@David-TP , No, i did not setup static IP in Windows PC. I tried multiple PC, same issue. Later, i tried to set static IP in one of PC within DHCP range, but also unable to connect internet from that...

I just setup new BE25, 3 packs. The main BE25 connection to router from ISP(Unifi). The main router act as DHCP server to provide IPs to all clients, include phones, PC, etc. All clients can go...