Cisco 600 Series Password Recovery

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:

1. Connect your PC to the console port of the router.
2. 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
3. Power cycle the router (turn the router off, then on using the router's power switch)
4. As soon as you see theHello!prompt, type Ctrl-C.
5. 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 keya = c, b = d, c = e, and so on, the password "cisco" would 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

说明：
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