Application Notes | MRV Communications MR2228-S2C instruction

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

Contents

Stackable Fast Ethernet Switch Installation Guide Installation Guide Contents Appendix B Cables Introduction Switch ArchitectureOverview Description of Hardware Network Management Options10BASE-T/100BASE-TX Ports 1000BASE-T/SFP Ports Stacking Ports Port and System Status LEDs Port Status LEDs Condition Status Power Supply Receptacles System Status LEDs Features and Benefits ConnectivityExpandability Performance Management Introduction to Switching Network PlanningApplication Examples Collapsed Backbone Network Aggregation Plan Collapsed Backbone Remote Connections with Fiber Cable Network Aggregation Plan Making Vlan Connections Remote Connections with Fiber Cable Application Notes Making Vlan Connections Selecting a Site Installing the SwitchEthernet Cabling Equipment Checklist Package ContentsMounting Optional Rack-Mounting Equipment Rack Mounting Attaching the Brackets Desktop or Shelf Mounting Attaching the Adhesive Feet Installing an Optional SFP Transceiver Connecting Switches in a Stack Connecting to a Power Source Connecting Switches in a Ring-topology Stack Connecting to the Console Port Wiring Map for Serial Cable DTE Port Connecting Network Devices Connecting to PCs, Servers, Hubs and SwitchesMaking Network Connections Twisted-Pair Devices Network Wiring Connections Making Twisted-Pair Connections Network Wiring Connections Fiber Optic SFP Devices Connectivity Rules 1000BASE-T Cable Requirements Cable Labeling and Connection Records Mbps Gigabit Ethernet Collision DomainMbps Fast Ethernet Collision Domain Mbps Ethernet Collision DomainPage Appendix a Troubleshooting Diagnosing Switch IndicatorsPower and Cooling Problems Table A-1. Troubleshooting Chart Symptom Action In-Band Access InstallationStack Troubleshooting Twisted-Pair Cable and Pin Assignments Appendix B Cables10BASE-T/100BASE-TX Pin Assignments Straight-Through Wiring Crossover Wiring 1000BASE-T Pin Assignments Adjusting Existing Category 5 Cabling to Run 1000BASE-T Cable Testing for Existing Category 5 CableFiber Standards Appendix C Specifications Forwarding Mode Management Features In-Band ManagementSafety Throughput 1000BASE-T Auto-NegotiationBandwidth Collision Media Access Control MAC RJ-45 ConnectorSwitched Ports Ieee 802.3ab