Right now, I'm using the old Google wifi mesh pucks with Ethernet backhaul for my home wifi and routing. I'm wanting to update my router. I'll probably go to the new nest wifi pro since it will be able to handle the smart home Matter stuff as individual hubs. And I don't want to spend hundreds or thousands wiring Unifi APs with Unifi switches, which would probably be my 2nd choice. The new nest wifi pro is not backwards compatible, so it's going to be like putting in a new router.
My question is regarding all my current LAN settings. I have PoE switches, static IPs, hardwired cameras, 3 servers (UNRAID, Blue Iris, Home Assistant), a DNS Server, etc all using the current subnet. No VLANs or VPNs.
When I swap out the router, what happens with these devices? Do they get assigned new IPs automatically? Do they hold their settings and the new router picks them up and begins using the existing subnet? I'm assuming I will have to manually add the DNS settings and probably which addresses should be static. I just don't want to go through all the trouble of reconfiguring all the ip addresses for the various softwares and servers and dockers. It'll be a fucking nightmare. I won't know where to begin.
I just don't know how all the existing hardware and LAN settings migrate (or don't) when introducing new routing hardware.