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

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Table 4-2. Troubleshooting Malfunctions (Continued)

Symptom

Possible Cause

Corrective Action

 

 

 

Attached terminal

The terminal is

Follow the

does not operate

malfunctioning.

troubleshooting

 

 

proceduresrecommended

 

 

by the terminal

 

 

manufacturer.

 

 

 

 

Cables are

Make sure that the cable

 

unattached.

connections at both ends

 

 

are secure.

 

 

 

 

Cables are not the

Make sure that the cable

 

correct type.

attached to the terminal

 

 

conforms to the

 

 

specification as described

 

 

in Appendix A,

 

 

Specifications, the

 

 

section titled Connectors

 

 

and Cables.

 

 

 

 

The terminal is

Check the console port

 

configured

configuration. Verify that

 

incorrectly.

the terminal is

 

 

configured as 8-bit data,

 

 

no parity, 1 stop bit, and

 

 

9600 baud rate.

 

 

 

Troubleshooting 4 - 5

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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 Convention Indicates Example Document ConventionsUsr/snm/agents Related Documents 3Com Documents Reference Documents Introduction Rmon Architecture Rmon OverviewRmon 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 Steps Quick InstallationStep 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 Modem Init Strings and Hangup Strings Command ResultModem Init Strings and Hangup Strings Waits for the reply string that follows which is Connect Response String Example Modem Response StringsResponse 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 Bootp Description Using Bootp to Configure the Module and InterfacesBootp Configuration Process Using Bootp Bootp RequirementsSample 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 ExamplesShow Module Command Showing Module and Interface ConfigurationsSaving 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 Diagnostic Tests and Interface Status LEDs Troubleshooting Startup ProblemsDiagnostic 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 Table A-2. RS-232 Straight-Through Cable Pinouts RS-232 Straight-Through CableModem MultiProbe Module Figure A-3. RS-232 Straight-Through Cable Pinouts RS-232 Null-Modem CableTable A-3. Maximum Number of Entries for Ethernet Tables Memory Configuration AllocationEthernet Table Maximum Number of Entries On-line Technical Support Technical SupportEmail Technical Support Support from Your Network SupplierWorld 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