I used in the L5 the app nm-connection-editor and went through the configuration of the Ethernet connection which I just renamed from “Wired connection 1” to the name “usb0”. I can assign in the tab for IPv4 manually an addr, what I did as 10.0.1.1 netmask 255.255.255.0, which is visible afterwards with ip addr in that interface when USB-C connects the laptop.
I found no way to set with the app an option DHCP server. I can only configure that the IP for usb0 should fetched by DHCP (which I did not), an consequently the interface ue0 in the laptop remains without any IP addr on:
# dhclient ue0
DHCPDISCOVER on ue0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on ue0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on ue0 to 255.255.255.255 port 67 interval 7
...
@dos, please advice how to set DHCP server, best with a screenshot. Thanks.