JP5741182B2 - COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a communication device, a communication method, and a program.

  When revising a private network due to the addition of network devices or private network IP (Internet Protocol) address depletion or classification, node devices are isolated from the network due to incomplete network settings and cannot be changed remotely. It was necessary to change the setting of the device directly.

  That is, the setting of each device or node (hereinafter simply referred to as a node) may be reviewed depending on whether a network device or routing is added or changed in an operating network. Some nodes have their settings changed directly from the remote control terminal, while others have their settings changed in a “file format” that records various network settings.

  Conventionally, the configuration file before the router configuration change is stored in a separate storage area, the router configuration is changed, rebooted, a timer for a certain period of time is started after the reboot, and connected from a remote host via the network If the connectivity after the setting change is not harmed by the test, the router timer is stopped by the signal from the remote host via the network, and the connectivity after the setting change is harmed In some cases, due to a timeout of the router timer, the setting is restored to the setting before the setting change stored in another storage area and rebooted (see, for example, Patent Document 1).

JP 2001-251337 A

  However, in either case, there are many devices that are restarted after enabling the settings, and they cannot be accessed from the remote control terminal at all due to a setting error, so the system operator goes to the site, and the correct environment after the change is made I had to set the information. In the case of a large-scale change work, such a lot of work occurred, and a heavy load was imposed on the system operator.

  Therefore, an object of the present invention is to solve the above-described problems, that is, to provide a communication device, a communication method, and a program that can more reliably communicate with a partner.

In order to solve the above-described problem, one aspect of the communication device according to the present invention is a memory that stores a setting value for each protocol when a communication device that communicates with a plurality of protocols is normally connected to another communication device. A means for confirming whether or not the connection with the new setting for each protocol is normal, and a priority of the protocol confirmed that the connection is not normal, and a predetermined priority. If the priority of the protocol is determined to be high and the determination means for determining whether or not the degree of the protocol is high, the stored value when the connection with the other communication apparatus can be normally established is set in the protocol, and the priority If it is determined that the setting is low, the setting unit is configured to record information indicating that setting cannot be performed and to proceed to connection confirmation using the next protocol .

  In addition to the above-described configuration, one aspect of the communication apparatus of the present invention further includes selection means for selecting a protocol for confirming whether the connection is normal by the confirmation means.

Further, according to one aspect of the communication apparatus of the present invention, in addition to the above-described configuration, the determination unit is transiently determined that the connection is not normal due to a connection retry of a protocol that has been confirmed that the connection is not normal. If it is determined that the connection is not normal and the setting means determines that the connection is not transient, the value stored when the protocol having a high priority can be normally connected to another communication device. Is set to the protocol.

In addition, according to one aspect of the communication method of the present invention, in a communication method that communicates with a plurality of protocols, a storage step that stores a setting value for each protocol when a normal connection with another communication apparatus is established, Confirmation step for confirming whether or not the connection with the new communication device is normal, and the priority of the protocol confirmed that the connection is not normal and whether or not the predetermined priority is high If it is determined that the priority of the protocol is high, the stored value when the connection with the other communication apparatus can be normally established is set in the protocol, and the priority is determined to be low. In this case, it includes a setting step of recording information indicating that setting cannot be performed and shifting to connection confirmation using the next protocol .

Furthermore, one aspect of the program of the present invention is a storage step of storing, in a storage unit, a setting value for each protocol when a computer of a communication device that communicates with a plurality of protocols is normally connected to another communication device. A confirmation step for confirming whether or not a connection with a new setting with another communication device is normal for each protocol, and a priority of a protocol confirmed that the connection is not normal, and a predetermined priority is If it is determined that the priority of the protocol is high and the priority of the protocol is high, the stored value when the connection with the other communication device can be normally established is set in the protocol, and the priority is low If it is determined, the information including the setting step of recording information indicating that the setting cannot be performed and shifting to the connection confirmation by the next protocol is performed.

  According to one aspect of the present invention, it is possible to provide a communication device, a communication method, and a program that can more reliably communicate with a partner.

It is a figure which shows the protocol stack of a communication apparatus. 3 is a block diagram illustrating a hardware configuration example of a node 11. FIG. 3 is a block diagram illustrating a configuration of functions realized by executing a program in a node 11. FIG. It is a flowchart explaining the process of protocol determination. It is a flowchart explaining the detail of the process at the time of NG. It is a figure explaining the process of a protocol determination. It is a figure explaining the priority of a protocol. It is a figure explaining the process of a protocol determination.

