2。对于Catalyst 2940/2950L系列来说:

拔下交换机的电源线,然后按住交换机的Mode按钮,再重新插上交换机的电源线.直到STAT的LED熄灭之后释放Mode按钮.

3。对于Catalyst 2955系列来说:

Catalyst 2955没有没有外部的Mode按钮,因此就不能使用之前的那种方法来进行密码恢复.在交换机启动时,对于Windows系列的PC,按下Ctrl+Break键;对于UNIX系列的工作站,按下Ctrl+C.如下:

C2955 Boot Loader (C2955−HBOOT−M) Version 12.1(0.0.514), CISCO DEVELOPMENT TEST

VERSION

Compiled Fri 13−Dec−02 17:38 by madison

WS−C2955T−12 starting...

Base ethernet MAC Address: 00:0b:be:b6:ee:00

Xmodem file system is available.

Initializing Flash...

flashfs[0]: 19 files, 2 directories

flashfs[0]: 0 orphaned files, 0 orphaned directories

flashfs[0]: Total bytes: 7741440

flashfs[0]: Bytes used: 4510720

flashfs[0]: Bytes available: 3230720

flashfs[0]: flashfs fsck took 7 seconds.

...done initializing flash.

Boot Sector Filesystem (bs:) installed, fsid: 3

Parameter Block Filesystem (pb:) installed, fsid: 4

/---接下来交换机会在15秒内自动启动,等出现该信息之后,按下Ctrl+Break键或Ctrl+C键----/

The system has been interrupted prior to initializing the flash file system to finish

loading the operating system software:

flash_init

load_helper

bootswitch:

接下来输入flash_init命令:

switch:flash_init

Initializing Flash...

flashfs[0]: 143 files, 4 directories

flashfs[0]: 0 orphaned files, 0 orphaned directories

flashfs[0]: Total bytes: 3612672

flashfs[0]: Bytes used: 2729472

flashfs[0]: Bytes available: 883200

flashfs[0]: flashfs fsck took 86 seconds

....done Initializing Flash.

Boot Sector Filesystem (bs:) installed, fsid: 3

Parameter Block Filesystem (pb:) installed, fsid: 4

switch:

接着输入load_helper命令:

switch:load_helper

switch:

再输入dir flash:命令显示交换机的文件系统:

switch:dir flash:

Directory of flash:/

2 −rwx 1803357 c3500xl−c3h2s−mz.120−5.WC7.bin

4 −rwx 1131 config.text

5 −rwx 109 info

6 −rwx 389 env_vars

7 drwx 640 html

18 −rwx 109 info.ver

403968 bytes available (3208704 bytes used)

switch:

把配置文件重命名:

switch:rename flash:config.text flash:config.old

switch:

输入boot命令启动交换机:

switch:boot

Loading "flash:c3500xl−c3h2s−mz.120−5.WC7.bin"...###############################

################################################################################

######################################################################

File "flash:c3500xl−c3h2s−mz.120−5.WC7.bin" uncompressed and installed, entry po

int: 0x3000

executing...

不进入setup模式:

−−− System Configuration Dialog −−−

At any point you may enter a question mark '?' for help.

Use ctrl−c to abort configuration dialog at any prompt.

Default settings are in square brackets '[]'.

Continue with configuration dialog? [yes/no]: n

进入特权模式,恢复原始的配置文件:

Switch#rename flash:config.old flash:config.text

Destination filename [config.text]

Switch#

把配置文件保存在内存里:

Switch#copy flash:config.text system:running−config

Destination filename [running−config]?

1131 bytes copied in 0.760 secs

Switch#

进入全局配置模式,取消密码设置:

Switch(config)#no enable secret

保存配置:

Switch#write memory

Building configuration...

[OK]

Switch#

4。对于Catalyst 3550/3750系列来说:

1.通过带有支持Xmodem协议的超级终端程序的PC连接到交换机的console口,把波特率设置为9600.

2.拔掉交换机的电源.

3.按下交换机上的Mode按钮,与此同时,重新插上交换机的电源线.当交换机端口1X上的LED熄灭后可以松开Mode按钮1到2秒.之后将显示一些指示信息:

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

switch#

4.初始化flash文件系统:

switch#flash_init

5.加载帮助文件:

switch#load_helper

6.显示闪存里的内容:

switch#dir flash:

7.重命名配置文件:

switch#rename flash:config.text flash:config.text.old

8.启动系统,并且如果提示进入setup模式,输入N:

switch#boot

Continue with the configuration dialog? [yes/no]: N

9.进入特权模式,把配置文件名恢复为原始文件名:

Switch#rename flash:config.text.old flash:config.text

10.把配置文件写进内存:

Switch#copy flash:config.text system:running-config

Source filename [config.text]?

Destination filename [running-config]?

11.进入全局配置模式更改密码:

Switch(config)#enable secret {password}

12.退出,并保存到startup-config文件里:

Switch(config)#copy running-config startup-config