It seems this product don't support Mac Clone function. I have checked TD-W8970 UI.There's MAC Clone in network settings. http://www.tp-link.com/resources/simulator/TD-W8970_v1/index.htm

It seems this product don't support Mac Clone function. I have checked TD-W8970 UI.There's MAC Clone in network settings. http://www.tp-link.com/resources/simulator/TD-W8970_v1/index.htm

If the previous firmware works fine,you can go back to that firmware temporary. Maybe the new firmware is not compatible in your region.

Is there some large traffic application running when the wireless don't work(Such as downloading,video streaming)? If yes,maybe the router is over loaded. You can try to set bandwidth control and...

How far away are the two routers?If it's a long distance,the wifi signal will decrease a lot while transmit.So the clients under Router2 can't get stable Internet access.If possible,you can connect...

You can check if you have checked the Dial on demand option.If yes,please un-check it and it should not disconnect.