def host_network
      return nil unless network_name =~ /^HostInterfaceNetworking-(.+?)$/

      parent.host.network_interfaces.detect do |i|
        i.interface_type == :host_only && i.name == $1.to_s
      end
    end
def host_network
      return nil unless network_name =~ /^HostInterfaceNetworking-(.+?)$/

      parent.host.network_interfaces.detect do |i|
        i.interface_type == :host_only && i.name == $1.to_s
      end
    end
Returns the host network associated with this DHCP server, if it
 exists.