code: def remove_connection(self, id_interface, back_or_front):
          
  
          msg_err = u'Parameter %s is invalid. Value: %s.'
  
          if not is_valid_0_1(back_or_front):
              raise InvalidParameterError(
                  msg_err %
                  ('back_or_front', back_or_front))
  
          if not is_valid_int_param(id_interface):
              raise InvalidParameterError(
                  msg_err %
                  ('id_interface', id_interface))
  
          url = 'interface/%s/%s/' % (str(id_interface), str(back_or_front))
  
          code, xml = self.submit(None, 'DELETE', url)
  
          return self.response(code, xml)
docs: Remove a connection between two interfaces
  
          :param id_interface: One side of relation
          :param back_or_front: This side of relation is back(0) or front(1)
  
          :return: None
  
          :raise InterfaceInvalidBackFrontError: Front or Back of interfaces not match to remove connection
          :raise InvalidParameterError: Interface id or back or front indicator is none or invalid.
          :raise DataBaseError: Networkapi failed to access the database.
          :raise XMLError: Networkapi failed to generate the XML response.