code: def save_ipv4(self, ip4, id_equip, descricao, id_net):
          
          if not is_valid_int_param(id_net):
              raise InvalidParameterError(
                  u'Network identifier is invalid or was not informed.')
  
          if not is_valid_int_param(id_equip):
              raise InvalidParameterError(
                  u'Equipment identifier is invalid or was not informed.')
  
          if ip4 is None or ip4 == "":
              raise InvalidParameterError(u'IP4 is invalid or was not informed.')
  
          ip_map = dict()
          ip_map['id_net'] = id_net
          ip_map['descricao'] = descricao
          ip_map['ip4'] = ip4
          ip_map['id_equip'] = id_equip
  
          url = "ipv4/save/"
  
          code, xml = self.submit({'ip_map': ip_map}, 'POST', url)
  
          return self.response(code, xml)
docs: Save a IP4 and associate with equipment
  
          :param ip4: An IP4 available to save in format x.x.x.x.
          :param id_equip: Equipment identifier. Integer value and greater than zero.
          :param descricao: IP description.
          :param id_net: Network identifier. Integer value and greater than zero.
  
          :return: Dictionary with the following structure:
  
          ::
  
              { ip: { id: <id_ip4>,
              oct1: <oct1>,
              oct2: <oct2>,
              oct3: <oct3>,
              oct4: <oct4>,
              equipamento: [ { all equipamentos related } ] ,
              descricao: <descricao> } }