With the IPMI access, you can boot, restart and shutdown your server. Also, you can install your server with your own ISO.
Connect to IPMI iDRAC panel
In order to access on iDRAC panel, enter the IPMI IP address in a web browser. Then, enter your IPMI credentials.
You will find the dashboard.
Connect to virtual console
In this tutorial, we are looking for reinstall your dedicated server with the virtual console that you can find in Console/Media.
When you click on the launch button, the virtual console will start by a Java applet.
Then, you can click on Virtual Media and Launch the virtual media.
After adding your iso, you need to map your drive. Then reboot your server.
In order to boot on virtual media, enter to the Boot Manager by F11 key.