MRV Communications MR2228-S2C manual Application Notes, Making Vlan Connections

Figure 2-4. Making VLAN Connections

Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, Use untagged ports.

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 multimode fiber.
• 1000BASE-LX: 5 km (3.1 miles)	for singlemode fiber.

• 1000BASE-LH: 70 km (43.5 miles) for singlemode fiber.

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

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