6724L3 1-a.book - SMC

Application Notes
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. For network applications that require routing between dissimilar
network types, you can attach the TigerSwitch 10/100 units 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 this switch.
4. The multimode fiber modules are fitted with SC connectors, but you
can attach an ST plug to the switch using an SC-to-ST plug converter.
If you do use an ST plug converter, be sure you run cable from the Rx
(Tx) port on the module to the Tx (Rx) port on the target device.
5. As a general rule:
• the length of Gigabit fiber optic cable for a single switched link
should not exceed 550 m (1805 ft) for 1000BASE-SX multimode
fiber or 5 km (16404 ft) for 1000BASE-LX single-mode fiber.
• the length of 100BASE-FX fiber optic cable for a single switched
link should not exceed 2 km (1.24 miles) for multimode fiber or 20
km (2.43 miles) for single-mode fiber.
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.
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