprises buy only the bandwidth they need. Unlike traditional Ethernet, Optical Ethernet is not a best-effort-based tech- nology. When implemented as a Virtual determine the traffic prioritization. walls, Network Address Translation Private Network (VPN), Optical Ethernet Optical Ethernet supports marking of (NAT), and encryption to protect their provides the means to handle the all traffic at the network edge using the data without any changes. intersite eCommerce traffic required by 802.1p standard. today’s enterprises. Such a VPN can Reliability provide guarantees for mission-critical Security Optical Ethernet is inherently more applications, including sales order and inventory management, and enable the Site-to-site access is inherently more reliable since it combines the strength enterprise to realize sales revenue in a secure using fiber optics technology and simplicity of Ethernet with the timely manner. because, by default, photonic technology robustness, the resiliency, and the “five is more difficult to compromise or pene- nines” (99.999) reliability that is proven For example, the enterprise manager can trate than are packets flowing through with optical networks. Carrier-grade, control the flow of traffic simply and a traditional, leased line. self-healing equipment adds to the globally by using a fixed service to map inherent reliability of the fiber optics all of the enterprise traffic by the type of Because the Optical Ethernet services can technology so a service provider can service. A classification filter would then extend beyond the corporation, enter- accommodate “always open” eBusiness read the tagged Ethernet frame to prises can continue to use their existing applications for an enterprise. security mechanisms, including fire- 7
  8. 8. Flexible portfolio of services Adopting Optical Ethernet networks will Co enable enterprise managers to choose re from a variety of specialized services that can be rapidly deployed, easily provi- sioned, and remotely maintained by a service provider or by the enterprise itself. Op D tic om al ain For enterprise managers, the possibili- Eth ties are exciting, and the risks are mini- er ne mized. They will be able to implement t or contract for competitively priced, high-speed, high-value services, such as: • Optical LAN services OE LAN • Internet access services Remote Sites • Wide area connectivity services • Multiservice transport services To the enterprise user, an Optical LAN appears as a robust, trustworthy • Outsourced network services Ethernet segment. Optical LAN services Optical LAN service (OLS), the foun- • Cost-effective network simplification OLS allows service providers to share dation of Optical Ethernet applications, resources and provision fiber among • Power, reach, and reliability of optics extends the LAN across the metropolitan, multiple customers to leverage their cost regional, and wide area networks by Optical LAN services include the connec- structure and offer competitive service using secure Virtual Local Area Network tivity that service providers currently pricing. For enterprise managers, this (VLAN) technology. Analogous to a offer to enterprise customers but with means an easy, cost-effective way to Transparent LAN or VPN service, OLS significantly more bandwidth, higher securely link enterprise sites across is simple to implement and delivers speeds, and faster deployment for a the globe. immediate value, including: time-to-service advantage. • Increased bandwidth without changes After the Optical LAN services are in to the existing enterprise network place, enterprises can add other Optical topology Ethernet services to enhance the effec- tiveness of their IT infrastructures and • Robust and scalable transport to facilitate the implementation and infrastructure delivery of their eBusiness products and services. 8
  9. 9. Internet access services For many eBusiness-oriented companies, Client Site B the Internet has become pervasive throughout the firm. These companies Client Site A aggressively link their customers, Ethernet Access suppliers, business partners, and remote Customer Sites employees through the: • Internet by maintaining web sites for sales and customer service To Internet • Extranets that connect suppliers and Firewall business partners for improved inven- Client Site C Supplier Remote tory and supply chain management Extranet Access Central Office/ISP PoP/Carrier Sites Sites • Intranets and enterprise data portals Hotel/Internet Data Center that provide remote and mobile employees access to the corporate network Optical Ethernet allows LAN frames to find their way across the WAN in While all of this access is possible with the same connectionless manner that they find their way across a LAN. today’s mix of LAN, MAN, and WAN The result is that there is no distinction between the LAN, MAN, and WAN networking technologies and services, it networks with Optical Ethernet. is often slow. This has a negative impact on productivity and can cause customer, employee, and supplier dissatisfaction. Wide area connectivity services tion exists between the LAN, MAN, With Optical Ethernet, however, access The Optical LAN segment, which does and WAN networks with an Optical will be augmented by higher speed and not have physical distance limitations, Ethernet network. much greater bandwidth. If, for example, can span sites that are miles apart and The benefits are many. A service provider your current connection is a T3 line, is designed to deliver high-bandwidth simply provides fiber connectivity, and with Optical Ethernet, you can have a support for data, voice, and video appli- an enterprise or service provider installs 10 gigabit Ethernet pipe that delivers 60 cations throughout the enterprise and and configures the Ethernet equipment. times more bandwidth to service appli- across the WAN. Using Ethernet MAC There is no requirement for a skilled cations and transactions. Optical Ethernet addresses, flooding, and learning technician to map or provision traffic service literally opens the bottleneck capabilities, Optical Ethernet allows across the WAN to individual egress for network traffic running between LAN frames to find their way across sites, as is done today with leased lines enterprises, the MAN, and Internet the WAN in the same connectionless or other virtual circuit services, such as Service Providers (ISPs), resulting in manner that they find their way across frame relay, ATM, and path-based serv- powerful performance gains. a LAN. The result is that no distinc- ices, including IP and MPLS. 9
