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CH222 Compute Node V100R001 User Guide 18

This document describes the appearance, functions, structure, and installation, removal, and configuration methods of the CH222 compute node.
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Logging In to the U-boot

Logging In to the U-boot

This topic describes how to log in to the Compute Node U-boot over a serial port to debug the Compute Node.

Scenarios

Log in to the Compute Node U-boot over a high-density cable on the Compute Node panel.

The U-boot is used to initialize hardware, such as serial ports or dual in-line memory modules (DIMMs), reads the kernel image from the flash memory to the random access memory (RAM), and starts the operating system (OS). You can load bottom-layer software and debug bottom-layer devices on the U-boot user interfaces (UIs).

Prerequisites

Conditions

You have installed the high-density cable to the compute code.

Data

  • User name for logging in to the compute nodeto be connected.
  • Password for logging in to the compute node to be connected.
  • Password for logging in to the compute node U-boot.

Procedure

  1. Connect the serial port of the high-density port to the serial port of a PC with a serial cable.

    NOTE:

    If you cannot log in to the compute node over a serial port, log in by using the method described in Logging In to a Compute Node or a Switch Module over SOL.

  2. Log in to the compute node over a serial port by using the PuTTY. For details, see Logging In to the Server Over a Serial Port by Using the PuTTY.

    Key communication parameters:

    • Serial Line to connect to: COMn
    • Speed (baud): 115200
    • Data bits: 8
    • Stop bits: 1
    • Parity: None
    • Flow control: None

    n indicates the serial port number, and the value is an integer.

    You can log in to the operating system (OS) or iMana 200 after logging in to a compute node.

    • You have logged in to the iMana 200 command-line interface (CLI) if the following information is displayed:
      Wind River Linux release 3.0 
      Kernel 2.6.27_stm23_003 on armv5tejl (console) 
      BMC login:
    • You have logged in to the OS CLI if the following information is displayed:
      linux-SMM-Test1:~#

      Test1 on the left of the prompt indicates the OS name. The value varies according to the OS name set by users.

  3. Determine whether you have logged in to the iMana 200 CLI.

    • If yes, go to 8.
    • If not, go to 4.

  4. Connect the RS-232 serial port on the PC and the COM port on the active MM910 by using a DB9-RJ45 cable.
  5. Log in to the MM910 CLI by using a serial port communication tool.

    The key communication parameters are as follows:

    • Serial Line to connect to: COMn
    • Speed (baud): 115200
    • Data bits: 8
    • Stop bits: 1
    • Parity: None
    • Flow control: None

    n indicates the serial port number, and the value is an integer.

    The PuTTY is used to log in to the MM910 CLI. For details, see Logging In to the Server Over a Serial Port by Using the PuTTY.

  6. Run the following command to switch to the iMana 200 CLI:

    smmset -l slot number of the compute node -d switchcom -v 4

    For example, if the slot number is 16, run the following command:

    smmset -l blade16 -d switchcom -v 4

    Success

    The following information is displayed, indicating that the interface is successfully switched.

    Success

  7. Log in to the iMana 200 of the compute node again over the serial port. For details, see 1 and 2.
  8. Run the following command to reboot the iMana 200 system of the compute node:

    ipmcset -d reset

    The command output similar to the following is displayed:

    This operation will reboot IPMC system. Continue? [Y/N]:

  9. Enter Y, and press Enter.

    The iMana 200 system restarts.

  10. When the message "Hit 'ctrl + b' to stop autoboot: 1" is displayed, press Ctrl+B immediately.

    The command output similar to the following is displayed:

    ENTER PASSWD:

  11. Enter the password for logging in to the U-boot.
  12. Perform operations on the menu based on actual service requirements.

    NOTE:
    • If you type ? or help and press Enter, the help for all compute node U-boot commands is displayed.
    • After logging in to the U-Boot, you can run the boot command to exit the U-Boot and log in to the OS.

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Updated: 2019-08-16

Document ID: EDOC1000018075

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