JP2011248721A - Monitoring server system, communication apparatus, and supervisory control network connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of access concentration, redundancy securing, and a cost in a conventional intensive monitoring server system.SOLUTION: A plurality of communication apparatuses are connected via a network in the present invention. Each communication apparatus includes: a database for storing information of a predetermined specified information kind concerning the whole communication apparatuses of the plurality of communication apparatuses; a change detection unit for detecting a change in its own apparatus; an information transmission unit for adding the information kind and its own apparatus ID to change information of its own apparatus and notifying other apparatuses of it by broadcasting when the change detection unit has detected the change of its own apparatus; an information reception unit for receiving a broadcast notification from another apparatus; an information discrimination unit for reading the information kind added to the broadcast notification received by the information reception unit, and discriminating whether the information kind is the predetermined assigned information kind of its own apparatus or not; and an information update unit for reading the change information when the information kind is the assigned information kind of its own apparatus, and updating the information in the database.

Description

  The present invention relates to a monitoring server system, a communication apparatus, and a monitoring control network connection apparatus that use a monitoring control technique for collecting and managing information of communication apparatuses connected via a network.

  In order to manage communication devices such as routers and L2SWs connected via a network, a monitoring server system that collects and manages these device information is used. A conventional monitoring server system is a centralized system in which a monitoring server for collecting and managing information from a plurality of devices to be managed is arranged, and all device information is collected and managed on the monitoring server. . For this reason, when the client wants to know specific device information, it is necessary to access the monitoring server from the control terminal and acquire the device information from the monitoring server (see, for example, Patent Document 1).

  Further, in such a centralized monitoring server system, it is necessary to increase the reliability of the system by providing redundancy to the monitoring server so that the system does not go down when a problem occurs in the monitoring server.

JP 2004-70859 A

  In a conventional centralized monitoring server system, the client needs to acquire information about each device from the monitoring server, and access is concentrated on the monitoring server, which increases the processing amount of the monitoring server. Needed to be installed. In addition, in order to provide redundancy, it is necessary to install a plurality of monitoring servers, which causes a cost problem.

  In view of the above problems, an object of the present invention is to provide a distributed monitoring server system and a communication device that have both convenience and redundancy as if virtually accessing a single monitoring server, and are less costly. It is to provide a monitoring control network connection device.

  According to the first aspect of the present invention, in a plurality of network-connected communication devices, a database for storing information of a specific information type set in advance regarding all communication devices of the plurality of communication devices, and a change in the own device are detected. A change detection unit, and when the change detection unit detects a change in the own device, an information transmission unit that adds an information type and an own device ID to the change information of the own device and broadcasts to other devices, and An information receiving unit that receives the broadcast notification from another device, and the information type that is added to the broadcast notification received by the information receiving unit, An information discriminating unit for discriminating whether or not there is an information type; And having an information updating unit for updating the.

  The invention according to claim 2 is the communication device according to claim 1, wherein the information type includes at least one of setting information, operation log information, alarm log information, failure history information, and statistical information. To do.

  According to a third aspect of the present invention, in the communication device according to the first or second aspect, the information type handled by the plurality of communication devices is set so that two or more communication devices are responsible for the same information type. It is characterized by that.

  According to a fourth aspect of the present invention, there is provided a monitoring control network arranged between a plurality of communication devices connected to a network and a control terminal for monitoring and controlling device information of the communication devices configured by a plurality of information types. In the connection device, a connection information management unit that stores, in a connection information table, an address and a device ID of a communication device that holds device information related to a specific information type set in advance as a database from among the plurality of information types, and the control A request receiving unit that receives a request message for device information related to the specific information type from a terminal, and an address of a communication device that holds the device information related to the specific information type added to the request message as a database in the connection information table And a request transfer unit that transfers the request message with reference to the communication device and the specification received from the communication device And having a response receiving unit for receiving a response message including the device information about the information type, and a response transfer unit for transferring the reply message to the requesting said control terminal.

  According to a fifth aspect of the present invention, in the monitoring control network connection device according to the fourth aspect, the connection information management unit stores information indicating whether or not the database of the communication device is accessible in the connection information table. And the request transfer unit is inaccessible when referring to the connection information table for the address of the communication device that holds the device information related to the specific information type added to the request message as a database. If it is, the address of an accessible communication device that holds device information related to the same information type as the specific information type added to the request message as a database is selected and the request message is transferred. And

  The invention according to claim 6 is the monitoring control network connection device according to claim 4 or 5, wherein the information type of the device information held in the database is setting information, operation log information, alarm log information, failure history information And at least one of statistical information.

  The invention according to claim 7 is the supervisory control network connection device according to any one of claims 4 to 6, wherein the routing table holds routing information of the at least one control terminal, and is transmitted from the communication device. An alarm receiving unit that receives an SNMP-compatible Trap message including alarm information to be generated, and refers to the connection information table to determine a device ID of the communication device from a transmission source address of the Trap message, and the device ID and the alarm An alarm transmission unit that generates an alarm message in association with information and transmits the alarm message to all control terminals held in the routing table is further provided.

  An invention according to an eighth aspect is the supervisory control network connection device according to any one of the fourth to sixth aspects, wherein when the communication device detects a change in the own device, it In a supervisory control network connection apparatus that accommodates the communication apparatus that broadcasts by adding an information type and its own apparatus ID to apparatus change information, a routing table that holds routing information of the at least one control terminal, and the communication When the information type of the change information broadcast notified from the device is an alarm, an alarm transmitter is further provided that transmits the alarm to all control terminals with reference to the routing table.

  An invention according to claim 9 includes the communication device according to any one of claims 1 to 3 and the supervisory control network connection device according to any one of claims 4 to 8. To do.

  The monitoring server system, the communication device, and the monitoring control network connection device according to the present invention do not require a centralized monitoring server and are convenient and redundant as if one monitoring server is virtually accessed. In combination, cost problems can be reduced.

It is a figure which shows the structure outline | summary of the monitoring server system 100 which concerns on this embodiment. It is a figure which shows the structural example of the monitoring server system 100 which concerns on this embodiment. It is explanatory drawing which shows the example of apparatus information for every information classification. It is a figure which shows the structural example of the monitoring server system 900 in the case of unitary management. It is a figure which shows the structural example of the monitoring server system 100 for demonstrating the acquisition process of apparatus information. It is a flowchart between apparatuses which shows an acquisition process of apparatus information. It is a figure which shows the structural example of the monitoring server system 100 at the time of an apparatus failure. 2 is a diagram illustrating a configuration example of a communication device 102. FIG. It is a flowchart which shows the process at the time of information request message reception. It is a flowchart which shows the process at the time of transmission of a broadcast notification. It is a flowchart which shows the process at the time of reception of a broadcast notification. It is a figure which shows the structural example of the monitoring control network connection apparatus 101. FIG. It is a flowchart which shows the connection control process of the monitoring control network connection apparatus 101. FIG. 3 is a flowchart showing operations and processing of a control terminal 103. It is a figure which shows the structural example of the communication apparatus 102a. It is a flowchart which shows the alarm notification process of the communication apparatus 102a. It is a figure which shows the structural example of the monitoring control network connection apparatus 101a. It is a flowchart which shows the process at the time of the alarm reception of the monitoring control network connection apparatus 101a. It is a flowchart between apparatuses which shows the notification process of an alarm.

