Procedure to find out WWN information from ILO:

Log on to ILO and open remote console. Reboot the box by clicking ctrl-alt-del tab as marked in the screen shot.

Press F11 when you see the below screen followed by any key to view option ROM Messages

Keep pressing Ctrl+e when you see below screen to enter Emulex BIOS Utility.

You will get the below screen where you can enter the choice either 1 or 2 to get WWN details of the server.

In this case choice 1 has been selected and below are the WWN details.