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Use the LEDs to determine when it's done.Ħ) You can now power down the AT&T Gateway and disconnect it from the dumb switch.ħ) Connect your router's WAN port to the dumb switch and power the router on.Ĩ) Within a minute or two it should acquire the same IP, gateway and DNS as the gateway had.ĩ) Enjoy the full speed of your connection and rest easier because you aren't subject to the regular AT&T Gateway firmware updates that break more things than they fix.Įssentially what's happening is that the ONT needs authentication for your connection. Let it go for ~2 min to make the fiber connection.ģ) Power on the dumb switch and connect ONT's Ethernet port to one port of the dumb switch.Ĥ) Connect the WAN port of the AT&T Gateway to another port on the dumb switch and power the Gateway on.ĥ) Wait 1-2 minutes for the AT&T Gateway to connect. I am thinking of this router it has enough ports I don’t need a switch do I?ġ) Make note of the AT&T Gateway's MAC address and then go into your third party router and change the MAC address of the WAN port of that router to be the same as on the AT&T gateway.Ģ) With everything from a fully off state, connect just fiber and the power cable to the ONT and power it on. he sent me these instructions,do I need the dumb switch I have a 4 port router? this is the one I got Ok i kind gentleman started helping me hopefully he sees this or someone else and can help me.I only use directtv and fiber gigabit.no uverse tv or voice.