version: 2
ethernets:
  ens3:
%{ if fixed_address != "" }
    dhcp4: false
    addresses:
      - "${fixed_address}"
%{ else }
    dhcp4: true
%{ endif }
    dhcp4: true
    routes:
    - to: 0.0.0.0/0
      via: 192.168.30.1