JP2011120171A - Network monitoring apparatus, network monitoring system, and method of confirming connection of device to be monitored in network monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network monitoring apparatus capable of reducing health checks required for connection confirmation. <P>SOLUTION: The present invention relates to a network monitoring apparatus 10 for confirming connection of a plurality of devices 20 to be monitored, comprising: a neighborhood information request part 101 for requesting neighborhood information representing another neighboring device 20 to be monitored from a device 20 to be monitored; a neighborhood information-receiving part 102 for receiving the neighborhood information transmitted from the device 20 to be monitored; a neighborhood information-analyzing part 103 for referring to a monitor network table 105 representing whether or not the device 20 to be monitored is connected, and analyzing the received neighborhood information to detect a change in the presence/absence of the device 20 to be monitored; a monitor information-updating part 104 for updating the monitor network table 105 on the basis of a result of the detection; and a health check part 106 for performing a health check while limiting a target to the neighboring device to be monitored. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a network monitoring device that performs connection confirmation of a plurality of monitoring target devices, a network monitoring system, and a connection confirmation method for monitoring target devices in the network monitoring system.

  In early network monitoring systems, it was only necessary to support relatively small networks. However, as the number of monitored devices increases with the times and the network scale increases, notifications from the monitored devices become the bandwidth of the monitored network. Has come to oppress.

  In a connectionless management system, data collision on the network cannot be avoided. Therefore, when the monitoring network becomes large, it has been generally practiced to divide the monitoring network. However, there are many requests from users to monitor all monitored devices with a single network monitoring device, and in a large-scale monitoring network, there is no influence on the monitoring equipment already installed. There has been a demand for a method of reducing the load and maintaining the reliability.

  In addition, there are other Patent Documents 1 to 3 that disclose the background art according to the present invention.

JP 2005-157486 A JP 2006-270556 A JP 2009-89109 A

  In general, in a system for monitoring devices, a network monitoring device performs a health check at a certain period in order to update the connection status of each monitoring target device. At that time, since the number of devices to be monitored increases as the size of the monitoring system increases, the time allotted for the connection confirmation of each device inevitably decreases, and a connection state mismatch between the network monitoring device and the monitoring target device occurs. The time during which the operation is performed becomes longer (time T in FIG. 21).

  Further, in the monitoring system in which the network monitoring device 100 and the plurality of monitoring target devices 200 are connected as shown in FIGS. 22 and 23, health check data between the network monitoring device 100 and the monitoring target device 200 (# 2) Health check data between the network monitoring device 100 and the monitoring target device 200 (# 3) always passes through the monitoring target device 200 (# 1). Therefore, the bandwidth between the network monitoring device 100 and the monitoring target device 200 (# 1) is shared by the monitoring target devices 200 (# 1) to (# 3).

  In such a case, if the data amount between the network monitoring device 100 and each monitoring target device 200 is not limited, data overflow occurs between the network monitoring device 100 and the monitoring target device 200 (# 1) sharing the bandwidth. However, data loss is likely to occur.

  The present invention has been made in view of the above circumstances, and provides a network monitoring device, a network monitoring system, and a connection confirmation method for a monitoring target device in the network monitoring system, which can reduce the health check necessary for connection confirmation. The purpose is to provide.

  The present invention is a network monitoring device that performs connection confirmation of a plurality of monitoring target devices, an adjacent information requesting unit that requests the monitoring target device for adjacent information representing another adjacent monitoring target device, and the monitoring target An adjacent information receiving unit that receives the adjacent information transmitted from a device and a monitoring network table that indicates whether the monitored device is connected or not is analyzed, and the received adjacent information is analyzed for the presence or absence of the monitored device. An adjacent information analysis unit that detects a change; a monitoring information update unit that updates the monitoring network table based on the detection result; and a health check unit that performs a health check by limiting a target to the adjacent monitoring target devices; It is characterized by providing.

  ADVANTAGE OF THE INVENTION According to this invention, the presence or absence of the connection between several monitoring object apparatuses can be detected based on the adjacent information transmitted from several monitoring object apparatus. Therefore, if the health check is performed between the own device and the adjacent monitoring target device, it is possible to confirm the connection of the plurality of monitoring target devices. Therefore, it is possible to reduce the health check required for connection confirmation, and to realize effective use of bandwidth and efficient device monitoring.

