Sometimes, the Cisco-enable or secret password is unknown and you must use password recovery to attain or change the enable/secret password.
Password recovery allows the network administrator to recover a lost or unknown password on a Cisco router. For password recovery, an administrator must have physical access to the router through the console or auxiliary port. When an EXEC user enters an incorrect enable password, the user receives an error message similar to the message shown in Example 4-17; the password entered is Cisco which is displayed as *****.
Example 4-17. Incorrect Password Error Message
R1>enable Password: ****** Password: ***** Password: ***** % Bad passwords R1>
When a user receives a % Bad passwords message, ...