@TP-Link So... I got into the wifi settings to change the security for the guest network. I saw the "Isolated from the main network" turned on. Now I thought since there is no VLAN this does not make...

@olangbrg All Ethernet cables connected: The switches are simple not managed. The Decos are on ethernet backhaul

@TP-Link I am using my ISP router at 192.168.1.1. There is no VLAN setting on it. I use the Deco m5 as access points. My phone ip on the regular wifi network is 192.168.1.177 On the guest wifi...

I have 3 Deco m5 running as AP. The guest wifi allows to connct but there is no internet on that network.