JP7420761B2 - Monitoring devices, monitoring methods, programs and monitoring systems - Google Patents

Description

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

For example, Patent Document 1 discloses a network device used in an IP relay network managed by a communication carrier (carrier) and a technique for monitoring its communication route. Further, Patent Document 1 discloses accessing each monitored device to collect load information.

Japanese Patent Application Publication No. 2005-184638

When monitoring a large-scale network such as an IP relay network managed by a communication carrier, the amount of data collected from network devices is often enormous. Therefore, even though the communication device itself is operating normally, if the collected data is missing for some reason, it may be erroneously determined that there is an abnormality in the communication device. However, Patent Document 1 does not disclose a monitoring technique that takes into consideration the occurrence of defects in collected data.

A monitoring device according to one aspect of the present invention includes an acquisition unit that acquires data indicating a state of an interface of a communication device at a predetermined period, and a determination unit that determines a current state of the interface at a predetermined period based on the data. , an updating section that updates state information regarding the state of the interface based on the determination result of the determining section, and the determining section determines that the current state of the interface is: It is determined that the state is the same as the previous state of the interface.

1 is a diagram showing an example of a system configuration of a monitoring system according to an embodiment. It is a diagram showing an example of the hardware configuration of a monitoring device and a communication device. FIG. 2 is a diagram showing an example of a functional block configuration of a monitoring device. FIG. 2 is a diagram showing an example of a functional block configuration of a communication device. It is a diagram showing an example of an IF status DB and an IF data history DB. It is a flowchart which shows an example of the processing procedure performed by a monitoring device. FIG. 2 is a diagram for explaining a first specific example of a processing procedure performed by a monitoring device. FIG. 7 is a diagram for explaining a second specific example of the processing procedure performed by the monitoring device. FIG. 7 is a diagram for explaining a third specific example of the processing procedure performed by the monitoring device.

Embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in each figure, those with the same reference numerals have the same or similar configurations.

<System configuration>
FIG. 1 is a diagram showing an example of the system configuration of a monitoring system 1 according to the present embodiment. The monitoring system 1 includes a monitoring device 10, a terminal 20, a network 30, a user network 50, and the Internet 60.

The network 30 is composed of a plurality of communication devices 40 and provides a service for connecting between the user network 50 and the Internet 60 to the user. The communication device 40 is, for example, a router or a switch, and routes data flowing between the user network 50 and the Internet 60. The user network 50 is a network managed by the user, such as a home network at the user's home where a wireless LAN router is installed, or an in-house network at the user's company. The communication device 40 has a redundant configuration and is configured to be able to continue service even if one system fails.

The monitoring device 10 is a device that monitors the operating status of a plurality of communication devices 40. More specifically, the monitoring device 10 monitors the status of each interface that the communication device 40 has. The interface included in the communication device 40 means a physical interface for connecting a cable and/or a logical interface created within the physical interface. A logical interface is sometimes called a virtual interface. The states of an interface include, for example, a state in which the interface is operating normally (a state in which data can be sent and received, also referred to as "UP"), and a state in which the interface is not operating normally (a state in which data can be sent and received). It is a state in which transmission and reception are impossible, and is also called "DOWN"). The terminal 20 is connected to the monitoring device 10 and displays the operating status of each communication device 40.

In this embodiment, the monitoring device 10 accesses each communication device 40 and acquires data indicating the state of the interface of the communication device 40 (hereinafter referred to as "IF (Interface) data") at a predetermined period. It is assumed that a huge number of interfaces existing within the network 30 will be monitored. Therefore, for some communication devices 40, for some reason, such as a delay in data collection processing within the monitoring device 10, the IF data may not be acquired in time, and the IF data may be lost. could be. However, if it is determined that there is an abnormality in the interface simply because the IF data is missing, it will be incorrectly determined that there is an abnormality even though the interface is actually operating normally. Become. Therefore, in this embodiment, when the IF data is missing, the monitoring device 10 supplements the current state based on the past state of the interface. According to this, the monitoring device 10 according to the present embodiment can prevent erroneous determinations.

