You can reset to the default configuration (valid cDOT initial configuration) and default passwords by breaking-out during a switch [re]boot:
...
FASTPATH Startup Rev: 6.3.1
Select startup mode. If no selection is made within 5 seconds,
the FASTPATH Application will start automatically...
1 - Start FASTPATH Application
2 - Display Utility Menu
Select (1, 2): 2
FASTPATH Startup Rev: 6.3.1
FASTPATH Startup -- Utility Menu
1 - Start FASTPATH Application
2 - Erase Current Configuration
3 - Erase Permanent Storage
4 - Activate Backup Image
5 - Start Diagnostics Application
6 - Reboot
Q - Quit from FASTPATH Startup
Select option (1-11 or Q): 2
Erasing present configuration...done.
FASTPATH Startup Rev: 6.3.1
FASTPATH Startup -- Utility Menu
1 - Start FASTPATH Application
2 - Erase Current Configuration
3 - Erase Permanent Storage
4 - Activate Backup Image
5 - Start Diagnostics Application
6 - Reboot
Q - Quit from FASTPATH Startup
Select option (1-11 or Q): 6
Rebooting...
Cheers,
Seth