This link is to the index of password recovery procedures for Cisco products.
Note: For security reasons, the password recovery procedures described there require physical access to the equipment.
Password Recovery Procedures
You need to enter ROMMON mode which may require you to send the BREAK key. Check out the following link to find the suitable BREAK key.
Standard Break Key Sequence Combinations During Password Recovery
It is highly recommended to use a computer that has an actual Serial port (RS-232) when sending BREAK key. Don't use computer that utilize USB port to emulate Serial port since the BREAK key might not be sent properly.
If the router password recovery functionality is disabled, then you can perform tasks provided on this link to re-enable the password recovery functionality.
To Disable and Re-enable Password Recovery Functionality
NOTE:
The Cisco documentation shows copying saved configuration to running configuration as part of the recovery procedure. In some (if not most) cases, this step is a no-no.
Password recovery procedure is necessary when the password to log into the device is unknown and something in the configuration blocks administrative (enable) mode to activate. When you copy saved configuration (that have the block to enable mode access) to running configuration, then basically you are going back to the point before you make any password recovery attempt.
When this is the case, then there should be no copying saved configuration to running configuration as part of the recovery procedure. Instead put enough configuration (or no configuration at all) to the device just to keep it accessible and do the things that can pass traffic.
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by nozero  edited by aryoba
last modified: 2009-05-18 16:32:43 |
