CCNA LAB Practice - Password Recovery

Password Recovery

 Objective

This lab demonstrates how to recover the password of 2500 series Routers. Password Recovery procedure allows you to regain administrative control over the device.

Diagram

Procedure

1. Attach a PC with terminal emulation software to the Router’s Console port.
2. Turn off the Router, and turn it on and press the Break Key on the PC within 60 seconds of turning on the Router.
3. Enter the command to By-Pass the NVRAM on the > prompt and initialize the Router by command.
4. Enter no in response to the System Configuration dialog prompts.
5. Enter into the Router and copy the configuration from the NVRAM, change the password & change the value of the configuration register & save the configuration into NVRAM again and reload the Router.

Configuration         

Step 1: Attach a PC with terminal emulation software to the Router’s Console

                 Port.

The configuration register value is 0x2102 by-default. It’s mean that whenever the Router boots, it will read the contents of the NVRAM. So, we need to by-pass the NVRAM at the time of startup for the password recovery.

Step 2: Turn off the Router, and turn it on and press the Break Key on the PC

                 within 60 seconds of turning on the Router.

The > prompt with no Router name appears at the Router screen.

Step 3: Enter the command to By-Pass the NVRAM on the > prompt and

                 initialize the Router by command.

> o/r 0x2142 (to boot from flash)

> i                  (initialize the Router)

> 

Step 4: Enter no in response to the System Configuration dialog prompts until the

                following message appears.

Press RETURN to get started!

Step 5: Enter into the Router and copy the configuration from the NVRAM,

                 change the password & change the value of the configuration register &

                 save the configuration into NVRAM again and reload the Router.

Router>enable

Router#copy stratup-config running-config

Router#config t

Router(config)#no enable password

Router(config)#enable password cisco

Router(config)#configuration-register 0x2102

Router(config)#end

Router#write memory  (Equivalent Command of copy running-config startup-config)

Router#reload