  Embodiments of a monitoring server system, a communication device, and a monitoring control network connection device according to the present invention will be described below in detail with reference to the drawings.

[Monitoring server system 100]
FIG. 1 is a diagram illustrating a configuration example of a monitoring server system 100 according to the present embodiment. Unlike the conventional monitoring server system, the monitoring server system 100 according to the present embodiment does not have a monitoring server that aggregates and holds information of a plurality of communication devices, and is distributed to a plurality of communication devices according to information types. This is a monitoring server system that holds information.

  In FIG. 1, the monitoring server system 100 includes a monitoring control network connection device 101, a plurality of communication devices 102, and a control terminal 103. Here, the plurality of communication apparatuses 102 are described by adding reference numeral 102-n (n is a natural number) when indicating individual apparatuses. However, in the case where the plurality of communication apparatuses 102 are common to a plurality of apparatuses, reference numeral 102 is omitted. It describes. Other portions such as the communication network 106 are also described in the same manner.

  In the example of FIG. 1, six communication devices from the communication device 102-1 to the communication device 102-6 and the monitoring control network connection device 101 are connected by a monitoring network 104. The monitoring control network connection apparatus 101 is connected to the control terminal 103 via the terminal network 105. For the sake of easy understanding, an example in which the monitoring network 104 and the terminal network 105 are different networks is shown, but the same network may be used. The plurality of communication devices 102 are connected to each other via the monitoring network 104. The monitoring network 104 is constructed in-band within the original communication network 106 where the communication device 102 transmits and receives user data. Also good. In addition, the control terminal 103 may have a plurality of terminals connected to the terminal network 105.

  In FIG. 1, a monitoring control network connection apparatus 101 collects and holds apparatus information (alarm log information, setting information, failure history information, operation log information, statistical information, etc.) of a plurality of communication apparatuses 102. Unlike the server, these pieces of device information are not retained. The monitoring control network connection device 101 holds connection information (at least four pieces of information of device ID, IP address, operation availability (UP / DOWN), information type) of the plurality of communication devices 102. Here, the information type means the type of device information, and corresponds to, for example, alarm log information, setting information, failure history information, operation log information, statistical information, and the like. These pieces of device information are held in a distributed manner with redundancy in the database of each communication device 102 according to the information type.

  When the monitoring control network connection apparatus 101 receives a request message requesting information corresponding to a specific information type from the control terminal 103, the monitoring control network connection apparatus 101 transfers the request message to the communication apparatus 102 that holds the database of the specific information type. It receives a response message including information corresponding to the specific information type requested from the communication device 102 and transfers it to the requesting control terminal 103.

  Each communication device 102 is different from the conventional communication device in that it holds a database for storing device information of all communication devices 102 relating to a preset information type. The conventional communication apparatus has a database that holds the apparatus information of the own apparatus, but the communication apparatus 102 according to the present embodiment is an apparatus of all communication apparatuses 102 related to a specific information type in addition to the apparatus information of the own apparatus. Accumulate information in a database. Since only a specific information type is used, the size of the database does not need to be increased as in a conventional monitoring server. In addition, since the database itself is conventionally held for its own device, it is not necessary to change the basic hardware configuration, so the cost problem is small. A specific configuration of the communication device 102 will be described in detail later.

  Thus, unlike the conventional monitoring server, the monitoring control network connection device 101 in the monitoring server system 100 does not hold a device information database, so the processing load is greatly reduced and system down due to access concentration is avoided. And cost reduction for providing redundancy. In addition, since redundancy is obtained by storing device information in a database of a plurality of communication devices 102 in a distributed manner according to the information type, the reliability of the system can be improved.

  Next, FIG. 2 shows an example in which device information is distributed and held in a database of a plurality of communication devices 102 according to the information type. In FIG. 2, the same reference numerals as those in FIG. The monitoring server system 100 in FIG. 2 is the same as the monitoring server system 100 in FIG. 1, but the number of communication devices 102 is different. In FIG. 1, an example of a database for each information type held in each communication device 102 is depicted. For example, the communication device 102-1, the communication device 102-8, and the communication device 102-10 are responsible for storing alarm log information, and include a database 151-1, a database 151-8, and a database 151-10, respectively. Further, the communication device 102-2, the communication device 102-6, and the communication device 102-11 are responsible for storing setting information, and include a database 151-2, a database 151-6, and a database 151-11, respectively. Similarly, the communication device 102-3 and the communication device 102-7 are responsible for storing operation log information, and include a database 151-3 and a database 151-7, respectively. The communication device 102-4 and the communication device 102-12 are responsible for storing failure history information, and include a database 151-4 and a database 151-12, respectively. In addition, the communication device 102-5 and the communication device 102-9 are responsible for storing the alarm log information, and include a database 151-5 and a database 151-9, respectively.

  As described above, since device information such as alarm log information, setting information, failure history information, operation log information, and statistical information is held in at least two communication devices 102, redundancy can be obtained.

