SMC Networks 48-Port manual Appendix a Troubleshooting, Diagnosing Switch Indicators

Page 47

APPENDIX A

TROUBLESHOOTING

Diagnosing Switch Indicators

	Troubleshooting Chart

Symptom	Action

Power LED is Off	• Internal or redundant power supply has failed or
	is disconnected.
	• Check connections between the switch, the
	power cord, the wall outlet, and the RPU if you
	are using one.
	• If the switch is installed in a rack, check the
	connections to the punch-down block and patch
	panel.
	• Contact SMC Tech Support.

Power LED is Flashing	• The switch is either downloading firmware or
	running the Power-On Self-Diagnostics Test
	(POST). If this LED does not stop flashing, then
	POST has failed, and you should contact SMC
	Tech Support.

Link 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.
	• 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.

A-1

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Contents TigerSwitch 10/100 Page TigerSwitch 10/100 Installation Guide Trademarks Limited Warranty Limited Warranty EC Conformance Declaration Class a CompliancesFCC Class a Industry Canada Class a Underwriters Laboratories Compliance Statement Safety ComplianceIii Warnhinweis Faseroptikanschlüsse Optische SicherheitWichtige Sicherheitshinweise Germany Table of Contents Making Network Connections Installing the SwitchTroubleshooting A-1 Vii Specifications C-1Cables B-1 Ordering Information D-1 Glossary IndexViii Overview Chapter About Tigerswitch 10/100Rear Panel Switch Architecture10BASE-T/100BASE-TX Ports SMC6948L2 Description of HardwareManagement Options LED Status LEDsNetwork Management Module Network Management ModuleVLANs Spanning Tree ProtocolTraffic Priority Multicast SwitchingOptional Media Extender Modules Power Supply Receptacles Optional Redundant Power Unit SMCRPU150WExpandability Features and BenefitsConnectivity Management PerformanceChapter Network Planning Introduction to SwitchingCollapsed Backbone Sample ApplicationsCentral Wiring Closet Central Wiring ClosetRemote Connections with Fiber Cable Collapsed Backbone Using Fiber CableMaking Vlan Connections Making Vlan ConnectionsMaximum Fiber Optic Cable Distance for 1000BASE-SX Connectivity RulesMbps Gigabit Ethernet Collision Domain SMC 2-1 Rule for Class I Repeaters Maximum Network Diameter Using RepeatersMbps Fast Ethernet Collision Domain SMC 3-2 Rule for Class II RepeatersMaximum Ethernet Cable Distance Mbps Ethernet Collision DomainSMC 5-4-3 Rule Application Notes Network Planning Selecting a Site Installing the SwitchOptional Rack-Mounting Equipment Equipment ChecklistPackage Contents Rack Mounting MountingAttaching the Brackets Attaching the Adhesive Feet Desktop or Shelf MountingPower Receptacle Connecting to a Power SourceChapter Making Network Connections Connecting Network Devices1. Making Twisted-Pair Connections Connecting to PCs, Servers, Hubs and SwitchesWiring Closet Connections Wiring Closet Connections Fiber Optic Devices Making SC Port Connections Making Network Connections Diagnosing Switch Indicators Appendix a TroubleshootingIn-Band Access Power and Cooling ProblemsInstallation Troubleshooting Troubleshooting Appendix B Cables SpecificationsTwisted-Pair Cable and Pin Assignments Figure B-1. RJ-45 Connector Pin Numbers100BASE-TX/10BASE-T Pin Assignments Straight-Through WiringCrossover Wiring Figure B-2. DB-9 Console Port Pin Numbers Console Port Pin AssignmentsConsole Port to 25-Pin DCE Port on Modem DB-9 Port Pin AssignmentsConsole Port to 9-Pin COM Port on PC Console Port to 25-Pin DTE Port on PC Cables Physical Characteristics Appendix C SpecificationsPower Consumption WeightTemperature Power SupplySwitch Features Management Features Emissions SafetyStandards CompliancesWarranty Model Slide-in Module100BASE-FX Extender Module 1000BASE-SX Extender ModuleSMC6948NMM Appendix D Ordering Information Ordering Information Bandwidth GlossaryGlossary-1 Auto-NegotiationGlossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6 Index-1 IndexIndex-2 See RPU Index-3Index-4 Page Internet