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CISCO交换机找回特权密码的方法

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  如果交换机的login密码忘记了,别急别急,只要你有PC,有类似超级终端(Hyper Terminal)这样是终端程序,连接到交换机的console口,那么密码的恢复就N简单了.接下来是小编为大家收集的CISCO 交换机找回特权密码的方法,希望能帮到大家。

  CISCO 交换机找回特权密码的方法

  1.对于Catalyst 2900/3500XL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.直到端口Port 1x的LED熄灭之后释放Mode按钮.

  就这么简单,别告诉我你不知道Mode按钮在哪啊-_-#

  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 <date> c3500xl−c3h2s−mz.120−5.WC7.bin

  4 −rwx 1131 <date> config.text

  5 −rwx 109 <date> info

  6 −rwx 389 <date> env_vars

  7 drwx 640 <date> html

  18 −rwx 109 <date> 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...

  (略)

  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


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