  Hereinafter, a communication apparatus according to an embodiment of the present invention will be described with reference to FIGS. Here, for simplification, the configuration is shown by taking two nodes as an example.

  FIG. 1 is a diagram illustrating a protocol stack of a communication device. The node 11 is an example of a communication device, and is a node whose protocol settings are changed. Hereinafter, the node 11 is also referred to as a node A.

  The node 12 is a remote control terminal. Hereinafter, the node 12 is also referred to as a node B.

  The node 11 and the node 12 are the Ethernet (registered trademark) 21, IP / ARP (Address Resolution Protocol) / ICMP (Internet Control Message Protocol) / IPsec (Security Architecture for Internet Protocol) 22, TCP (Transmission Control). Protocol) / UDP (User Datagram Protocol) / SCTP (Stream Control Transmission Protocol) 23 and FTP (File Transfer Protocol) / TELNET (Telecommunication network) 24 protocol stack, Ethernet 11 (registered trademark) 31 of node 11, It is connected with each protocol stack of IP / ARP / ICMP / IPsec32, TCP / UDP / SCTP33, and FTP / TELNET34.

  Ethernet (registered trademark) 21 and 31 includes an Ethernet (registered trademark) protocol.

  IP / ARP / ICMP / IPsec 22 and 32 include IP, ARP, ICMP, and IPsec protocols.

  TCP / UDP / SCTP 23 and 33 include TCP, UDP, and SCTP protocols.

  FTP / TELNET 24 and 34 include FTP and TELNET protocols.

  FIG. 2 is a block diagram illustrating a hardware configuration example of the node 11 which is a computer that executes a series of processes described below by a program.

  In a computer, a CPU (Central Processing Unit) 51, a ROM (Read Only Memory) 52, and a RAM (Random Access Memory) 53 are connected to each other by a bus 54.

  An input / output interface 55 is further connected to the bus 54. The input / output interface 55 includes an input unit 56 including a keyboard, a mouse, and a microphone, an output unit 57 including a display and a speaker, a storage unit 58 including a hard disk and a nonvolatile memory 71, and a communication unit 59 including a network interface. A drive 60 for driving a removable medium 61 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is connected.

  In the computer configured as described above, the CPU 51 loads the program stored in the storage unit 58 to the RAM 53 through the input / output interface 55 and the bus 54 and executes the program, for example. Is performed.

  The program executed by the computer (CPU 51) is, for example, a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), etc.), a magneto-optical disk, or a semiconductor. It is recorded on a removable medium 61, which is a package medium composed of a memory or the like, or is provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

  The program can be installed in the computer by installing the removable medium 61 in the drive 60 and storing it in the storage unit 58 via the input / output interface 55. Further, the program can be installed in a computer by being received by the communication unit 59 via a wired or wireless transmission medium and stored in the storage unit 58. In addition, the program can be installed in the computer in advance by storing it in the ROM 52 or the storage unit 58 in advance.

  FIG. 3 is a block diagram showing a configuration of functions realized by executing a program in the node 11 which is a computer. That is, in the node 11, a connection confirmation unit 91, a determination unit 92, a selection unit 93, a setting unit 94, and a storage unit 95 are realized.

  The connection confirmation unit 91 confirms whether the connection with the node 12 is normal for each protocol of Ethernet (registered trademark) to TELNET included in each protocol stack of Ethernet (registered trademark) 21 to FTP / TELNET 24.

  The determination unit 92 determines whether or not the priority of the protocol that has been confirmed that the connection is not normal is high. The determination unit 92 includes an operation determination unit 101, a retry determination unit 102, and a priority determination unit 103. The operation determination unit 101 determines whether operation is possible or impossible with new settings when normality cannot be confirmed by the protocol. The retry determination unit 102 determines whether or not the normality of communication is transient. The priority determination unit 103 determines whether or not the priority of the protocol that has been confirmed that the connection is not normal is high.

  The selection unit 93 selects a protocol by which the connection confirmation unit 91 confirms whether the connection is normal.

  When it is determined that the protocol priority is high, the setting unit 94 sets the stored value when the connection with the node 12 is successful to the protocol. The storage unit 95 stores the setting value for each protocol when the node 12 is normally connected to the nonvolatile memory 71.

  Next, the protocol determination process will be described in detail with reference to the flowcharts of FIGS.

  FIG. 4 is a flowchart for explaining a protocol determination process. In step S11, the selection unit 93 selects ARP as a protocol for confirming whether the connection is normal by the connection confirmation unit 91, and the connection confirmation unit 91 confirms whether the ARP connection with the node 12 is normal. To do. The operation determining unit 101 of the determining unit 92 can determine whether or not the ARP operation can be performed with the new setting according to the result of the confirmation by the connection confirming unit 91 whether the ARP connection with the node 12 is normal. Determine whether.

