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| Network Planning
C
2
HAPTER
Application Notes
A
PPLICATION
Full-duplex operation only applies to point-to-point access (such as when a
1.
switch is attached to a workstation, server or another switch). When the
switch is connected to a hub, both devices must operate in half-duplex
mode.
Avoid using flow control on a port connected to a hub unless it is actually
2.
required to solve a problem. Otherwise back pressure jamming signals may
degrade overall performance for the segment attached to the hub.
Based on recommended standards, the length of fiber optic cable for a
3.
single switched link should not exceed:
1000BASE-SX: 550 m (1805 ft) for multimode fiber.
■
1000BASE-LX: 5 km (3.1 miles) for single-mode fiber.
■
1000BASE-LH: 70 km (43.5 miles) for single-mode fiber.
■
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.
N
OTES
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Troubleshooting