Note that the monitoring control network connection apparatus 101 does not need to store all of the enormous amount of the apparatus information as in the conventional monitoring server, but stores the destination address of the communication apparatus 102 that holds a database corresponding to the information type. It is only necessary to have the information table 161. Then, it is only necessary to transfer device information between the control terminal 103 and each communication device 102 in accordance with the connection information table 161.
[About device information]
Here, device information such as alarm log information, setting information, failure history information, operation log information, and statistical information will be described.
(Alarm log information)
In the alarm log information database, for example, the following information is stored in the same column of the table.
Information type: Alarm log Device ID: Device ID of the device
・ Time: Time when alarm occurred ・ Various information: Alarm contents For example, FIG. 3 (a) shows an example of a database (DB) of alarm log information. Information type, device ID, occurrence time, alarm The contents are stored in association with the same column. For example, in the communication device with the device ID: 2, an alarm log is stored that indicates that a failure of the IF (interface) board occurred at the time of 9:32:00. In addition, an alarm log indicating that an abnormality in the light output reduction has occurred at the time of 11:15:20 is stored in the communication device with the device ID: 4. Similarly, an alarm log indicating that a data error abnormality has occurred at the time of 17:43:18 is stored in the communication device having the device ID: 1.
(Setting information)
In the setting information database, for example, the following information is stored in the same column of the table.
-Information type: Setting-Device ID: Device ID of the corresponding device
Time: Time when each device reads its own setting state or when setting is changed. Various information: SNMP MIB information, etc. For example, FIG. 3B is an example of a setting information database (DB). The information type, the device ID, the set time, and the set content are stored in association with the same column. For example, in the communication device with the device ID: 1, setting of the output level A at the time of 7:18:05 is stored as the setting content. In the communication device with the device ID: 2, the fact that the optical output is turned on at the time of 22:43:38 is stored as the setting content.
(Operation log information)
For example, the following information is stored in the same column of the table in the operation log information database.
Information type: Operation log Device ID: Device ID of the device
・ Time: Time when the corresponding device was operated ・ Various information: Operation details (issued CLI, SNMP GET / SET MIB, etc.)
For example, FIG. 3C shows an example of a database (DB) of operation log information, in which the information type, device ID, operation time, and operation content are stored in association with the same column. For example, in the communication device with the device ID: 3, it is stored as the operation content that the output level is changed at the time of 6:12:05. Further, in the communication device having the device ID: 1, the fact that the IF panel is switched to the standby system at the time of 8:25:32 is stored as the operation content.
(Failure history information)
In the failure history information database, for example, the following information is stored in the same column of the table.
Information type: Failure history Device ID: Device ID of the device
・ Time: Time when failure occurred ・ Various information: Content of failure For example, FIG. 3D shows an example of a database (DB) of failure history information, and shows information type, device ID, occurrence time, failure The contents are stored in association with the same column. For example, in the communication device having the device ID: 4, it is stored that a failure of the IF panel has occurred at the time of 10:22:00. Further, it is stored in the communication device having the device ID: 2 that a failure of the FAN board has occurred at the time of 17:30:40.
(Statistics)
In the statistical information database, for example, the following information is stored in the same column of the table.
-Information type: Statistics-Device ID: Device ID of the device
-Time: Time when statistical information is read-Various information: Statistical information content For example, FIG. 3 (e) shows an example of a database (DB) of statistical information, and includes information type, device ID, occurrence time, The failure content is stored in association with the same column. For example, in the communication device having the device ID: 2, it is stored that the error number A is reached at the time of 13:24:52. In addition, it is stored that the error number B is reached at the time of 20:01:24 in the communication device with the device ID: 3.

  As described above with reference to FIG. 3, each communication device 102 in which device information such as alarm log information, setting information, failure history information, operation log information, and statistical information is preset is stored in the database of each communication device 102. It is distributed and stored for each information type in charge. Note that which communication device 102 is in charge of which information type is set by the installer in each communication device when the communication device 102 is set. Or, when maintenance of the communication apparatus 102 is performed, the information type in charge may be set, changed, or deleted. Furthermore, when the number of communication devices 102 is small, the number of information types to be handled does not need to be one, and a plurality of device information such as setting information and operation log information may be handled. However, if the number of information types handled by one communication device 102 increases, the processing load increases and the same problem as a conventional monitoring server such as concentrated access may occur. It is preferable to handle one information type. In order to ensure redundancy for databases of the same information type, it is preferable that at least two communication devices 102 are assigned the same information type as described with reference to FIG.

Here, a configuration example of the conventional monitoring server system 900 is shown in FIG. 4 so that the features of the present embodiment can be easily understood. The monitoring server system 900 in FIG. 4 corresponds to the monitoring server system 100 according to the present embodiment in FIG. The monitoring server system 900 includes a plurality of monitoring servers 901, a plurality of communication devices 902, and a control terminal 903. The monitoring server 901 has a database (alarm log information DB 951, setting information DB 952, operation log information DB 953, failure history information DB 954, statistical information DB 955, etc.) for holding all device information related to all communication devices 902. Is provided. A plurality of monitoring servers 901 are arranged to ensure redundancy of the device information database and avoid access concentration. In response to a request for device information from the control terminal 103, the monitoring server 901 searches for information in its own database in response to a request from the control terminal 903 and responds to the control terminal 903 with necessary device information. Was supposed to do. In particular, when there are a plurality of control terminals 903, there has been a problem that access is concentrated and the system goes down. On the other hand, the monitoring server system 100 according to the present embodiment of FIG. 2 distributes and maintains a database of device information among a plurality of communication devices 102 for each information type, thereby performing a centralized monitoring as in the past. The server 901 is not required, and the connection information table 161 may be referred to and simply transferred to the communication device 102 holding the device information database of the corresponding information type according to the information type requested by the control terminal 103. Because the process is light, system down due to concentration of access can be avoided. Further, since the databases are arranged redundantly for each information type in the plurality of communication apparatuses 102, redundancy can be ensured and the reliability of the system can be improved. Further, since an expensive monitoring server 901 is not required, the cost of the system can be reduced.
[Example of operation for obtaining information from control terminal 103]
Next, the operation of each device when acquiring device information of the communication device 102 from the control terminal 103 will be described with reference to FIG. Note that the monitoring server system 100 in FIG. 5 is a drawing in which a part of the communication devices 102 of the monitoring server system 100 in FIG. 2 is extracted, and includes a monitoring control network connection device 101, four communication devices 102, and a control device. The terminal 103 is configured. Here, in order to explain redundancy, the four communication devices 102 are communication devices 102-1 and 102-8 in charge of alarm log information and communication devices 102-2 and 102- in charge of setting information. 6 and 2 are arranged respectively. The same operation is performed for device information other than alarm log information and setting information.

  The connection information table 161 of the monitoring control network connection apparatus 101 in FIG. 5 stores information as shown in the connection information table example 161a. In the connection information table example 161a, a DB (database) type, a device ID, an IP address, and a state are stored. Here, in the connection information table 161, when the communication device 102 is installed, the maintenance person initially registers the information type, device ID, and IP address in the monitoring control network connection device 101. However, the status (device operating status) is monitored. The control network connection device 101 polls each communication device 102, and updates to UP when a normal response is returned from each communication device 102, and DOWN when there is no polling response or an error.

  For example, in the connection information table example 161a of FIG. 5, the information type of the communication device 102-1 with the device ID 1 is alarm log information, and the destination address (IP address in this case) is 10.10.0.2. You can see that it is working. In addition, the connection information table 161 indicates that the communication apparatus 102 that holds the database of the same information type (alarm log information) has a device ID of 8 and an IP address of 10.10.10.4. Recognize. Similarly, the two communication devices 102 that hold the database whose information type is setting information are device ID: 2 and device ID 6, respectively, and the IP addresses are 10.10.10.3 and 10.10.10.5, respectively. It can be seen that both are operating normally.

