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3Com RMON-EMP-3 installation and operation guide Troubleshooting 4

Models: RMON-EMP-3

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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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3Com RMON-EMP-3 installation and operation guide Troubleshooting 4

Contents

Software Version 3Com Corporation 118 Turnpike Road Southborough, MA ONline Ethernet RMON MultiProbe Module Installation and OperationGuide Document Number Printed March Model Number RMON-EMP-3VDE Class B Compliance ii Ethernet RMON MultiProbe Module Installation and Operation GuideFederal Communications Commission Notice Canadian Emissions RequirementsRestricted Rights Ethernet RMON MultiProbe Module Installation and Operation Guideiv Ethernet RMON MultiProbe Module Installation and Operation Guide Chapter 1 - Introduction ContentsHow to Use This Guide Chapter 2 - Installing the Modulevi Ethernet RMON MultiProbe Module Installation and Operation Guide Chapter 3 - Configuring the ModuleIndex Chapter 4 - TroubleshootingAppendix A - Specifications Appendix B - Technical Supportviii Ethernet RMON MultiProbe Module Installation and Operation Guide Figures x Ethernet RMON MultiProbe Module Installation and Operation Guide Tables xii Ethernet RMON MultiProbe Module Installation and Operation Guide Audience How to Use This GuideStructure of This Guide Example Document ConventionsConvention Indicatesxvi Ethernet RMON MultiProbe Module Installation and Operation Guide Related Documents3Com Documents The following documents supply related background information Reference Documents1 Introduction RMON Overview RMON ArchitectureRMON Probe RMON Client Ethernet RMON GroupsHostTopN Group - Sorts stations by top traffic contributors. You can use this information to identify the most active hosts on a segment or the hosts producing the most errors RMON MultiProbe Module Overview RMON MultiProbe Module Features Other benefits of the RMON MultiProbe Module include Theory of Operation Figure 1-1. RMON Sample Application Sample ApplicationPage Installing the Module 2 2 Installing the ModulePrecautionary Procedures Table 2-1. Quick Installation Steps Quick InstallationUnpacking Procedures Installing the RMON MultiProbe Module RMON MultiProbe Module Figure 2-1. RMON MultiProbe Module in the ONline System ConcentratorConnecting a Terminal Initializing the RMON MultiProbe Module Figure 2-2. Main Configuration Menu Monitoring the Front Panel Figure 2-3. RMON MultiProbe Module Front Panel LEDs and Reset Button Table 2-2. Module LED Interpretations State Table 2-2. Module LED Interpretations ContinuedLED Name ColorPage Configuring the Module 3 3 Configuring the ModuleConfiguration Menu Overview Main Menu Figure 3-1. Configuration Menu Flow ChartFigure 3-1. Configuration Menu Flow Chart Continued Modifying Configuration Menu Values Using the Main Configuration Menu Figure 3-2. Main Configuration Menu Table 3-1. Main Configuration Menu Description OptionResult Figure 3-3. Download Menu Using the Download MenuTable 3-2. Download Menu Description enables you to enter a new value. The filename canDisplays the TFTP server IP address and enables you reset, the module reverts to the software containedFigure 3-4. Modify/View Configuration Values Menu Using the Modify/View Configuration Values MenuFor a description of this menu, refer to the section Table 3-3. Modify/View Configuration Values Menu DescriptionDisplays the time zone and enables you to enter a description of this menu, refer to the section UsingUsing the Modify/View Serial Configuration Values Menu Table 3-3. Modify/View Configuration Values MenuDescription Continued Figure 3-5. Modify/View Serial Configuration Values Menu Table 3-4. Modify/View Serial Configuration Values Menu Description enables you to enter a new value. Valid valuesSerial Port IP Address Table 3-4. Modify/View Serial Configuration Values Displays the modem hangup string and enablesMenu Description Continued Table 3-5. Modem Init Strings and Hangup Strings Modem Init Strings and Hangup StringsTable 3-5. Modem Init Strings and Hangup Strings Continued Table 3-6. Connect Response String Example Modem Response StringsUsing the Modify/View Network Settings Menu Figure 3-6. Modify/View Network Settings Menu Figure 3-6 is an example of the Modify/View Network Settings menuTable 3-7. Modify/View Network Settings Menu Description Table 3-7. Modify/View Network Settings Menu Description Continued Using the Modify/View Network Interface Settings MenusFigure 3-7. Modify/View Network Interface 1 Settings Menu Table 3-8. Modify/View Network Interface Settings Menu Description Displays the interface IP addressand enables you toDisplays the interface subnet mask and enables you Assigning the Interface IP Address and Subnet Mask Configuring the Module and InterfacesThis configuration sets up one interface for each bridged segment Assigning the Module Default Gateway Using BOOTP to Configure the Module and Interfaces BOOTP DescriptionBOOTP Configuration Process BOOTP Requirements Using BOOTPSample BOOTPtab file # /etc/bootptab database for bootp server /etc/bootpd Assigning Interfaces to Networks Figure 3-8. DIP Switch Location Using the DIP Switch to Assign NetworksNetwork Selection Table 3-9. Network Selection DIP Switch SettingsSwitch SettingUsing Management Commands to Assign Interfaces to Networks Management Command Examples Showing Module and Interface Configurations Show Module CommandSaving Network Assignments Show Port Command Configuring the Module 3 Re-initializing the RMON MultiProbe Module Warm-Starting the RMON MultiProbe Module Information PreservedInformation Lost Cold-Starting the RMON MultiProbe Module Information Lost Information PreservedPage Troubleshooting 4 4 TroubleshootingTable 4-1. Diagnostic Tests and Interface Status LEDs Troubleshooting Startup ProblemsTable 4-2. Troubleshooting Malfunctions Troubleshooting MalfunctionsTable 4-2. Troubleshooting Malfunctions Continued Corrective Action Table 4-2. Troubleshooting Malfunctions ContinuedSymptom Possible CauseTable 4-2. Troubleshooting Malfunctions Continued Corrective Action Table 4-2. Troubleshooting Malfunctions ContinuedSymptom Possible CauseTroubleshooting Network Connectivity Problems Technical Assistance Page Connectors and Cables Memory Configuration Allocation A SpecificationsElectrical Specifications Environmental Specifications Mechanical Specifications General SpecificationsOperating Temperature Electrical SpecificationsEnvironmental Specifications Power RequirementsGeneral Specifications Mechanical SpecificationsConnectors and Cables RS-232 25-Pin Port Connector Pinouts Connector PinoutsTable A-1. RMON MultiProbe Module RS-232 25-Pin Port RS-232 Crossover Cable for a PC or Terminal Sample Out-of-Band Connections Modem Cable PinoutsEthernet Null-Modem Cable Direct SLIP Connection ONline System Modem ModemONline System Concentrator Straight-Through CableUsing the RMON MultiProbe Module SLIP Address Table A-2. RS-232 Straight-Through Cable Pinouts RS-232 Straight-Through CableFigure A-3. RS-232 Straight-Through Cable Pinouts RS-232 Null-Modem CableTable A-3. Maximum Number of Entries for Ethernet Tables Memory Configuration AllocationOn-line Technical Support B 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 Numerics Index2 Index Page 4 Index VDE compliance Warm start configuration information