SMC Networks SMC8724ML3 manual Diagnosing Power Problems with the LEDs, Table A-2 Power/RPU LEDs

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TROUBLESHOOTING

Table A-1 Troubleshooting Chart (Continued)

Symptom	Action

Stack Link LED is	• The uplink/downlink has failed.
Flashing Green/Amber	• For the indicated stack link, check that the stacking
	• For the indicated stack link, check that the stacking
	cables are properly connected. Replace the stacking
	cable if necessary.
	• Power cycle the switch to try and clear the condition.

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.

Diagnosing Power Problems with the LEDs

The Power and RPU LEDs work in combination to indicate power status as follows.

		Table A-2 Power/RPU LEDs
Power LED	RPU LED		Status

Green	Green		Internal power functioning normally; RPU is present.

Green	Amber		Internal power functioning normally; RPU plugged in but
			faulty.

Green	Off		Internal power functioning normally; RPU not plugged in.

Amber	Green		Internal power faulty; RPU delivering power.

Off	Off		Both internal power and RPU unplugged or not functioning.

A-2

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Contents TigerStack Page TigerStack Installation Guide Trademarks Limited Warranty SMC Networks, Inc Tesla Irvine, CA Compliances FCC Class aIndustry Canada Class a Japan Vcci Class aCE Mark Declaration of Conformance for EMI and Safety EEC Safety Compliance Power Cord SafetyAustralia AS/NZS 3548 1995 Class a Warnhinweis Faseroptikanschlüsse Optische SicherheitPower Cord Set Vii France et Pérou uniquementViii SchukoEnvironmental Statement Audience PurposeRelated Publications Table of Contents Making Network Connections XiiAppendices XiiiTables XivFigures Xvi FiguresChapter About Tigerstack OverviewSwitch Architecture Front PanelsNetwork Management Options Description of Hardware10/100/1000BASE-T Ports SFP Slots Stacking PortsPort and System Status LEDs Port LEDs Port Status LEDsSystem Status LEDs Optional Redundant Power Unit Power Supply SocketsOptional Media Extender Modules Extender Module LEDs10G Xenpak Module Module LEDsFeatures and Benefits ConnectivityExpandability PerformanceManagement Introduction to Switching Chapter Network PlanningApplication Examples Collapsed BackboneNetwork Aggregation Plan Network Aggregation PlanRemote Connections with Fiber Cable Remote Connections with Fiber CableMaking Vlan Connections Making Vlan ConnectionsUsing Layer 3 Routing IP Routing for Unicast TrafficApplication Notes Network Planning Installing the Switch Selecting a SiteEthernet Cabling RJ-45 ConnectionsPackage Contents Equipment ChecklistOptional Rack-Mounting Equipment Mounting Rack MountingAttaching the Brackets Montage Rack Mounting German Rack-MontageDesktop or Shelf Mounting Attaching the Adhesive FeetInstalling an Optional Module into the Switch Installing an Optional ModuleInstalling an Optional SFP Transceiver into the Switch Inserting an SFP Transceiver into a SlotConnecting Switches in a Stack Making Stacking Connections Stacking Topologies Connecting to a Power Source Power SocketWiring Map for Serial Cable Connecting to the Console PortWiring Map for Serial Cable Connecting Network Devices Chapter Making Network ConnectionsTwisted-Pair Devices Cabling GuidelinesConnecting to PCs, Servers, Hubs and Switches Making Twisted-Pair ConnectionsNetwork Wiring Connections Wiring Closet ConnectionsFiber Optic SFP Devices Gbps Fiber Optic Connections Making Connections to SFP TransceiversConnecting to Xenpak Transceiver Connectivity Rules 1000BASE-T Cable RequirementsGbps Ethernet Collision Domain Maximum 10GBASE-SR 10 Gigabit Ethernet Cable LengthMbps Gigabit Ethernet Collision Domain Mbps Fast Ethernet Collision Domain Mbps Ethernet Collision DomainMaximum 1000BASE-ZX Fiber Optic Cable Length Maximum Fast Ethernet Cable LengthCable Labeling and Connection Records Diagnosing Switch Indicators Appendix a TroubleshootingTable A-1 Troubleshooting Chart Diagnosing Power Problems with the LEDs Table A-2 Power/RPU LEDsInstallation Power and Cooling ProblemsIn-Band Access Stack Troubleshooting Appendix B Cables Twisted-Pair Cable and Pin Assignments10BASE-T/100BASE-TX Pin Assignments Table B-1 10/100BASE-TX MDI and MDI-X Port PinoutsStraight-Through Wiring Figure B-2 Straight-through WiringCrossover Wiring Figure B-3 Crossover Wiring1000BASE-T Pin Assignments Cable Testing for Existing Category 5 CableTable B-2 1000BASE-T MDI and MDI-X Port Pinouts Adjusting Existing Category 5 Cabling to Run 1000BASE-T Fiber StandardsAppendix C Specifications Physical CharacteristicsSwitching Database WeightTemperature Power SupplySwitch Features Management FeaturesSafety StandardsCompliances CE Mark EmissionsExtender Modules Warranty10G Extender Module Xenpak Specifications Table D-1 TigerStack 1000 Products and Accessories Appendix D Ordering InformationOrdering Information Glossary-1 Glossary1000BASE-T Glossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6 Index Index-1Index-2 Index-3 Index-4 Page For Technical SUPPORT, Call