Application notes, Application notes -6 – SMC Networks SMC TigerCard 10G User Manual

Page 38

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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. As a general rule the length of fiber optic cable for a single switched

link should not exceed:

1000BASE-SX: 550 m (1805 ft) for MMF

1000BASE-LX: 5 km (3.1 miles) for SMF

1000BASE-ZX: 100 km (62.1 miles) for SMF

However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.

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