Yesterday it happened again. My son complained that because of his brother he couldn't do anything. I checked with him and the internet speed was very bad for him.

My other son just started up his PC and stated that the network choke could be caused by hir Epic game launcher starting up and downloading stuff.

I have a theory about what happens: The complaining son is connected to the first switch in the cascade of switches, while the other is on the last one. Could it be that QOS works, but give the traffic between switchs priority over other network traffic? Which could explain that one son's network traffic gets priority over the other.

For the time being we installed netlimiter to reduce the bandwidth consumption for epicgamelauncher.

Still looking for a solution to balance network traffic without reducing the speed for connections.