  In FIG. 5, the monitoring control network connection apparatus 101 has an IP address of 10.10.10.1 on the monitoring network 104 side to which each communication apparatus 102 is connected and a terminal network to which the control terminal 103 is connected. 105 side IP address: 11.12.12.3.1. The IP address of the control terminal 103 is 11.12.13.5. Further, / 24 of each IP address is a TCP / UDP private port number, and is used as a monitoring port number in this embodiment.

  FIG. 6 is a diagram illustrating a flow of information transmitted and received among the control terminal 103, the monitoring control network connection apparatus 101, and each communication apparatus 102 described in FIG. First, the information type (alarm log information in the example of FIG. 6) of the device information that the operator wants to know is input at the control terminal 103 (IP: 11.12.13.5/24) (step S121). For example, when the operator presses an information request button, the control terminal 103 sends an information request message 131 including information of the information type requested to the monitoring control network connection apparatus 101 (IP: 11.12.1.3.24). Send. Here, in the information request message 131, the IP address (11.12.13.5/24) of the control terminal 103 is the transmission source address, and the IP address (11.12.13.1/ of the monitoring control network connection device 101). 24) is included in the destination address and information specifying the information type is included, but it is not necessary to specify the IP address of the communication device holding the database of the requested information type (even if it is not known on the control terminal 103 side) Good).

  The monitoring control network connection apparatus 101 obtains the apparatus ID and IP address of the communication apparatus 102 having the database of information of the information type specified by the information request message 131 received from the control terminal 103 from the information connection table 161 described with reference to FIG. Search is performed (step S122). At this time, since there are a plurality of communication devices 102 having a database of information of the same information type in order to ensure redundancy, for example, the communication device 102 having a small device ID is selected with priority. Alternatively, in order to avoid concentration of access, the second smallest device ID is selected for the next request of the same information type that selects the communication device 102 having the smallest device ID, and the next same information type is selected. For the request, control may be performed so as to change the communication device 102 to be accessed in order, such as selecting the third smallest device ID.

  Next, the supervisory control network connection apparatus 101 sends the information request message 131 received from the control terminal 103 to the communication apparatus 102 with the IP address selected in step S122 in the IP address (10.10.10. 1/24) is sent as the source address, and the information request message 132 is sent with the destination address as the IP address (10.10.10.24/24) of the communication device 102-1 holding the database of the alarm log information ( Step S123). The information request message 132 is a unicast frame to the communication device 102-1. Further, the information request message 131 transmitted from the control terminal 103 may be encapsulated in the information request message 132 and transmitted. Then, the communication device 102-1 that has received the information request message 132 reads the device information from the alarm log information database 151-1 that the device is in charge of, and creates and monitors the information response message 133 that includes the read device information. It transmits to the control network connection apparatus 101 (step S124). The monitoring control network connection apparatus 101 that has received the information response message 133 transmits the IP address (11.12.12.1/24) of the monitoring control network connection apparatus 101 to the information response message 133 received from the communication apparatus 102-1. The information response message 134 to which information having the destination address of the original address and the IP address (11.12.13.5/24) of the control terminal 103 that has requested the alarm log information is transmitted is transmitted (step S125). Here, when there are a plurality of control terminals 103, the monitoring control network connection apparatus 101 manages which control terminal 103 corresponds to the information request message from which the information response message from the communication apparatus 102-1 corresponds. . For example, the session ID of the control terminal 103 can be managed using the TCP protocol. Thereby, the information response message 133 can be associated with the requesting control terminal 103. Alternatively, when the information request message 131 transmitted from the control terminal 103 is encapsulated and transmitted in the information request message 132 in step S123, since the IP address of the control terminal 103 is also encapsulated, the information response message 133 is also encapsulated. If the communication device 102-1 responds with the IP address of the control terminal 103 encapsulated as it is, the supervisory control network connection device 101 does not need to manage the IP address of the control terminal 103.

  Then, the control terminal 103 that has received the information response message 134 displays the alarm log information included in the information response message 134 on a monitor or the like. In this way, the operator of the control terminal 103 can confirm the device information desired to know. In the above description, the flow of processing when the communication terminal 102-1 that holds the database of alarm log information is operating normally has been described. Next, an operation when the communication device 102-1 is not operating normally will be described with reference to FIG.

  FIG. 7 is a diagram corresponding to FIG. 5, and is different from FIG. 5 in the case where the communication device 102-1 having the device ID: 1 (IP: 10.10.10.2/24) is not operating normally. It is showing the situation. For this reason, the monitoring control network connection apparatus 101 cannot acquire the apparatus information from the alarm log information database 151-1 of the communication apparatus 102-1. Here, the monitoring control network connection apparatus 101 periodically polls to check whether each communication apparatus 102 is operating normally. If the communication control apparatus 102 is not operating normally, the monitoring control network connection apparatus 101 stores the connection information table 161. Set the device status to DOWN. For example, the device status of device ID: 1 in the connection information table example 161b is DOWN. Note that the apparatus status is UP when operating normally.

  In the state shown in FIG. 7, when there is a request for alarm log information from the control terminal 103, the monitoring control network connection apparatus 101 refers to the connection information table 161 and firstly has the smallest apparatus ID that holds the alarm log information. Device ID: 1 is to be selected, but since the device state of device ID: 1 is DOWN, the communication device that holds the database of the same information type next and that has the second smallest device ID: 8 is selected. To do. The processing flow at this time is as shown by the dotted line in FIG. 6 described above, instead of the monitoring control network connection apparatus 101 transmitting the information request message 132 to the communication apparatus 102-1 having the apparatus ID: 1. The information request message 132 is transmitted to the communication apparatus 102-8 having the apparatus ID: 8 that holds the database of the same information type. Then, the communication device 102-8 that has received the information request message 132 reads the device information (the alarm log information in FIG. 6) from the alarm log information database 151-8 that the device is in charge of, and includes the read alarm log information. The information response message 133 is created and transmitted to the monitoring control network connection apparatus 101 (step S124a).

If the device status of the communication device with device ID 8 is also DOWN, a communication device holding a database of the same information type is further searched. In this way, a communication device that holds a database of the same information type and a communication device whose device state is UP is selected. Thereby, in the monitoring server system 100 according to the present embodiment, the redundancy of the device information can be ensured.
[Configuration of Communication Device 102]
Next, a configuration example of the communication apparatus 102 will be described with reference to FIG. In FIG. 8, the communication device 102 includes a monitoring transmission / reception unit 201, a monitoring control unit 202, a main communication unit 203, an own device information DB (database) 204, and an all device information DB (database) 205. The Here, the monitoring transmission / reception unit 201 is connected to the monitoring network 104 shown in FIGS. 1 and 2 and transmits / receives data to / from each communication device 102. On the other hand, the main communication unit 203 is a block that performs an original operation of the communication device for the communication device 102 to transmit and receive user data and the like, and is connected to the communication network 106 described with reference to FIG. In the present embodiment, the operation at the time of monitoring control is mainly performed, and thus the detailed configurations and operations of the communication network 106 and the main communication unit 203 are omitted. In this embodiment, the monitoring network 104 is provided separately for easy understanding, but the monitoring network 104 may be constructed in-band within the communication network 106.

