@stormi Thank you so much. Only now getting around to setting up another set of R660s, will let you know how this works. Edit: worked beautifully on a new set of R660s. Using the old 20250606 ISO, the BCM57414 were not detected. The new ISO works as expected (BIOS install, did not attempt UEFI) and the NICs are all enumerated properly.

It is in the same place in XO. Network tab of the host. Change the Mode from None to Static (or DHCP). This should get you a pop up to enter the address, netmask, etc.