3Com 3c17300 Implementation Guide - Page 78

Configuration Rules for Fast Ethernet, A 412 m 1352 ft fiber link is allowed for connecting

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80 APPENDIX A: CONFIGURATION RULES Configuration Rules for Fast Ethernet The topology rules for 100 Mbps Fast Ethernet are slightly different to those for 10 Mbps Ethernet. Figure 22 illustrates the key topology rules and provides examples of how they allow for large-scale Fast Ethernet networks. Figure 22 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

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80
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 22
illustrates the key topology rules
and provides examples of how they allow for large-scale Fast Ethernet
networks.
Figure 22
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