Epson DFX-9000 - Manual (Page 166)

166 Options and Consumables
8. Set the numbers for SM byte 1 to 4 and GW byte 1 to 4 in the
same way as the IP byte 1 to 4.
9. Confirm the numbers that you selected for the IP byte 1 to
4 , SM byte 1 to 4, and GW byte 1 to 4 are correctly set.
10. When you finish making settings, press the Menu (Tear Off
and Top of Form) buttons.
11. The LCD displays Save Setting. If you want to save the
settings, select Yes by pressing the SetU (Tear Off) button. If
you do not want to save the settings, select No by pressing the
SetD (Top of Form) button.
12. Turn off the printer.