{
  # host declaration with flexible identifiers config
  # subnet4 declaration
  /// This configuration declares some subnets but has no interfaces-config
  /// Reference Kea #245
  "Dhcp4": {
    "subnet4": [
      {
        "id": 1,
        "subnet": "10.5.5.0/27",
        "pools": [
          {
            "pool": "10.5.5.5 - 10.5.5.10"
          }
        ]
      },
      {
        "id": 2,
        "subnet": "10.10.10.0/27"
      }
    ],
    "option-def": [
      # option definition
      {
        "space": "dhcp4",
        "name": "my-id",
        "code": 250,
        "type": "string"
      }
    ],
    "host-reservation-identifiers": [
      "flex-id",
      "hw-address"
    ],
    /// The flexible host identifier is a premium feature
    "hooks-libraries": [
      {
        "library": "/path/libdhcp_flex_id.so",
        "parameters": {
          "identifier-expression": "option[250].hex"
        }
      }
    ],
    "reservation-mode": "global",
    "reservations": [
      # host declarations
      {
        "hostname": "test1",
        "flex-id": "'test1'",
        "option-data": [
          {
            "space": "dhcp4",
            "name": "domain-search",
            "code": 119,
//          "original-data": "\"example.com\", \"example.org\"",
            "data": "example.com, example.org"
          }
        ],
//      /// default-valid-lifetime in unsupported scope
//      "valid-lifetime": 1800,
        "ip-address": "10.5.5.1"
//      "extra-ip-addresses": [
//        "10.10.10.10"
//      ]
      },
      {
        "hostname": "test2",
        "hw-address": "00:07:0e:36:48:19",
        "ip-address": "10.5.5.2"
      }
//    {
//      "hostname": "test3",
//      "hw-address": "fddi 00:07:0e:36:48:19",
//      "ip-address": "10.10.10.1"
//    }
    ]
  }
}