I have a 2018 MacBook Pro—retina, no touchbar, 13", two USB-C ports. I have a USB-C 'dock' with HDMI and three USB 3 ports. I want to use hardwired Ethernet to offload the wifi, but I don't want to be manually disabling and enabling wifi.
I bought a j5create USB 3 - 1G/T adapter and plug it into the 'dock.' So it's MacBook to dock to adapter to Ethernet. This works for a while, but sooner or later all network traffic slows and stops. The assigned IP addresses are different. My older Macs with built-in Ethernet never have this problem. Any suggestions?