TP-Link re200 does not working properly with the new NOS power router

Hello all,

Since we changed the NOS router 3.0 to the new power router NOS 4.0, the TP-Link RE200 does not provide fast internet, I have 120 mbps line at home and the TP-Link only gives no more than 10 mbps and there are a lot of times that there is no internet at all.

Any ideas or any suggestion in settings.

Obrigado!