清除Console口密码登录后请马上配置新的密码。
在此操作过程中不要对设备进行下电。
用串口线连接设备，然后重启，当出现“Press Ctrl+B to enter Boot Menu…”打印信息时，按下“Ctrl+B”并键入密码（缺省为“Admin@huawei.com”，老版本设备可能为“huawei”），进入BootROM主菜单。
清除Console口登录密码。
BOOTROM MENU
-
Boot with default mode
-
Enter serial submenu
-
Enter startup submenu
-
Enter ethernet submenu
-
Enter filesystem submenu
-
Modify BOOTROM password
-
Clear password for console user
-
Reboot
Enter your choice(1-8):7
Note: Clear password for console user? Yes or No(Y/N): y
Clear password for console user successfully. Choose ‘1’ to boot, then set a new
password.
Note: Do not choose ‘8. Reboot’ or power off the device, otherwise this operatio
n will not take effect.
根据设备的提示，在BootROM主菜单下选择“1”启动设备。
完成系统启动后，通过Console口登录时不需要认证，登录后配置Console口密码，以修改为密码认证，并修改密码为“huawei@123”为例。
system-view
[HUAWEI] user-interface console 0
[HUAWEI-ui-console0] authentication-mode password
[HUAWEI-ui-console0] set authentication password cipher huawei@123
[HUAWEI-ui-console0] return
为了防止重启后配置丢失，保存配置。
save
The current configuration will be written to the device.
Are you sure to continue?[Y/N]y
Now saving the current configuration to the slot 0.
Save the configuration successfully.
