JP2011160406A - Apparatus for monitoring network equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an equipment management cost by collecting and analyzing information to be monitored on communication equipment connected to a network at low cost to reduce burden on operators. <P>SOLUTION: An apparatus includes a network interface 18, an operation processing unit 22 which acquires the information 20 to be monitored from the communication equipment 14 to be monitored, and performs predetermined processing, an internal memory 24 which stores control data including the acquired information 20 to be monitored, a display 26 which displays the result of operation processing, a memory interface 38 which is connected to an external memory 36 storing monitoring control information 34, and an input/output interface 40 which receives the input of information 42 to designate a monitoring operation. The external memory 36 stores the monitoring control information 34 which includes identification information 28 which identifies the communication equipment 14 to be monitored, a monitoring item 30, and analysis decision information 32 on the information 20 to be monitored, thereby an apparatus body with high versatility can be obtained so as to monitor any network communication equipment. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a network device monitoring and monitoring apparatus used for monitoring the state of a network and a communication device connected to the network.

  The operation state of the repeaters, amplifiers, and other communication devices connected to the network changes in response to changes in the state of the devices connected to the network and the communication load. Therefore, it is an important task for a telecommunications carrier and a network user to monitor whether the network and each communication device used are operating normally with the expected performance. Various monitoring systems for communication devices have been developed for this purpose (see Patent Document 1).

JP 2006-197204 A

The known prior art has the following problems to be solved.
Conventionally, monitoring of communication devices connected to a network has been performed by a monitoring server also connected to the network. The monitoring program installed in the monitoring server accesses each communication device individually and acquires monitoring target information. The obtained monitoring target information is analyzed by a dedicated operator, and the results are compiled into a report. However, the monitoring server and monitoring program provided for each communication device are dedicated products. In addition, the labor cost for the analysis operator of the acquired monitoring target information is high.
There are also known devices that automatically detect communication failures and collect failure analysis data. However, a device that generates a communication failure and has a poor function of detecting the communication failure cannot collect data for failure analysis.
The present invention has been made paying attention to the above points, and easily collects and analyzes monitoring target information of communication devices connected to the network to reduce the burden on the operator and reduce management costs of the network and communication devices. It is an object of the present invention to provide a network device monitoring monitor device that enables the above.

The following configurations are means for solving the above-described problems.
<Configuration 1>
A network interface connected to the network to which the monitoring target communication device is connected, an arithmetic processing unit that acquires the monitoring target information from the monitoring target communication device and executes a predetermined process, and for control including the acquired monitoring target information An internal storage device for storing information, a display for displaying a result of arithmetic processing by the arithmetic processing device, identification information for identifying a monitoring target communication device, a monitoring item, and an analysis used for analysis and determination of the monitoring target information A memory interface that connects an external storage device that stores monitoring control information including determination information, and an input / output interface that accepts input of information specifying a monitoring operation, and the arithmetic processing unit accepts via the input / output interface. According to the monitoring operation designation information, the identification information stored in the external storage device is read. Information acquisition means for acquiring the monitoring target information specified by the monitoring item from the corresponding monitoring target communication device, and information for analyzing the acquired monitoring target information by reading the analysis determination information stored in the external storage device An apparatus for monitoring and monitoring a network device, comprising: analysis means; and display control means for displaying an analysis result of the information analysis means on the display.

<Configuration 2>
In the network device monitoring monitor device according to Configuration 1, when the monitoring control information stored in the external storage device connected to the memory interface is displayed on the display, the input / output interface is selected. A network device monitoring and monitoring apparatus, wherein operation keys that can be changed are connected.

<Configuration 3>
In the network device monitoring monitor device according to Configuration 2, when an alarm threshold value included in the monitoring control information and a release threshold value for releasing the alarm are displayed on the display, operation keys for selecting and changing the contents are connected. A network device monitoring and monitoring apparatus characterized by the above.

<Configuration 4>
4. The network device monitoring monitor according to any one of configurations 1 to 3, wherein a storage medium for storing a part or all of the monitoring target information is attached to the memory interface. apparatus.

<Configuration 5>
5. The network device monitoring monitor device according to any one of configurations 1 to 4, wherein the display control means displays event log information that can be scroll-displayed on the display.

<Configuration 6>
6. The network device monitoring and monitoring apparatus according to any one of configurations 1 to 5, wherein the display control unit blinks the entire background of the screen displayed on the display with an alarm color when an alarm occurs. Monitoring monitor device.
<Configuration 7>
The network device monitoring and monitoring device according to any one of configurations 1 to 6, wherein the information acquisition unit collects communication control information including a management information base (MIB) from the monitoring target communication device, and the monitoring that cannot collect the MIB Response information is collected by sending a PING (Packed Internet Gopher) command to the target communication device, and the collection time information is added to the collected communication control information and response information and stored in the storage device. A network device monitoring and monitoring device.

