Speed Management

I'm using the merlin FW on the RTN16, just wondering is it possible to manage what speeds different ports can use?
For example, if one has 10Mpbs internet, can LAN1 be set at full speed, and LAN2/WiFi be set at max 5Mbps ( also the upload ).

I'm using QoS at the moment, but not sure if its achievable somehow with that. ( would still like to configure priority for certain ports )


thanks!