Ifconfig still reports the interface present, and the adapter is still present in System Information. In the crashed state, a ping to my gateway times-out, renewing the DHCP lease fails, the interface fallbacks to self-assigned address and setting a valid manual IP address doesn't bring the link back up. I never managed to copy more than 30Gb at a time without the link going down). The issue is always triggered when large amounts of data are being transferred over the Ethernet link, and affects any Application (it's easy to make the link crash by running a large file copy or a TimeMachine backup. The problems happens with 2 different USB Ethernet devices, one being a USB-C hub, the other one is just a simple Ethernet to USB-A adapter. I recently acquired the latest Apple Silicon MacBook Pro and came across a rather interesting issue.ĭuring a network TimeMachine backup, my Ethernet link stopped working and I was able to reproduce the issue multiple times.