Frodo's USB NIC

# 10.20.30.x restore
# Frodo  : profile=shared-eth  ip=10.20.30.2/24
sudo nmcli con mod shared-eth ipv4.method manual ipv4.addresses 10.20.30.2/24 && sudo nmcli con down shared-eth && sudo nmcli con up shared-eth

# Camelot: profile=camelot     ip=10.20.30.1/24
nmcli dev status
sudo nmcli con mod camelot connection.interface-name <ethernet-device> ipv4.method manual ipv4.addresses 10.20.30.1/24 ipv4.gateway ""
sudo nmcli con down "Wired connection 1" ; sudo nmcli con up camelot

nmcli

Hmmmm