3Com 5104M-FL1 installation and operation guide Enabling Remote Failure Signaling

Page 71

Enabling Remote Failure Signaling

Due to the nature of the 10BASE-FL standard, the receive path of a redundant port can detect no light and partition errors, but the transmit path cannot detect these errors. Remote Failure Signaling (RFS) provides a way for transmit failures to be detected so that a switchover from a primary to a backup port can occur. You can enable RFS for any of the four ports on your module. When you connect two 10BASE-FL Modules and enable redundancy between two ports on one of the modules, you must enable RFS on the corresponding ports of the other module.

For example, if you enable redundancy between ports 1 and 2 on 10BASE-FL Module #1 and these ports are connected to ports 1 and 2 on Module #2, you must enable RFS on ports 1 and 2 on 10BASE-FL Module #2 (Figure 3-4). Note that RFS is automatically disabled when you disable redundancy on the corresponding port or disable the port.

.

Figure 3-4. 10BASE-FL Modules Connected with Redundancy/RFS Enabled

Installing and Operating the Module 3 - 15

Image 71

Contents Page Vcci Class 1 Compliance Page Page Contents Installing and Operating the Module Appendix a Specifications Page Figures Page Tables Page Audience How to Use This GuideStructure of This Guide Text Convention Example Document ConventionsText Conventions 3Com Documents Related DocumentsReference Documents Page Introduction 10BASE-FL Module Description 10BASE-F Standard Description 10BASE-FL and Foirl Ieee Standards ComparisonTheory of Operation BASE-F StandardsBASE-FL Module Connections Designing and ExpandingtheNetwork Rule Definition Recommendations/Notes Understanding the General RulesBasic Network Rules Seven Basic Network RulesAs equivalent distance. Every Assume that one LAN Product Equivalent LAN EquivalenceLAN Product Equivalent Distances Calculating Maximum Link Distance Determining Maximum 10BASE-FL Link DistancesDetermining Link Budget ONline to BASE-FL Module Optical Power BudgetCable Size Transmit Receive Optical Link Loss Power DBmSplicing Splice Type Range of Loss dB Typical Loss dB Connector and Splice Insertion LossConnector Type Range of Loss Per Typical Loss dB Pair dB Typical Fiber Loss CharacteristicsMeter Fiber Link With Mechanical Splice Example Fiber Link With Mechanical SpliceMeter Fiber Link Through Two Patch Panels Example Fiber Link Through Patch PanelsChoosing a Network Backbone Cabling Structure Star ConfigurationStar-Wiring Configuration Serial ConfigurationSerial Configuration Using 10BASE-FL Modules 10BASE-FL Module Configurations10BASE-FL Backbone, 10BASE-FL to-the-Desk All-10BASE-FL Network with 3 Concentrators Example a Network with 6 Concentrators Example a Network with 3 ConcentratorsNetwork with 6 Concentrators Path 10BASE-FL Backbone, Unshielded Twisted Pair to-the-DeskFiber Equivalent Distances Between Transceivers Total Fiber Number EquivalentExample Sample Configuration Distance Calculation Sample Configuration Distance Calculation 10BASE-FB Fiber Backbone, 10BASE-FL to-the-Desk Example Fiber Backbone, 10BASE-FL to-the-Desk Sample Fiber Backbone, 10BASE-FL to-the-Desk ConfigurationConnecting External Network Devices Ieee Example Connecting a Thin Ethernet 10BASE2 SegmentDesigning and Expanding the Network 2 Standard Redundant Configuration In this configuration Fault-Tolerant ConfigurationsConfiguring Ports for Fault Tolerance Setting Redundancy Implementing Backbone Cable Plant Fault Tolerance10. Redundant Fiber Backbone Configuration Remote Failure Signaling 11. Total Backbone Fault-Tolerant Configuration Implementing Total Backbone Fault Tolerance12. Network With 3 Concentrators ONline Ethernet 10BASE-FL Installation and Operation Guide Installing and Operating the Module Unpacking Procedures Precautionary ProceduresStep Procedure Section Title Quick InstallationQuick Installation Procedures Setting the Dip Switches BASE-FL Module Dip Switch Locations Setting Dip Switch SW1Function Off Default Dip Switch SW1 SettingsFactory Switch Setting Switch Function Factory Default Setting Dip Switch SW2Dip Switch SW2 Settings for Switches 1 to Channel Selection Installing the ModuleDip Switch SW2 Settings for Switches 5 Switch SettingsInstalling the 10BASE-FL Module BASE-FL Module Connection Configuring the Module Enabling Ports Enabling Port Redundancy Selecting a NetworkSET Port slot.port Mode Redundant slot.port BASE-FL Modules Connected with Redundancy/RFS Enabled Enabling Remote Failure SignalingSaving Module Configuration Showing Module ConfigurationMonitoring the Front Panel Shows the location of these indicatorsBASE-FL Module Faceplate and ONline System Concentrator LED Name Color State Indicates Interpreting the 10BASE-FL Module LEDsNetwork Check Codes LED State Module Is Configured forVerifying the LED and Network Assignments Troubleshooting Possible Cause Corrective Action State Troubleshooting Using the Port Activity LEDsTroubleshooting Using the Port Activity LEDs LED NameLED State Indication Possible Cause Corrective Action Troubleshooting Using the Port Status LEDsTroubleshooting Using the Port Status LEDs Replace remote device Technical Assistance RFS TroubleshootingONline Ethernet 10BASE-FL Installation and Operation Guide Specifications Table A-1. General Specifications General SpecificationsTable A-2. Transmit Power Peak Values Optical SpecificationsTransmitter Specifications Supported Fiber Optic Cables Receiver SpecificationsTable A-3. Receiver Specifications Fiber Optic Interface Power RequirementsTable A-4. Fiber Optic Interface Specifications Table A-5. Power RequirementsTable A-7. Mechanical Specifications Environmental SpecificationsMechanical Specifications Table A-6. Electrical SpecificationsFiber Cables and Connectors 10BASE-FL Cable and Connector SpecificationsConnector Type Part Number Table A-8. Connector Type Part NumberOn-line Technical Support Technical SupportWorld Wide Web Site Support from Your Network SupplierEmail Technical Support Support from 3Com Returning Products for Repair Accessing the 3Com MIB3Com Technical Publications Page Index Index RFS VDE compliance Verify LED Operation, 3-19Network Assignment