I am located in Australia and my ISP is TPG and my house is connected to the NBN via HFC. They use PPPoE and VLAN for these connections and I am having no luck at all with TPG to assist me. I have an old modem connected and it is working fine. I have also seen reviews from the same device from the store purchased the device from that mentioned the same issues with the same ISP.
Are there known issues with this setup? Anything I'm missing or could try?