How do I set up the printer's IP address using the control panel?
Press the Set button, press the + button until NETWORK is displayed and press Set, then press + button until IP ADDRESS= is displayed and press Set. Enter your IP address using the + and - buttons, pressing Set to move to the next digit. Press Set again to complete the IP address entry.
From the official Brother HL-3450CN Color Laser Printer manual, page 2
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