一台Cicso Catalyst 3750-E交换机忘记enable密码后无法进入调试，只能想办法将密码去除，但需保留原来交换机的配置。
步骤如下：
1、将交换机console口与电脑相连，再按住交换机面板前的“mode”键，然后重启交换机，直到面板的”STAT”灯亮，放手。如下图。
2、此时会出现如下菜单，依次输入flash_init，load_helper，然后重命名配置文件名称，最后输入boot重启交换机，操作如下：
The system has been interrupted prior to initializing the
flash filesystem. The following commands will initialize
the flash filesystem, and finish loading the operating
system software:
flash_init
load_helper
boot
switch: flash_init
Initializing Flash…
flashfs[0]: 4 files, 1 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 15998976
flashfs[0]: Bytes used: 8282624
flashfs[0]: Bytes available: 7716352
flashfs[0]: flashfs fsck took 11 seconds.
…done Initializing Flash.
Boot Sector Filesystem (bs) installed, fsid: 3
Setting console baud rate to 9600…
switch: load_helper
switch: dir flash:
Directory of flash:/
2 -rwx 8276561 <date> c3750-ipservices-mz.122-37.SE.bin
3 -rwx 616 <date> vlan.dat
4 -rwx 5 <date> private-config.text
6 -rwx 3027 <date> config.text
7716352 bytes available (8282624 bytes used)
switch: rename flash:config.text flash:config.text.old
switch: boot
Loading “flash:/c3750-ipservices-mz.122-37.SE.bin”…@@@@
3、重启后进入系统进行如下操作
Would you like to enter the initial configuration dialog? [yes/no]: no //选择no
Would you like to terminate autoinstall? [yes]: //选择yes
还原配置文件名称，并复制配置文件至running中
Switch>en
Switch#rename flash:config.text.old flash:config.text
Switch#copy flash:config.text system:running-config
进入配置模式，去除enable密码，并保存至start-config中
c3750#configure terminal
c3750(config)#no enable password
c3750(config)#exit
c3750#wr memory
00:04:04: %SYS-5-CONFIG_I: Configured from console by console
Building configuration…
[OK]
这样，交换机的enable密码就去除完成了。
