3Com 5000 manual Troubleshooting, Power System, Console, Terminal

Page 51

Troubleshooting the Power System 51

4 Troubleshooting

Troubleshooting	Fault: POWER LED is OFF or blinking.
the Power System	Troubleshooting: Check:
	Troubleshooting: Check:
	■ Whether the power switch of the router is turned on.
	■ Whether the power supply switch is turned on.
	■ Whether the power cord of the router is properly connected.
	■ Whether the power supply matches the requirement of the router.
	CAUTION: Do not hot swap the power cord. After having checked the
	items above, if the POWER LED is still OFF, please contact the agent.

Troubleshooting of	After the Power-On Self-Test (POST) of the router, if the system operates
the Console	normally, the start-up information should be displayed on the console
Terminal	terminal. If the configuration system has some faults, the terminal may
	not display anything or may display only illegible characters.
	Troubleshooting of “nothing being displayed on the terminal”
	Fault: After the POST of the router, the terminal does not display any
	information.

Troubleshooting: Check:

■Whether the power system is normal.

■Whether the console cable is connected correctly.

If no problems are found after performing the above checks, it is likely to be the problem of the console cable or the terminal (e.g., the HyperTerminal) parameters. Please check the cable or the parameters.

Image 51

Contents 3Com Router 5000 Family 3Com Corporation Campus Drive Marlborough Page Page Contents Register Your Product to Gain Service Benefits Introduction Software Maintenance under v 3.11 EnvironmentContents Contents About This Guide Conventions RelatedDocumentation Pddtechpubscomments@3com.com CommentsAbout This Guide Router AboutEthernet access solution By extending SICs and MIMs, 3C13701 3Com RouterRouter 5012 Indicators System DescriptionSystem description of 3Com Router SLOT1~3 READY/ACTIVE 3C13751Ready LEDs of 3Com 5232 RouterNvram Router 5642 Indicators 3C137553Com Router 5642 Front view of 3Com Router Router 5642 Indicators 3Com Router 5682 Front view of 3Com Router 3C13759Router 5682 Indicators Introducing the Router 5000 Family Standard rack, as shown in Figure Installing the Router on a WorkbenchInstalling Router in a RackPgnd Wire Power Cords Grounds and CablesAC Power Cord AC power supply Power CordAC Power Connector Recommended power outletConsole Terminal Introduction to console port Console cableAttributes of the console port Attributes of the Ethernet interface Router to LAN ConnectionIntroduction to the Ethernet interface Ethernet cableAUX cable Router to WANConnection Introduction to the AUX portAttributes of the synchronous/asynchronous serial interface WAN Interface toTransmission rate and distance of V.24 RS232/V.35 cable Attributes of the synchronous/asynchronous serial interfaceDTE and DCE DTE cable assembly 24 RS232 DCE cable assembly35 DCE cable assembly 35 DTE cable assembly21 DTE cable assembly V24 DTE cable assembly 35 DCE cable assembly E1 interface attributes E1 interface to DSU/CSU75Ω unbalanced coax cable 120Ω balanced twisted pair cableE1 120Ω balanced twisted pair cable T1interface attributes T1 interface to DSU/CSUStartup Router Setting up Configuration EnvironmentConnecting the router to a console terminal Setting the parameters for console terminalSetting the connection port in the local configuration Powering on the router Checking before power-onChecking/operating after power-on Press Enter and the screen will display Interface ConfigurationCharacteristics of the command line interface Fundamentals RouterCommand line interface Starting and Configuring the Router Console TroubleshootingPower System Troubleshooting of nothing being displayed on the terminalSdram Troubleshooting of repeated rebootApplication Software UpgradeTroubleshooting Application image file main software Configuration fileIntroduction Router manages three types of filesEnvironment Maintenance underBoot Menu SoftwareDefault names and types of the boot files =MAIN B=BACKUP S=SECURE Flag set successfully Upgrading the application image Upgrading Software through XmodemDownload completed Upgrading the entire Boot ROM image Upgrading the application image through Ethernet Router Software Maintenance Software Maintenance under v 3.11 Environment Loss Router PasswordPassword loss. They can help you to set a new password Dealing with aProduct to Gain Service BenefitsSolve Problems Online Register YourPurchase Extended WarrantyServices Access SoftwareContact Us Telephone TechnicalSupport and Repair Country Telephone Number US and Canada Telephone Technical Support and Repair Appendix a Obtaining Support for Your 3COM Products

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