Hi there, I am trying to set a network provided by a fiber ISP, please see diagram below - using 4 go-coax converter to send internet into 3 different existing coax ports.
Can you please help me here whether this will work? if so, how can I have the 3 wifi routers joining the same network, so the devices connected to all 3 routers can be discoverable among each other.
Also ISP provide static IP address and which device should I assign the static IP, is it the gocoax1 below or each of the wifi router?
Thanks a lot!

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Yuan, if the splitter is behind the wall do you know exactly where it is? Walls are pretty easy to repair especially if they are made of Sheetrock. I have kids so I have to fix holes in my walls all the time :)
Thanks for the advice. I have however discovered the splitter which is hidden behind walls (not replaceable) is only allowing 1 input MoCa adaptor to connect 1 output adaptor, not sure why but it cannot split the coax signal. So I will have to live with having 1 eithernet output in the apartment and invest a mesh system to cover the whole area :-(
but thanks anyway
If, however, the Fiber switch is managed by the ISP, you will need to place either a L2 switch or a router after that fiber switch and before the first MOCA device. You would then use that internal L2 switch or router to assign the external static IP address and to then assign DHCP address to your internal network.
Lastly, the 1st MOCA device as shown in your wiring diagram, should either go before the fiber switch (if it's YOUR switch, not the ISPs) or, AFTER the Fiber Switch (it it's the ISPs fiber switch) but BEFORE your L2 Switch or Router.
Upload a new/updated wiring diagram if you are still unsure and I will look it over
~Old IT Guy (as in older than dirt...)
Is the fiber switch yours or your ISPs? Assuming it's yours, you should assign the static IP to that switch then use DHCP for your internal network. You can, optionally, also assign static IPs to your GoCoax MOCA devices for easier management (which is what I do) but it's not strictly necessary.