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
MILITARY INSTITUTIONS OF UNIVERSITY EDUCATION
HELLENIC NAVAL ACADEMY
Terma Hatzikyriakou, 18539, Piraeus, GREECE.
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
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
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