A node of an x86_64 or x86 image profile gets netboot=ipxe, and the
ppc64le and riscv64 profiles keep grub2. The x86 node templates, read
with the stanza parser of mkdef, define netboot=ipxe, the ppc64le
template keeps petitboot, and the e1350 noderes table gives the compute
group ipxe.
A profile change keeps netboot=xnba, and gives a node without a method,
a netboot=pxe node and a node of another architecture the method of its
profile.
Vinícius Ferrão