  The monitoring control unit 202 monitors the operation of the main communication unit 203, and detects the number of user data errors (packet errors, etc.) transmitted and received by the main communication unit 203, the amount of traffic, or an abnormality. In addition, the monitoring control unit 202 manages setting contents related to the own device such as the information type, the own device ID, and the IP address handled by the communication device 102 in the own device information DB 204. Furthermore, the communication apparatus 102 according to the present embodiment includes apparatus information for each information type handled by the own apparatus in the apparatus information of all apparatuses including the own apparatus, such as alarm log information, operation log information, failure history log information, and setting information. , At least one piece of information in the statistical information is managed by the all device information DB 205. In FIG. 8, the own device information DB 204 and the entire device information DB 205 are provided separately for easy understanding, but they may be managed on the same database. The database may be a semiconductor memory as well as a storage medium such as a hard disk.

  8, the monitoring control unit 202 includes a request receiving unit 251, a DB reference unit 252, and a response unit 253, and information received from the monitoring control network connection apparatus 101 as described above with reference to FIG. Performs processing corresponding to the request message. FIG. 9 is a flowchart of information request message reception processing performed by the monitoring control unit 202. The request receiving unit 251 waits until an information request message is received (step S101). The request receiving unit 251 receives the information request message from the monitoring control network connection apparatus 101 and outputs the information request message to the DB reference unit 252. The DB reference unit 252 reads the information of the information type handled by the own device (for example, alarm log information in the case of FIG. 6) from the all device information DB 205 and outputs it to the response unit 253 (step S103). The response unit 253 creates an information response message and sends it back to the monitoring control network connection apparatus 101 (step S104). In this way, a series of information request message reception processing ends. In FIG. 9, the DB reference unit 252 may determine whether or not the information type of the received information request message matches the information type handled by the own device (step S102). If they do not match, the response unit 253 may return a message indicating that the database is different.

  As described above, the request receiving unit 251, the DB reference unit 252, and the response unit 253 of the monitoring control unit 202 in FIG. 8 operate. Here, the above description has focused on the processing when an information request message is received from the control terminal 103 via the monitoring control network connection apparatus 101. However, the information type database (all data) that each communication apparatus 102 is in charge of has been described. The device information held in the device information DB 205) needs to be updated to the latest information every time the state of each communication device changes. Next, update processing of device information held in the all device information DB 205 of FIG. 8 will be described.

[Database update processing]
The communication device 102 according to the present embodiment has a function of notifying other devices of the changed content when a change in each device is detected. Then, when the device information notified from another device is the information type handled by the own device, the contents described in the database of the information type handled by the own device are updated. In this way, it is possible to always keep the information type database in charge of each device up to date.

  In order to realize the above function, in FIG. 8, the monitoring control unit 202 of each communication device 102 includes a change detection unit 261, an information transmission unit 262, a local device management unit 263, an information reception unit 264, and a type. A determination unit 265 and a DB update unit 266 are included.

  The change detection unit 261 detects a change in the state of the main communication unit 203. For example, it detects abnormalities such as the power panel, IF panel, FAN panel, etc. of the main communication unit 203, and when optical communication is being performed, it is detected that the laser power level, on / off, etc. have been replaced. Detect statistical information such as data traffic volume and number of errors. The device abnormality is, for example, a defective IF panel, a decrease in optical output, or a data error. Alternatively, the monitoring control unit 202 is compatible with the SNMP protocol, and detects set MIB information and the like. For example, a change in output level, switching of the operation system of the IF panel, on / off of optical output, and the like are detected.

  Then, the change detection unit 261 outputs the detected information to the information transmission unit 262 and the own device management unit 263. The change detection unit 261 has a clock function, and outputs the detected time to the information transmission unit 262 and the own device management unit 263 together.

  FIG. 10 is a flowchart showing processing when the information transmitting unit 262 performs broadcast notification. The information transmission unit 262 waits until the change detection unit 261 detects some change (step S201). When the change detection unit 261 detects any change, the information type, the own device ID, the time, etc. are added to the change information of the own device, and broadcast notification is made to the other communication devices 102 (step S202). Note that the broadcast notification may be made by transmitting only the difference information from the current information held in the own device information DB 204 in FIG. Only the difference information may be updated on the communication device side in charge of the information). In this way, when there is any change in the own device, the change content can be notified to other communication devices that hold the database of each information type. Note that, as is done in a normal communication device, the own device management unit 263 also updates the information in the own device information DB 204 (step S203).

  Next, processing for receiving the broadcast notified information and updating the information type database handled by the own apparatus will be described with reference to the flowcharts of FIGS. In FIG. 8, the information receiving unit 264 waits until a broadcast notification transmitted from another communication apparatus 102 is received via the monitoring transmission / reception unit 201 (step S301). When receiving the broadcast notification, the information receiving unit 264 outputs the received content to the type determining unit 265. The type determination unit 265 determines whether or not the received broadcast notification relates to the information type handled by the own device (step S302). The information type handled by the own device is set in advance when the communication device 102 is installed or maintained, and is stored in the own device information DB 204. If the information type is handled by the own device, the information is output from the type determination unit 265 to the DB update unit 266. The DB update unit 266 associates the change information, device ID, time, and the like included in the broadcast notification with each other. Information in the device information DB 205 is updated (step S303). At this time, only the difference information is updated as described above. If the information type is not handled by the own device, the broadcast notification is ignored or discarded (step S304).

  In this way, when the communication device 102 according to the present embodiment detects a change in each device, the communication device 102 notifies the other device of the changed content, and the device information is notified by the own device. If it is the information type to be updated, the database in charge of the own device is updated with the information. Thereby, the database of the information type which each apparatus is always in charge of can be maintained in the latest state. In particular, the databases of a plurality of communication devices in charge of the same information type can be synchronized and kept up to date.

[Configuration Example of Monitoring Control Network Connection Device 101]
Next, a configuration example of the monitoring control network connection apparatus 101 will be described with reference to FIG. 12, the monitoring control network connection apparatus 101 includes a terminal transmission / reception unit 301, a connection control unit 302, a device-side transmission / reception unit 303, a connection information table 161, and a routing table 304. Here, the connection information table 161 is the same as the connection information table 161 described with reference to FIG. Further, the terminal-side transmitting / receiving unit 301 is connected to at least one control terminal 103 via the terminal network 105. On the other hand, the device-side transmitting / receiving unit 201 is connected to the monitoring network 104 and transmits / receives data to / from each communication device 102.

