def update_security_group_on_port(self, context, id, port,
                                      original_port, updated_port):
        """Update security groups on port.

        This method returns a flag which indicates request notification
        is required and does not perform notification itself.
        It is because another changes for the port may require notification.
        """
        need_notify = False
        port_updates = port['port']
        if (ext_sg.SECURITYGROUPS in port_updates and
            not utils.compare_elements(
                original_port.get(ext_sg.SECURITYGROUPS),
                port_updates[ext_sg.SECURITYGROUPS])):
            # delete the port binding and read it with the new rules
            port_updates[ext_sg.SECURITYGROUPS] = (
                self._get_security_groups_on_port(context, port))
            self._delete_port_security_group_bindings(context, id)
            self._process_port_create_security_group(
                context,
                updated_port,
                port_updates[ext_sg.SECURITYGROUPS])
            need_notify = True
        else:
            updated_port[ext_sg.SECURITYGROUPS] = (
                original_port[ext_sg.SECURITYGROUPS])
        return need_notify

    def update_port(self, context, port_id, port):
        original_port = self.get_port(context, port_id)
        session = context.session
        port_updated = False
        with session.begin(subtransactions=True):
            # delete the port binding and read it with the new rules
            if ext_sg.SECURITYGROUPS in port['port']:
                port['port'][ext_sg.SECURITYGROUPS] = (
                    self._get_security_groups_on_port(context, port))
                self._delete_port_security_group_bindings(context, port_id)
                # process_port_create_security_group also needs port id
                port['port']['id'] = port_id
                self._process_port_create_security_group(
                    context,
                    port['port'],
                    port['port'][ext_sg.SECURITYGROUPS])
                port_updated = True

            port = super(BrocadePluginV2, self).update_port(
                context, port_id, port)

        if original_port['admin_state_up'] != port['admin_state_up']:
            port_updated = True

        if (original_port['fixed_ips'] != port['fixed_ips'] or
            not utils.compare_elements(
                original_port.get(ext_sg.SECURITYGROUPS),
                port.get(ext_sg.SECURITYGROUPS))):
            self.notifier.security_groups_member_updated(
                context, port.get(ext_sg.SECURITYGROUPS))

        if port_updated:
            self._notify_port_updated(context, port)

        return self._extend_port_dict_binding(context, port)

 def check_and_notify_security_group_member_changed(self, context, original_port, updated_port):
     sg_change = not utils.compare_elements(
         original_port.get(ext_sg.SECURITYGROUPS), updated_port.get(ext_sg.SECURITYGROUPS)
     )
     if sg_change:
         self.notify_security_groups_member_updated_bulk(context, [original_port, updated_port])
     elif original_port["fixed_ips"] != updated_port["fixed_ips"]:
         self.notify_security_groups_member_updated(context, updated_port)

    def is_security_group_member_updated(self, context, original_port, updated_port):
        """Check security group member updated or not.

        This method returns a flag which indicates request notification
        is required and does not perform notification itself.
        It is because another changes for the port may require notification.
        """
        need_notify = False
        if original_port["fixed_ips"] != updated_port["fixed_ips"] or not utils.compare_elements(
            original_port.get(ext_sg.SECURITYGROUPS), updated_port.get(ext_sg.SECURITYGROUPS)
        ):
            need_notify = True
        return need_notify

    def is_address_pairs_attribute_updated(self, port, update_attrs):
        """Check if the address pairs attribute is being updated.

        This method returns a flag which indicates whether there is an update
        and therefore a port update notification should be sent to agents or
        third party controllers.
        """
        new_pairs = update_attrs.get(addr_pair.ADDRESS_PAIRS)
        if new_pairs and not utils.compare_elements(
            port.get(addr_pair.ADDRESS_PAIRS), new_pairs):
            return True
        # Missing or unchanged address pairs in attributes mean no update
        return False