@TP-Link I do only want to use Internet on the second port, but I saw on the screenshots on the page you sent that it says you can only use the second port for IPTV. If that is no longer the case, I...

@TP-Link Thanks but this doesn't fix the problem - the issue is that I can't configure it on the main Deco, which means there are no fully-hardwired connections available anywhere else on my network....

My ISP uses VLAN tagging to discriminate the internet service from IPTV. Currently when setting up the Deco, if you use VLAN tagging on the WAN port, you cannot use the other port for the network....