Cisco Systems IE301024TC manual Switch LEDs, Switch Connections, Bad or Damaged Cable, Link Status

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Chapter 4 Troubleshooting

Diagnosing Problems

Switch LEDs

Look at the port LEDs information when troubleshooting the switch. See the “LEDs” section on page 1-8for a description of the LED colors and their meanings.

Switch Connections

Bad or Damaged Cable

Always examine the cable for marginal damage or failure. A cable might be just good enough to connect at the physical layer, but it could corrupt packets as a result of subtle damage to the wiring or connectors. You can identify this problem because the port has many packet errors or it constantly flaps (loses and regains link).

•Exchange the copper or fiber-optic cable with a known good cable.

•Look for broken or missing pins on cable connectors.

•Rule out any bad patch panel connections or media convertors between the source and the destination. If possible, bypass the patch panel, or eliminate media convertors (fiber-optic-to-copper).

•Try the cable in another port to see if the problem follows the cable.

Ethernet and Fiber-Optic Cables

Make sure that you have the correct cable:

•For Ethernet, use Category 3 copper cable for 10 Mb/s UTP connections. Use either Category 5, Category 5e, or Category 6 UTP for 10/100 or 10/100/1000 Mb/s connections.

•Verify that you have the correct fiber-optic cable for the distance and port type. Make sure that the connected device ports match and use the same type encoding, optical frequency, and fiber type.

•Determine if a copper crossover cable was used when a straight-through was required or the reverse. Enable auto-MDIX on the switch, or replace the cable. See Table 2-1for recommended Ethernet cables.

Link Status

Verify that both sides have link. A broken wire or a shutdown port can cause one side to show link even though the other side does not have link.

A port LED that is on does not guarantee that the cable is functional. It might have encountered physical stress, causing it to function at a marginal level. If the port LED does not turn on:

•Connect the cable from the switch to a known good device.

•Make sure that both ends of the cable are connected to the correct ports.

•Verify that both devices have power.

•Verify that you are using the correct cable type. See Appendix B, “Connector and Cable Specifications” for information.

•Look for loose connections. Sometimes a cable appears to be seated but is not. Disconnect the cable, and then reconnect it.

Cisco IE 3010 Switch Hardware Installation Guide

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Contents Cisco IE 3010 Switch Hardware Installation Guide Americas HeadquartersPage N T E N T S Wall-Mounting2-15 Power-Supply Module Specifications A-4 Accessing the CLI Through the Console Port C-1 Preface Obtaining Documentation and Submitting a Service Request Related PublicationsSwitch Models Model DescriptionCable Side Cisco IE-3010-24TC Cable-Side View10/100 Fast Ethernet Ports PoE PortsDual-Purpose Ports SFP Modules Type of SFP Module ModelPower-Input Terminal Alarm PortsSFP Module Patch Cable Alarm Input Alarm OutputManagement Ports Switch Panel LEDs LEDsSystem LED Power-Supply Module LEDsAlarm LEDs Color System StatusColor Description Console LEDsPort LEDs LED Color MeaningDual-Purpose Port LEDs SD Flash Memory CardPoE LED SD Flash Memory Card LEDPower-Supply Side PSU OK LEDPower-Supply Side LEDs USB LEDPower Supply Features Network ConfigurationsManagement Options Switch Installation 75 in .4 cm. Statement Installation Guidelines Verifying Switch OperationInstalling the Switch Rack-Mounting1and -2show how to attach brackets to the switches Attaching Brackets for 19-Inch Racks207231 Rubber plug Switch Inserting the Rubber Plugs 255740 255750 255751 Attaching Brackets for 23-Inch Racks Attaching 23-Inch BracketsAttaching Brackets for Etsi Racks Attaching Brackets for Etsi RacksRack-Mounting the Switch Wall-Mounting Attaching Brackets Attaching Brackets for IP-30 Compliance OptionalRubber plug Switch-side Wall-Mounting the Switch User-supplied screws15 Wall-Mounting the Cisco IE-3010-16S-8PC Installing and Removing SFP Modules Installing SFP ModulesInserting and Removing the SFP Module Patch Cable Removing SFP ModulesRemoving the SFP Module Patch Cable 18 Inserting an SFP Module Patch CableReplacing the SD Flash Memory Card 20 Loosening the Captive Screw22 Removing the SD Flash Memory Card Connecting Devices to the Ethernet Ports Connecting to the 10/100 and 10/100/1000 PortsConnecting to the 10/100 PoE Ports Device Crossover CableWhere to Go Next Page Power Supply Installation Power-Supply ModulesPower-supply module 3 Captive screw Power-Supply Module Installation Installation GuidelinesInstalling a Power-Supply Module Grounding the SwitchEquipment That You Need Stripping the Ground Wire Installing the Power-Supply Module in the Switch Crimping the Terminal LugWiring the Power Source Loosen the Screws on the Power Supply BlankOpening the Power-Input Terminal Cover AC 5 A, DC 15 a Statement100-240V~, 50-60Hz, 2A 10A 10A 11 Stripping the Input Power Source Wire 13 Connecting the Wires to the High-Voltage AC Power PSU1 Removing the Power-Supply Module AC power16 Removing the Power-Supply Module Page Diagnosing Problems Switch Post ResultsBad or Damaged Cable Switch LEDsSwitch Connections Ethernet and Fiber-Optic Cables10/100 PoE Port Connections Interface Settings10/100 and 10/100/1000 Port Connections SFP ModuleSpeed, Duplex, and Autonegotiation Switch PerformanceSpanning Tree Loops Autonegotiation and Network Interface CardsResetting the Switch to the Factory Default Settings Finding the Switch Serial NumberSerial Number Location for the Power-Supply Modules Switch Specifications Physical SpecificationsEnvironmental Ranges Power Requirements Power Requirements Power-Supply Module Specifications Power SpecificationsAlarm Ratings Page Connector Specifications 10/100SFP Module Connectors Figure B-2 Fiber-Optic SFP Module LC ConnectorAlarm Port Pin Alarm connectionCables and Adapters SFP Module CablesExtended temperature SFPs GLC-EX-SMDCable Pinouts TP3Console Port Adapter Pinouts DSR DTR CTS RTSSwitch Console RJ-45-to-DB-25 Port DTE Adapter Device Accessing the CLI Through the Console Port RJ-45 Console PortFigure C-1 Connecting the Console Cable USB Console Port USB console port USB port on the PCInstalling the Cisco Microsoft Windows USB Device Drivers Installing the Cisco Microsoft Windows XP USB DriverInstalling the Cisco Microsoft Windows 2000 USB Driver Uninstalling the Cisco Microsoft Windows USB Drivers Installing the Cisco Microsoft Windows Vista USB DriverUninstalling the Cisco Microsoft Windows Vista USB Driver Using the Setup.exe ProgramEntering the Initial Configuration Information IP SettingsCompleting the Setup Program Enter virtual terminal password terminal-password These choices appear Cisco IE 3010 Switch Hardware Installation Guide Numerics IN-2 IN-3 IN-4 IN-5 IN-6
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