This is my setup: Two Macs (M1 2020, Mini 2018), connected with a Thunderbolt 3 cable. When both are running Big Sur, they have a working IP connection.
However, if I boot the M1 Mac into Recover Mode, it connects to the network only via Wi-Fi, but not over the TB3 connection.
When I enter Terminal on the M1,
ifconfig lists many interfaces, but I can't tell if the TB interface is amoung them. Clearly, it shows no IPv4 address for any but the Wi-Fi interface, though.
What commands do I have to enter to enable the IP-over-TB interface and get it up so that I can connect the Macs via this faster connection?