Hi, is there any reason you specifically want a mesh system, could you not go with a router and maybe UniFi WAPs.
As for the need or not for tagging, no its not required, hence some ISPs do without it, however without it some applications like VOIP may not be able to access q priority. That there are few downsides to not having it.
I have a big house with WiFi dead spots - are there better options than Mesh?
If it's of any help, I have Orbi AC3000 kit in a largish two story house using an ISP who require tagging. Works just fine and I have removed the ISP supplied router from the mix.
Thanks heaps - what does removing the ISP router do? And is this only possible if landline is not required?
I'm assuming you have fibre. The landline will be fed directly from the ONT to the phone, or as in our case (where my other half insists she still needs one...) into the existing house copper cabling, so the other landline phones in the house still also work. Removing the ISP provided router is in some ways neither here nor there, although there are other threads on here where people have advised that some third party devices do not perform as well as ISP supplied routers on higher bandwidth connections, so be mindful of that. We are only 100/20 and the Orbi performs fine in that setup.