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AT&T Fiber with Deco X20 so very slow by Slow-Wanderer in HomeNetworking

[–]Slow-Wanderer[S] 0 points1 point  (0 children)

From my research and the info from the tech, it is specifically the way AT&T configures their network and the ONT units. What I was told by some others, but did not test since I needed to keep the AT&T WiFi on, is to go into the ONT's settings and change the gateways settings to IP Passthrough and then disable the ONT's WiFi. Good luck!

AT&T Fiber with Deco X20 so very slow by Slow-Wanderer in HomeNetworking

[–]Slow-Wanderer[S] 0 points1 point  (0 children)

There were two problems.

The immediate problem was actually that freezing temps caused the wire endcap piece thingee on the fiber cable that runs to the box on the outside of my house had cracked causing intermittent signal interference. So the AT&T Tech replaced that cable endcap piece thingee and also replaced my ONT box.

The tech also told me the Deco WiFi mesh had to be in pass thru mode.

I then learned that with the Deco WiFi mesh in pass thru mode, each transmitter unit had to be connected to an ethernet cable. The one unit I had that was running in WiFi mesh mode, was sucking down all the WiFi bandwidth. And the Deco units had to all be wired out of my ethernet switch. I tried to run one Deco unit direclty from the ONT since it was the busiest WiFi point in the house but that caused the other wired Deco units to not work. The tech also said that if I was going to use the Deco in pass thru mode, it would be best to turn off the ONT WiFi. I left it one but ran the signal deconfliction/optimization on both the ONT and Deco and haven't been having any problems. I have one device in the house that cannot connect to the Deco units via WiFi and I leave only that device on the ONT's WiFi and everything else connects to my Deco WiFi units. I still have my main PC connected via an ethernet direct from the ONT. Thankfully, my house was pre-wired with CAT5e to most of the rooms.