Breaking of Cisco Router Passwork without loosing any data

Step-1 : Switch off the router and then switch it on after some time , within the first few seonds of booting press the CTRL+Break Keys

The router will enter the ROM Monitor mode .

Rommon1>

Step-2: In the ROM Monitor mode change the configuration Register to 0x2142 to ignore the Startup Configuration file upon booting

Rommon1>confreg 0x2142

Rommon2>(For initiating the boot sequence)

On Booting the router will enter the Setup mode .

Would you like to enter the initial configuration guidelines (yes/no):

Step-3: Dont select any option (Yes or No) , just skip the setup mode by pressing CTRL+C.The router will now enter the User Exec mode

Step-4:Enter the privilige mode and copy the startup configuration file to the RAM(Running-Config)

Router>enable

Router#copy startup-config running-config

Step-5:Change the enable/enable secret or whatever password you want to change and then the configuration to the NVRAM

Router(config)#enable secret Cisco

Router#wr

Step-6:Dont forget to change the config-register value to the default

Router(config)#config-register 0x2102

The procedure is quite useful in case someone has lost the password and wants to break it without affecting the rest of the configuration .