GS316EP Traffic Management problem - Switch limits throughput after a time automatically

Good catch ...

Isolating the problem is always agood idea and something I try first.

I have already tried some troubleshooting, but I have not posted what I have tried - sorry for that, maybe I should have posted my troubleshooting steps with the first post.

I tried to keep a long story short otherwise the post would have been a very long letter.

I have two Laptops for "mobile" troubleshooting, that I can use.

One is a Mac the other one is Windows 10 based.

Both have Gigabit Ethernet. 

Before the switch on the first floor turned out to be the problem bear, I tried the following:

1.  Tried to do performance tests (both Laptops) with 2m cables with the switch located in the cellar

     > full throughput

2.  Tried the same with the switch on the 1st floor

     > limited throughput

I tried different cables to rule out a faulty cable.

3. Reboot the cellar switch and re-test the switch on the first floor (Perf Test Number 2)

    > nothing changed

4. Reboot the switch on the first floor and re-test the switch on the first floor (Perf Test Number 2)

     > full throughput  

I then tried to find a setting on the switch on the 1st floor that could trigger the behavior.
Since I couldn't find anything, I asked in the forum (initial post).

thx

mic