Breaking password in Cisco Router without changing other configuration

In router IOS document is put away in streak memory and your smaller than normal IOS(Boot) is available in ROM.When the router is started,It loads the IOS record from blaze and Startup setup from NVRAM is stacked into RAM of the router.

In the event that we have overlooked the secret word then we need to quit stacking the IOS document and start up config of router from blaze and NVRAM individually.

We need to utilize Mini IOS to get into the running arrangement which is put away in the memory having the memory address balanced of 0x2142(register esteem)

After reloading,You will be in running configuration.There you can duplicate the startup design from NVRAM to RAM i.e in running configuration.This step is utilized for expelling the secret key so we can reestablish the router without changing other arrangement

Subsequent to expelling the secret word duplicate the estimation of RAM into NVRAM.That is running setup to startup arrangement.

As we have changed the address of startup config,we need to set the beginning location of startup config utilizing config-enlist 0x2102. when we reload the router,we can get to the router  with no change in other arrangement.

STEPS TO BREAK PASSWORD

1 switch off the router and switch on

2.press control+break for real routers(control+C for packet tracer)while reloading

3.confreg 0x2142

4.reset

5.Copy startup config running config

6.Remove password using ‘no’ commends

7.copy running config to startup config

8 Configure register 0x2102

9.reload