I have a 1gb connecfion with a raspberry pi 4b, I have the setup without the usb dongle, but with a managed switch, see this threat.
The raspberry pi does needs cooling, I'm using this one. (picture is for a raspberry pi 3)
its same i think what i buy it. but i dont understand without dongle its better ? and what i need exacly for this ? i read it topic what u send link but i didnt understand it someone can make it basic 
my english not perfect and translate not good.
Maybe.
Probably not.
If your internet speed is less than 1gbps (adding up and down speeds) you can use a very smart switch for both wan and lan.
It is one less wire going to Pi.
i buy 2 gb microsd card and i install openwrt inside.i put lan cable rpi4 to my pc and i open web browser 192.168.1.1 . after this part i stuck because i need to upload package ' kmod-usb-net-asix-ax88179 ' but dont have a ethernet right now how i will install this package ? if i put wan cable to port this time i cant join panel. sorry for bad english. someone can help me about this . i dont have experience .
İ can share screen from discord id : gnzowakabayashi
Rebuild the firmware, again, and add ALL needed drivers at the end of customized packages.
This driver ouroboros was, specifically, mentioned in post 20.
how i will do this sir can u help me please about this i am really beginner about this openwrt i dont want to do someting wrong and brake someting.
Read post 20; follow it pedantically and I reiterate:
You cannot break the Pi. You cannot brick it.
You can continue to try to chop down a tree with a hammer but that gets old.
You are here for advice; please honor us by taking the advice we give.
You are right, sir, but first of all, my English is not perfect and when I use translation, some sentences are translated incorrectly or meaninglessly. I'm sure the advice you give will definitely come in handy. I will try my best
When you get to those sentences ask us to rephrase it so you get a better translation.
I'm really sorry for wasting your time. I think I solve the problem. I will inform you. Thank you so much
You are not wasting my time.
I would walk away if I felt you were wasting my time.
surum olustur
It may take a few minutes to build.
Then Factory (SQUASHFS).
It will download.
Use the download and flash your USB (or whatever media) you want.
Boot the Pi and DO NOT configure anything yet.
Do not plug in the USB ethernet dongle yet.
ok i will do and about version snapshot better or not ?
Firmware Selector is your best option.
ok thank u sir
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No.
We need to work with what should be in the Lan (br-lan) before we start adding other variables.
Please screenshot Network/Interfaces.
thank you.
Now, Please screenshot Network/Devices.