Password restoration for Cisco routers (600)

The steps below describe how to recover a password on the Cisco 600 series of routers.

Step 1: Enter RMON mode.

To do this, follow the steps below:

Connect your PC to the console port of the router.
Set your Terminal Access Program (such as HyperTerminal in Windows) to the following settings:
Baud rate: 38400 bps recommended (standard 9600 bps possible)
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
Power cycle the router (turn the router off, then on using the router's power switch)
As soon as you see the Hello! Prompt, type Ctrl-C.
You are now in RMON mode.

Step 2: If you need to save the configuration file, execute the following command:

Db fef80030 100

This command prints the configuration to the screen. The last number indicates the number of bytes to display. Use a value of 100 bytes or more for the number of bytes to display.

Note: You must use the enable password command for the password to display encrypted during password recovery.

Step 3: Look for your encrypted password.

The text of the password will be altered by two letters. for example, using the key a = c, B = d, c = e, and so on, the password "cisco" wocould be "agqam ".

Step 4: (This step is optional.) Erase the current configuration.

An example is shown below:

=> Es 6

Erasing sector 00000006...
Sector erased

=> Rb

Hello!
CBOS v2.0.1.01

Note: This step reboots a Cisco 600 series router with no configuration. You will need to redo the configuration and then use the write command to save the changes to NVRAM.

Step: 5: Reboot the router.

An example is shown below:

Rb