  If it is determined in step S11 that ARP operation is not possible with the new settings, the procedure proceeds to step S12, and processing for NG is executed. Details of the NG process will be described later with reference to the flowchart of FIG.

  If it is determined in step S11 that the ARP can be operated with the new setting, the procedure proceeds to step S13, and the selection unit 93 uses ICMP as a protocol for confirming whether the connection is normal by the connection confirmation unit 91. The connection confirmation unit 91 confirms whether or not the ICMP connection with the node 12 is normal. The operation determination unit 101 of the determination unit 92 determines whether the ICMP operation is possible or not with a new setting according to the result of the confirmation by the connection confirmation unit 91 whether the ICMP connection with the node 12 is normal. Determine whether.

  If it is determined in step S13 that ICMP operation is not possible with the new settings, the procedure proceeds to step S14, and processing for NG is executed.

  If it is determined in step S13 that ICMP operation is possible with the new settings, the procedure proceeds to step S15, and the selection unit 93 uses IPsec as a protocol for confirming whether the connection is normal by the connection confirmation unit 91. The connection confirmation unit 91 confirms whether the IPsec connection with the node 12 is normal. The operation determination unit 101 of the determination unit 92 can determine whether or not the IPsec operation can be performed with the new setting according to the result of the confirmation by the connection confirmation unit 91 whether the IPsec connection with the node 12 is normal. Determine whether.

  If it is determined in step S15 that IPsec operation is not possible with the new settings, the procedure proceeds to step S16, and processing for NG is executed.

  If it is determined in step S15 that IPsec operation is possible with the new settings, the procedure proceeds to step S17, and the selection unit 93 uses SCTP as a protocol for confirming whether the connection is normal by the connection confirmation unit 91. The connection confirmation unit 91 confirms whether the SCTP connection with the node 12 is normal. The operation determination unit 101 of the determination unit 92 can or cannot operate the SCTP with the new setting according to the result of the confirmation by the connection confirmation unit 91 whether the SCTP connection with the node 12 is normal. Determine whether.

  If it is determined in step S17 that SCTP operation is not possible with the new settings, the procedure proceeds to step S18, and processing for NG is executed.

  If it is determined in step S17 that the SCTP can be operated with the new settings, the procedure proceeds to step S19, and the selection unit 93 uses the connection confirmation unit 91 as a protocol for confirming whether the connection is normal. The connection confirmation unit 91 confirms whether the TCP connection with the node 12 is normal. The operation determination unit 101 of the determination unit 92 can determine whether the TCP operation is possible with the new setting according to the result of the confirmation by the connection confirmation unit 91 whether the TCP connection with the node 12 is normal. Determine whether.

  If it is determined in step S19 that TCP operation is not possible with the new settings, the procedure proceeds to step S20, and processing for NG is executed.

  If it is determined in step S19 that TCP operation is possible with the new settings, the procedure proceeds to step S21, and the selection unit 93 uses FTP as a protocol for confirming whether the connection is normal by the connection confirmation unit 91. The connection confirmation unit 91 confirms whether the FTP connection with the node 12 is normal. The operation determination unit 101 of the determination unit 92 can determine whether or not FTP operation is possible with new settings according to the result of the confirmation by the connection confirmation unit 91 whether the FTP connection with the node 12 is normal. Determine whether.

  If it is determined in step S21 that FTP operation is not possible with the new settings, the procedure proceeds to step S22, and processing for NG is executed.

  If it is determined in step S21 that FTP operation is possible with the new settings, the procedure proceeds to step S23, and the selection unit 93 uses TELNET as a protocol for confirming whether the connection is normal by the connection confirmation unit 91. Then, the connection confirmation unit 91 confirms whether the TELNET connection with the node 12 is normal. The operation determination unit 101 of the determination unit 92 can determine whether the TELNET operation can be performed with the new setting according to the result of the confirmation by the connection confirmation unit 91 whether the TELNET connection with the node 12 is normal. Determine whether.

  If it is determined in step S23 that TELNET operation is not possible with the new settings, the procedure proceeds to step S24, and processing for NG is executed.

  If it is determined in step S23 that the TELNET can be operated with the new settings, the procedure proceeds to step S25, and the storage unit 95 stores all the settings in the nonvolatile memory 71, and the protocol determination process is performed. finish.

  After the procedure in step S44 of NG processing described later, the procedure proceeds to step S26, and the setting unit 94 reads the previous setting from the nonvolatile memory 71 and resets it. That is, the setting unit 94 sets the stored value in the protocol when the node 12 is normally connected.

