{
  # preferred lifetime
  /// This configuration declares some subnets but has no interfaces-config
  /// Reference Kea #245
  "Dhcp6": {
    "preferred-lifetime": 1200,
    "renew-timer": 600,
    "rebind-timer": 960,
    "subnet6": [
      # embedded in pool
      {
        "id": 1,
        "subnet": "2001::/64",
        "preferred-lifetime": 1800,
        "renew-timer": 900,
        "rebind-timer": 1440,
//      /// preferred-lifetime moved from an internal pool scope
//      /// Avoid to overwrite current value...
//      "preferred-lifetime": 2400,
//      "renew-timer": 1200,
//      "rebind-timer": 1920,
        "pools": [
          {
            "pool": "2001::1000 - 2001::1fff"
          }
        ]
      }
    ]
  }
}