Mount virtual media in iLO 4
Java Web Start
To mount any virtual media in iLO 4 connect to the passthru by using the information that was sent during the delivery of your server and make sure you have the ISO you want to mount ready on your local pc.
After being logged in on iLO pick the integrated console Java Web Start on the front page.
Once the console page is open pick the Virtual Drives option and then the option Image File CD/DVD-ROM
After picking that option a window will open to pick your ISO file, pick the correct ISO in this case, if done correctly when you open the Virtual Drives menu again it will show Image File CD/DVD-ROM as selected.
Now reboot the server and press F11 so you go to the boot menu, pick Boot once from CD-rom and then your choosen ISO should boot.