  In step S27, the node 11 is restarted, and the protocol determination process ends.

  FIG. 5 is a flowchart for explaining details of processing in NG. In step S41, the connection confirmation unit 91 retries the connection with the node 12. In step S42, the retry determination unit 102 of the determination unit 92 determines whether the retry is OK or NG, that is, whether the communication is normal. Determine if it is transient.

  If it is determined in step S42 that the retry is NG, that is, the normality of communication is transient, the procedure proceeds to step S43, and the priority determination unit 103 of the determination unit 92 determines that the connection is not normal. It is determined whether or not the priority of the protocol confirmed as above is high.

  If it is determined in step S43 that the priority of the protocol is high, the procedure proceeds to step S44, and the storage unit 95 logs information of the setting NG (information (log) indicating that the protocol cannot be connected is nonvolatile). Stored in the memory 71), the NG process ends, and the procedure proceeds to step S26 in FIG.

  If it is determined in step S42 that the retry is OK, that is, if the normality of communication is not temporary, the processing at the time of NG is ended, and the procedure is step S13, step S15, step S17 in FIG. Proceed to step S19, step S21, or step S13. That is, in step S12, when the NG process is executed, after step S42, the procedure proceeds to step S13 in FIG. If the NG process is executed in step S14, the procedure proceeds to step S15 in FIG. 4 after step S42. If the NG process is executed in step S16, the procedure proceeds to step S17 in FIG. 4 after step S42.

  Further, when the NG process is executed in step S18, the procedure proceeds to step S19 in FIG. 4 after step S42. If the NG process is executed in step S20, the procedure proceeds to step S21 in FIG. 4 after step S42. If the NG process is executed in step S22, the procedure proceeds to step S23 in FIG. 4 after step S42. If the NG process is executed in step S24, the procedure proceeds to step S25 in FIG. 4 after step S42.

  If it is determined in step S43 that the priority of the protocol is low, the procedure proceeds to step S45, and the storage unit 95 logs information of the setting NG (information (log) indicating that the protocol cannot be connected is nonvolatile). 4 is stored in the memory 71, and the processing at the time of NG is finished, and the procedure is similar to the case where it is determined that the retry is OK in step S42, the procedure is step S13, step S15, step S17, step S19 in FIG. The process proceeds to step S21 or step S13.

  Here, the operation will be described with reference to FIGS. In FIG. 6 to FIG. 8, a circle indicates a normal protocol, and a cross indicates an abnormal protocol. In FIG. 7, a protocol with a star is a protocol with a high priority in advance, and a protocol without a star is a protocol with a low priority in advance. Show.

  In the examples shown in FIGS. 6 to 8, the ARP, ICMP, and IPsec protocols belong to the protocol stack of the lowest layer (lower layer), and TCP, UDP, and SCTP are included in the upper protocol stack. The protocol belongs, and the FTP and Telnet protocols belong to the protocol stack at the highest level.

  As shown in FIG. 6, it is assumed that the node 11 which is the node A is operating normally using the protocol. The node 11, which is the node A, stores the setting in which communication with each node is normally established in the nonvolatile memory 71.

  As shown in FIG. 7, the protocol set in the node 11 that is the node A is prioritized in advance and is stored in the nonvolatile memory 71 of the node 11 that is the node A. Prioritization is a minimum protocol required for control from the node 12 which is a remote control terminal.

  When the setting of the node 11 that is the node A is reviewed due to the network change, the node 11 confirms whether communication can be established in order from the protocol with the highest priority. If communication can be established, the setting is valid without returning to the original setting. If communication of the protocol set to low priority cannot be established, the setting is reviewed by the node 12 which is a remote control terminal.

  The example shown in FIG. 8 is an example in which it is assumed that if the Telnet can be established, the network setting can be changed by inputting a command, and the cross-marked protocol that cannot be established is reviewed.

  When the protocol determination process described with reference to FIG. 4 has made it impossible for the node 11 as the node A to establish communication with a high-priority protocol due to an unmatch of the network settings, the node 11 has been operating normally from the nonvolatile memory 71 last time. Communication is reestablished with the node 12, which is a remote control terminal, by reading the setting and performing autonomous reconfiguration.

  When each protocol check results in NG, the NG process described with reference to FIG. 5 is executed.

  If the protocol check results in NG, the setting check is retried a specified number of times. If retry is NG, the priority setting is confirmed. If the protocol has a high priority, the setting NG information is logged, the current setting is invalidated, and the previous setting is validated.

