1.拔掉交换机的电源线
2.用超级终端和控制线连到交换机，超级终端的设置是：
9600 baud rate No parity 8 data bits 1 stop bit No flow control |
3.按住交换机前面板的“mode”按钮，插上电源线，当端口1上面的灯不亮后，放松“mode”按钮；
4.这时超级终端上应该显示：
The system has been interrupted prior to initializing the flash file system. The following commands will initialize the flash file system, and finish loading the operating system software: flash_init load_helper boot |
5.输入
flash_init |
6.输入
load_helper |
7. 输入
dir flash: |
这时显示：
Directory of flash: 2 -rwx 843947 Mar 01 1993 00:02:18 C2900XL-h-mz-112.8-SA 4 drwx 3776 Mar 01 1993 01:23:24 html 66 -rwx 130 Jan 01 1970 00:01:19 env_vars 68 -rwx 1296 Mar 01 1993 06:55:51 config.text 1728000 bytes total (456704 bytes free) |
8.输入
rename flash:config.text flash:config.old |
9.输入boot，重新启动系统
10.系统启动完后显示：
Continue with the configuration dialog? [yes/no] : 输入N |
11.输入
enable |
12.进入enable模式后，输入
rename flash:config.old flash:config.text |
13.接着按以下步骤操作：
Switch# copy flash:config.text system:running-config Source filename [config.text]? (press Return) Destination filename [running-config]? (press Return) |
14 .接着按以下步骤操作：
switch#configure terminal switch(config)#no enable secret switch(config)#no enable password switch(config)#exit switch#write memory |
这时,系统就恢复没有密码的状态了。
