Cisco Systems 3560-C manual Switch LEDs, Switch Connections, Bad or Damaged Cable, Link Status

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Chapter 3 Troubleshooting

Diagnosing Problems

Switch LEDs

Look at the port LEDs information when troubleshooting the switch. See the “LEDs” section on page 1-12for 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.

Catalyst 3560-C and 2960-C Switch Hardware Installation Guide

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Contents Americas Headquarters Text Part Number OL-23803-02Page N T E N T S Switch Installation Switch LEDs OL-23803-02 Preface Obtaining Documentation and Submitting a Service Request Related PublicationsSwitch Models Switch Model DescriptionFront Panel 3 4 Catalyst 3560CPD-8PT-S Front Panel View PoE Ports Switches with PoE Ports 10/100 and 10/100/1000 Fast Ethernet Downlink PortsPoE Pass-Through PoE Pass-Through PoE Budgeting for the Catalyst 2960CPD-8PT-L USB Type a Port Dual-Purpose PortsSFP Modules GLC-FE-100FX= GLC-FE-100LX= GLC-FE-100BX-D=Management Ports USB Mini-Type B PortSwitch Panel LEDs LEDsSystem LED Console LEDsColor System Status Color DescriptionPort Mode Description Port status Port status. This is the default modeModes for Port LEDs Port LEDsDual-Purpose Port LEDs PoE LEDColor Meaning Security slot Power adapter connector Reset button Rear PanelAuxiliary Power Adapter Internal Power SupplyAuxiliary power adapter Management Options Reset ButtonSecurity Slots Network Configurations Cisco IOS CLISwitch Installation Preparing for InstallationStatement Installation Guidelines Box Contents Powering the SwitchEquipment That You Supply Verifying Switch Operation Mounting the SwitchDesk, Shelf, or Wall with Mounting Screws On a Desk or Shelf without Mounting ScrewsDesk- or Shelf-Mounting Installing the Mounting Screws on Top of a Desk or a Shelf Mounting the Switch on Top of a Desk or Shelf Under the Desk- or Shelf-MountingInstalling the Mounting Screws Under a Desk or Shelf Desk or shelf Screws Screw template AdhesiveWall-Mounting Desk or shelf Slides on this way77 in .49 cm 72 in .44 cm 46. 62 in .19 cm Switch Location of the Mounting Holes on the SwitchInstalling the Mounting Screws on the Wall With a Mounting Tray Mounting Tray with ScrewsSwitch Mounting tray Sliding direction Desk Installing the Switch on the Mounting TraySwitch Number-10 Phillips pan-head screws Mounting Tray with a MagnetPlace the switch on the mounting tray. See Figure 11 Placing the Switch on the Mounting Tray13 Wall-Mounting with a Magnet A Rack Attaching Brackets to the SwitchPhillips flat-head screw Mounting the Switch in a Rack 15 Attaching the 23-inch Brackets for Rack-MountingAttaching the DIN-Mount Tray to the Switch Place the switch on the DIN rail mount. See FigureSwitch DIN rail mount On a DIN RailMounting the Switch on a DIN Rail 18 Securing the DIN-Mount Tray to the Switch19 Mounting the Switch on a DIN Rail Removing the Switch from a DIN Rail Installing a Cover for the Reset Button Optional Switch Reset button coverInstalling the Power Cord Retainer Optional 23 Inserting the Retainer through the Lanced LoopAC power cord Latches Sleeve for thin power cords Slide the retainer through the first latch. See Figure26 Sleeve Around the Power Cord Installing the Cable Guard Optional Washer29 Attaching the Cable Guard to the Switch 31 Attaching the Cables to the Switch Installing SFP Modules After Installing the SwitchNumber-8 Phillips wood screws Desk or shelf Removing SFP Modules TX and which is receive RXInsert a dust plug into the optical ports of the SFP module Grasp the SFP module, and carefully remove it from the slotConnecting to the 10/100 and 10/100/1000 Ports Connecting Devices to the Ethernet PortsBale clasp Connecting to the PoE Ports Device Crossover CableWhere to Go Next OL-23803-02 Diagnosing Problems Switch Post ResultsSwitch LEDs Switch ConnectionsBad or Damaged Cable Ethernet and Fiber-Optic CablesInterface Settings 10/100 and 10/100/1000 Port Connections10/100 PoE or PoE+ Port Connections SFP ModuleSwitch Performance Spanning Tree LoopsSpeed, Duplex, and Autonegotiation Autonegotiation and Network Interface CardsResetting the Switch Finding the Switch Serial NumberSerial Number Location for the Catalyst 3560CPD-8PT-S Switch 330039 OL-23803-02 Technical Specifications Environmental RangesEnvironmental Ranges Physical Specifications Power Requirements Table A-2 Catalyst 3560-C and 2960-C Switch Specifications Switch Available PoEOL-23803-02 Connector Specifications 10/100 and 10/100/1000 PortsSFP Module Connectors Figure B-2 10/100/1000 Port PinoutsSFP Module Cables Cables and AdaptersCore Modal Wavelength Cable Pinouts TP3Console Port Adapter Pinouts Switch Console RJ-45-to-DB-9 Port DTEDevice TxD RxD Switch Console RJ-45-to-DB-25 Port DTE Adapter DeviceRxD TxD Accessing the CLI Through the Console Port RJ-45 Console PortFigure C-1 Connecting the Console Cable Figure C-2 Connecting the USB-Mini Console Cable USB Mini-Type B Console PortInstalling 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 Using the Add or Remove Programs UtilityIP Settings Entering the Initial Configuration InformationCompleting the Setup Program Enter an enable secret password, and press Return Enter an enable password, and press ReturnEnter a virtual terminal Telnet password, and press Return Switch or as a standalone switchThese choices appear OL-23803-02
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