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Wednesday, February 24, 2010

Cisco Router password recovery

please note that this routine may not work on some Cisco models
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reboot the router by power off and on the device

when it started to boot, press break key while holding the control key

this will bring you to the rommon mode, once in, type confeg

1st option will prompted 'do you wish to change the configuration? y/n  [n]:' answer with 'y'

after that press 'n' for all the option except this line 'enable  "ignore system config info"? y/n  [n]:',
type 'y'

then type reset



after reboot, you will notice from the show version that your register now is set to 0x2142, this is config bypass mode

if you want to keep previous startup config, copy startup to running config
then change the password




if you want a fresh start, just simply erase starup config by overwrite running into startup config

last !! don't forget to change register to normal mode again, type config-register 0x2102, copy run star and reboot


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