• Method 1: Log in to the device using Telnet and change the console port password.

• Method 2: Clear the console login password in BootROM and change the console port password.Method 3: Rename the current startup configuration file in BootROM, restart the device with no configuration, and change the console port password.

1. Logging In to the Device Using Telnet and Modifying the Console Port Password

If you have a Telnet account and your user right is level 3 or higher, log in to the device using Telnet, change the console port password, and save the configuration.

1. Log in to the device using Telnet. Ensure that your user right is level 3 or higher.

   Run the display users command to display all the users that have logged into the device. The item with a "+" mark indicates your user account on user interface VTY1.

   Run the display user-interface command to display the user right of all users. VTY1 has a corresponding user right 15; therefore, you have the right to change the console port password.
   

2.Change the console port password. In this example, you set the authentication mode to password authentication and the password to huawei@123.

3. Save the configuration to prevent configuration loss after a restart.

Clearing the Console Login Password in BootROM and Changing the Console Port Password

The BootROM allows you to clear the console port password so that the device does not check the password when you log in through the console port. When the device starts, you do not need to enter the console port password and all configurations are loaded as normally. After the device starts, change the console port password and save the configuration.

1.  Connect a PC to the device with a serial cable and restart the device. When the message "Press Ctrl+B to break auto startup ..." is displayed, press Ctrl+B and enter the password (huawei by default) to display the BootROM main menu.

2. Clear console login password.

3. Log in to the device through the console port. Authentication is not required when you log in. Change the console port password. In this example, you set the authentication mode to password authentication and the password to huawei@123.

4. Save the configuration.

Renaming the Current Startup Configuration File in BootROM, Starting the Device with No Configuration, and Changing the Console Port Password

Rename the current startup configuration file in BootROM and restart the device with an empty configuration file. Export the configuration file to the PC, change the console port password, and replace the configuration file on the device with the new configuration file.

Note:

• You must restart the device to display the BootROM menu, which results in service interruption. Migrate services to a backup device and perform this operation at leisure time.

• Do not power off the device during the operation.

1. Connect a PC to the device with a serial cable and restart the device. When the message "Press Ctrl+B to break auto startup ..." is displayed, press Ctrl+B and enter the password to display the BootROM main menu.

2. Rename the current startup configuration file.

3. After the device starts, it restores the default factory settings and prompts you to set the console port password. In this example, you set the password to huawei@123.

4. Configure the device as an FTP server. Create an FTP path that is the same as the path where the renamed configuration file is saved.

5. Download the renamed configuration file to the PC.

6. Decompress the file on the PC and use the text editor to open the file. (The built-in text editor of the system is recommended.) Delete the configuration about console port authentication and compress the file to a .zip file.

7. Upload the configuration file to the device and overwrite the original configuration file.

8. Specify the new configuration file for next startup. Restart the device without saving the configurations.

9. Set the console port password as prompted. For example, set the password to huawei@123.

10. Save the configuration to prevent configuration loss after the next restart.

https://support.huawei.com/enterprise/en/doc/EDOC1000079719/5303df4e/recovering-the-console-port-password