I have the setup as specified in the picture below: As Soon as I connect Port 1 to the ISP I cannot manage the switch, the TP-link easy smart configuration tool does not even detect the witch. I used

I have fiber to the home. The ISP Ethernet carries IPTV on VLAN ID 4 and Internet. I configured the Switch as follows: Port 1 : VLAN ID 2 (untagged) Connected to : Internet Service Provider VLAN ID 4

I put the TP-Link between the ISP Ethernet port and my router, this because I want to split the IPTV before it's going into the router. Port 1 is connected to the ISP Ethernet port (Internet and IPTV)

Router is configured for DHCP on VLAN ID 100 on port 15 which is connected to Switch 2 port 15. I assume I need to configure port 15 as tagged with PVID 100 and should be combined with port 13 what sh