If you messed up your DNAC or just want to start over, you can do so by downloading the ISO for the appliance. Get the ISO on the below link:
After downloading the ISO, you must create a USB installer by using Etcher
If you use Rufus or any other tools for the USB installer creation, it might not work due to insanely long file names in the ISO.
You must also NOT mount the ISO with CIMC and install over the network. Although it might work, Cisco discourages using this approach, because they’ve seen many installs go bad. I’ve been there, too!
Be sure to read the release notes carefully! Especially regarding the order of which you install packages after the initial ISO install.
That’s it for this post. I hope you get your DNAC up and running! And remember that SDA is a journey and it will take time – a lot of time!