<Hardware configuration>
FIG. 2 is a diagram showing an example of the hardware configuration of the monitoring device 10 and the communication device 40. The monitoring device 10 and the communication device 40 include a processor 11 such as a CPU (Central Processing Unit) and a GPU (Graphical Processing Unit), a memory device 12 such as a memory, an HDD (Hard Disk Drive), and/or an SSD (Solid State Drive), It has a communication IF (Interface) 13 that performs wired or wireless communication, an input device 14 that receives input operations, and an output device 15 that outputs information. The input device 14 of the monitoring device 10 is, for example, a keyboard, a touch panel, an operation panel, an input terminal, a mouse, and/or a microphone. The output device 15 is, for example, a display, an output terminal, a touch panel, and/or a speaker.

<Functional block configuration>
(monitoring device)
FIG. 3 is a diagram showing an example of the functional block configuration of the monitoring device 10. As shown in FIG. The monitoring device 10 includes a storage section 100, an acquisition section 101, a determination section 102, an update section 103, and a detection section 104. The storage unit 100 can be realized using the storage device 12 included in the monitoring device 10. Further, the acquisition unit 101, the determination unit 102, the update unit 103, and the detection unit 104 can be realized by the processor 11 of the monitoring device 10 executing a program stored in the storage device 12. Further, the program can be stored in a storage medium. The storage medium storing the program may be a non-transitory computer readable medium. The non-temporary storage medium is not particularly limited, but may be a storage medium such as a USB memory or a CD-ROM.

The storage unit 100 includes an IF (Interface) status DB 100a that stores the current status and previous status of the interface in each communication device 40, and an IF data history DB 100b that stores the history of IF data acquired from each communication device 40. Remember. The IF status DB 100a and the IF data history DB 100b may be referred to as "status information" and "history information", respectively.

The acquisition unit 101 acquires IF data of the communication device 40 at a predetermined period. The acquisition unit 101 stores the acquired IF data in the IF data history DB 100b. The predetermined period may be, for example, a 30 second period, a 1 minute period, etc., but the present embodiment is not limited thereto. Further, the interface of the communication device 40 may be made redundant by two interfaces (for example, a 0-system interface and a 1-system interface, which may also be referred to as a "first interface"). In this case, the acquisition unit 101 acquires IF data for each of the two interfaces (the two first interfaces) at a predetermined period.

Note that a system generally refers to devices/components, etc. (including not only physical devices/components but also devices/components logically realized on software) for realizing a certain process. It is a term. Further, the 0 system and 1 system are terms used to identify each device/component when the devices/components, etc. for realizing a certain process are prepared in duplicate. They are also sometimes called the 1st system and 2nd system, the active system, and the standby system.

The determining unit 102 determines the current state of the interface of the communication device 40 (for example, whether the interface is operating normally) based on the IF data acquired from the communication device 40 at predetermined intervals. Further, when the acquisition unit 101 cannot acquire the IF data (that is, when the IF data is missing), the determination unit 102 determines the current state of the interface based on the past state of the interface. Specifically, for example, when the acquisition unit 101 cannot acquire the IF data, the determination unit 102 determines that the current state of the interface of the communication device 40 is the same as the previous state of the interface of the communication device 40. It can be determined that For example, assume that the predetermined period is a one-minute period, and the acquisition unit 101 accesses the communication device 40 and attempts to acquire IF data, but cannot acquire the IF data for some reason. In this case, the determining unit 102 may determine the previously determined interface state (that is, the interface state determined one minute ago) to be the current state of the interface.

Further, the determination unit 102 determines the current state of the interface of the communication device 40 based on the IF data of the two redundant interfaces (the two first interfaces) of the communication device 40. For example, if one of the two redundant interfaces (two first interfaces) of the communication device 40 is normal, the determination unit 102 determines that the current state of the interface of the communication device 40 is normal. It may be determined that Further, the determination unit 102 determines that if the acquisition unit 101 is unable to acquire the IF data from at least one of the two redundant interfaces (the two first interfaces), , it may be determined that the current state of the interface of the communication device 40 is the same as the previous state of the interface.

