@MR.S I also have manged switch which has ports free, running default configuration.

@MR.S Yes, i set vlan id 30 on network card settings and then set ip address as automatically. Then router will assign vlan ip.

@MR.S If switch is the issue, wouldn't same issue happens to the laptop too, but how come it is getting vlan ip. I connected laptop to lan port in wall and that lan coming from switch in my floor.

@MR.S Yeah, same way i did

@MR.S Actually connection from router is going to vlan aware unmanaged cisco switch sg94-24t. And only port 4 is using. Connection between router and switch is port 4.port 5 and port 3 are free. No...

@MR.S Also attaching unifi controller setup Check below one also