Troubleshooting Using the Port Status LEDs | 3Com 5102M-FBP instruction

Troubleshooting Using the Port Status LEDs

A blinking Port Status indicator is always a sign that the port detects a potential problem. Once a port detects a problem, you can further analyze the problem by counting the number of blinks. Table 4-2 provides troubleshooting suggestions for each of the blinking sequences.

Table 4-2. Troubleshooting Using the Port Status LEDs

LED State	Indication		Possible Cause	Corrective Action

Off	Port Disabled		Port disabled.	Enable port.

			10BASE-FB	Check concentrator
			Module not	power status.
			powered up.	Reinsert the
				Reinsert the
				10BASE-FB Module.

			Broken LED.	Press the LED check
				button on Controller
				Module.

			Bad 10BASE-FB	Replace module.
			Module.

Troubleshooting 4 - 3

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3Com 5102M-FBP, 510M-FBP Troubleshooting Using the Port Status LEDs, LED State Indication Possible Cause Corrective Action

Contents

Page VDE Class B Compliance Restricted Rights Page Contents Installing and Operating the Module Appendix a Specifications Page Figures Page Tables Page Audience How to Use This Guide Structure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents 3Com Documents Related Documents Reference Documents Slot ONline System Concentrator Installation and OperationPage Introduction 10BASE-FB Module Descriptions Introduction 1 Theory of Operation 10BASE-FB Compliance BASE-FB Module Connections Compatibility With Other Ethernet Fiber Products BASE-FB Module Compatibility3Com Product Part Number Designing and Expanding the Network Understanding the General Rules Rules for Configuring a NetworkBasic Network Rules Rule Definition Recommendations/Notes Definition Recommendations/Notes Is actually equal to 1.1 meters Equivalent Fiber Distances Equivalent Fiber Distances of LAN ProductsLAN Product Equivalent Fiber Determining Maximum Fiber Link Distances Determining Link Budget Calculating Maximum Link Distance Power ONline 10BASE-FB Module Optical Power Budget Normal PowerLink Link Loss DBm BASE-FB Optical Power Budget ONline 10BASE-FB Module Optical Power Budget High PowerCable Size Used Transmit Receive Optical Power Micron ONline to Attenuation Typical Fiber Loss Characteristics Connector and Splice Insertion Loss Meter Fiber Link With Mechanical Splice Example 1700 Meter Fiber Link With Mechanical Splice Meter Fiber Link Through Two Patch Panels Example 2000 Meter Fiber Link Through Two Patch Panels Choosing a Network Backbone Cabling Structure Star-Wiring Configuration Star Configuration Serial Configuration Using 10BASE-FB Modules Serial Configuration Fiber Backbone, Fiber-to-the-Desk 10BASE-FB Module Configurations All-Fiber Network Network With 3 Concentrators Example Network With 3 Concentrators Example Network with 8 Concentrators Network Configured With 8 Concentrators Fiber Equivalent Distances Between Transceivers Fiber Backbone, Unshielded Twisted Pair to-the-Desk Example Sample Configuration Distance Calculation Sample Configuration Distance Calculation Fiber Backbone, Coaxial Connection Example Connecting a Thin Ethernet 10BASE2 Segment Designing and Expanding the Network 2 Fault-Tolerant Configurations Configuring Ports for Fault ToleranceStandard Redundant Configuration In this configuration Setting Redundancy 10. Redundant Fiber Backbone Configuration Implementing Total Backbone Fault Tolerance 11. Total Backbone Fault-Tolerant Configuration 12. Fiber Network With 3 Concentrators Page Installing and Operating the Module Precautionary Procedures Unpacking Procedures Quick Installation Quick Installation ProceduresStep Procedure Section Title Setting the Dip Switches BASE-FB Module Dip Switch Locations Setting Dip Switch S1 Dip Switch S1 Settings for Switches 1Switch Label Function Factory Switch Setting Default Off Port-Switching Module Port Dip Switch S1 Settings for Switches 3 toModule-Switching Module Channel Selection Setting Dip Switch S2 Dip Switch S2 SettingsSwitch Label Function Factory Switch Setting Default Enable/disable Disable Module Low Light Detection Not Used Installing the Module Installing the 10BASE-FB Module BASE-FB Module Connection Configuring the Module Enabling Ports Selecting a Network Enabling Port Redundancy You can enable port redundancy in one of the following ways Enabling Low Light Warning Enabling Optical Power Saving Module Configuration Showing Module Configuration Monitoring the Front Panel Page LED Name Color State Indicates Interpreting the 10BASE-FB Module LEDs LED State Network Configuration Verifying LED and Network AssignmentsNetwork Check Codes Troubleshooting Troubleshooting Using the Port Activity LEDs Troubleshooting Using the Port Activity LEDsPossible Cause Corrective Action Troubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDsLED State Indication Possible Cause Corrective Action Troubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDs 10BASE-FL Technical Assistance Page Specifications Table A-1. General Specifications General Specifications Transmitter Specifications Optical SpecificationsTable A-2. Transmit Power Cable Type Normal Power High Power Receiver Specifications Table A-3. Receiver SpecificationsSupported Fiber Optic Cables Table A-4. Fiber Optic Interface Specifications Power RequirementsTable A-5. Power Requirements Fiber Optic Interface Mechanical Specifications Environmental SpecificationsTable A-6. Electrical Specifications Table A-7. Mechanical Specifications 10BASE-FB Cables 10BASE-FB Cable and Connector Specifications 10BASE-FB Connectors Port-Switching Connector TypeTable A-8 BASE-FB Module Part Numbers On-line Technical Support Technical Support Support from Your Network Supplier Email Technical SupportWorld Wide Web Site Support from 3Com Returning Products for Repair Accessing the 3Com MIB 3Com Technical Publications Page Index Installing Link Budget Redundant Link, 3-16Redundancy LED Unpacking Procedures, 3-3Unshielded Twisted Pair Cable