IOS - ROMMON reset command

When using the ROMMON bootstrap program for a router or switch, the reset command can be used to reboot the device. This command is typically executed after making configuration changes or after recovering the device, such as when:

  • Loading a New IOS Image: After specifying the correct image path or environment variables, you can use the reset command to reboot the device and attempt to load the newly defined image.

  • Configuration Register Changes: If you’ve modified the Configuration Register using the confreg command (e.g., to bypass the startup configuration for password recovery), you can use the reset command to restart the device and apply the changes.

  • Exiting ROMMON: After completing troubleshooting or recovery tasks, using reset will restart the device and attempt to boot into the normal IOS mode.

Syntax

rommon> reset
  • The device will reboot and attempt to load the IOS image specified in the boot environment variables (e.g., BOOT or BOOTLDR).
  • If there is no valid image specified or the configuration is incorrect, the router may return to ROMMON mode again.

https://networklessons.com/cisco/ccna-200-301//cisco-ios-router-password-recovery