The updating unit 103 updates state information regarding the state of the interface of the communication device 40 based on the determination result of the determining unit 102. The state information is, for example, the IF state DB 100a, and the updating unit 103 updates the IF state DB 100a based on the current state of the interface determined by the determining unit 102. For example, the updating unit 103 replaces the previous state of the IF state DB 100a with the state of the interface stored as the current state, and also replaces the previous state of the IF state DB 100a with the current state of the interface determined by the determining unit 102. may store the state of

The detection unit 104 detects an abnormality in monitoring the communication device 40 based on the number of times IF data could not be acquired. For example, the detection unit 104 may determine that an abnormality has occurred in the monitoring of the communication device 40 when the acquisition unit 101 is unable to acquire IF data a predetermined number of times in succession.

(Communication device)
FIG. 4 is a diagram showing an example of a functional block configuration of the communication device 40. As shown in FIG. The communication device 40 includes a storage section 400, a communication processing section 401, a management section 402, an input section 403, and an output section 404. The storage unit 400 can be realized using the storage device 12 included in the communication device 40. Further, the communication processing unit 401 can be realized using the communication IF 13 included in the communication device 40. Further, the management unit 402, the input unit 403, and the output unit 404 can be realized by the processor 11 of the monitoring device 10 executing a program stored in the storage device 12. Further, the program can be stored in a storage medium. The storage medium storing the program may be a computer-readable non-transitory storage medium. The non-temporary storage medium is not particularly limited, but may be a storage medium such as a USB memory or a CD-ROM.

The storage unit 400 stores various information necessary for the operation of the communication device 40, such as a routing table and various setting information. The communication processing unit 401 performs routing of received data based on a routing table or the like. The management unit 402 manages the status of each interface included in the communication device 40. The input unit 403 receives inputs such as various operation commands provided by the communication device 40. The output unit 404 transmits data indicating the status of each interface included in the communication device 40 to the monitoring device 10.

<Processing procedure>
Next, the processing procedure performed by the monitoring device 10 will be specifically explained. The following description will be made on the assumption that the communication device 40 has a plurality of sub-interfaces that are logical interfaces within the physical interface, and that the monitoring device 10 monitors the status of each sub-interface that the communication device 40 has. . Each sub-interface is associated with a VLAN (Virtual LAN) used to separate data flowing between each user network 50 and the Internet 60 within the network 30. Further, in the following description, it is assumed that there are tens of thousands to hundreds of thousands of sub-interfaces in the entire network 30, but the present embodiment is not limited to this.

The communication device 40 is assumed to have an ACT (Active)/SBY (Standby) configuration in which a 0-system communication device 40 and a 1-system communication device 40 operate as a pair. When the sub-interface is operating normally, the state of the sub-interface of the communication device 40 in the ACT state is "UP" (normal operation), and the state of the sub-interface of the communication device 40 in the SBY state is "DOWN". ” (not working properly). Further, the term “IF data” mentioned above is data indicating the status of the sub-interface of the communication device 40.

FIG. 5 is a diagram showing an example of the IF status DB 100a and the IF data history DB 100b. The IF status DB 100a stores a communication device ID, an IFID (Interface ID), a current sub-interface status (current IF status), and a previous sub-interface status (previous IF status) in association with each other. . IFID is an ID that uniquely identifies a sub-interface that communication device 40 has. The IFID may be any ID that uniquely identifies a subinterface within the network 30. “Current IF state” means the state of the interface determined by the determination unit 102 based on the latest IF data acquired from the communication device 40. The "previous IF state" means the state of the interface determined by the determining unit 102 based on the IF data acquired from the communication device 40 in the previous cycle.