<Configuration 8>
In the network device monitoring monitor device according to Configuration 7, a LAN analyzer having a function of reading a predetermined amount of data transferred over the network and storing it in a built-in storage device is connected to the network including the monitored communication device. The information analysis means compares the information collected from one device on the network with the information collected from another device, and when the predetermined condition occurs, A network device monitoring / monitoring device for generating a control signal for prohibiting an operation of storing new data in the storage device and updating the data.

<Configuration 9>
In the network device monitoring monitor device according to Configuration 7, a LAN analyzer having a function of reading a predetermined amount of data transferred over the network and storing it in a built-in storage device is connected to the network including the monitored communication device. The information analysis means provides a threshold for a specific parameter included in information collected from any device on the network, and when the parameter exceeds the threshold, A network device monitoring and monitoring apparatus, wherein a control signal for prohibiting an operation of storing new data in the storage device and updating the data is generated.

<Configuration 10>
In the network device monitoring monitor device according to any one of configurations 1 to 9, the information acquisition unit sets a plurality of monitoring target areas to collect and collect information collectively, and sets an information collection condition for each monitoring target area. The monitoring control information is stored, and when the information acquisition unit is activated, the monitoring control information is selected, and the monitoring target information is collected from the corresponding monitoring target area. .

<Effects of configurations 1 to 6>
Since the identification information for identifying the monitored communication device, the monitoring item, and the analysis determination information are stored in the external storage device, the device main body is highly versatile so that any network communication device can be set as the monitored communication device. Can be a thing.
<Effect of Configuration 7>
Information necessary for monitoring a network failure can also be automatically collected from monitored communication devices that cannot collect MIBs.
<Effect of Configuration 8>
Since multiple monitored communication devices connected to the network are monitored at the same time, the information collected from one device is compared with the information collected from another device. ) Can be detected and dealt with.
<Effect of Configuration 9>
Since a threshold is set for a specific parameter included in information collected from any device and the parameter exceeds the threshold, it is possible to detect a preliminary phenomenon in which a failure occurs.
<Effect of Configuration 10>
A plurality of ini files to be read when the information acquisition unit is activated can be provided and activated after being selected. Therefore, network devices with different environments. Device monitoring can be performed with the same device.

1 is a block diagram illustrating a network device monitoring monitor device according to a first embodiment. It is an external perspective view of a network device monitoring monitor device. It is a top view of the display which shows the example of a display screen of an analysis determination result. It is a top view of the display which shows another example of a display screen of an analysis determination result. It is a perspective view which shows another Example of the monitoring monitor apparatus. It is a top view of the display which shows another example of a display screen of an analysis determination result. It is explanatory drawing of MIB collection operation | movement. It is a general view of a monitoring target network.

The network device monitoring monitor device of the present invention is a device that monitors the status of the network itself and the communication devices connected to the network. Communication devices monitored by this monitor device are transmission line repeaters, amplifiers, and other communication devices that constitute coaxial cable lines, optical cable lines, and the like. Whether the communication device is operating normally or whether the traffic is appropriate is monitored, and the monitoring target information is acquired. The method of acquiring the monitoring target information includes a method of accessing a specific memory address where the monitoring target information is stored, a method of acquiring the monitoring target information by communicating with a request and a response, and a transmitter provided on the device side. In addition, there is a method of receiving notification when monitoring target information is generated. In the present invention, the monitoring target information is acquired mainly by a method of accessing a specific memory address where the monitoring target information is stored. In order to analyze the acquired monitoring target information and determine the state of the communication device, processing unique to the communication device is required. In the present invention, analysis determination information used for this purpose is acquired mainly from an external storage device.
Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1 is a block diagram illustrating a network device monitoring monitor device 10 according to the first embodiment. FIG. 2 is an external perspective view thereof.
The monitoring monitor device 10 is used by being connected to the IP network 16. The monitored communication device 14 is connected to the IP network 16. The monitoring monitor device 10 is provided with a network interface 18 connected to the IP network 16. Further, an internal storage device 24 and an arithmetic processing device 22 are provided inside the monitoring monitor device 10. Further, an input / output interface 40 for connecting the display 26 and operation keys 27 and a memory interface 38 for connecting an external storage device 36 are provided.

  The arithmetic processing unit 22 acquires the monitoring target information 20 from the monitoring target communication device 14 and executes a predetermined process. For this purpose, the arithmetic processing unit 22 includes an information acquisition unit 44, an information analysis unit 46, and a display control unit 48. These are all computer programs executed by a CPU (central processing unit) (not shown) incorporated in the arithmetic processing unit 22.

  The information acquisition unit 44 reads the identification information 28 stored in the external storage device 36 according to the monitoring operation specifying information 42 received through the input / output interface 40 and specifies the monitoring item 30 from the corresponding monitoring target communication device 14. The monitoring target information 20 is acquired. The monitoring operation designation information 42 is information that designates a monitoring target communication device, a monitoring operation timing, and the like, and is stored in the internal storage device 24 in advance. This is input using the operation key 27, for example.