  When the connection control unit 302 receives an information request message from the control terminal 103 via the terminal side transmission / reception unit 301, the IP address or device ID of the communication device 102 in charge of the database of the information type specified in the information request message In addition, referring to the connection information table 161 for the device status (whether or not it is operating normally), the communication device 102 to which the information request message should be transferred is selected. Then, the information request message is transferred to the IP address of the selected communication device 102, the information response message including the device information of the information type requested from the communication device 102 is received, and the information response message is sent to the requesting control terminal 103. Forward. Here, in the case of having a plurality of control terminals 103, the connection control unit 302 holds the IP address, TCP session ID, and the like for each control terminal 103 in the routing table 304, and from the request source control terminal 103 and the communication device 102 The association with the information response message to be transmitted is managed. In FIG. 8, for easy understanding, the connection information table 161 and the routing table 304 are provided separately, but they may be managed on the same database. The database may be a semiconductor memory as well as a storage medium such as a hard disk.

  In FIG. 12, the connection control unit 302 includes a request reception unit 351, a table reference unit 352, a transfer destination setting unit 353, a request transfer unit 354, a connection information management unit 355, a response reception unit 356, and a response transfer. Part 357 and an operation state polling part 358.

  The request reception unit 351 receives an information request message from the control terminal 103 and outputs the information request message to the connection information management unit 355, the table reference unit 352, and the request transfer unit 354.

  The table reference unit 352 refers to the connection information table 161 for the information type specified in the information request message received from the request receiving unit 351, acquires the IP address of the communication device 102 that holds the database of the information type, The data is output to the transfer destination setting unit 353.

  In response to the information request message transmitted by the request transfer unit 354, the transfer destination setting unit 353 transmits the IP address of the communication device 102 acquired by the table reference unit 352 as the destination IP address and the IP address of the monitoring control network connection device 101. Set to the original IP address.

  The request transfer unit 354 monitors a new information request message in which the destination IP address and the source IP address set by the transfer destination setting unit 353 are added to the information request message received from the control terminal 103 via the device-side transmission / reception unit 303. Output to the network 104 for transmission and transmitted to the destination communication device 102.

  The connection information management unit 355 acquires the IP address, TCP session ID, and the like of the control terminal 103 that is the request source of the information request message received from the control terminal 103, and manages the session using the routing table 304.

  The response receiving unit 356 receives an information response message from the communication device 102 in response to the information request message transmitted from the request transfer unit 354 to the monitoring network 104, and outputs the information response message to the response transfer unit 357. Here, the information response message includes device information of the requested information type.

  The response transfer unit 357 transmits the IP address of the control terminal 103 output by the connection information management unit 355 to the device information of the information response message input from the response reception unit 356 and the IP address of the monitoring control network connection device 101. Each is added as an original IP address. Then, the response transfer unit 357 outputs the information response message to the terminal network 105 via the terminal side transmission / reception unit 301, and transmits the information response message to the requesting control terminal 103. Here, as described above, the connection information management unit 355 encapsulates the TCP session ID and the information request message sent from the control terminal 103 and transfers the information request message to the communication apparatus 102 side. The sent information request message is associated with the information response message received by the response receiving unit 356. The IP address of the control terminal 103, the TCP session ID, and the like are managed by the routing table 304.

  As described above, the request reception unit 351, the table reference unit 352, the transfer destination setting unit 353, the request transfer unit 354, the connection information management unit 355, the response reception unit 356, and the response transfer unit 357. The information response message can be received from the communication device 102 in charge of the device information of the specified information type in response to the information request message from the control terminal 103 and transmitted to the requesting control terminal 103.

  The operation state polling unit 358 of the connection control unit 302 performs processing for determining whether or not the operation of each communication device 102 is normal via the device-side transmitting / receiving unit 303. For example, the operation state polling unit 358 periodically transmits an operation confirmation message, and if a normal response message is returned from each communication device 102, normal operation (UP state), and an incorrect response message is received from each communication device 102. If a response message is not returned even if a predetermined time elapses, it is determined that the operation is malfunctioning (DOWN state), and the device status item in the connection information table 161 is updated to UP or DOWN.

  Here, a flow of connection processing performed by the monitoring control network connection apparatus 101 described with reference to FIG. 12 will be described with reference to a flowchart of FIG. The request receiving unit 351 waits until receiving an information request message from the control terminal 103 (step S401). Then, when receiving the information request message from the control terminal 103, the request receiving unit 351 outputs it to the table reference unit 352. The table reference unit 352 refers to the connection information table 161 and acquires the IP address of the communication device 102 that is in charge of information of the information type specified in the information request message (for example, alarm log information in the case of FIG. 6) ( Step S402). The transfer destination setting unit 353 sets the IP address acquired in step S402 as the destination IP address of the information response message received from the control terminal 103. Then, the request transfer unit 354 transfers the information request message in which the destination IP address is set to the communication device 102 side (step S403). In this way, a series of information request message transfer processing is performed.

  On the other hand, the communication apparatus 102 that has received the information request message transferred from the monitoring control network connection apparatus 101 returns an information response message describing the apparatus information of the requested information type to the monitoring control network connection apparatus 101 side. Therefore, the response receiving unit 356 waits until receiving this information response message (step S404). When the response receiving unit 356 receives the information response message from the communication apparatus 102, the response receiving unit 356 outputs the information response message to the response transfer unit 357. The connection information management unit 355 refers to the routing table 304 and determines the IP address of the control terminal 103 that is the request source. Set (step S405). Then, the response transfer unit 357 transfers the information response message to the request source control terminal 103 (step S406).

  In this way, the connection control unit 302 of the monitoring control network connection apparatus 101 ends a series of connection control processes.

[Operation and processing on the control terminal 103 side]
Next, the operation of the operator on the control terminal 103 side and the processing flow of the control terminal 103 will be described with reference to the flowchart of FIG.

  An operator who operates the control terminal 103 operates a keyboard, a mouse, or the like while looking at a monitor screen for managing device information, specifies an information type of device information to be acquired, and presses a decision button, for example (step). S501). When the operator's operation in step S501 is performed, the control terminal 103 transmits an information request message to the monitoring control network connection apparatus 101 (step S502). Here, in the information request message transmitted from the control terminal 103, the IP address of the control terminal 103 is set as the transmission source IP address, and the IP address of the monitoring control network connection device 101 is set as the destination IP address. For example, in the case of FIGS. 5 and 6, the IP address of the control terminal 103 is 11.12.13.5/24, and the IP address of the monitoring control network connection apparatus 101 is 11.12.13.1/24. .

