交换机上电前，按住“mode”按钮，直到sys灯变绿色且快速闪动，或者出现The password-recovery  mochanism  is enabled。提示信息后松开mode按钮，进入到交换机的底层模式

switch：

在出现的菜单中选择第一项 出现三个选项system software:flash_init load_helper boot

switch:flash_init  //初始化switch:load_helper  //帮助

switch: dir flash:     //可以看到vlan.dat和config.text文件

Directory of flash:/

    2  -rwx          27   Mar 1 1993 08:36:05 +08:00  private-config.text     4  -rwx        6264   Mar 4 2022 19:30:55 +08:00  vlan.dat     5  -rwx        5279   Mar 1 1993 08:36:05 +08:00  config.text     6  drwx         192   Mar 1 1993 08:08:55 +08:00  c3560-ipbase-mz.122-25.SEE2

32514048 bytes total (24348160 bytes free)

switch: rename  flash:config.text  flash:config.old  //重命名flash：config.text文件

switch: boot    //重启交换机

重启之后，当出现问你是否进行配置时，选择NO（因为它找不到配置文件config.text文件了）Would you like to enter the initial configuration dialog? [yes/no]:no

Switch> enable *从用户模式登陆特权模式，就无需密码了Switch#

Switch#ren  flash:config.old  flash:config.text   *恢复刚才重命名的配置文件名Destination filename [config.text]?  直接回车

Switch#copy flash:config.text  system:running-config   *用老的配置文件替换当前的配置文件Destination filename [running-config]? 直接回车Switch#conf t  *进入全局模式switch(config)#enable password tact *设置密码switch#wr  *保存配置

或用命令 copy running-config starting-config OK到这里我们的密码就改好了

switch#reload

@####################################################################

实例：          --- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: no Switch>enable

Switch#ren flash:config.old  flash:config.text % Ambiguous command:  "ren flash:config.old  flash:config.text" Switch#ren flash:config.old  flash:config.text % Ambiguous command:  "ren flash:config.old  flash:config.text" Switch#ren % Incomplete command.

Switch#ren? rename  renew  

Switch#rename flash:config.old flash:config.text Destination filename [config.text]?  Switch#copy flash:config.text system:run? system:running-config  

Switch#copy flash:config.text system:ru  Switch#copy flash:config.text system:running-config Destination filename [running-config]? 

5398 bytes copied in 0.453 secs (11916 bytes/sec) wireless-3# 000004: *Mar  1 00:07:20: %SYS-6-CLOCKUPDATE: System clock has been updated from 00:07:20 UTC Mon Mar 1 1993 to 08:07:20 BJ Mon Mar 1 1993, configured from console by console. wireless-3#