Dell 3115cn Color Laser Printer - Manual (Page 359)

Power the multifunction printer off and back on or reset the network interface card. 6.
Resetting the Network Interface Card
You can reset the network interface card when a network problems occurs.
Press until >SETUP appears, and then press . 1.
Press until >Admin Menu appears, and then press . 2.
Press until >Wired Net appears, and then press . 3.
Press until >Initialize NVM appears, and then press . 4.
Press to select Yes, and then press . 5.