Enterasys Networks V2H124-24P manual Appendix a Troubleshooting, Diagnosing Switch Indicators

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Appendix A: Troubleshooting

Diagnosing Switch Indicators

Table A-1. Troubleshooting Chart
Symptom	Action

PWR LED is Off	• Internal power supply may be disconnected. Check connections
	between the switch, the power cord and the wall outlet.

Diag LED is Amber	• The system has detected a fault. Power cycle the switch to try and
	clear the condition.
	• If the condition does not clear, contact your dealer for assistance.

Diag LED is Flashing Amber	• Check that all stacking cables are properly connected.

Stack LED is Flashing Green or	• The stack has not completed its initial configuration. Wait a few
Amber	minutes for the process to complete.
	• If flashing continues, check that the Master Select button is pressed in
	on only one switch.
	• Check that all stacking cables are properly connected.

Link/Act LED is Off	• Verify that the switch and attached device are powered on.
	• Be sure the cable is plugged into both the switch and corresponding
	device.
	• If the switch is installed in a rack, check the connections to the
	punch-down block and patch panel.
	• Verify that the proper cable type is used and its length does not exceed
	specified limits.
	• Check the adapter on the attached device and cable connections for
	possible defects. Replace the defective adapter or cable if necessary.

Note: For additional troubleshooting information, go to the Enterasys Global Knowledgebase web site: http://knowledgebase.enterasys.com/esupport/

Power and Cooling Problems

If the power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply. However, if the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet, and verify that the fans on the unit are unobstructed and running prior to shutdown. If you still cannot isolate the problem, the internal power supply may be defective.

A-1

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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 Switch Architecture IntroductionOverview Network Management Options Power-over-Ethernet CapabilityPort and System Status LEDs Description of Hardware10/100BASE-T Ports 1000BASE-T/SFP PortsSystem Status LEDs System Status LEDs Stack Master Button Mode PoE/Link ButtonOptional Stacking Transceiver Power Supply ReceptacleManagement Features and BenefitsConnectivity PerformanceNetwork Planning Introduction to SwitchingCollapsed Backbone Application ExamplesNetwork Aggregation Plan Network Aggregation PlanRemote Connections with Fiber Cable Remote Connections with Fiber CableMaking Vlan Connections Making Vlan ConnectionsApplication Notes Installing the Switch Selecting a SiteEthernet Cabling Equipment Checklist Package ContentsGetting Help Mounting Optional Rack-Mounting EquipmentRack Mounting Desktop or Shelf Mounting Installing the Switch in a RackInstalling an SFP Transceiver Installing an SFP TransceiverInstalling a Stacking Transceiver Stacking SwitchesConnecting Switches in a Stack Connecting Switches in a StackConnecting to the Console Port Connecting to a Power SourceDTE Port Wiring Map for Serial CableInstalling the Switch Twisted-Pair Devices Connecting Network DevicesPower-over-Ethernet Connections Making Network ConnectionsCabling Guidelines Connecting to PCs, Servers, Hubs and SwitchesNetwork Wiring Connections Network Wiring Connections Making Fiber Port Connections Fiber Optic DevicesConnectivity Rules 1000BASE-T Cable RequirementsMbps Gigabit Ethernet Collision Domain Cable Labeling and Connection Records Mbps Fast Ethernet Collision DomainMbps Ethernet Collision Domain Appendix a Troubleshooting Diagnosing Switch IndicatorsPower and Cooling Problems Installation In-Band AccessStack Troubleshooting Appendix B Cables Twisted-Pair Cable and Pin Assignments10/100BASE-TX Pin Assignments Crossover Wiring Straight-Through WiringTwisted-Pair Cable and Pin Assignments B 1000BASE-T Pin AssignmentsFiber Standards Cable Testing for Existing Category 5 CablePhysical Characteristics Appendix C SpecificationsManagement Features Switch FeaturesCompliances StandardsSpecifications 10BASE-T GlossaryIeee LED Virtual LAN Vlan Numerics IndexIndex-2 Page ES3526-PoE-60 P/N 150200039300A E042004-R01