mirror of https://github.com/tLDP/LDP
59 lines
1.9 KiB
XML
59 lines
1.9 KiB
XML
<sect1 id="FDDI">
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<title>FDDI</title>
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<para>
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FDDI (Fiber Distributed Data Interface) is a high-speed, reliable, long-distance
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networking scheme often used for network backbones and networks that require
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high bandwidth. FDDI uses fiber optic cable wired in a true ring. It supports
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speeds up to 100 Mbps and a maximum distance bewteen nodes of 100 kilometers
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(62 miles).
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</para>
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<para>
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FDDI uses token-passing scheme wired into two rings, primary and secondary. The
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primary ring is used for normal networking. When a failure is detected, the
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secondary ring is used in the opposite direction to compensate for the failure
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in the primary ring.
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</para>
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<para>
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The advantages of FDDI are their high speed, long distance, and reliablity.
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The token-passing scheme used by FDDI is also more sophisticated than that
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of Token Ring: it allows multiple packets to be on the ring at once, and
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allows certain nodes to be given higher priority than the rest. The
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disadvantage of FDDI is its high cost and the difficult in installing and
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maintaing fiber optic cable.
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</para>
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<para>
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FDDI device names are `fddi0', `fddi1', `fddi2' etc. The first card
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detected by the kernel is assigned `fddi0' and the rest are assigned
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sequentially in the order they are detected.
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</para>
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<para>
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Larry Stefani, lstefani@ultranet.com, has developed a driver for the
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Digital Equipment Corporation FDDI EISA and PCI cards.
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</para>
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<para>
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When you have your kernel built to support the FDDI driver and
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installed (the compilation options are given below), configuration
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of the FDDI interface is virtually identical to that of an ethernet
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interface. You just specify the need to replace the Ethernet interface
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names with appropriate FDDI interface names in the ifconfig and route commands.
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</para>
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<para>
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<screen>
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Kernel Compile Options:
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Network device support --->
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[*] FDDI driver support
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[*] Digital DEFEA and DEFPA adapter support
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</screen>
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</para>
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</sect1>
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