  If the protocol has a low priority, information on the setting NG is logged and the next protocol check is performed.

  As described above, when network devices such as routers and servers are set up and communication cannot be normally established with each node, it is not necessary for the system operator to visit the site and correct the device settings directly. Further, by returning to the setting in which the node was autonomously operated normally last time, the node is not isolated from the network, and downtime can be minimized.

  Furthermore, if there is no problem with the minimum protocol settings that can be controlled from the remote terminal, the normality of some settings can be confirmed, and it is not necessary to return all settings by reviewing only misconfigured protocols.

  In the above description, a network related to a cellular phone is given as an example. However, the present invention can be applied to a communication network using any protocol. When a logical network is configured not only for each node but also for each functional unit in the node, it can be applied to each functional unit. For example, the present invention can be applied to a node configured by a plurality of functional units (cards and boards), in which IP / MAC is allocated to each functional unit and communicating with each other.

  In this way, network devices such as routers and servers are set up, and when communication with each node cannot be established normally, a protocol that cannot establish communication normally is detected, and the priority of the set protocol is considered and autonomous. In the state where the minimum necessary protocol has been established, the setting is validated, or if communication has been established from the remote control terminal to a protocol that allows setting correction, that state is maintained, and all previous protocols are operating normally. The network settings from the remote control terminal are restored automatically by switching back to the specified settings.

  When normal operation cannot be performed due to the setting after changing the network setting of the node, it is possible to provide a node having a recovery function that automatically returns to the normal network setting and prevents the node from being isolated or remotely controlled.

  Furthermore, it can be applied to any database connection or network connection equipment such as ATM (Automated teller machine) of bank or post office, data network, data network of hospital, etc., network of train, bus, airplane, etc.

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software executes various functions by installing a computer incorporated in dedicated hardware or various programs. For example, it is installed from a program recording medium in a general-purpose personal computer or the like.

  The program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 11 ... Node, 12 ... Node, 51 ... CPU, 52 ... ROM, 53 ... RAM, 58 ... Storage part, 59 ... Communication part, 61 ... Removable media, 71 ... Non-volatile memory, 91 ... Connection confirmation part, 92 ... Determination , 93 ... selection part, 94 ... setting part, 95 ... storage part, 101 ... operation determination part, 102 ... retry determination part, 103 ... priority determination part

Claims (5)

In a communication device that communicates with a plurality of protocols,
Storage means for storing a setting value for each of the above protocols when a normal connection with another communication device is established;
Confirming means for confirming whether the connection with the new setting with the other communication device is normal for each protocol,
A determination means for determining whether the priority of the protocol is confirmed to be not normal, and the predetermined priority is high;
When it is determined that the priority of the protocol is high, the stored value when the connection with the other communication device can be normally performed is set in the protocol, and when it is determined that the priority is low, And a setting unit that records information indicating that setting cannot be performed and shifts to connection confirmation using the next protocol . The communication device according to claim 1,
The communication apparatus further comprising selection means for selecting the protocol for confirming whether the connection is normal by the confirmation means. The communication apparatus according to any one of claims 1 and 2,
The determination means determines whether or not the connection is transient by retrying the connection of the protocol confirmed that the connection is not normal,
If it is determined that the connection is not normal, the setting means, for a protocol having a high priority , stores the value stored when the connection with the other communication device is successful as the protocol. A communication device characterized by setting. In a communication method for communicating with a plurality of protocols,
A storage step for storing a setting value for each of the above-described protocols when a normal connection with another communication apparatus is established;
A confirmation step for confirming whether the connection with the new setting with the other communication device is normal for each protocol;
A determination step for determining whether or not the priority of the protocol confirmed that the connection is not normal and the predetermined priority is high;
When it is determined that the priority of the protocol is high, the stored value when the connection with the other communication device can be normally performed is set in the protocol, and when it is determined that the priority is low, And a setting step of recording information indicating that the setting cannot be made and shifting to a connection confirmation by the next protocol . To a computer of a communication device that communicates with a plurality of protocols,
A storage step of storing in the storage means the setting value for each protocol when the communication device can be normally connected;
A confirmation step for confirming whether the connection with the new setting with the other communication device is normal for each protocol;
A determination step for determining whether or not the priority of the protocol confirmed that the connection is not normal and the predetermined priority is high;
When it is determined that the priority of the protocol is high, the stored value when the connection with the other communication device can be normally performed is set in the protocol, and when it is determined that the priority is low, A program that records information to the effect that settings cannot be made and performs a process including a setting step for shifting to connection confirmation using the next protocol .

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