It is a block diagram which shows the structure of one Embodiment of this invention. It is a block diagram which shows the example of a connection of the network monitoring system of FIG. It is a block diagram which shows the other example of a connection of the network monitoring system of FIG. It is a figure which shows the specific example of the monitoring network table 105 of FIG. It is a figure which shows the other specific example of the monitoring network table 105 of FIG. It is a figure for demonstrating the operation example of the network monitoring system of FIG. It is a figure for demonstrating the operation example of the network monitoring system of FIG. It is a figure for demonstrating the operation example of the network monitoring system of FIG. It is a figure for demonstrating the operation example of the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure for demonstrating operation | movement of the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure for demonstrating operation | movement of the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows the monitoring sequence in the network monitoring system of FIG. It is a figure which shows an example of the state synchronous sequence of the background art of this invention. It is a figure for demonstrating the operation example of the monitoring system of the background art of this invention. It is a figure for demonstrating the other operation example of the monitoring system of the background art of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of a network monitoring system according to the present invention. The network monitoring system 1 in FIG. 1 includes a plurality of monitoring target devices 20 (however, only one is shown in FIG. 1) and a network monitoring device 10 that confirms connection of the plurality of monitoring target devices 20. In this case, the network monitoring device 10 and the monitoring target device 20 are connected by a wired or wireless communication line 31. Further, the monitoring target device 20 and the other monitoring target device 20 are connected by another wired or wireless communication line 32.

  2 and 3 are diagrams illustrating an example of connection between the network monitoring device 10 of FIG. 1 and a plurality of monitoring target devices 20. In the network monitoring system 1 a shown in FIG. 2, the network monitoring device 10 and the monitoring target device 20 (identification information is #A (hereinafter the same)) are connected by a communication line 31. The monitoring target device 20 (#A) and the monitoring target device 20 (#B) are connected by a communication line 32. The monitoring target device 20 (#B) and the monitoring target device 20 (#C) are connected by a communication line 33. In the network monitoring system 1b shown in FIG. 3, the monitoring target device 20 (#B) and the monitoring target device 20 (#D) are further connected by a communication line 34.

  6 to 9 schematically show operation examples such as disconnection and restoration of the network monitoring system 1 (1a or 1b) shown in FIG. 2 or FIG. FIG. 6 is a diagram illustrating a case where the network is disconnected between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) in FIG. FIG. 7 is a diagram illustrating a case where the network is restored between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) in FIG. FIG. 8 is a diagram illustrating a case where the network is disconnected between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) in FIG. FIG. 9 is a diagram illustrating a case where the network is restored between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) in FIG.

  A network monitoring apparatus 10 shown in FIG. 1 includes a CPU (central processing unit), a control unit including a volatile and nonvolatile memory, and a peripheral circuit controlled by the control unit. Various functions are realized by executing a program (software) stored in the nonvolatile memory by the CPU. In this case, the network monitoring apparatus 10 includes an adjacent information requesting unit 101, an adjacent information receiving unit 102, an adjacent information analyzing unit 103, a monitoring information updating unit 104, as functional blocks realized using the hardware and software. A health check unit 106 and a communication unit 107 are provided, and a monitoring network table 105 is provided as information stored in the memory. However, in FIG. 1, the part which concerns on the characteristic of this invention is shown in the network monitoring apparatus 10, and the network monitoring apparatus 10 contains another structure and functional block.

  The adjacent information request unit 101 requests each monitoring target device 20 to transmit adjacent information indicating another monitoring target device 20 adjacent to each monitoring target device 20. For example, the neighboring information indicating that there is the monitoring target device 20 (#B) as the neighboring monitoring target device 20 is transmitted from the monitoring target device 20 (#A) of FIG. Also, adjacent information indicating that there are the monitoring target device 20 (#A) and the monitoring target device 20 (#C) as the adjacent monitoring target devices 20 is transmitted from the monitoring target device 20 (#B) of FIG. Will be.

  The adjacent information receiving unit 102 receives the adjacent information transmitted from the monitoring target device 20. The adjacent information analysis unit 103 refers to the monitoring network table 105 that indicates whether or not the monitoring target device 20 is connected, analyzes the received adjacent information, and detects a change with respect to the presence or absence of the monitoring target device 20.