The IF data history DB 100b contains communication device IDs, IFIDs, information indicating redundant configuration (system), and history of IF data acquired from communication devices 40 of 0 system and 1 system (IF data 1 (previous) to IF Data 6 (sixth time ago)) is stored in association with the previous data. Note that there is no particular limit to the number of histories, but in the example of FIG. 5, IF data for the past six times is stored as the history.

FIG. 6 is a flowchart illustrating an example of a processing procedure performed by the monitoring device 10. The monitoring device 10 repeatedly executes the processing procedure shown in FIG. 6 for each sub-interface at a predetermined period.

In step S100, the acquisition unit 101 accesses each 0-system communication device 40, acquires IF data from each 0-system communication device 40, and stores it in the IF data history DB 100b. Further, the acquisition unit 101 accesses each communication device 40 of the 1st system, acquires IF data from each communication device 40 of the 1st system, and stores it in the IF data history DB 100b.

In step S101, the determining unit 102 determines whether both the IF data of the 0-system sub-interface and the IF data of the 1-system sub-interface have been acquired. If the information has been acquired, the process proceeds to step S102; if the information has not been obtained, the process proceeds to step S103.

In step S102, the determining unit 102 determines that the sub-interfaces are operating normally if one of the IF data of the 0-system and 1-system sub-interfaces is "UP" and the other is "DOWN". . In this case, the updating unit 103 updates the contents of the "previous IF state" in the IF state DB 100a to the contents of the "current IF state", and also updates the contents of the "current IF state" to "UP". If both the IF data of the 0-system and 1-system sub-interfaces are "DOWN", the determination unit 102 determines that the sub-interfaces are not operating normally. In this case, the updating unit 103 updates the contents of "previous IF state" in the IF state DB 100a to the contents of "current IF state" and updates the contents of "current IF state" to "DOWN".

In step S103, if one of the IF data of the 0-system and 1-system sub-interfaces has not been acquired, the determination unit 102 determines that the state of the sub-interface is the previously determined state of the sub-interface. do. Additionally, the updating unit 103 updates the contents of the "previous IF state" in the IF state DB 100a to the contents of the "current IF state", and also updates the contents of the "current IF state" to the same content as the "previous IF state". Update.

In step S104, the detection unit 104 refers to the IF data history DB 100b, and in the IF data history DB 100b, among the IF data of the 0-system and 1-system sub-interfaces, the state in which no IF data has been acquired has occurred a predetermined number of times (N times) to determine whether they are consecutive. If they are consecutive, the process proceeds to step S105; if they are not consecutive, the process is ended.

In step S105, if the state in which IF data cannot be acquired continues for a predetermined number of times (N times), the detection unit 104 determines that some abnormality has occurred in the monitoring of the sub-interface, and displays an alarm on the screen of the terminal 20, for example. etc. will be displayed.

<Specific example>
FIG. 7 is a diagram for explaining the first specific example of the processing procedure performed by the monitoring device 10. Figure 7 shows 15 cycles of IF data (“0 system IF data”, “1 system IF data”) and the determination results of the interface status determined based on the IF data (“current IF status”, “previous IF status). The column with timestamp 0 is the oldest data, and the column with timestamp 15 is the newest data. Further, "0" and "1" represent "UP" and "DOWN", respectively. Moreover, "NULL" indicates that the IF data could not be acquired. For example, the column of timestamp 3 indicates that IF data could not be acquired from the 0-system sub-interface, but IF data of "DOWN" could be acquired from the 1-system sub-interface. In this case, the current state of the sub-interface is updated with "UP" because it is updated with the previous state of the sub-interface. For example, the column of timestamp 4 indicates that IF data could not be acquired from the 1-system sub-interface, but IF data of "UP" could be acquired from the 0-system sub-interface. In this case, the current state of the sub-interface is updated with the previous state of the sub-interface "UP".

As described above, according to the present embodiment, although the sub-interface of the communication device 40 is operating normally, there is a case where IF data is lost due to an increase in the processing load within the monitoring device 10, etc. However, the subinterface is determined to be operating normally. Therefore, it is possible to suppress the occurrence of an alarm even though there is no abnormality in communication.

