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A
PPENDIX
A: C
ONFIGURATION
R
ULES
Configuration Rules
for Fast Ethernet
The topology rules for 100 Mbps Fast Ethernet are slightly different to
those for 10 Mbps Ethernet. Figure 20
illustrates the key topology rules
and provides examples of how they allow for large-scale Fast Ethernet
networks.
Figure 20
Fast Ethernet configuration rules
The key topology rules are:
■
Maximum UTP cable length is 100 m (328 ft) over Category 5 cable.
■
A 412 m (1352 ft) fiber link is allowed for connecting
switch-to-switch, or endstation-to-switch, using half-duplex
100BASE-FX.
■
A total network span of 325 m (1066 ft) is allowed in single-repeater
topologies (one hub stack per wiring closet with a fiber link to the