Router connected to switch or vice versa (House Network Setup)

[MeatFox]

Oh boy, my head is confused.
So we're building a new house and we have a ****load of ports in every room
Right now we are going to get a modem from our isp and the problem is...

Problem:
We have an ASUS RT-AC68u AC1900
the 4g modem that our isp provider is going to give us
~18 ports to every room (stupid people set up 2+ ports in every room)

Thinking of buying a switch to connect all those rooms
we also want an NVR that connects all the 8 cameras of our house to the NVR via PoE
Cameras are connected to the electricty box via PoE cables
Rooms are connected via Ethernet cables

Question:
What setup should we have in this house?
I believe we have a powerful enough router to handle all the internet and be a wifi access point
My idea is that Modem -> Router -> Unmanaged Switch -> every room + NVR. And the ASUS will be the main internet gateway to the Magical Land of the Internet.
Electrician says that it should be Modem -> switch -> router as an access point and switch -> all rooms, but why would we need a more expensive managed switch when we have a powerful router already?

*If anyone asks this is Lithuania, since we live in a town currently we are only getting a 4g modem (100mbps without a data cap) or a crappy old internet line with 6mbps. Either 4g or crappy line is roughly 20Eur per month
megabits not megabytes

Thank you!

 

[bill001g]

I would be extremely surprised if you can get 100m out of a 4g signal. It greatly depends on your distance to the cell tower. Even the LTE versions of 4g do not routinely get 100m most are in the 50m range max, they are starting to introduce so called 5g that will get over 100m in real world uses.

In any case you install is always the same. Modem----router----switch.

If your modem is actually a router then you can do modem/router----switch.

It matters little in your case I suspect. Since you have multiple jacks you could do modem----jack1---router wan----routerlan -----jack2----switch. This would allow you to place your router in any room and then feed the lan back to the switch that feed the rest of the house.

You do not need a actual managed switch but most POE switches are at least partially managed. 8 ports of POE is going to be a lot of power for a switch to put out. Note I am talking actual PoE 802.3af not one of the proprietary things a lot of AP and camera vendors use.

You may want to consider PoE AP devices in your remote rooms. The main reason to do this because you will likely want a UPS to feed the PoE switch and it will keep the AP active in the event of a power outage without having UPS all over the house

 

[MeatFox]

I would be extremely surprised if you can get 100m out of a 4g signal. It greatly depends on your distance to the cell tower. Even the LTE versions of 4g do not routinely get 100m most are in the 50m range max, they are starting to introduce so called 5g that will get over 100m in real world uses.

In any case you install is always the same. Modem----router----switch.

If your modem is actually a router then you can do modem/router----switch.

It matters little in your case I suspect. Since you have multiple jacks you could do modem----jack1---router wan----routerlan -----jack2----switch. This would allow you to place your router in any room and then feed the lan back to the switch that feed the rest of the house.

You do not need a actual managed switch but most POE switches are at least partially managed. 8 ports of POE is going to be a lot of power for a switch to put out. Note I am talking actual PoE 802.3af not one of the proprietary things a lot of AP and camera vendors use.

You may want to consider PoE AP devices in your remote rooms. The main reason to do this because you will likely want a UPS to feed the PoE switch and it will keep the AP active in the event of a power outage without having UPS all over the house

Thanks a lot for the answer.
The 4g one is really the best option we can get right now so we really don't have a choice there.
I forgot to mention that the NVR is the one who will feed the cameras with power, the switch will only connect to the NVR (as far as i know, i'll dig into it some more) and there will be a UPS that will power them in case something happens.
modem -> routerlan -> switch was exactly what i thought in the first place!