Review on VTOP USB 3.0 to Dual Port Gigabit Ethernet RJ45 NIC Adapter with USB Port - Expand Laptop/Desktop Connectivity with Two Networks and USB 3.0 Device (Black) by David Fisher

I bought this adapter a while back and just recently started setting up a Raspberry Pi based router. It looks so nice when booting up, but after 2 minutes the second port starts to "flicker", disconnecting and later reconnecting to the device connected to it. Port as disconnected from the USB host (the adapter uses a connection to the USB host) so I don't really know what to make of it. The first port (eth0) is stable and working as expected, but mine expects two ports to be fully functional, which is not the case. Reading the comments of other buyers, it seems that they have had similar problems. Unfortunately, I only became aware of this problem recently after the return deadline had passed.