Comment 1 for bug 1763608

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Mathieu Trudel-Lapierre (cyphermox) wrote :

Indeed; but this is meant to be that way -- there is no usefulness in having a network device listed in the file without any configuration, as you can always just do "ip link set $device up" to bring it up.

If there is no configuration, the device is left alone, as it should be.

If you must have an interface brought up but with no addresses, you may wish to also set:

dhcp4: off
dhcp6: off

These should force netplan to write out extra systemd configuration to disable DHCP, the new files present for systemd may help bringing up the interface.