3Com 2900 manual Loading Files Using Xmodem Through Console Port, Introduction to Xmodem

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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):

The items in the Boot ROM menu are described in Table 4-2

z

z

Currently, Boot ROM files are not provided separately by the 3Com Baseline Switch 2900 Family; instead, they are stored together with application files in the files with the name extension of .bin. The procedures for loading Boot ROM files and application files are similar except that you need to select different items (1 for loading application files, and 6 for loading Boot ROM files) in the Boot ROM menu. This manual takes the loading of Boot ROM files as examples.

Loading Files Using XMODEM Through Console Port

Introduction to XMODEM

XMODEM is a file transfer protocol widely used for its simplicity. XMODEM transfers files through the console port, supporting data packets of 128 bytes. With respect to reliability, it supports checksum, CRC, and the error packet retransmission mechanism. Normally, the maximum number of retransmission attempts is ten.

XMODEM transfer is completed by receiving and sending programs together. Receiving program initiates packet checking method negotiation by sending the negotiation character. If negotiation passes, the sending program starts packet transfer. Upon receipt of a complete packet, the receiving program checks it using the agreed-upon check method. If the check succeeds, the receiving program sends an acknowledgement character; if the check fails, it sends a reject character. Upon receipt of the acknowledgement, the sending program continues to send the next packet; upon receipt of the reject, it retransmits the packet.

Loading a Boot ROM file

Complete the following tasks to load a Boot ROM file using XMODEM through the console port (For details about the HyperTerminal, refer to “Setting Terminal Parameters” on page 4-2):

 

Task

Remarks

 

Enter the Boot ROM update menu on the switch

Required

 

Enter the protocol parameter setting menu

Log in to the switch through the HyperTerminal

 

 

and then configure the protocol used for loading

 

Configure the switch to download files using

 

files.

 

XMODEM

 

 

 

 

 

5-3

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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 Introduction Product OverviewPage Power Supply System 3Com Baseline Switch 2920-SFP PlusFront 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 Ports SpecificationConsole Port 10/100/1000Base-T Ethernet Port1000Base-X SFP Interface Transceiver Central Connector TypeFiber 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 Safety Precautions Installation PreparationsInstallation Site Temperature/HumidityElectromagnetic Susceptibility Laser SafetyDust 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 See -6 , Figure Model Mounting position DescriptionMounting 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 an AC Power Cord Connecting the Power CordConnecting an RPS DC Power Cord Verifying the InstallationPage Setting Up the Configuration Environment Initial Power-OnConnecting the Console Cable RJ-45 Signal Direction DB-9Connection Procedure Setting Terminal Parameters4Set 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 Enter 9. The system prompts you to change the startup mode Changing the Boot 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 Change the rate of the serial port on the terminal Task RemarksDescription Page 2Properties dialog box 5Transfer menu Restoring the download rate to the default Page Introductin to Tftp Loading Files Using Tftp Through Ethernet PortLoad File Name Loading an application file Introduction to FTP Loading Files Using FTP Through Ethernet PortParameters are described in Table 5Description of the FTP parameters Loading an application file Password Loss Maintenance and TroubleshootingUser Password Loss Boot ROM Password LossWith AC power input Power Supply FailureWith 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
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