But as the GRUB2 part alone is already useful for people that are
familiar with the supporting service infrastructure, I just finished
up this part and put it into the Debian wiki. I will add more
information later if need be - I have to check the available
information about network services first.
The methods described on [1] work for me to network boot my UltraSPARC
gear, but you need kernel and initramfs as separate files.
I will go take a look at that. Perhaps even separate the NFS and TFTP
services into two machines just because I can. I don't think that there
is any need to worry about the RARP and IP address bits for now as that
all seems to happen in three quick packets from the forth firmware on
most sparc units with a "net boot" command. Note that the tftp request
does not require a suffix ".SUN4U" on the filename.