  For example, as shown in FIG. 4 or 5, the monitoring network table 105 includes identification information (in this case, “A” to “D”) of each monitoring target device 20 for which the presence of a connection is detected based on the received adjacent information. ) And identification information of other monitoring target devices 20 connected adjacent to the monitoring target device 20 in association with each other. The monitoring network table 105a shown in FIG. 4 corresponds to the connection example of FIG. 2, and the monitoring network table 105b shown in FIG. 5 corresponds to the connection example of FIG.

  The monitoring information update unit 104 updates the monitoring network table 105 based on the result detected by the adjacent information analysis unit 103. In addition, the communication unit 107 provides a function of performing communication connection with the monitoring target device 20 via the communication line 31.

  The health check unit 106 limits the target to the adjacent monitoring target devices 20 and performs a health check at predetermined time intervals using the communication unit 107. For example, in the connection examples illustrated in FIGS. 2 and 3, the network monitoring device 10 performs a health check only on the monitoring target device 20 (#A) and performs health checks on other monitoring target devices 20 (#B and later). Does not execute. Here, the health check is an operation of exchanging predetermined information for confirming the operation status of the target network device, and the layer 3 (network layer) and layer 4 (transport) are exchanged according to the configuration of the device. Layer), layer 5 (session layer), etc., information confirmation is performed.

  On the other hand, the monitoring target device 20 is configured as a network device or the like, and is connected to one or a plurality of other monitoring target devices 20, a communication terminal (not shown), or the like. The monitoring target device 20 includes a control unit including a CPU, a volatile and a non-volatile memory, and a peripheral circuit controlled by the control unit, and is stored in the non-volatile memory. Various functions are realized by executing a program (software or firmware) by the CPU. In this case, the monitoring target device 20 includes an adjacent information generation unit 201, an adjacent information storage unit 202, an adjacent information transmission unit 203, a health check unit 204, and communication as functional blocks realized using the hardware and software. A unit 205 is provided.

  The adjacent information generation unit 201 generates adjacent information representing other adjacent monitoring target devices 20. For example, in the connection example of FIG. 2, in the monitoring target device 20 (#B), the monitoring target device 20 (#A) and the monitoring target device 20 (#C) are detected as other adjacent monitoring target devices 20. Therefore, the adjacent information including the identification information of the own device 20 (#B) and the identification information of other adjacent monitoring target devices 20 (#A) and (#C) is generated. The adjacency information generation unit 201 generates new adjacency information when connection or disconnection of another adjacent monitoring target device 20 is detected (that is, when the connection of another adjacent monitoring target device changes).

  The adjacent information storage unit 202 includes a memory or the like, and stores the adjacent information generated by the adjacent information generation unit 201. The adjacency information transmission unit 203 changes the adjacency information stored in the adjacency information storage unit 202 in response to a transmission request from the network monitoring device 10 or after receiving a transmission request, and whenever new adjacency information is generated. Then, the data is transmitted from the communication unit 205 to the network monitoring apparatus 10 that is the transmission request source.

  Also, the health check unit 204 receives a signal for requesting a health check from the communication unit 205, and returns information indicating an operation status and the like to the health check request source.

  Next, referring to FIG. 8 to FIG. 9 showing an operation example of the network monitoring system 1 (1b) shown in FIG. 3 and FIG. 10 to FIG. 20 showing sequence diagrams, the network monitoring system 1 of this embodiment is described. An operation example will be described as a series of operations 1 to 11. However, at the start of operation 1, no monitoring target device 20 is registered in the monitoring network table 105 of the network monitoring device 10, and no health check is performed on the monitoring target device 20 (#A). To do.

  (Operation 1) The network monitoring device 10 performs a health check on the monitoring target device 20 (#A) closest to the network monitoring device 10 (that is, adjacent) in advance at a constant cycle (S11 to S11 in FIG. 10). S12).

