$VAR1 = [
          {
            'ttl' => 1728000
          },
          {
            'keyfile' => '/etc/bind/rndc.key'
          },
          [
            {
              'subnet' => [
                            '192.168.1.0',
                            '255.255.255.0',
                            {
                              'dns_update' => 1
                            },
                            {
                              'domain' => 'net1.example.com'
                            },
                            {
                              'option' => 'routers 192.168.1.1'
                            },
                            {
                              'option' => 'netbios-name-servers 192.168.1.1'
                            },
                            {
                              'option' => 'netbios-node-type 2'
                            },
                            {
                              'ttl' => 1200
                            },
                            {
                              'max_ttl' => 2400
                            },
                            {
                              '192.168.1.4' => {
                                                 'domain_name' => 'pc-4',
                                                 'hostname' => 'pc4'
                                               }
                            },
                            {
                              '192.168.1.5' => {
                                                 'domain_name' => 'pc-5.subnet2',
                                                 'mac' => 'ab:dd:ee:ff:ff:ee'
                                               }
                            },
                            {
                              'ttl' => 259200
                            },
                            {
                              'default' => '<host>-<addr>.unreg.'
                            }
                          ]
            }
          ],
          {
            'bind_server' => '127.0.0.1'
          },
          [
            {
              'subnet' => [
                            '192.168.2.0',
                            '255.255.255.0'
                          ]
            },
            {
              'subnet' => [
                            '192.168.3.0',
                            '255.255.255.0',
                            {
                              'ttl' => 10800
                            },
                            {
                              'default' => '<addr>'
                            }
                          ]
            }
          ]
        ];