Our dozen diskless FreeBSD 7.0 machines are all able to diskless boot just
fine. However, when we tried to set up a FreeBSD 8.0 root for them to boot
from, the boot process would load up all the devices, and then fail right
after the line NFS ROOT: ...
We boot using pxeboot. pxeboot then
http://www.freebsd.org/cgi/query-pr.cgi?pr=139363
suggests
the fix is to set boot.nfsroot.options=nfsv2 in
/boot/loader.conf or via dhcp.
I can see how to set options in /boot/loader.conf, but I don't see how
boot loader options can be set in dhcpd.conf. All I have is: