Hello, I recently had a new switch, model TL-SG108 installed and since then have been having high latency issues. The ping seems to be very unstable and constantly spiking over 50 ms sometimes to 100+ ms. Here are some test results:

Here a graph from a different site to see the ping fluctuation:

Running the trace route command hints that there is a problem somewhere in or after the switch:

 I'm not sure if there could also be an issue at the ISP's side but I don't see any reason for a 20-30 ms delay on the way from the switch to what I believe to be the modem (or the transmitter?, not sure exactly, either way something local still connected via Ethernet cable)

I welcome any information on where that latency could be coming from or possibly how to fix it. I thought it could be the switch settings but this model is unmanageable. The only other thing that changed along with the switch was some sort of signal amplifier on the cable from the wireless receiver on the roof which had burnt down before. I don't think that could cause any issues here but it's extra information :)