  (Operation 2) When the network monitoring apparatus 10 normally receives a response corresponding to the health check for the monitoring target apparatus 20 (#A) (S13), the monitoring information update unit 104 sends the monitoring target apparatus 20 to the monitoring network table 105. (#A) is registered (S101). Further, the adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#A) (S102). When the monitoring target device 20 (#A) receives the adjacent information request, the monitoring target device 20 (#A) returns the adjacent information to the network monitoring device 10 (S103). Here, the adjacent information receiving unit 102 receives adjacent information from the monitoring target device 20 (#A). When there is no other monitoring target device 20 connected adjacent to the monitoring target device 20 (#A), the adjacent information analysis unit 103 determines that there is no adjacent destination based on the received adjacent information ( S104).

  (Operation 3) Next, when the monitoring target device 20 (#B) is added under the monitoring target device 20 (#A), the monitoring target device 20 (#B) is adjacent to the monitoring target device 20 (#A). ) To each other (S21 in FIG. 11), and the monitoring target device 20 (#A) transmits the detection of the adjacent monitoring target device 20 (#B) to the network monitoring device 10 as adjacent information ( S201). Here, the adjacency information receiving unit 102 receives adjacency information from the monitoring target device 20 (#A).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#B) has been added under the monitoring target device 20 (#A) based on the received adjacent information (S202). The monitoring information update unit 104 registers the monitoring target device 20 (#B) on the monitoring network table 105 based on the detection result, and sets the monitoring target device 20 (#A) as the connection destination of the monitoring target device 20 (#B). ) And the monitoring target device 20 (#B) are associated and registered in the monitoring network table 105 as the connection destination of the monitoring target device 20 (#A) (S203).

  The adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#B) (S204). When the monitoring target device 20 (#B) receives the adjacent information request, the monitoring target device 20 (#B) returns the adjacent information to the network monitoring device 10 (S205). Here, the adjacent information receiving unit 102 receives the adjacent information from the monitoring target device 20 (#B). When the other monitoring target apparatus 20 connected adjacent to the monitoring target apparatus 20 (#B) is only the monitoring target apparatus 20 (#A), the adjacent information analysis unit 103 is adjacent based on the received adjacent information. It is determined that there is no destination other than the monitoring target device 20 (#A) (S206).

  (Operation 4) Similarly, when the monitoring target device 20 (#C) is added under the monitoring target device 20 (#B) (S31 in FIG. 12), the monitoring target device 20 (#B) is adjacent to the monitoring target. The detection of the device 20 (#C) is transmitted to the network monitoring device 10 as adjacent information (S301). Here, the adjacent information receiving unit 102 receives adjacent information from the monitoring target device 20 (#B).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#C) has been added under the monitoring target device 20 (#B) based on the received adjacent information (S302). The monitoring information update unit 104 registers the monitoring target device 20 (#C) in the monitoring network table 105 based on the detection result, and monitors the monitoring target device 20 (#B) as a connection destination of the monitoring target device 20 (#C). Are registered in association with each other, and the monitoring target device 20 (#C) is registered in association with the connection destination of the monitoring target device 20 (#B) (S303).

  Further, the adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#C) (S304). When the monitoring target device 20 (#C) receives the adjacent information request, the monitoring target device 20 (#C) returns the adjacent information to the network monitoring device 10 (S305). Here, the adjacent information receiving unit 102 receives adjacent information from the monitoring target device 20 (#C).

  Since the other monitoring target devices 20 connected adjacent to the monitoring target device 20 (#C) are only the monitoring target device 20 (#B), the adjacent information analysis unit 103 is adjacent based on the received adjacent information. It is determined that there is no destination other than the monitoring target device 20 (#B) (S306).

  (Operation 5) When the health check for the monitoring target device 20 (#A) is normal, the network monitoring device 10 monitors the monitoring target device 20 (#B) connected to the monitoring target device 20 (#A). , (#C) are regarded as normal, and the health check (health check indicated by the broken line in FIG. 13) is not performed on the monitoring target devices 20 (#B) and (#C).

  (Operation 6) Next, when the network between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) is disconnected (S41 in FIG. 14), the monitoring target device 20 (#A) The disconnection with the adjacent monitoring target device 20 (#B) is transmitted to the network monitoring device 10 as adjacent information (S401). Here, the adjacency information receiving unit 102 receives adjacency information from the monitoring target device 20 (#A).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#B) has been deleted from the subordinates of the monitoring target device 20 (#A) based on the received adjacent information (S402). The monitoring information update unit 104 deletes the monitoring target devices 20 (#B) and (#C) from the monitoring network table 105 based on the detection result, and also monitors the monitoring target device 20 (#B) of the monitoring network table 105. The monitoring target device 20 (#C) registered as the connection destination, the monitoring target device 20 (#B) registered as the connection destination of the monitoring target device 20 (#C), and the monitoring target device 20 (#A) The monitoring target device 20 (#B) registered as the connection destination is also deleted from the monitoring network table 105 (S403).

