Privat Network with Fritzbox and 2 more Segments over OpenWRT-Router

Hi all,

i try to learn setting up a network with openWRT. I can't find a complete explanation for routing basics. I got e few book for that topic but not a complete example for trying to understand the network coherences.

Can you please give me a source for some examples to configure a network like my handdrawing?

Every participant should be able to connect to the internet and each other participant in the network!

Thanks
Regards
Sven

then why put them on separate subnets ?

because we need more ip-Adresse in the network

https://openwrt.org/docs/guide-user/base-system/dhcp_configuration#dhcp_pool_for_a_large_network

You do need more than 254 addresses on your network?
Well, then you can do it the way @frollic suggested or choose a 172.x.x.x network where you can have 65.534 addresses.
But i don't know if all available devices (especially IOT) can be set to use such a network.