3Com 2900 manual Maintenance and Troubleshooting, File Loading Failure, Password Loss

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6 Maintenance and Troubleshooting

File Loading Failure

If file loading fails, the system runs steadily using the original system files. In this case, check whether the physical ports are properly connected.

z

z

If not, reconnect them correctly and restart the loading procedure.

If so, view the loading procedure information displayed on the HyperTerminal to check for input errors. If there is any input error, restart the loading procedure with correct input.

Common input errors include:

z

z

z

Fail to set the baud rate of the HyperTerminal to 38,400 bps when loading files at a baud rate other than 9,600 bps through XMODEM.

Enter an incorrect IP address, software name, or path of the TFTP server when using TFTP. Enter an incorrect IP address, software name, username, or password when using FTP.

If file loading fails when there are neither physical connection problems nor input errors, please contact your sales agent for help.

Password Loss

User Password Loss

If you have forgotten the user password, you can enter the Boot ROM menu:

BOOT MENU

1.Download application file to flash

2.Select application file to boot

3.Display all files in flash

4.Delete file from flash

5.Modify BootRom password

6.Enter BootRom upgrade menu

7.Skip current system configuration

8.Set BootRom password recovery

9.Set switch startup mode

0. Reboot

Enter your choice(0-9):

Enter 7, and then restart the switch. After the switch is restarted, the user password is removed.

Boot ROM Password Loss

Please contact your sales agent.

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Contents 3Com Baseline Switch 2900 Family Environmental Statement About This Manual OrganizationConventions Related Documentation Obtaining DocumentationManual Description Table of Contents Page Product Overview IntroductionPage 3Com Baseline Switch 2920-SFP Plus Power Supply SystemFront Panel Rear Panel3Com Baseline Switch 2928-SFP Plus 3Com Baseline Switch 2952-SFP Plus 3Com Baseline Switch 2928-PWR Plus 3Com Baseline Switch 2928-HPWR Plus Specification PortsConsole Port 10/100/1000Base-T Ethernet PortTransceiver Central Connector Type 1000Base-X SFP InterfaceFiber Max Transmis Sion DistancePower LED LEDsRPS Status LED Port Mode LED Port Ethernet port status Switch model Mode Meaning10/100/1000Base-T Auto-Sensing Ethernet Port Status LED LED 1000Base-X SFP Interface Status LED Installation Preparations Safety PrecautionsInstallation Site Temperature/HumidityLaser Safety Electromagnetic SusceptibilityDust concentration limit in the equipment room Gas Maximum concentration mg/mInstallation Tools Installing a Switch Introduction to Mounting BracketsModel Mounting bracket Description Attaching the Mounting Brackets to a Switch Model Mounting position Description See -6 , FigureMounting the Switch to a Rack Page Mounting the Switch on a Workbench Connecting the Pgnd CableWhen a Grounding Strip is Available Page Where a Grounding Conductor Can be Buried Other Installation SitesWhen the switch is AC-powered Connecting the Power Cord Connecting an AC Power CordVerifying the Installation Connecting an RPS DC Power CordPage Initial Power-On Setting Up the Configuration EnvironmentConnecting the Console Cable RJ-45 Signal Direction DB-9Setting Terminal Parameters Connection Procedure4Set the serial port used by the HyperTerminal connection 6HyperTerminal window Booting the Switch Checking Before Power-OnPowering On the Switch Describes the fields above 2Description on the fields Changing the Boot Mode Enter 9. The system prompts you to change the startup modeEnter Y. The system displays the following information User interface aux0 is available Press Enter to get started Approaches for Loading Application and Configuration Files Loading Files Through the Boot ROM MenuLoading Software Introduction to the Boot ROM Menu Loading Files Using Xmodem Through Console Port Loading a Boot ROM fileIntroduction to Xmodem Task Remarks Change the rate of the serial port on the terminalDescription Page 2Properties dialog box 5Transfer menu Restoring the download rate to the default Page Loading Files Using Tftp Through Ethernet Port Introductin to TftpLoad File Name Loading an application file Loading Files Using FTP Through Ethernet Port Introduction to FTPParameters are described in Table 5Description of the FTP parameters Loading an application file Maintenance and Troubleshooting Password LossUser Password Loss Boot ROM Password LossPower Supply Failure With AC power inputWith RPS power input With both AC and RPS power suppliesConfiguration Terminal Failure Troubleshooting when there is no terminal displayTroubleshooting when the terminal display is illegible