Hello,
a factory default reset might be the simplest option. Here is the process:
1. Console into the Router:
Connect to the router using a console cable and a terminal emulation program such as PuTTY or Tera Term.
2. Reboot the Router:
Reboot the router by power cycling it or using the reload command.
3. Interrupt the Boot Sequence:
During the boot process, press the Ctrl + Break (or Ctrl + Pause) keys to interrupt the boot sequence and access ROMMON mode. This may require multiple attempts depending on the timing.
4. Change the Configuration Register:
Once in ROMMON mode, issue the following command to change the configuration register to ignore the startup configuration:
confreg 0x2142
5. Reset the Router:
Restart the router by issuing the reset command.
reset
6. Skip Initial Setup:
When the router reloads, it will prompt you to enter initial configuration mode. Enter no at each prompt until you reach the router's command-line interface (CLI).
7. Load the Startup Configuration:
Load the startup configuration into memory:
copy startup-config running-config
This step is necessary to ensure that you have access to the current configuration.
8. Change the Enable Password:
Enter privileged EXEC mode:
enable
9. Enter global configuration mode:
configure terminal
10. Change the enable password:
enable secret <new_password>
Replace <new_password> with the desired new enable password.
11. Change the Configuration Register Back:
Exit global configuration mode:
exit
12. Change the configuration register back to the default value:
config-register 0x2102
13. Save Changes:
Save the configuration:
write memory
This saves the changes, including the new enable password, to the startup configuration.
14. Verify Access:
Verify that you can access privileged EXEC mode with the new enable password:
enable