  (Operation 7) Next, when the network between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) is restored (S51 in FIG. 15), the monitoring target device 20 (#A) The detection of the adjacent monitoring target device 20 (#B) is transmitted to the network monitoring device 10 as adjacent information (S501). Here, the adjacency information receiving unit 102 receives adjacency information from the monitoring target device 20 (#A).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#B) has been added under the monitoring target device 20 (#A) based on the received adjacent information (S502). The monitoring information update unit 104 registers the monitoring target device 20 (#B) on the monitoring network table 105 based on the detection result, and monitors the monitoring target device 20 (#A) as the connection destination of the monitoring target device 20 (#B). ) And the monitoring target device 20 (#B) are registered as a connection destination of the monitoring target device 20 (#A) (S503).

  Further, the adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#B) (S504). When the monitoring target device 20 (#B) receives the adjacent information request, the monitoring target device 20 (#B) returns the adjacent information to the network monitoring device 10 (S505). Here, the adjacency information receiving unit receives adjacency information from the monitoring target device 20 (#B).

  The adjacency information analysis unit 103 detects that there is a monitoring target device 20 (#C) other than the monitoring target device 20 (#A) based on the received adjacent information as an adjacent destination (S506). The monitoring information update unit 104 registers the monitoring target device 20 (#C) on the monitoring network table 105 based on the detection result, and monitors the monitoring target device 20 (#B) as the connection destination of the monitoring target device 20 (#C). ) And the monitoring target device 20 (#C) are registered as a connection destination of the monitoring target device 20 (#B) (S507).

  Further, the adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#C) (S508). When the monitoring target device 20 (#C) receives the adjacent information request, the monitoring target device 20 (#C) returns the adjacent information to the network monitoring device 10 (S509). Here, the adjacent information receiving unit 101 receives the adjacent information from the monitoring target device 20 (#C).

  Since the other monitoring target devices 20 connected adjacent to the monitoring target device 20 (#C) are only the monitoring target device 20 (#B), the adjacent information analysis unit 103 is adjacent based on the received adjacent information. It is determined that there is no destination other than the monitoring target device 20 (#B) (S510).

  (Operation 8) Next, when the monitoring target device 20 (#D) is added under the monitoring target device 20 (#B) (S61 in FIG. 16), the monitoring target device 20 (#B) is adjacent to the monitoring target device 20 (#B). The fact that the target device 20 (#D) has been detected is transmitted as adjacent information to the network monitoring device 10 (S601). Here, the adjacent information receiving unit 102 receives adjacent information from the monitoring target device 20 (#B).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#D) has been added under the monitoring target device 20 (#B) based on the received adjacent information (S602). The monitoring information update unit 104 registers the monitoring target device 20 (#D) on the monitoring network table 105 based on the detection result, and monitors the monitoring target device 20 (#B) as the connection destination of the monitoring target device 20 (#D). ) And the monitoring target device 20 (#D) are registered as the connection destination of the monitoring target device 20 (#B) (S603).

  The adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#D) (S604). When the monitoring target device 20 (#D) receives the adjacent information request, the monitoring target device 20 (#D) returns the adjacent information to the network monitoring device 10 (S605). Here, the adjacent information receiving unit 102 receives the adjacent information from the monitoring target device 20 (#D). Since the other monitoring target device 20 connected adjacent to the monitoring target device 20 (#D) is only the monitoring target device 20 (#B), the adjacent information analysis unit 103 is adjacent based on the received adjacent information. It is determined that there is no destination other than the monitoring target device 20 (#B) (S606).

  (Operation 9) When the health check for the monitoring target device 20 (#A) is normal, the network monitoring device 10 monitors the monitoring target device 20 (#B) connected to the monitoring target device 20 (#A). , (#C), (#D) are considered normal, and the health check is not performed on the monitoring target devices 20 (#B), (#C), (#D) (health check indicated by a broken line in FIG. 17) ).

