3Com RMON-EMP-3 installation and operation guide Troubleshooting

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4 Troubleshooting

This chapter provides hardware troubleshooting information which you can use if the RMON MultiProbe Module fails to operate correctly. If after reviewing the information in this chapter you cannot correct the problem, contact your 3Com representative for further assistance.

This chapter contains the following sections:

❑Troubleshooting Startup Problems

❑Troubleshooting Malfunctions

❑Troubleshooting Network Connectivity Problems

❑Technical Assistance

Troubleshooting 4 - 1

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Contents Page VDE Class B Compliance Restricted Rights Page Contents Configuring the Module Troubleshooting Page Figures Page Tables Page Audience How to Use This GuideStructure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents Related Documents 3Com Documents Reference Documents Introduction Rmon Overview Rmon ArchitectureRmon Probe Rmon Client Ethernet Rmon GroupsPage Rmon MultiProbe Module Overview Rmon MultiProbe Module Features Other benefits of the Rmon MultiProbe Module include Theory of Operation Rmon Sample Application Sample ApplicationPage Installing the Module Precautionary Procedures Quick Installation Quick Installation StepsStep Procedure Chapter/Section Unpacking Procedures Installing the Rmon MultiProbe Module Rmon MultiProbe Module ONline System Concentrator Connecting a Terminal Initializing the Rmon MultiProbe Module Main Configuration Menu Monitoring the Front Panel Rmon MultiProbe Module Front Panel LEDs and Reset Button LED Name Color State Indicates Module LED InterpretationsModule LED Interpretations Page Configuring the Module Configuration Menu Overview Configuration Menu Flow Chart Configuration Menu Flow Chart Modifying Configuration Menu Values Using the Main Configuration Menu Main Configuration Menu Option Result Main Configuration Menu DescriptionDownload Menu Using the Download MenuDownload Menu Description Modify/View Configuration Values Menu Using the Modify/View Configuration Values MenuModify/View Configuration Values Menu Description Using the Modify/View Serial Configuration Values Menu Modify/View Serial Configuration Values Menu Modify/View Serial Configuration Values Menu Description Display the modem init string and enables you Command Result Modem Init Strings and Hangup StringsModem Init Strings and Hangup Strings Waits for the reply string that follows which is Modem Response Strings Connect Response String ExampleResponse code Bps rate No Carrier /BUSY/NO DIALTONE/NO ANSWER/ERROR Using the Modify/View Network Settings MenuModify/View Network Settings Menu Modify/View Network Settings Menu Description Using the Modify/View Network Interface Settings Menus Modify/View Network Interface 1 Settings Menu Modify/View Network Interface Settings Menu Description Assigning the Interface IP Address and Subnet Mask Configuring the Module and InterfacesConfiguring the Module 3 Assigning the Module Default Gateway Using Bootp to Configure the Module and Interfaces Bootp DescriptionBootp Configuration Process Bootp Requirements Using BootpSample BOOTPtab file Configuring the Module 3 Assigning Interfaces to Networks DIP Switch Location Using the DIP Switch to Assign NetworksSwitch Network Selection Setting Network Selection DIP Switch SettingsUsing Management Commands to Assign Interfaces to Networks SET Port 7.1 Network ETHERNET1 Management Command ExamplesShowing Module and Interface Configurations Show Module CommandSaving Network Assignments Show Port Command Backplane Re-initializing the Rmon MultiProbe Module Information Preserved Information Lost Warm-Starting the Rmon MultiProbe ModuleCold-Starting the Rmon MultiProbe Module Information Preserved Information Lost Page Troubleshooting Troubleshooting Startup Problems Diagnostic Tests and Interface Status LEDsDiagnostic Interface Troubleshooting Malfunctions Troubleshooting MalfunctionsSymptom Possible Cause Corrective Action Troubleshooting Malfunctions Troubleshooting Malfunctions If the LEDs Nvram Troubleshooting Network Connectivity Problems Technical Assistance Page Specifications Environmental Specifications Electrical SpecificationsGeneral Specifications Mechanical SpecificationsInterface Configuration Connectors and CablesPin RS-232 25-Pin Port Connector PinoutsRS-232 Crossover Cable for a PC or Terminal Sample Out-of-Band Connections Modem Cable PinoutsPage Using the Rmon MultiProbe Module Slip Address RS-232 Straight-Through Cable Table A-2. RS-232 Straight-Through Cable PinoutsModem MultiProbe Module Figure A-3. RS-232 Straight-Through Cable Pinouts RS-232 Null-Modem CableMemory Configuration Allocation Table A-3. Maximum Number of Entries for Ethernet TablesEthernet Table Maximum Number of Entries On-line Technical Support Technical SupportSupport from Your Network Supplier Email Technical SupportWorld Wide Web Site Support from 3Com Returning Products for Repair Accessing the 3Com MIB3Com Technical Publications Page Index LEDs, 2-11 monitoring, 2-10 reset button ONcore Distributed Management Module Pinouts, A-5 speed, 3-15 Serial Port Mode VDE compliance Warm start Configuration information