I recently purchased an AC1900 router. After setting up the router with the PPPOE connection it gives me that the setup failed. I contacted my ISP and they assured me that nothing is wrong from their end. I get the error "cannot connect to PPPOE server" and when I go into the internet settings of the router, All the IP, MAC, DNS are set to 0.0.0.0  and no matter where i change it, it stays the same. The username and password entered for the PPPOE are 100% correct. Did this happen to anyone? and can anyone please help?