@TomDuncan As I explained, with your setup you do not have access to DNS server on Guest network. It is easy to verify. From device connected to Guest network pinging 8.8.8.8 should be successful,...

@DuckieHo 1. These two networks are getting IP addresses from the same DHCP pool of IP addresses set on your router, and as far as router concerned all devices on both networks look the same to...

@elaeroplano 1. Connect Macbook Pro directly by Ethernet cable to Starlink router, bypassing Deco, and see if problem still exists. If it does, it is Starlink issue. Google "satellite based internet"...

@TomDuncan I think you meant to say you are running pihole DNS server. I am also going to guess it is wired, and that makes it part of Deco Main network. Deco Guest and Main networks are isolated,...

@MelbourneMaker I am going to leave troubleshooting to TP-Link senior engineers, now that they are involved. When they find where the problem is, I'll appreciate you posting their findings here....

@Thackers Thackers wrote So to clarify. 1. Leave virgin router in router mode but turn off wifi. 2. Hard Wire all decos after my cisco network switch in various rooms in house. 3. Set each deco to...