This paper deals with a real-world Gigabit Ethernet over WDM migration at a corporate headquarter of a well known international organisation. A prominent communications provider needed to upgrade its enterprise network in order to ensure reliable infrastructure support to the emerging e-businessapplications.
A Transition Path to Gigabit Ethernet over WDM in Support of Emerging e-Business Applications STANISLAV MILANOVIC *, NIKOS E. MASTORAKIS # * WSEAS, Highest Institute of Education, Science and Technology Haghiou I. Theologou 17 15773, Zographou, Athens, GREECE Stanislav.Milanovic@wseas.org http://www.wseas.org/hiest # MILITARY INSTITUTIONS OF UNIVERSITY EDUCATION HELLENIC NAVAL ACADEMY Terma Hatzikyriakou, 18539, Piraeus, GREECE. email@example.com http://www.hna.gr/index-hna.htm Abstract: - This paper deals with a real-world Gigabit Ethernet over WDM migration at a corporate headquarter of a well known international organisation. A prominent communications provider needed to upgrade its enterprise network in order to ensure reliable infrastructure support to the emerging e-business applications. Key-Words: - Gigabit Ethernet Technology, WDM, e-Business, Internet/Intranet 1 Introduction them, traditional local area network (LAN) infrastructures must be upgraded to higher- The Internet Revolution is changing how we do performing switched topologies. business. Recent advances in mission-critical web applications (enterprise resource planning, e- Traditional wide area networks (WAN) may also commerce, Voice-over-IP, server co-location and need to be upgraded to higher-speed services private Intranets), together with the wide-spread use (xDSL, cable modems, ATM, Frame Relay, ISDN) of the public Internet, are encouraging the to ensure robust application performance over development of new business and consumer WAN and remote access connections [1-6]. What's relationships. A growing number of e-business more, Quality of Service (QoS) is a necessity when applications are helping plan and manage resources, mission-critical e-business application traffic is distribute information, provide customer services, moving across the network. and enable electronic commerce. Information is available from multiple sources, network traffic is The long-term implication is that users will unpredictable and performance demands are great. increasingly demand solutions for gigabit Change is rapid and constant. And the emergence networking whose specific requirements include of newer applications will keep the momentum of tens if not hundreds of gigabits per second of total change moving. network capacity, any-to-any communication, smooth migration of scalable performance that can Twenty-first century businesses require intelligent be incrementally implemented anywhere in the and economical networks to gather, publish, share network, and strong compatibility with the and modify information. At the base of any infrastructure of existing enterprise networks. successful e-business application is a highly sophisticated, high-performance network. The New Internet Economy is profoundly Corporate network can become the most strategic transforming all private enterprises and public asset and the most powerful competitive advantage institutions. The question is no longer if or when it in the marketplace. E-business packages generally will impact an organization, but rather how to assume a highly scalable and available Internet execute the transformation. Protocol (IP) network infrastructure. To support 2. Gigabit Ethernet Technology to mix data and video over Ethernet through a combination of the following: Overview • Increased bandwidth provided by Fast Ethernet and Gigabit Ethernet, enhanced by LAN Gigabit Ethernet provides 1Gb/s throughput (2Gb/s switching, full-duplex) for campus networks with the simplicity of Ethernet at lower cost than other • The emergence of new protocols, such as technologies of comparable speed. All three Resource Reservation Protocol (RSVP), that Ethernet speeds use the same IEEE 802.3 frame provide bandwidth reservation. format, full-duplex operation and IEEE 802.3x flow • The emergence of new standards such as control methods . In half-duplex mode, Gigabit 802.1Q and 802.1p which will provide virtual Ethernet employs the same fundamental Carrier LAN (VLAN) and explicit priority information Sense Multiple Access with Collision Detection for packets in the network, (CSMA/CD) protocol to resolve contention for the • The widespread use of advanced video shared media. compression such as MPEG-2. The emergence of Intranet applications portends a These technologies and protocols combine to make migration to new data types, including video, voice Gigabit Ethernet an extremely attractive solution and 3-D visualizations of complex images. In the for the delivery of video and multimedia traffic, as past it was thought that video might require a illustrated in Figure 1. different networking technology designed specifically for multimedia. But today it is possible Figure 1. High-Speed Network Capabilities Gigabit Ethernet, like all Ethernet specifications, communicate the priority of packets to specifies the data link (layer 2) of the OSI protocol internetworking devices. model . Gigabit Ethernet provides high-speed connectivity, but does not by itself provide a full set RSVP support can be achieved by mapping RSVP of services such as Quality of Service (QoS), sessions into 802.1p service classes. The Resource automatic redundant fail-over or higher-level Reservation Protocol (RSVP) is a network-control routing services; these are added via other open protocol that enables Internet applications to obtain standards. special qualities of service (QoSs) for their data flows. RSVP is not a routing protocol; instead, it 802.1p and 802.1Q (Layer 2 functions) facilitate works in conjunction with routing p
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