  Then, the control terminal 103 waits until an information response message is received from the monitoring control network connection apparatus 101 (step S503). When the information response message is received from the monitoring control network connection apparatus 101, the control terminal 103 displays the apparatus information (alarm log information in the example of FIG. 6) included in the information response message on a monitor or the like (step S504).

  In this way, the control terminal 103 only needs to know the IP address of the monitoring control network connection apparatus 101, and does not need to know which information type is responsible for which communication apparatus 102. That is, the operator on the control terminal 103 side can obtain device information of a necessary information type in the same manner as the operation of accessing one monitoring server 901 with the conventional monitoring server system 900. In particular, since the database is held redundantly in the plurality of communication devices 102 for each information type, redundancy can be ensured and the reliability of the monitoring server system 100 is improved. Further, unlike the conventional case, the possibility that the access is concentrated on the monitoring server 901 and a failure occurs in the system is reduced, and the reliability of the system is further improved. In addition, each communication device 102 in charge of a database of the same information type can keep the same device information synchronized and always kept up-to-date, improving the reliability of information.

(Modification of the monitoring server system 100)
Next, a modified example of the monitoring server system 100, the communication apparatus 102, and the monitoring control network connection apparatus 101 according to this embodiment described above will be described. This modification has the same system configuration as the monitoring server system 100 described with reference to FIGS. However, in this modification, when the communication apparatus 102 detects an abnormality of the own apparatus, it first reports to the monitoring control network connection apparatus 101 and issues an alarm to all control terminals 103 via the monitoring control network connection apparatus 101. It is supposed to be. For this reason, the monitoring server system 100 is configured using a communication device 102a in which a part of the communication device 102 is different and a monitoring control network connection device 101a in which a part of the monitoring control network connection device 101 is different.

  FIG. 15 is a configuration example of the communication apparatus 102a in the present modification. The communication device 102a corresponds to the communication device 102 in FIG. 8 described in the previous embodiment, and blocks having the same reference numerals as those in FIG. 8 indicate blocks having the same functions, and thus description of overlapping operations is omitted. 8 differs from the communication apparatus 102 in FIG. 8 in the configuration of the monitoring control unit 202. The monitoring control unit 202a in FIG. When the change detector 261 detects a change in the main communication unit 203, the alarm transmitter 271 determines whether the detected content is alarm information such as a failure of the IF panel. An alarm message is notified to the monitoring control network connection apparatus 101 via the monitoring transmission / reception unit 201 and the monitoring network 104. The notification of the alarm message uses an SNMP Trap message, for example.

  The flow of processing in this case is shown in the flowchart of FIG. Since the operation itself of the change detection unit 261 is the same as that of the communication apparatus 102 of FIG. 8, the detection process up to step S201 in the flowchart of FIG. 10 described above is also the same. In the case of FIG. 16, when the change detection unit 261 detects any change in the main communication unit 203, a determination process is performed to determine whether or not the detected content is an alarm (step S <b> 251). If the detected content is an alarm, a Trap message indicating the alarm is transmitted to the monitoring control network connection apparatus 101 (step S252). Note that the processing after step S202 is the same as that in the flowchart of FIG.

  In this way, the communication device 102a can notify the monitoring control network connection device 101 of an alarm.

  Next, FIG. 17 shows a configuration example of the monitoring control network connection apparatus 101a in this modification. The monitoring control network connection apparatus 101a corresponds to the monitoring control network connection apparatus 101 in FIG. 12 described in the previous embodiment, and blocks having the same reference numerals as those in FIG. . 12 differs from the monitoring control network connection apparatus 101 in FIG. 12 in the configuration of the connection control unit 302. The connection control unit 302a in FIG. 17 includes an alarm reception unit 371 and a terminal notification unit 372. The alarm receiving unit 371 detects an alarm notification such as a Trap message transmitted from the communication device 102a in FIG. 15 and outputs the alarm notification to the terminal notification unit 372. The terminal notification unit 372 notifies the alarm received by the alarm receiving unit 371 to all the control terminals 103 connected via the terminal-side transmitting / receiving unit 301 and the terminal network 105. Note that the IP addresses of all control terminals 103 are stored in the routing table 304 in advance.

  The flow of processing of the supervisory control network connection apparatus 101 in this case is shown in the flowchart of FIG. The alarm receiving unit 371 stands by until an alarm Trap message is received from the communication device 102 (step S601). At this time, when the broadcast notification is used without using the Trap message, it is determined in step S601 whether the broadcast notification is an alarm. When receiving a trap message for an alarm or a broadcast notification indicating an alarm, the terminal notification unit 372 refers to the routing table 304 and acquires the IP addresses of all the control terminals 103 (step S602). And the terminal notification part 372 transmits an alarm to all the control terminals 103 (step S603).

  In this way, the monitoring control network connection apparatus 101 can receive the alarm notification from the communication apparatus 102 and notify all the control terminals 103 of the alarm. FIG. 19 shows the flow of processing between the devices in this case. FIG. 19 is a diagram corresponding to FIG. 6 described above, and shows the flow of processing when the communication device 102-1 with the device ID: 1 detects an abnormality of the own device. First, the change detection unit 261 of the communication device 102-1 detects an alarm such as an abnormality of the own device (step S701). Then, the alarm transmission unit 271 transmits an alarm Trap message, or the information transmission unit 262 performs an alarm broadcast notification (step S702). In this way, the alarm 751 is transmitted from the communication device 102-1 to the monitoring control network connection device 101. The alarm receiving unit 371 of the monitoring control network connection apparatus 101 receives the alarm 751, and the terminal notification unit 372 refers to the IP addresses of all the control terminals 103 in the routing table 304 (step S703). Then, the terminal notification unit 372 transmits an alarm 752 to all the control terminals 103. On the other hand, the control terminal 103 that has received the alarm 752 displays the alarm content on a monitor or the like (steps S705a and 705b).

  Thus, all the control terminals 103 need only know the IP address of the monitoring control network connection apparatus 101, and do not need to know the IP address of each communication apparatus 102. The alarm of each communication device 102 is notified to all control terminals 103 via the monitoring control network connection device 101. In particular, since the monitoring control network connection apparatus 101 notifies the control terminal 103 of the alarm of each communication apparatus 102 in association with the apparatus ID, the operator on the control terminal 103 side determines which communication apparatus 102 has an abnormality. Know exactly.

