This advice helped me: https://community.tpg.com.au/t5/Broadband-Internet/Alternate-router-to-use-on-HFC/td-p/863   Essentially you need to go to Network -> IPTV settings. Select Custom mode there and assign VLAN ID 2 to the Internet (Remaining IDs can be 3 and 4). And tick 802.1Q Tag checkbox.   After this it all works well.   ... View more