Do you want to do address reservation for a certain device? You can click on that device and to go Config-->Use Fixed IP Address. For switch or EAP, it is under Config-->IP Settings.

@Raldy What do you mean "NOT able to access them through their WEB interfaces when connected to the WAN ports"? Whose WAN ports? What's your network map when you try this? And how many LAN ports on...

What's the model of your router? You can go to Service ->Reboot Schedule to create a rule for your router. If you want to let it reboot when VPN get disconnected, I have no idea.

@kibokura056 Did you update the firmware in this link: https://community.tp-link.com/en/business/forum/topic/266112 ? As I know this firmware supports IPv6 and Inter Vlan routing(maybe?). Not sure...

Do you have 2 groups of AP+Client? To build P2P, you need to make sure AP and station face to each other and have clear line of sight. You can follow the FAQ to troubleshoot:...

EAP is just an access point. In my opinion, all access points don't have DHCP unless they have other working modes that support DHCP. But EAP just has access point mode. To achieve what you want, I...