方法：在BootROM下引导菜单中清除密码

全过程演示：

Login authentication


Password:
Password:
Password:
  Please retry after 5 seconds.

Password:
  Please retry after 10 seconds.

Password:

  Configuration console exit, please retry to log on


Login authentication


Password:
  Please retry after 5 seconds.

Password:
  Password timeout expired
Password:

  Configuration console exit, please retry to log on


Login authentication


Password:
Password:
  Please retry after 5 seconds.

Password:
  Please retry after 10 seconds.

Password: