Connecting Multiple Routers in One Network: B315 Router, Attic Setup, 2-Story House, LTE Internet

Hello.
I have been struggling for some time with remaking the wifi network at home, because someone constantly complains that it works poorly, although I have never experienced any problems myself, except maybe for a second breaking the wifi signal. I have a 2-story house, 3 routers and 1 swtich. I have Internet connected to the B315 router in the attic, which connects to the world with an antenna with an Orange transmitter (LTE internet). A switch is connected directly to the router in the attic. The router on the first floor and on the ground floor is connected to the switch via the LAN port on the router.

Router configuration in the attic:



Configuration of the router on the upper floor:


(WAN not connected)

Router configuration at the bottom:


(WAN not connected)

As far as I know, the routers should be connected via WAN, but when I configured the network in this way, the internet did not work at all ^^. On such settings as it is now, the internet works on every device and every wifi, but sometimes something breaks (but only on wifi - the computer connected to the router on the first floor has no problems).
I would like help with the configuration.

Configuration https://forumsieciowe.pl/index.php?/topic/17-router-bbezpiecz wired-jako-ap-punkt-dost%C4%99powy/ Connection via LAN correct, routers work as AP with DHCP disabled. LAN addresses can be from the LTE router's pool and outside the DHCP range on it. The gateway setting is incorrect, it is the LAN address of the LTE router, i.e. 192.168.1.254

Your settings are correct. If there was a problem with addressing, you can turn on DHCP on the other routers, you only need to enter the gateway address, i.e. IP B315

If you want to be connected via WAN, set the LAN IP of the other two routers to e.g. 192.168. 10 .1 and 192.168. 20 .1
DHCP is to be enabled on both routers. You set up WiFi so that the channels are not next to each other. e.g. downstairs 1 on floor 6 and in the attic 11.

matek451 wrote:

The gateway setting is incorrect, it is the LAN address of the LTE router, i.e. 192.168.1.254

So what exactly needs to be changed, where? Because when it comes to Default Gateway, does it even matter when DHCP is turned off?

Heinzek wrote:

You set up WiFi so that the channels are not next to each other. e.g. downstairs 1 on floor 6 and in the attic 11.

That's exactly how it is set.

If everything is set well, what can be the cause of internet jams? From my observations it happens throughout the house, on every router but only over wifi. For example, pages open normally but sometimes it will throw a page loading error and after refreshing it is ok. On the computer this problem does not occur, and after wifi it occurs on all laptops and phones.

matek451 wrote:

The gateway setting is incorrect, it is the LAN address of the LTE router, i.e. 192.168.1.254

Take a look at the first screen in the first post.

rafor4 wrote:

after wifi is available on all laptops and phones.

How many of these devices do you have?

Heinzek wrote:

Take a look at the first screen in the first post.

In the first screenshot I can't see anything about the gate: /

Heinzek wrote:

How many of these devices do you have?

2 laptops and 3 phones

rafor4 wrote:

In the first screenshot I can't see anything about the gate: /

A gateway is a router that has an "exit" to the world. In the case of your B315 it is the gateway and each device should have HIS ip as the default gateway address.
His IP is described as "IP address"

rafor4 wrote:

2 laptops and 3 phones

So it's not surprising that it is falling apart.
You should do a link stability test by pinging the IP to the connected AP and the IP to the dns server at the same time.

Run in two cmd windows with one command:
ping 192.168.1.254 -t

ping 8.8.8.8 -t

When breaking the link, see if the responses will be lost from both addresses or only to DNS.
In the second case, it's the connection's fault and the first is the wifi's fault.