As described above, as described in each embodiment, the monitoring server system 100, the communication apparatus 102, and the monitoring control network connection apparatus 101 can obtain the following effects.
Each communication device 102 can receive device information broadcast by other communication devices 102 in the same monitoring network 104, and can update the device information database of the information type that each device is responsible for. As a result, the latest device information can always be distributed and held in synchronization. Since the control terminal 103 can obtain the necessary device information simply by connecting to the monitoring control network connection device 101, there is no need to arrange a monitoring server for centrally managing all device information. Then, it is possible to acquire device information of all the communication devices 102 in the monitoring network 104 as if they are connected to a monitoring server that is centrally managed.
By redundantly holding device information of the same information type in a database of a plurality of communication devices 102 in charge, even if a failure occurs in each device, the same device information can be obtained from another device, and the system You can avoid down. Further, by distributing the device information database related to all the communication devices 102 of the conventional monitoring server to the plurality of communication devices 102, it is possible to prevent the load from being concentrated on a specific communication device.
The control terminal 103 only needs to request necessary device information from the monitoring control network connection device 101. Then, since the monitoring control network connection apparatus 101 acquires necessary apparatus information from the communication apparatus 102 holding the corresponding database and transmits it to the control terminal 103 according to the requested information type of the apparatus information, the control terminal 103 Does not need to know the network configuration on the communication device 102 side, and can easily monitor and control a plurality of communication devices 102 in the monitoring network 104. In particular, even if a failure occurs in a specific communication device 102, the control terminal 103 does not need to be aware of this, and the processing is not interrupted. Necessary device information can be acquired from the alternative communication device 102 that holds the information and transmitted to the control terminal 103.
Since the monitoring control network connection apparatus 101 holds the destination address (IP address, etc.) of the connection terminal 103 as the routing table 304, when an alarm is issued from the communication apparatus 102 in the monitoring network 104 (Trap message or broadcast) When a notification or the like is transmitted), the control terminal 103 acquires the alarm of each communication device 102 in real time by transferring the alarm information to the destination address of all the control terminals 103 held in the routing table 304. be able to.

  As described above, the monitoring server system, the communication device, and the monitoring control network connection device according to the present invention virtually access one monitoring server without installing a centralized monitoring server as in the prior art. Such convenience and redundancy are combined, and cost problems can be reduced.

  As described above, the monitoring server system, the communication device, and the monitoring control network connection device according to the present invention have been described with reference to the embodiments. However, the monitoring server system, the communication device, and the monitoring control network connection device may be implemented in various other forms without departing from the spirit or main features thereof. be able to. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The present invention is defined by the claims, and the present invention is not limited to the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Monitoring server system 101 ... Monitoring control network connection apparatus 102 ... Communication apparatus 103 ... Control terminal 104 ... Monitoring network 105 ... Terminal network 106 ... Communication network 151 ... Database 161 ... Connection information table 201 ... Monitoring transmission / reception unit 202 ... Monitoring control unit 203 ... Main communication unit 204 ... Own device information DB
205 ... All device information DB
251 ... Request receiving unit 252 ... DB reference unit 253 ... Response unit 261 ... Change detecting unit 262 ... Information sending unit 263 ... Own device management unit 264 ... Information receiving unit 265 ... type determination unit 266 ... DB update unit 301 ... terminal transmission / reception unit 302 ... connection control unit 303 ... device side transmission / reception unit 304 ... routing table 351 ... request reception unit 352 ... Table reference unit 353 ... Transfer destination setting unit 354 ... Request transfer unit 355 ... Connection information management unit 356 ... Response reception unit 357 ... Response transfer unit 358 ... Operation status polling Unit 271 ... Alarm transmission unit 371 ... Alarm reception unit 372 ... Terminal notification unit 900 ... Monitoring server system 901 ... Monitoring server 902 ... Communication device 903 ... Control terminal 95 ... alarm log information DB
952 ... Setting information DB
953 ... Operation log information DB
954 ... Failure history information DB
955 ... Statistical information DB

Claims (9)

In multiple communication devices connected to the network,
A database for storing information of a specific information type set in advance regarding all communication devices of the plurality of communication devices;
A change detection unit for detecting a change in the own device;
When the change detection unit detects a change in its own device, an information transmission unit that adds an information type and its own device ID to the change information of the own device and broadcasts to other devices, and
An information receiving unit for receiving the broadcast notification from another device;
An information discriminating unit that reads the information type added to the broadcast notification received by the information receiving unit and discriminates whether or not the information type is a preset information type of the own device;
An information update unit that reads the change information and updates the information in the database when the information type is the assigned information type of the own device. The communication device according to claim 1,
The information type includes at least one of setting information, operation log information, alarm log information, failure history information, and statistical information. The communication device according to claim 1 or 2,
The information type handled by the plurality of communication devices is set so that two or more communication devices are responsible for the same information type. In a monitoring control network connection device arranged between a plurality of communication devices connected to a network and a control terminal for monitoring and controlling device information of the communication device configured by a plurality of information types,
A connection information management unit for storing in a connection information table the address and device ID of a communication device that holds device information related to a specific information type set in advance as a database from the plurality of information types;
A request receiving unit that receives a request message of device information related to the specific information type from the control terminal;
A request transfer unit that transfers the request message by referring to the connection information table for an address of a communication device that holds device information related to the specific information type added to the request message as a database;
A response receiving unit that receives a response message including device information related to the specific information type received from the communication device;
A monitoring control network connection device, comprising: a response transfer unit configured to transfer the response message to the requesting control terminal. In the monitoring control network connection device according to claim 4,
The connection information management unit stores in the connection information table information indicating whether the database of the communication device is accessible;
When the request transfer unit refers to the connection information table for the address of the communication device that holds the device information related to the specific information type added to the request message as a database, the communication device is inaccessible Selecting the address of an accessible communication device that holds device information relating to the same information type as the specific information type added to the request message as a database, and transferring the request message. Control network connection device. In the monitoring control network connection device according to claim 4 or 5,
The monitoring control network connection device, wherein the information type of the device information held in the database includes at least one of setting information, operation log information, alarm log information, failure history information, and statistical information. In the monitoring control network connection device according to any one of claims 4 to 6,
A routing table that holds routing information of the at least one control terminal;
An alarm receiver that receives an SNMP-compatible Trap message including alarm information transmitted from the communication device;
The device ID of the communication device is determined from the source address of the Trap message with reference to the connection information table, and an alarm message in which the device ID is associated with the alarm information is created and held in the routing table A monitoring control network connection device, further comprising: an alarm transmission unit that transmits to all control terminals. The monitoring control network connection device according to any one of claims 4 to 6, wherein when the communication device detects a change in its own device, an information type and an information type are included in the change information of the own device with respect to another device. In a monitoring and control network connection device that accommodates the communication device that broadcasts by adding its own device ID,
A routing table that holds routing information of the at least one control terminal;
An alarm transmitter that transmits the alarm to all control terminals with reference to the routing table when the information type of the change information broadcast from the communication device is an alarm. Monitoring and control network connection device.   A monitoring server system comprising the communication device according to any one of claims 1 to 3 and the monitoring control network connection device according to any one of claims 4 to 8.

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