FIG. 8 is a diagram for explaining a second specific example of the processing procedure performed by the monitoring device 10. Regarding the "IF monitoring status" line in FIG. 8, "0" means that the interface monitoring is normal, and "1" means that it has been determined that an abnormality has occurred in the interface monitoring. In the example of FIG. 8, IF data cannot be obtained from the 1-system sub-interface in the columns of timestamps 4 to 15. In this case, the current state of the sub-interface is updated with the previous state of the sub-interface, so it continues to be updated as "UP" (that is, the sub-interface is normal). However, if the state in which the IF data cannot be acquired continues, it is assumed that, for example, there is a possibility that an abnormality has occurred in the communication line with the communication device 40. Therefore, the detection unit 104 determines that there is some kind of abnormality in the monitoring state of the sub-interface if the state in which the IF data of the sub-interface cannot be obtained continues for a predetermined number of times (here, six times).

FIG. 9 is a diagram for explaining a third specific example of the processing procedure performed by the monitoring device 10. In FIG. 9, unlike FIG. 8, in the columns of timestamps 4 to 15, it is not possible to obtain IF data from the 0-system sub-interface, and furthermore, the IF data of the 1-system sub-interface is "1". (DOWN). In the example of FIG. 8, since the IF data of the sub-interface of the 1-system indicates "0 (UP)", even if the IF data of the sub-interface of the 0-system has not been acquired, the sub-interface of the communication device 40 Therefore, it is highly likely that it is operating normally. On the other hand, in the example of FIG. 9, if the sub-interface of the 0 system is also "1 (DOWN)", the sub-interface of the communication device 40 is not operating (that is, the sub-interfaces of both systems are "DOWN"). ), service provision may be affected. In other words, it is considered that the example shown in FIG. 9 is more likely to require early response.

Therefore, if the detection unit 104 is unable to acquire the IF data of one of the sub-interfaces of both systems, and the IF data of the other system indicates that it is DOWN (not normal), Compared to the case where the IF data of one of the sub-interfaces of both systems cannot be acquired, and the IF data of the other system indicates that it is UP (normal), It may be determined that there is some abnormality in the monitoring state of the sub-interface at an earlier cycle (or timing). Similarly, when the detection unit 104 cannot acquire the IF data of both sub-interfaces of both systems, the detection unit 104 detects that the IF data of one of the sub-interfaces of both systems cannot be acquired, and Compared to the case where the IF data of the system indicates UP (normal), it is determined that there is some abnormality in the monitoring status of the sub-interface at a faster cycle (or timing). Good too.

In other words, the detection unit 104 uses the acquisition unit 101 to acquire IF data indicating normality from one of the two interfaces (two first interfaces), and was unable to acquire IF data from the other. If the acquisition unit 101 acquires IF data indicating that the two interfaces are not normal from one of the two interfaces and fails to acquire IF data from the other, or the acquisition unit 101 It may be controlled to be longer than the "predetermined number of times" when IF data cannot be acquired from each of the two interfaces. For example, in the example of FIG. 8, the "predetermined number of times" is six times, but in the example of FIG. 9, the "predetermined number of times" is three times.

<Summary>
According to the embodiment described above, when IF data acquired from an interface is missing, the monitoring device 10 complements the current state of the interface based on the past state of the interface. Thereby, the monitoring device according to one embodiment can prevent unnecessary erroneous determinations even if information acquisition from the communication device 40 fails.

Further, the monitoring device 10 determines that there is some kind of abnormality in the IF monitoring state when the state in which IF data is missing continues for a predetermined number of times. This makes it possible to notify the administrator etc. that the communication device 40 is not being monitored normally.

The embodiments described above are intended to facilitate understanding of the present invention, and are not intended to be interpreted as limiting the present invention. The flowcharts, sequences, and elements included in the embodiments, as well as their arrangement, materials, conditions, shapes, sizes, etc., described in the embodiments are not limited to those illustrated and can be changed as appropriate. Further, it is possible to partially replace or combine the structures shown in different embodiments.

