Unable to connect to Internet after rebooting router that is used to create a seperate Wifi Network
Hello! I'm experiencing a problem with my home network setup. I have two Wi-Fi routers connected to each other. The primary router is connected to the internet via DSL and is used for my main home network. The second router (The Archer C80), is connected to one of the LAN ports of the primary router. It is intended to create a separate Wi-Fi network for my smart home devices. Initially, this setup worked well, but recently, the secondary Wi-Fi network has started to crash regularly after rebooting the rooter.
The network still appears in my list of available networks and I can join it but it seems to be unable to access the internet (Can't remotely connect to the home assistant instance that's running on the network and I get a warning that I have no internet connection on my mac as soon as i join). Sometimes, after rebooting both routers multiple times, the secondary network starts working again, but the issue persists. As soon as the problem occurs I am also unable to access the admin page of the router (neither tplinkwifi.net nor the ip adress works). What's really strange is, that I am still able to access the router via the cloud functionality of the tether app where it says that the router is connected to the internet.
I really don't know what's going on and have no idea how to fix this issue. I factory reset the router several times, both routers are running the latest firmware, I tried another cable and a different LAN port.
I gave the secondary router a static IP on my primary router and configured the Gateway and DNS to be the IP of the primary router. I also configured different DHCP Ranges.
I'd be really glad if someone could help me out here! Thanks in advance!