Security experts all over the industry and internet suggest separating your iot devices from your main network! Even the FBI has posted warnings and suggestions for the same thing! The main reason for sperating iot from your main network is in case of a security breach, the rest of your network is protected. I have looked long and hard on most major ac Asus routers and Non have VLAN support, except the business models. This is the one feature that could be very useful if implamented. I hope that Asus will implement this feature on their routers as I have a GT-ac5300 and a RT-ac68u in AI mesh setup with plenty of iot devices.