I am also facing the same issue but have still found a solution. My modem is XC 220 G3V. If you found any solution do share with others too.

Hello i have recently bought a tplink XC 220 g3v router and it has been working properly since installation but recently i had asked my ISP for IPV6 which they enabled from their backend but my...

@tp_gandhar may seem stupid but try changing the ethernet cord or try using lan 2 using same cord to check if it works?

@tp_gandhar do a full reset of the router after removing the optic cable .

I have installed v .1.13 and have not faced any issues but before updating to v1.13 do install v 1.12 which will be there in the zip file.

Yeah finally, but i couldn't understand why didn't it work when i cloned the mac address of previously working isp modem