Netgear XS508 and GS110MX causing power outage

Hello schumaku , I agree with your statement in the end, this is what is happening somewhere in the system.

The odd thing is that it is happening on either of the two switches independently. Meaning if I disconnection them from the network and set them up for a 1:1 test

GS110MX -> Marvell® AQtion AQC107 or HP USB-C Dock G5

XS508M -> Marvell® AQtion AQC107 or HP USB-C Dock G5

Again the behaviour is the same, and I tested this with different power outlets that are not shared between any appliances. The mathematical chances of having two different models with the exact same AC issue just seems to be so very unlikely to me.

Just some additional thoughts about this problem:

1. If it is an AC issue, why is the connection with the HP EliteBook 840 G6 Ethernet port working? (Also all the other devices that are currently connected over the switches?) If so there must be a difference in power being drawn, but that does not make sense with 3.

2. Why is the AC issue occurring on every port also ports that are working fine with other devices?

3. Why is the AC issue occurring if I plugin these network cards over the router and they just share the same network but the Ethernet ports of the switches remain untouched?

In my heart, this really feels like a incompatibility issue, somewhere during the initialization of these network cards there must be a wrong package or a wrong byte being transmitted somewhere that causes the AC issues. The hole issue is beyond bizarre for me.

Also a thing I observed is that all the network ports display both green LED’s before the power goes out just for a split second, even the ones that are empty.

Or is it a power drawing issue? I use cat 7 cables with cat6 rj45 jacks, one cable is already 20m in the network, the one I am adding is 10m. is this drawing more power from the network then other cables types length’s? But they again why should it malfunction if I only have one cable connected for the test, so probably not.

I have now also contacted my reseller and the official Netgear support team. I will keep you updated about my progress.