Thanks Peter, but: I tried using a TPLink AC2100 modem-router, then an ASUS RT-AX56U router but both failed, apparently because they did not have VLAN tagging capability. I called Tech support but they could not or would not provide me with any alternative names/models of workable [modem] routers, but it seems that if the VLAN ID is the issue then any with that option should work. What confuses me is why TPG provides a modem-router if a router will work alone. Is the modem unnecessary? So, what I'm narrowed down to is getting names of example routers that have been known to work. ... View more