SMC Networks SMC6724L2 manual Appendix a Troubleshooting, Diagnosing Switch Indicators

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APPENDIX A

TROUBLESHOOTING

Diagnosing Switch Indicators

	Troubleshooting Chart

Symptom	Action

Power LED is Off	• Internal power supply has failed or is
	disconnected.
	• Check connections between the switch, the
	power cord, the wall outlet.
	• 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 Compliances FCC Class aEC Conformance Declaration Class a Industry Canada Class a Iii Safety ComplianceWarnhinweis Faseroptikanschlüsse Optische Sicherheit Underwriters Laboratories Compliance StatementWichtige Sicherheitshinweise Germany Table of Contents Installing the Switch TroubleshootingMaking Network Connections Vii Viii Overview Chapter About Tigerswitch 10/100Management Options Switch Architecture10BASE-T/100BASE-TX Ports SMC6724L2 Description of HardwarePort and System LEDs Status LEDsSpanning Tree Protocol Switch ManagementMulticast Switching VLANsTraffic Priority Power Supply Receptacle Optional Media Extender ModuleOptional 1000BASE-SX Module SMC6724L2GSSC Features and Benefits ConnectivityExpandability Management PerformanceAbout the Tigerswitch 10/100 Chapter Network Planning Introduction to SwitchingCollapsed Backbone Sample ApplicationsMaking Vlan Connections Remote Connections with Fiber CableMaking Vlan Connections Connectivity Rules Mbps Gigabit Ethernet Collision DomainMbps Fast Ethernet Collision Domain Mbps Ethernet Collision Domain Maximum Network Diameter Using RepeatersMaximum Fast Ethernet Cable Distance SMC 5-4-3 RuleApplication Notes Network Planning Selecting a Site Installing the SwitchEquipment Checklist Package ContentsOptional Rack-Mounting Equipment Rack Mounting MountingAttaching the Brackets Attaching the Adhesive Feet Desktop or Shelf MountingPower Receptacle Connecting to a Power SourceChapter Making Network Connections Connecting Network DevicesTwisted-Pair Devices Cabling GuidelinesCrossover/Straight-Through Wiring Requirement Making Twisted-Pair Connections Connecting to PCs, Servers, Hubs and Switches Wiring Closet Connections Wiring Closet ConnectionsFiber Optic Devices Making SC Port Connections Diagnosing Switch Indicators Appendix a TroubleshootingPower and Cooling Problems InstallationIn-Band Access 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 AssignmentsDB-9 Port Pin Assignments Console Port to 9-Pin COM Port on PCConsole Port to 25-Pin DCE Port on Modem Console Port to 25-Pin DTE Port on PC Cables Physical Characteristics Appendix C SpecificationsTemperature WeightPower Supply Power ConsumptionSwitch Features Management Features Warranty StandardsCompliances 1000BASE-SX Extender Module Slide-in ModuleModel StandardsAppendix D Ordering Information Ordering Information Glossary-1 GlossaryAuto-Negotiation BandwidthGlossary-2 Glossary-3 Glossary-4 Switched Ports RJ-45 ConnectorGlossary-5 Network DiameterGlossary-6 Index-1 IndexIndex-2 Index-3 Index-4 Page Internet