Application Notes | Enterasys Networks V2H124-24P guide

2 Network Planning

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) using multimode fiber

•1000BASE-LX: 5 km (3.2 miles) using single-mode fiber

•100BASE-LH: 70 km (43.5 miles) using 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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Enterasys Networks V2H124-24P manual Application Notes

Contents

Matrix V-Series V2H124-24P Fast Ethernet Switch Page Page Regulatory Compliance Information Environmental Requirements Safety Compliance Power Cord Set France et Pérou uniquement Vii Declaration of Conformity Enterasys Networks, Inc Firmware License Aggreement Page Page Xii Contents Appendix C Specifications C-1 Glossary Index Tables Figures Figures Introduction Switch ArchitectureOverview Power-over-Ethernet Capability Network Management Options 1000BASE-T/SFP Ports Description of Hardware10/100BASE-T Ports Port and System Status LEDs System Status LEDs System Status LEDs Mode PoE/Link Button Stack Master Button Power Supply Receptacle Optional Stacking Transceiver Performance Features and BenefitsConnectivity Management Introduction to Switching Network Planning Application Examples Collapsed Backbone Network Aggregation Plan Network Aggregation Plan Remote Connections with Fiber Cable Remote Connections with Fiber Cable Making Vlan Connections Making Vlan Connections Application Notes Selecting a Site Installing the SwitchEthernet Cabling Package Contents Equipment ChecklistGetting Help Optional Rack-Mounting Equipment MountingRack Mounting Installing the Switch in a Rack Desktop or Shelf Mounting Installing an SFP Transceiver Installing an SFP Transceiver Stacking Switches Installing a Stacking Transceiver Connecting Switches in a Stack Connecting Switches in a Stack Connecting to a Power Source Connecting to the Console Port Wiring Map for Serial Cable DTE Port Installing the Switch Making Network Connections Connecting Network DevicesPower-over-Ethernet Connections Twisted-Pair Devices Connecting to PCs, Servers, Hubs and Switches Cabling Guidelines Network Wiring Connections Network Wiring Connections Fiber Optic Devices Making Fiber Port Connections 1000BASE-T Cable Requirements Connectivity RulesMbps Gigabit Ethernet Collision Domain Mbps Fast Ethernet Collision Domain Cable Labeling and Connection RecordsMbps Ethernet Collision Domain Diagnosing Switch Indicators Appendix a TroubleshootingPower and Cooling Problems In-Band Access InstallationStack Troubleshooting Twisted-Pair Cable and Pin Assignments Appendix B Cables10/100BASE-TX Pin Assignments Straight-Through Wiring Crossover Wiring 1000BASE-T Pin Assignments Twisted-Pair Cable and Pin Assignments B Cable Testing for Existing Category 5 Cable Fiber Standards Appendix C Specifications Physical Characteristics Switch Features Management Features Standards Compliances Specifications Glossary 10BASE-T Ieee LED Virtual LAN Vlan Index Numerics Index-2 Page ES3526-PoE-60 P/N 150200039300A E042004-R01