3Com 4210G manual Press Ctrl + B. The system displays

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CPU Clock Speed	: 264MHz
BUS Clock Speed	: 33MHz
Memory Size	: 128MB
Mac Address	: 001cc5bc3111

Press Ctrl-B to enter Boot Menu... 1

Press Ctrl + B. The system displays:

Password :

z

z

To enter the Boot Menu, you must press Ctrl + B within one second after the information “Press Ctrl-B to enter Boot Menu...” appears. Otherwise, the system starts to decompress the program; and if you want to enter the Boot Menu at this time, you will have to restart the switch.

By default, the system starts up in fast startup mode and the waiting time here is one second. If you set the startup mode to normal, this waiting time is five seconds. For the setting of the startup mode, refer to the section Changing the Startup Mode.

Input the correct Boot ROM password (by default, no password is set on the switch and you can click Enter directly). The system enters the Boot 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 configuration file

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.

5-2

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Contents 3Com Switch 4210G Family Environmental Statement Conventions Chapter ContentsAbout This Manual OrganizationConvention Description Related DocumentationObtaining Documentation Create FolderTable of Contents Page Iii 4210G 24-Port 4210G 48-Port 4210G PWR 4210G NT OverviewVDC Switch 4210G 24-Port Introduction to Switch 4210GSwitch 4210G 48-Port Switch 4210G PWR 24-Port Switch 4210G PWR 48-Port Switch 4210G NT 24-Port Switch 4210G NT 48-Port PortsConsole Port Specification 10/100/1000Base-T Ethernet Port1000Base-X SFP Port LEDs LEDsCombo Port Model SFP port 10/100/1000Base-T Ethernet portStatus Description Port Mode LEDSystem Status LED RPS Status LEDSeven-Segment LED StatusSystem status Seven-segment LED Description 10/100/1000Base-T Auto-Sensing Ethernet Port Status LED 1000Base-X SFP Port Status LED Status Description Port mode Ethernet portMark Status Description Optional Interface ModulesInterface Module Status LED Short-haul Dual-Port 10 GE CX4 Interface ModuleDual-Port 10 GE XFP Interface Module CX4 Cable Connector type LengthCentral Max Transceiver Connector Fiber Transmission One-port 10 GE XFP Interface ModuleDistance Connector Fiber Transmission Cable type Distance Dual-Port 10 GE SFP+ Interface ModuleTransceiver Central Max 22 SFP+ cable Description of LEDs of Interface ModulesInstallation Site Safety PrecautionsGas Maximum concentration mg/m Temperature/HumidityCleanness Electromagnetic SusceptibilityLaser Safety Installation ToolsInstallation Flow of the Switch Installing the SwitchIntroduction to Mounting Bracket Configuration Type of rear Mounting Bracket Use Front Mounting Brackets to Install a SwitchModel Physical dimensions × W × D Configuration Type of front Mounting bracketUse Front Mounting Brackets and a Tray to Install a Switch Use Front and Rear Mounting Brackets to Install a Switch Page Page Mounting the Switch on a Workbench When a Grounding Strip is Available Connecting the Grounding CableWhere a Grounding Conductor Can be Buried Other Installation Sites Connecting the Power Cords Connecting the AC Power CordSwitch module Power supply Connection method Mode 16Connect an AC power cord to a horizontal AC power socket Connecting the RPS Power CordPage Installing an Interface Card Installing an Interface ModuleRemoving an Interface Module Installing Dedicated CX4/SFP+ CableRemoving Dedicated CX4/SFP+ Cable Installing Switches for an IRFTask Remarks Installation Flow for an IRFFor details, see Installing an Interface Module Drawing a Plan for an IRF with SwitchesConfigure the physical connection mode Page 29Cable connections for an IRF with 1-port interface modules Verifying the InstallationConsole Cable Setting up the Configuration EnvironmentConnecting 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 Powering on the SwitchPowering on the Switch Describes the fields above 2Description on the fields Changing the Startup Mode Enter Y. The system displays the following information BUS Clock Speed 33MHz Memory Size 128MB Mac Address Page Loading Software Through the Boot ROM Menu Boot MenuIntroduction to Loading Modes Press Ctrl + B. The system displays Introduction to Xmodem Loading Software Using Xmodem Through Console PortROM file effective Required2Properties dialog box Cccccccccccccccccc CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCdone Loading host software Loading Software Using Tftp through Ethernet PortLoad File name Introduction to FTP Loading Software Using FTP Through Ethernet PortDescription Loading Software Through CLI Loading Software Using FTPUpdate the Boot ROM program on the switch Loading Software Using TftpSoftware Loading Failure Password Missing FailureMissing User Password Missing Boot ROM PasswordRPS&AC input Power Supply FailureAC input RPS inputFan Failure Mark State System status LEDSteady red Configuration System Failure Troubleshooting when there is no terminal displayTroubleshooting when the terminal display is illegible