MANAGER BANDTHWITH

Hello all

I have a Mikrotik RB433AH with a wan interface, LAN interface and WLAN interface,
I would like to make QOS and QOS that I want when my user surpassed the bandwidth defined
by uphill and downhill, it soon descends on the bandwidth configured for him.

For example each of my machine does not have surpassed 256 and 256 mounted in the downhill,
if my machine is waiting for the flow already, it should be immediately and return Shappe Up to 256 by example 128K

as then I can do that is what I have to use the queue PCQ?