Comment 1 for bug 2055333

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Lukas Märdian (slyon) wrote :

This is probably related to the permanentMAC address matching, which was invalid and got dropped in newer version of Netplan, as MAC address matching is not supposed to be used on virtual interfaces (such as the Loopback interface).

Could you please try removing the "match. macaddress: 00:00:00:00:00:00" setting (and "set-name: lo"). That way it should match on the "lo" interface automatically and IP addresses should be assigned.

In the future, you might be able to use "dummy-devices" in Netplan, instead of "lo".