Here are the 2 screenshots : VLAN -> VLAN When editing the VLAN 100, you can not choose a WAN assigned port (grayed out) VLAN -> Ports

I've no problem to change the IP addrress for the first NTP Server, and clicking save. I've just made sure my copy/paste doesn't include any space.

Model : Hardware Version : Firmware Version : ISP : Hi I've set up a TL-R470T+ with 2 WAN Connections. The WAN1 connected ISP offers IPTV service using VLAN 100 between its main router/modem box and...