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Nolle says that such fiber-rich networks combined with switching and high-speed protocols like Gigabit Ethernet are an important strategy for network managers confronted with a constant increase in applications. Nolle says that while many organizations presently have limited fiber to vertical runs between floors, users are increasingly moving fiber into the horizontal links that connect servers to servers and servers to the network. "Users would be doing themselves a disservice if they implement Gigabit Ethernet on copper," says Tom Nolle, president of CIMI, a Voorhees, NJ-based network consulting company. However, since Gigabit Ethernet is viewed primarily as a backbone technology, the wisdom of using it over copper has been questioned in many quarters. Still, there remain many standards and design issues to be ironed out in Gigabit Ethernet, including the specification for copper transmission. Grow says that in addition to the economies associated with building on existing technology, Gigabit Ethernet`s evolutionary approach will hold appeal for users and application developers already familiar with the Ethernet model of networking. Grow says that while the demonstration was not a rigorous interoperability test, it did show that various Gigabit Ethernet suppliers could exchange data among their products. This was highlighted at Networld + Interop in Las Vegas, where 7 of the approximately 20 Gigabit Ethernet LAN vendors in attendance demonstrated their products working together. The use of Fibre Channel`s underpinnings is one reason that Gigabit Ethernet has moved so quickly from the drawing board to actual product. For example, it is now possible to buy a Fast Ethernet Network Interface Card for $63, he says-a very attractive price for a network technology that is only several years old. Thus, he sees the success of Fast Ethernet as a harbinger of good things for Gigabit Ethernet. According to Grow, just as Fast Ethernet borrowed from FDDI and Ethernet, Gigabit Ethernet has borrowed from Fibre Channel, including its transceiver designs. Grow, whose company was an FDDI pioneer and is now a member of the Gigabit Ethernet camp, thinks Gigabit Ethernet can succeed by taking the same tack as Fast Ethernet. "The existing FDDI physical-layer specifications for fiber and for copper were taken to do Fast Ethernet," he says. To make matters worse, Ethernet further evolved to Fast Ethernet, which "stole all of FDDI`s underlying technology," according to Bob Grow, vice president of industry relations at XLNT Inc., a San Diego, CA-based producer of network technology and an original equipment manufacturer for major vendors. As a new wrinkle on an existing technology, switched Ethernet was well-understood by users and did not involve the major network upgrades required by FDDI. But with the advent of switched Ethernet-which gave bandwidth- hungry users easier access to all of Ethernet`s existing 10 Mbits-a potent alternative had arrived. Advocates even attempted to push a copper version of the technology to circumvent these obstacles. Yet while the 100-megabit-per-second protocol has proven to be a useful niche technology, it has never sold in anywhere near the quantities envisioned by its advocates-which, at one time, included nearly all of the networking vendors.įDDI`s problems began with the high price of the necessary optoelectronic devices and the general scarcity of fiber in desktop environments. The technology emerged in the late 1980s and early 1990s with the promise of providing an order of magnitude more bandwidth than Ethernet. What is the reality behind all of the hype? On the theory that a look at the past is helpful in attempting to divine the future, an examination of other high-speed alternatives to Ethernet may be instructive in evaluating Gigabit Ethernet`s potential in the marketplace.įrom the perspective of fiber deployment, Fiber Distributed Data Interface (FDDI) provides an instructive case study. Like its predecessors, Gigabit Ethernet is being hailed as a potential spur for fiber deployment. The emerging ieee 802.3 standard specification is merely the latest in a long line of local area network (LAN) protocols touted as the next big thing in high-speed networking.
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If the current buzz about Gigabit Ethernet sounds familiar, it should. The past is prologue for Gigabit Ethernet