Comment 3 for bug 1758820

I have "Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-29-generic x86_64)" with all upgrades.

I tried /etc/netplan/50-cloud-init.yaml

network:
    version: 2
    renderer: networkd
    ethernets:
        lan:
            match:
               macaddress: 00:50:56:a8:29:e8
            set-name: lan
            addresses:
            - 10.10.0.48/24
            - 1701:5740:5000:3301::48/64

It looks good now.

Regards
Thomas