Is the server giving out the correct details via BOOTP?
/etc/dhcp/dhcpd.conf. ISCs dhcpd won’t dish out addressing information via BOOTP unless the machine has been statically defined with a fixed address. • Are you exporting /nfsroot in your /etc/exports? Make sure you are exporting that to the Cobalt machine. It only needs read-only access. Also remember to run exportfs -av after you edit the file.