Password Recover in CISCO Router

This is a small lab guide ” how to recover a forgot on password in CISCO device “(Router/Switch)

Since i conduct the lab session on cisco packet tracer but same scenario can apply on the actual device too.

1

Router is looking for the enable password ,let’s reboot router and log in to roman mode by pressing CTRL+C

per requirements to recover password is

  • physical access to device console port

2

Now we are in roman mode let’s look into possible command that can perform in the roman mode by using “?” command

3

Next step is to set configuration register value using “confreg” command.

Configuration register settings are listed in cisco official site  and can be refer for mo details.

http://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/50421-config-register-use.html

4

rommon 2 > confreg 0x2142

5

then , “boot” command need be assign

6

NO PASSWORD REQUESTED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

then to use router again u have to change register configuration to default value and copying start up configuration to running configuration can use to recover old configuration.

warning: if you forgot to change password on router after copying startup config. router will prompt and ask old password.There for change password and saving configuration is must after recovery.

 

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