Restrictions and guidelines
After you execute the fips mode enable command, the system prompts you to choose a reboot method.
If you do not make a choice within 30 seconds or press Ctrl+C, the system enables FIPS mode and waits for you to manually complete the FIPS mode configuration tasks. You must complete the tasks or execute the undo fips mode enable command before saving the running configuration and rebooting the device. If you fail to do so, the device enters FIPS mode after startup and you cannot log in to the device.
If you select the automatic reboot method, you can press Ctrl+C to abort both the interactive FIPS mode configuration process and the fips mode enable command.