QoS is not activated in Host router. checked with another router and directly connected to laptop. Host router is working as expected. In TPlink C50 also Extender mode works at 40Mbps, Access point...

I am accessing via TP link WIFI. I have configured C50 router in access point mode via LAN. My main router has 40Mbps limit. But TP link shows 18 mbps when speed tested. When i configure C50 in Range...