  (Operation 10) Next, when the network between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) is disconnected (S71 in FIGS. 8 and 18), the monitoring target device 20 (#A ) Transmits to the network monitoring device 10 the fact that it has disconnected from the adjacent monitoring target device 20 (#B) as adjacent information (S701). Here, the adjacency information receiving unit 102 receives adjacency information from the monitoring target device 20 (#A).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#B) has been deleted from the subordinates of the monitoring target device 20 (#A) based on the received adjacent information (S702). The monitoring information update unit 104 deletes the monitoring target devices 20 (#B), (#C), and (#D) from the monitoring network table 105 based on the detection result, and also monitors the monitoring target device 20 in the monitoring network table 105. The monitoring target device 20 (#B) registered as the connection destination of the monitoring target device 20 (#C), (#D) and the monitoring target device 20 (#C) registered in the connection destination of (#B) The monitoring target device 20 (#B) registered as the connection destination of the monitoring target device 20 (#D), and the monitoring target device 20 (#B) registered as the connection destination of the monitoring target device 20 (#A) Are also deleted from the monitoring network table 105 (S703).

  (Operation 11) Next, when the network between the monitoring target device 20 (#A) and the monitoring target device 20 (#B) is restored (S81 in FIGS. 9 and 19), the monitoring target device 20 (#A ) Transmits to the network monitoring device 10 information indicating that the adjacent monitoring target device 20 (#B) is detected as adjacent information (S801). Here, the adjacency information receiving unit 102 receives adjacency information from the monitoring target device 20 (#A).

  The adjacent information analysis unit 103 detects that the monitoring target device 20 (#B) has been added under the monitoring target device 20 (#A) based on the received adjacent information (S802). The monitoring information update unit 104 registers the monitoring target device 20 (#B) on the monitoring network table 105 based on the detection result, and sets the monitoring target device 20 (#A) as the connection destination of the monitoring target device 20 (#B). ) And the monitoring target device 20 (#B) are registered as a connection destination of the monitoring target device 20 (#A) (S803).

  Further, the adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#B) (S804). When the monitoring target device 20 (#B) receives the adjacent information request, the monitoring target device 20 (#B) returns the adjacent information to the network monitoring device 10 (S805). Here, the adjacent information receiving unit 102 receives the adjacent information from the monitoring target device 20 (#B).

  The adjacency information analysis unit 103 detects that the monitoring target devices 20 (#C) and (#D) exist in addition to the monitoring target device 20 (#A) based on the received adjacency information (S806). . The monitoring information update unit 104 registers the monitoring target device 20 (#C) on the monitoring network table 105 based on the detection result, and monitors the monitoring target device 20 (#B) as the connection destination of the monitoring target device 20 (#C). ) And the monitoring target device 20 (#C) are registered as a connection destination of the monitoring target device 20 (#B) (S807).

  The adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#C) (S808). When the monitoring target device 20 (#C) receives the adjacent information request, the monitoring target device 20 (#C) returns the adjacent information to the network monitoring device 10 (S809). Here, the adjacent information receiving unit 102 receives adjacent information from the monitoring target device 20 (#C).

  Since the other monitoring target devices 20 connected adjacent to the monitoring target device 20 (#C) are only the monitoring target device 20 (#B), the adjacent information analysis unit 103 is adjacent based on the received adjacent information. It is determined that there is no destination other than the monitoring target device 20 (#B) (S810).

  The monitoring information update unit 104 also sets the monitoring target device 20 (#D) on the monitoring network table 105 as the connection destination of the monitoring target device 20 (#D) based on the detection result. ) And the monitoring target device 20 (#D) are registered as a connection destination of the monitoring target device 20 (#B) (S811 in FIG. 20).

  Further, the adjacent information request unit 101 transmits an adjacent information request to the monitoring target device 20 (#D) (S812). When the monitoring target device 20 (#D) receives the adjacent information request, the monitoring target device 20 (#D) returns the adjacent information to the network monitoring device 10 (S813). Here, the adjacent information receiving unit 102 receives the adjacent information from the monitoring target device 20 (#D).

