如果用户口令丢失，可以进入boot菜单：

    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):

    选择[7]，然后重新启动交换机，那么系统在启动后会跳过配置文件。