Application Notes - SMC Networks SMC8724ML3 Installation Manual

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. For network applications that require routing between dissimilar
network types, you can attach these switches directly to a multi-
protocol router. However, if you have to interconnect distinct VLANs
or IP subnets, you can take advantage of the wire-speed Layer 3
routing provided by these switches.
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
• 1000BASE-LX: 5 km (3.1 miles) for single-mode fiber
• 1000BASE-ZX: 100 km (62.1 miles) for single-mode fiber
• 10GBASE-LR: 10 km (6.2 miles) for single-mode fiber
• 10GBASE-SR: 300 m (984 ft) for multimode fiber
• 10GBASE-ER: 40 km (24.8 miles) for single-mode fiber
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.
A N
PPLICATION OTES
2-7