  10. 10. Multiservice transport services some of the services that Optical Ethernet isolation and maintenance for appli- In addition to offering a broadband, has enabled. cations, workstations, and the LAN high-speed, data service, enterprise itself. The emerging area of remote Some of the specialized, value-added managers can also consolidate legacy data management, through Storage services that enterprise managers may seek voice, data circuits, and private line Area Networks (SANs) and Internet from service provider partners include: services all on the same network infra- Data Centers (IDCs), is another structure through an enterprise-owned • Optical Routing for Intranet and task that enterprise managers might or service-provider network. Internet Services—Enables the enter- outsource. prise manager to outsource gateway By consolidating the voice and data services to a service provider. The networks onto one infrastructure, enter- enterprise manager is responsible for Is Optical Ethernet right prises save the cost of owning and oper- the network up to the gateway port, for your business? ating separate networks. Consolidation while the service provider manages At Nortel Networks, we believe that the can drive savings in capital equipment, the more complex gateway, itself. growth in demand for bandwidth is just facilities costs, headcount and overhead, The enterprise router can be either beginning, and that Ethernet will soon support personnel, and training. located at the enterprise site or, to be become the global protocol of choice for Enterprises can also look to service more efficient, centralized and shared enterprise and service provider networks. providers to deliver the low latency and at the service provider’s location. The emergence of Optical Ethernet repre- low jitter demanded by bandwidth- • Network Address Translation (NAT)/ sents the type of revolutionary innovation intensive applications, such as Voice Address Management Services— that is transforming the technology over IP (VoIP), video on demand, and Removes the headaches associated landscape and driving enterprise execu- High-Definition Television (HDTV). with network address translation and tives to leverage their eBusiness applica- re-translation by allowing a service tions, to focus on their core business, Outsourced network services provider partner to consolidate and and to improve their bottom line results. manage these services. Today, with pressure to maintain and Optical Ethernet solutions will initially operate increasingly complex networks, • Security Services—Relieves the enter- appeal to executives with specific needs many companies are moving towards prise of the daunting task of managing that are strategic to meeting their busi- consolidating network operations in order security regardless of the number of ness goals. Firms with an immediate need to concentrate on their core competen- additions, moves, and changes in the to lower an expanding IT budget, those cies, to minimize risk to their bottom network; may include VLAN config- with requirements for bandwidth of OC3 line, and to combat IT staffing shortages. uration, firewalling, and encryption. or greater, and companies interested in • Enabled Outsourced Applications outsourcing to a technology provider in Since Optical Ethernet is based on Services—Allows an enterprise order to focus on their core business are familiar Ethernet technology, many manager to consolidate operations by all strong candidates for Optical Ethernet enterprise managers feel confident in contracting with a service provider to services. Optical Ethernet services can outsourcing the maintenance of this manage some or all of the IT func- be obtained through a service provider stable and familiar part of the network to tions, such as asset management, or an Optical Ethernet network can be a service provider, as well as adding performance monitoring, and fault implemented by an enterprise. 10
  11. 11. In the United States: In Canada: In Europe: In Asia: In Australia: Nortel Networks Nortel Networks Limited Nortel Networks Nortel Networks Nortel Networks 4006 Hwy. 54 8200 Dixie Road Maidenhead Office Pk. Singapore Pre Ltd Australia Pty Ltd P.O. Box 13010 Suite 100 Westacott Way 151 Lorong Chuan 380 St. Kilda Rd. RTP, NC 27709 Brampton, Ontario Maidenhead Berkshire #02-01 5th/6th Fl. L6T 5P6 SL6 3QH New Tech Park Melbourne, Victoria Tel: +44 1628 432 000 Singapore, 556741 3004 Fax: +44 1628 437 666 Tel: 65 287-2877 Tel: 613 9206 4646 Published by: For more information, contact your Nortel Networks representative. Call 1-800-4 NORTEL (1-800-466-7835) in North America or 1-506-674-5470 outside North America. Nortel Networks Marketing Publications © Copyright 2001 Nortel Networks Corporation. Printed in USA, February 2001. Information subject to change. Nortel Networks Dept. 0526 Corporation reserves the right, without notice, to make changes in equipment design or components as changes in engineering or manufacturing methods warrant. Nortel Networks and the globemark are trademarks of Nortel Networks Corporation. P.O. Box 13010 87023.25/02-01 • Printed in USA February 2001 RTP, NC 27709