  Since the other monitoring target device 20 connected adjacent to the monitoring target device 20 (#D) is only the monitoring target device 20 (#B), the adjacent information analysis unit 103 is adjacent based on the received adjacent information. It is determined that there is no destination other than the monitoring target device 20 (#B) (S814).

  Through the operation as described above, the network monitoring apparatus 10 monitors the monitoring target apparatus 20 (that is, adjacent to) the network monitoring apparatus 10 that is closest to (ie, adjacent to) the network monitoring apparatus 10 as the target device for the health check performed between the network monitoring apparatus 10 and the monitoring target apparatus 20. #A) can be reduced only, and effective use of bandwidth and efficient device monitoring can be realized.

  By adopting this method, the health check necessary for connection confirmation is reduced, and notifications from the monitoring target devices are concentrated, so that data is likely to be lost. Regardless of the distance from the network monitoring device 10, it is possible to reduce the load on the network where the reliability of the network is lowered and to increase the reliability.

  The embodiment of the present invention is not limited to the above. For example, various connection forms such as connecting a plurality of monitoring target devices 20 to one network monitoring device 10 may be adopted, or FIG. It is possible to appropriately change the configuration of these units to be integrated or distributed via a network. The program executed by the network monitoring device 10 or the like can be provided via a computer-readable recording medium or a communication line.

DESCRIPTION OF SYMBOLS 10 Network monitoring apparatus 20 Monitoring object apparatus 100 Network monitoring apparatus 101 Adjacent information request | requirement part 102 Adjacent information receiving part 103 Adjacent information analysis part 104 Adjacent information update part 105 Monitoring network table 106 Health check part 107 Communication part 200 Monitoring object apparatus 201 Adjacent information Generation unit 202 Adjacent information storage unit 203 Adjacent information transmission unit 204 Health check unit 205 Communication unit

Claims (5)

A network monitoring device for confirming connection of a plurality of monitoring target devices,
An adjacent information requesting unit for requesting adjacent information representing other adjacent monitoring target devices to the monitoring target device;
An adjacent information receiving unit that receives the adjacent information transmitted from the monitoring target device;
An adjacent information analysis unit that refers to a monitoring network table that represents the presence or absence of connection of the monitored device, analyzes the received adjacent information, and detects a change relative to the presence or absence of the monitored device;
A monitoring information update unit that updates the monitoring network table based on the detected result;
A network monitoring apparatus comprising: a health check unit that performs a health check by limiting a target to the adjacent monitoring target apparatuses. The network monitoring device and each monitoring target device are connected by a communication line that connects the network monitoring device and the monitoring target device or a pair of the monitoring target devices. The network monitoring apparatus according to 1. The new neighboring information is transmitted from the monitoring target device for which the neighboring information is requested by the neighboring information request unit when a connection of another neighboring monitoring target device is changed. Or the network monitoring apparatus of Claim 2. A system comprising a plurality of monitoring target devices and a network monitoring device that performs connection confirmation of the plurality of monitoring target devices,
The monitored device is
An adjacency information transmitting unit that transmits adjacency information representing other adjacent monitoring target devices to the network monitoring device,
The network monitoring device is
An adjacent information requesting unit for requesting adjacent information representing other adjacent monitoring target devices to the monitoring target device;
An adjacent information receiving unit that receives the adjacent information transmitted from the monitoring target device;
An adjacent information analysis unit that refers to a monitoring network table that represents the presence or absence of connection of the monitored device, analyzes the received adjacent information, and detects a change relative to the presence or absence of the monitored device;
A monitoring information update unit that updates the monitoring network table based on the detected result;
A network monitoring system, comprising: a health check unit that performs a health check by limiting a target to adjacent monitoring target devices. A method for confirming connection of a plurality of monitoring target devices in a network monitoring system,
An adjacent information request process for requesting the monitoring target device for adjacent information representing another adjacent monitoring target device;
An adjacent information receiving process for receiving the adjacent information transmitted from the monitored device;
An adjacent information analysis process that refers to a monitoring network table that indicates the presence or absence of connection of the monitoring target device, analyzes the received adjacent information, and detects a change with respect to the presence or absence of the monitoring target device;
A monitoring information update process for updating the monitoring network table based on the detected result;
A method for confirming connection of a monitoring target device in a network monitoring system, comprising: a health check process for performing a health check by limiting a target to adjacent monitoring target devices.

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