DESCRIPTION OF SYMBOLS 1... Monitoring system, 10... Monitoring device, 11... Processor, 12... Storage device, 13... Communication IF, 14... Input device, 15... Output device, 20... Terminal, 30... Network, 40... Communication device, 50... User Network, 60... Internet, 100... Storage unit, 100a... IF status DB, 100b... IF data history DB, 101... Acquisition unit, 102... Judgment unit, 103... Update unit, 104... Detection unit

Claims (11)

an acquisition unit that acquires data indicating states of two interfaces of the communication device at a predetermined period;
a determination unit that determines current states of the two interfaces at predetermined intervals based on the data;
an updating unit that updates state information regarding the states of the two interfaces based on the determination result of the determination unit;
a detection unit that detects an abnormality in the monitoring of the communication device based on the number of times the data could not be acquired;
The determination unit determines that the current state of the two interfaces is the same as the previous state of the two interfaces, if the data cannot be acquired by the acquisition unit;
The detection unit includes:
If the acquisition unit fails to acquire the data a predetermined number of times in succession, determining that an abnormality has occurred in the monitoring of the communication device,
The acquisition unit acquires the data indicating that one of the two interfaces included in the interface of the communication device is normal, and the data cannot be acquired from the other interface. The acquisition unit acquires the data indicating that the interface is not normal from one of the two interfaces, and the data cannot be acquired from the other interface for the predetermined number of times when or controlling the number of times to be greater than the predetermined number of times when the acquisition unit is unable to acquire the data from each of the two interfaces;
Monitoring equipment. The updating unit updates the status information based on the current status of the two interfaces obtained by the determining unit.
The monitoring device according to claim 1. The determination unit includes:
If either one of the two interfaces of the communication device is normal, determining that the current state of the interface is normal;
The monitoring device according to claim 1 or 2. The determination unit includes:
If the acquisition unit is unable to acquire the data from at least one first interface of the two interfaces, the current state of the interface is the same as the previous state of the interface. judge,
A monitoring device according to any one of claims 1 to 3. A monitoring method performed by a monitoring device, the method comprising:
acquiring data indicating states of two interfaces of the communication device at a predetermined period;
determining the current states of the two interfaces at predetermined intervals based on the data;
updating state information regarding the states of the two interfaces based on the determination result of the determining step;
Detecting an abnormality in the monitoring of the communication device based on the number of times the data could not be acquired,
The determining step determines that, if the data cannot be acquired in the acquiring step, the current state of the two interfaces is the same as the previous state of the two interfaces,
The detecting step includes:
If the data cannot be acquired a predetermined number of times in succession, determining that an abnormality has occurred in the monitoring of the communication device,
the predetermined number of times when the data indicating normality is acquired from one of the two interfaces included in the interface of the communication device, and the data cannot be acquired from the other interface; , if the data indicating that one of the two interfaces is not normal is obtained, and the data cannot be obtained from the other interface, or each of the two interfaces the predetermined number of times is greater than the predetermined number of times when the data cannot be acquired from
Monitoring method. acquiring data indicating states of two interfaces of the communication device at a predetermined period;
determining the current states of the two interfaces at predetermined intervals based on the data;
updating state information regarding the states of the two interfaces based on the determination result of the determining step;
a step of detecting an abnormality in the monitoring of the communication device based on the number of times the data could not be acquired; determining that the current states of the two interfaces are the same as the previous states of the two interfaces;
The detecting step includes:
If the data cannot be acquired a predetermined number of times in succession, determining that an abnormality has occurred in the monitoring of the communication device,
the predetermined method when the data indicating normality is obtained from one of the two interfaces included in the interface of the communication device, and the data cannot be obtained from the other interface; The number of times is when the data indicating that the data is not normal is obtained from one of the two interfaces, and the data cannot be obtained from the other interface, or when the data indicating that the data is not normal is obtained from one of the two interfaces; the predetermined number of times is greater than the predetermined number of times when the data cannot be acquired from each of the
program. A monitoring system having a communication device and a monitoring device,
