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思科Catalyst交換機(jī)密碼恢復(fù)妙招

2020-04-18 12:56:14
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供稿:網(wǎng)友
  如果交換機(jī)的login密碼忘記了咋辦啊?
  別急別急,只要你有PC,有類似超級(jí)終端(Hyper Terminal)這樣是終端程序,連接到交換機(jī)的console口,那么密碼的恢復(fù)就簡(jiǎn)單了。
  
  1.對(duì)于Catalyst 2900/3500XL系列來說:
  拔下交換機(jī)的電源線,然后按住交換機(jī)的Mode按鈕,再重新插上交換機(jī)的電源線.直到端口Port 1x的LED熄滅之后釋放Mode按鈕。
  就這么簡(jiǎn)單,別告訴我你不知道Mode按鈕在哪啊。
  
  2.對(duì)于Catalyst 2940/2950L系列來說:
  拔下交換機(jī)的電源線,然后按住交換機(jī)的Mode按鈕,再重新插上交換機(jī)的電源線.直到STAT的LED熄滅之后釋放Mode按鈕。
  
  3.對(duì)于Catalyst 2955系列來說:
  Catalyst 2955沒有沒有外部的Mode按鈕,因此就不能使用之前的那種方法來進(jìn)行密碼恢復(fù).在交換機(jī)啟動(dòng)時(shí),對(duì)于Windows系列的PC,按下Ctrl+Break鍵;對(duì)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
  /---接下來交換機(jī)會(huì)在15秒內(nèi)自動(dòng)啟動(dòng),等出現(xiàn)該信息之后,按下Ctrl+Break鍵或Ctrl+C鍵----/
  
  The system has been interrupted prior to initializing the flash file system to finish
  loading the operating system software:
  flash_init
  load_helper
  bootswitch:
  
  接下來輸入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:
  
  接著輸入load_helper命令:
  switch:load_helper
  switch:
  
  再輸入dir flash:命令顯示交換機(jī)的文件系統(tǒng):
  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:
  
  輸入boot命令啟動(dòng)交換機(jī):
  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)
  
  不進(jìn)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
  
  進(jìn)入特權(quán)模式,恢復(fù)原始的配置文件:
  Switch#rename flash:config.old flash:config.text
  Destination filename [config.text]
  Switch#
  
  把配置文件保存在內(nèi)存里:
  Switch#copy flash:config.text system:running−config
  Destination filename [running−config]?
  1131 bytes copied in 0.760 secs
  Switch#
  
  進(jìn)入全局配置模式,取消密碼設(shè)置:
  Switch(config)#no enable secret
  
  保存配置:
  Switch#write memory
  Building configuration...
  [OK]
  Switch#
  
  搞定了@_@
  
  4.對(duì)于Catalyst 3550/3750系列來說:
  1.通過帶有支持Xmodem協(xié)議的超級(jí)終端程序的PC連接到交換機(jī)的console口,把波特率設(shè)置為9600。
  2.拔掉交換機(jī)的電源。
  3.按下交換機(jī)上的Mode按鈕,與此同時(shí),重新插上交換機(jī)的電源線。當(dāng)交換機(jī)端口1X上的LED熄滅后可以松開Mode按鈕1到2秒,之后將顯示一些指示信息:
  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文件系統(tǒng):
  switch#flash_init
  5.加載幫助文件:
  switch#load_helper
  6.顯示閃存里的內(nèi)容:
  switch#dir flash:
  7.重命名配置文件:
  switch#rename flash:config.text flash:config.text.old
  8.啟動(dòng)系統(tǒng),并且如果提示進(jìn)入setup模式,輸入N:
  switch#boot
  Continue with the configuration dialog? [yes/no]: N
  9.進(jìn)入特權(quán)模式,把配置文件名恢復(fù)為原始文件名:
  Switch#rename flash:config.text.old flash:config.text
  10.把配置文件寫進(jìn)內(nèi)存:
  Switch#copy flash:config.text system:running-config
  Source filename [config.text]?
  Destination filename [running-config]?
  11.進(jìn)入全局配置模式更改密碼:
  Switch(config)#enable secret {password}
  12.退出,并保存到startup-config文件里:
  Switch(config)#copy running-config startup-config
  
  其實(shí)有的時(shí)候硬件安全比軟件安全還要重要些.不然人人都抗個(gè)本本,.連根線到console口去恢復(fù)密碼了。
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