Then the official firmware of TP-Link Archer C7 supports neither VLAN tagging or VLAN trunking.
Thus, the VLAN ID 835 which can perfectly establish the Internet connection via PPPoE between the ONT (Optical Network Termination) Orange and TP-Link router Archer C7, can be supported only through the open firmware OpenWRT, but without Support WiFi ac!
The TP-Link Archer C7 is therefore incompatible with the Orange ISP.
To get rid of the Livebox Fibre (2 ZTE, Play, etc.), so I recommend the Asus RT-AC68U buyable on Amazon Germany (sold and shipped by Amazon, natively supports VLAN tagging with official firmware Asuswrt): http : ie = UTF8 & //www.amazon.de/gp/product/B00FL1IFM8/ref=oh_details_o00_s00_i00 psc = 1?