User's Manual

N ETWORK P LANNING
2-6
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. To interconnect distinct VLANs or IP subnets, you can attach the
switch to a standard Layer 3 router. For network applications that
require routing between dissimilar network types, attach the switch to a
multi-protocol router.
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 multimode fiber, duplex fiber
• 1000BASE-LX: 10 km (6.2 miles) for single-mode fiber, duplex
fiber
• 1000BASE-ZX: 70 km (43 miles) for single-mode fiber, duplex
fiber
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.