Hello and Welcome to LinuxQuestions,
RedHat is a paying distro so be prepared that a lot of people will tell you to put the money you payed for a license to work. Besides that Google is your best friend when you need documentation. A quick Google search with the right keywords links you to gems like this
Configuring HP ILO Management Boards as Fencing Devices. Hope this helps, have fun with Linux.
Kind regards,
Eric