Installation Guide

C HAPTER 3 | Making Network Connections
Application Notes
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APPLICATION NOTES
1. Full-duplex operation only applies to point-to-point access (such as when a
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.
2. Avoid using flow control on a port connected to a hub unless it is actually
required to solve a problem. Otherwise back pressure jamming signals may
degrade overall performance for the segment attached to the hub.
3. Based on recommended standards, the length of fiber optic cable for a
single switched link should not exceed:
■
10GBASE-SR: 300 m (984 ft) for multimode fiber.
■
10GBASE-LR: 10 km (6.2 miles) for single-mode fiber.
■
10GBASE-ER: 40 km (25 miles) for single-mode fiber.
■
1000BASE-SX: 550 m (1805 ft) for multimode fiber.
■
1000BASE-LX: 10 km (6.2 miles) for single-mode fiber.
■
1000BASE-LH: 70 km (43.5 miles) for single-mode fiber.
■
100BASE-FX: 20 km (12.4 miles) for single-mode fiber.
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.