Sun Microsystems Enterprise 250 Owner's Manual page 202

b. To install the operating system onto the server's internal system disk, enter:
ok boot net - install
Both commands boot the system, and the system console displays the system
prompt.
What Next
If you want to use the main logic board Ethernet interface as the default boot device,
you must change the value of certain OpenBoot parameters. For more information,
see OpenBoot 3.x Command Reference Manual in the Solaris System Administrator
AnswerBook for your specific Solaris release.
184 Sun Enterprise 250 Server Owner's Guide • June 1998