Got ISP to setup the router. He added the mac from TP link. I think there was some issue with cloned MAC.

Okay thanks alot for taking all the pains. ISP is mot helpful at all. Lets hope tplink release some firmware update to resolve this issue.

When i run ping from diagnostic in setting, i am getting response with 0% packet loss. The issue remains same even when using ISP dns i.e when u checked the option.

@terziyski hey thanks for taking time to reply. I did run thise commands and have attached here. I can ping IPs but not domain's. Cant seem to understand the cause of this behaviour. Seems weird to...

@terziyski i made these changes and it made no difference at all. No able to get internet access

Thanks for the info brother but i have checked the post and its not possible for my ISP to configure as he wants me to buy his own modem. I am able to rung ping test via modem and i am getting reply...