Thomas, perhaps you can explain what you are referring to with ‘Port based traffic control’?
Switches do port based traffic manage to of most frames.
There are however broadcast frames, ARP processing, and multicast group frames which can load the port irrespective of unicast data going to the specific host.
Creating a separate subnet from the rest of your network with the appropriate helpers and routing protocol support can reduce the above and consequential processing noise from the host (streamer) network stack and processor.