The communication device includes:
a management unit that manages the status of the two interfaces;
a transmitter configured to transmit data indicating states of the two interfaces to the monitoring device;
The monitoring device includes:
an acquisition unit that acquires the data from the communication device at a predetermined period;
a determination unit that determines current states of the two interfaces at predetermined intervals based on the data;
an updating unit that updates state information regarding the states of the two interfaces based on the determination result of the determination unit;
a detection unit that detects an abnormality in the monitoring of the communication device based on the number of times the data could not be acquired;
The determination unit determines that the current state of the two interfaces is the same as the previous state of the two interfaces, if the data cannot be acquired by the acquisition unit;
The detection unit includes:
If the acquisition unit fails to acquire the data a predetermined number of times in succession, determining that an abnormality has occurred in the monitoring of the communication device,
The acquisition unit acquires the data indicating that one of the two interfaces included in the interface of the communication device is normal, and the data cannot be acquired from the other interface. The predetermined number of times in the case where the acquisition unit acquires the data indicating that it is not normal from one of the two interfaces, and the data cannot be acquired from the other interface. or controlling the number of times to be greater than the predetermined number of times when the acquisition unit is unable to acquire the data from each of the two interfaces;
Monitoring system. an acquisition unit that acquires data indicating states of two interfaces of the communication device at a predetermined period;
a detection unit that detects an abnormality in the monitoring of the communication device when the data is not acquired a predetermined number of times in succession;
The detection unit includes:
If the data indicating that the communication device is not normal is obtained from one of the two interfaces included in the interface of the communication device, and the data is not obtained from the other interface, or If the data is not obtained from each of the two interfaces, the data indicating that the data is normal is obtained from one of the two interfaces, and the data is obtained from the other interface. detecting an abnormality in the monitoring of the communication device when the data is not acquired consecutively fewer times than when no data is acquired;
Monitoring equipment. A monitoring method performed by a monitoring device, the method comprising:
acquiring data indicating states of two interfaces of the communication device at a predetermined period;
detecting an abnormality in the monitoring of the communication device when the data is not acquired a predetermined number of times in succession;
In the detecting step, the data indicating that one of the two interfaces included in the interface of the communication device is not normal is obtained, and the data is obtained from the other interface. or if the data is not acquired from each of the two interfaces, the data indicating normality is acquired from one of the two interfaces, and detecting an abnormality in the monitoring of the communication device when the data is not acquired consecutively fewer times than when the data is not acquired from the other interface;
Monitoring method. acquiring data indicating states of two interfaces of the communication device at a predetermined period;
causing a computer to perform a step of detecting an abnormality in monitoring of the communication device when the data is not acquired a predetermined number of times in succession;
In the detecting step, the data indicating that one of the two interfaces included in the interface of the communication device is not normal is obtained, and the data is obtained from the other interface. or if the data is not acquired from each of the two interfaces, the data indicating normality is acquired from one of the two interfaces, and detecting an abnormality in the monitoring of the communication device when the data is not acquired consecutively fewer times than when the data is not acquired from the other interface;
program. A monitoring system having a communication device and a monitoring device,
The communication device includes:
a management unit that manages the status of the two interfaces;
a transmitter that transmits data indicating states of the two interfaces to the monitoring device,
The monitoring device includes:
an acquisition unit that acquires data indicating states of two interfaces of the communication device at a predetermined period;
a detection unit that detects an abnormality in the monitoring of the communication device when the data is not acquired a predetermined number of times in succession;
The detection unit includes:
If the data indicating that one of the two interfaces included in the interface of the communication device is not normal is obtained, and the data is not obtained from the other interface, or If the data is not acquired from each of the two interfaces, the data indicating normality is acquired from one of the two interfaces, and the data indicating normality is acquired from the other interface. detecting an abnormality in the monitoring of the communication device when the data is not acquired consecutively fewer times than when the data is not acquired;
Monitoring system.

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