@VinayShekhar 

Hi, may I know who is your ISP? What if you dial up on the computer directly, will the internet work?

How to set up a PPPoE connection on Windows 10

If the above works, that means your username and password form your ISP are correct, please try to do a PPPoE on the C1200:

How do I install TP-Link Archer router to work with a DSL Modem​​​​​​​

@Solla-topee Hi - My ISP is Hathway broadband. It works on my old router just fine. And i have the LAN cable coming directly from the ISP. I mean no modem involved here. What must i do next?

Solla-topee wrote

@VinayShekhar 

 

Hi, may I know who is your ISP? What if you dial up on the computer directly, will the internet work?

How to set up a PPPoE connection on Windows 10

 

If the above works, that means your username and password form your ISP are correct, please try to do a PPPoE on the C1200:

How do I install TP-Link Archer router to work with a DSL Modem

 

@VinayShekhar 

Hi, thanks for your quick reply.

Will you be able to access the internet if you plug the internet cable directly into one of your PCs? If not, we need to confirm this with your ISP just in case they have special binding with the old router.

If you have internet access when plugged that cable into PC directly (whether it is just plug-and-play or you need to dial up on the PC), just adopt the same settings on the C1200 and it should work.

@VinayShekhar Contact your ISP and ask them to reset MAC adress from their end. It is required everytime you change the device connceted their ethernet.