Just curious, and I can’t find any documents about it. Instances can use it to connect to internet, so it must use a nic to send packets. If a pc has more than one nic connect to internet, then which one will incusbr0 chooses? Can we manually config incusbr0 to use specific one?
The traffic is routed and NATed through the host, so it goes out of whatever network interface is used for your host’s traffic.