Cisco Systems OL-6157-01 manual System LED is amber

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Chapter 3 Troubleshooting

Diagnosing Common Problems

Table 3-3 Corrupted Software Problems and Their Solutions

Symptom	Possible Cause	Resolution

System LED is amber,	Corrupted software.	Attach a monitor to the serial port to display
and all port LEDs are		the switch boot loader.
off.
		For more information, see the switch
		software configuration guide.

System LED is amber.	Nonfatal or fatal POST	Use the show post privileged EXEC
	error detected.	command to see which POST test failed.
		POST failures are usually fatal. Contact
		your Cisco representative if your switch
		does not pass POST.

Catalyst 2940 Switch Hardware Installation Guide

	OL-6157-01	3-5

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Contents Corporate Headquarters Catalyst 2940 Switch Hardware Installation GuideCatalyst 2940 Switch Hardware Installation Guide N T E N T S Installation Accessing the CLI Through the Console Port D-2 Contents Catalyst 2940 Hardware Installation Guide Conventions AudiencePurpose Warnung Wichtige Sicherheitshinweise Bewaar Deze InstructiesAviso Instruções Importantes DE Segurança Avvertenza Importanti Istruzioni Sulla SicurezzaOL-6157-01 GEM Disse Anvisninger Xii Related Publications Cisco.com Obtaining DocumentationDocumentation CD-ROM Ordering DocumentationCisco TAC Website Opening a TAC Case Obtaining Technical AssistanceDocumentation Feedback TAC Case Priority Definitions Obtaining Additional Publications and InformationXvii Xviii Features Setting up the Switch10/100 Ethernet ports 100BASE-FX port SFP module slot Front-Panel Description10/100 Ports Port Numbering10/100/1000 Port Port or Slot type Catalyst 2940-8TT-S Catalyst 2940-8TF-SType Cisco Part Number 100BASE-FX PortSFP Module Slot 62.5/125 micron 50/125 micron Micron Single-mode SFP ModulesMicron LEDs Cable GuardColor System Status Mode LED Port Mode DescriptionPort Mode Color Meaning Rear-Panel Description Power ConnectorSecurity Slots Console PortManagement Options OL-6157-01 Preparing for Installation InstallationChapter Verifying Package Contents Installation GuidelinesVerifying Switch Operation Installing the Switch on a Desk With Mounting Screws Installing the SwitchInstalling the Switch on a Desk Without Mounting Screws Installing the Mounting Screws on Top of a Desk Mounting the Switch on Top of a Desk Installing the Switch Under a DeskInstalling the Mounting Screws Under a Desk Mounting the Switch Under a Desk Installing the Switch on a WallThis Side Switch Screw Slides on this way Installing the Switch Magnet Mount Connecting to an SFP ModuleConnecting to an SFP Module Port Connecting to a 10/100 Port Connecting to 10/100 Ports and the 10/100/1000 Port10 Connecting to a 100BASE-FX Port Connecting to the 100BASE-FX Port11 Connecting to an SFP Module Port Where to Go Next Chapter Understanding Post Results Diagnosing Common ProblemsB-5 through Symptom Possible Cause ResolutionNo connectivity to SFP Poor performance or excessive System LED is amber OL-6157-01 Environmental Ranges Power RequirementsPhysical Dimensions SFP module Fiber-Port Power Levels 100BASE-FX port Slot1Safety Table A-3 Catalyst 2940 Switch Agency Approvals OL-6157-01 Connector Specifications Connectors and CablesFigure B-2 10/100 RJ-45 Pinouts 10/100/1000 Ports Connecting to 10BASE-T and 100BASE-TX DevicesFigure B-4 MT-RJ Connector Two Twisted-Pair Cable Pinouts Cable and Adapter SpecificationsTD+ Four Twisted-Pair Cable Pinouts for 10/100 PortsTPO Four Twisted-Pair Cable Pinouts for 1000BASE-T PortsCable and Adapter Pinouts Connecting to a PCIdentifying a Rollover Cable OL-6157-01 Methods for Accessing the CLI Configuring the Switch with the CLI-Based Setup ProgramTaking Out What You Need Accessing the CLI Through the Console PortConnecting to the Console Port Connecting to a Power SourceStarting the Terminal Emulation Software Figure C-3 Connecting a Switch to a PCIP Settings Entering the Initial Configuration InformationCompleting the Setup Program These choices appear CLI Numerics IN-2 IN-3 IN-4 IN-5 IN-6