network:
  version: 2
  renderer: networkd
  ethernets:
    addresses: [ "2001:cafe:face:beef::dead:dead/64" ]
    routes:
      - to: "2001:cafe:face::1/128"
        scope: link
      - to: "::/0"
        via: "2001:cafe:face::1"
        on-link: true