  The identification information is data indicating the ID of the monitoring target communication device 14, the memory address where the monitoring target information 20 is stored, and the like. The monitoring target information 20 is automatically generated on the monitoring target communication device 14 side and stored in a storage device on the device side. Although the monitoring target information 20 is acquired in accordance with the designation of the monitoring item 30, the monitoring target information 20 may be acquired unconditionally and collectively. The acquired monitoring target information 20 is stored in the internal storage device 24.

  The information analysis unit 46 has a function of reading the analysis determination information 32 stored in the external storage device 36 and analyzing the acquired monitoring target information 20. The analysis determination result 43 is stored in the internal storage device 24. The display control unit 48 has a function of displaying the analysis determination result 43 generated by the information analysis unit 46 on the display 26.

  In the external storage device 36, the identification information 28, the monitoring item 30, the analysis determination information 32, and other information 33 are stored. The other information 33 includes arbitrary data for controlling the monitoring monitor device 10. As described above, since the identification information 28 for identifying the monitored communication device 14, the monitoring item 30, and the analysis determination information 32 are stored in the external storage device 36, any network communication device can be monitored by the device main body. It is possible to make the communication device 14 highly versatile.

  Further, as shown in FIG. 2, operation keys 27 are provided on the surface of the apparatus main body on which the display 26 is provided. Further, the network interface 18 and the memory interface 38 are provided on the side surface. Since this device can be configured compactly as a whole, it can be provided in the monitoring target communication device 14 or stored in a narrow space, and can be provided at low cost. In order to notify an administrator that a congestion state has occurred in the monitored communication device 14 during automatic monitoring, a revolving light 17 may be connected to the IP network 16. In addition to lighting the lamp, it is also possible to sound a buzzer.

  Note that the monitoring control information 34 stored in the external storage device 36 may be used after being taken into the internal storage device 24 in order to speed up the arithmetic processing. This state is indicated by a broken line in the internal storage device 24 in the figure. Further, the monitoring target information 20 acquired from the monitoring target communication device 14 may be transferred to the external storage device 36 in order to be analyzed or stored by another computer. At this time, the monitoring target information 20 may be integrated with a time stamp indicating the acquired time.

FIG. 3 is a plan view of a display showing an example of a display screen of analysis determination results.
As shown in the figure, the monitoring analysis result designated by the monitoring item 30 is displayed as a display item list. Further, for example, the threshold value of each monitoring item that needs to generate an alarm is displayed. This threshold value is included in the analysis determination information 32. For example, the threshold value can be changed by operating the operation key 27. If the contents of the monitoring control information stored in the external storage device 36 can be changed by operating the operation key 27, the monitoring control information is optimized as necessary, and thereafter the monitoring process is automatically executed.

  For example, thresholds for issuing alarms for line speed, line overhead, packet loss, packet misordering, jitter, and the like are provided. When the threshold value is exceeded, an alarm display such as a blinking mark is performed. For example, for packet loss, the evaluation time interval is selected and displayed as “1 minute / 10 minutes / 1 hour”, and the administrator operates the operation key 27 to select one. It also requests selection of whether the operation mode is updated to an average value or every hour. In this way, the monitoring operation designation information 42 is set for each government item.

  As described above, the transmission quality of the IP network 16 used for video transmission or the like can be continuously monitored to ensure the transmission quality. It is also possible to optimize the monitoring function by collecting and analyzing the monitoring target information 20 stored by using functions such as RTP (Real time transport protocol) and FEC (Forward error collection) and adjusting the threshold.

FIG. 4 is a plan view of a display showing another display screen example of the analysis determination result.
In this example, the release threshold is additionally displayed on the screen of FIG. When an alarm is displayed exceeding a certain threshold value, the alarm disappears when it returns below the threshold value. When the value fluctuates in the vicinity of the threshold value, a phenomenon called chattering in which the alarm frequently blinks occurs. If a release threshold is added and the threshold when the alarm disappears is set lower than the alarm threshold, the alarm disappears when the safety state is restored. The release threshold in this case also differs depending on the network state and the type of device. If the design value is determined in advance by the monitoring control information 34, it is automatically set to an appropriate value. Further, the administrator can perform optimization using the operation keys 27.

FIG. 5 is a perspective view showing another embodiment of the monitoring monitor device 10.
In the example of this figure, a storage medium 39 such as a flash memory is attached to the memory interface 38 of the network device monitoring monitor device 10. For example, the OS (operating system) of the monitoring monitor device 10 and the data stored in the internal storage device shown in FIG. 1 can be stored in the storage medium 39. Thereby, the main-body part of the monitoring monitor apparatus 10 can be comprised only with hardware, and productivity can be improved.

FIG. 6 is a plan view of a display showing still another display screen example of the analysis determination result.
In the example of this figure, event log information is displayed together with the line status (status). In the event log information, various phenomena occurring in the monitored communication device 14 are displayed in time series. If this is scroll-displayed, more detailed status monitoring and analysis can be performed. Further, if the analysis determination information 32 is used to process the information in an easy-to-see manner, the attribute information 50 shown in FIG. 5 can be displayed.

  The monitoring monitor device 10 is individually connected to the monitoring target communication device 14 and automatically monitors its state individually. By analyzing the event log information, it is possible to predict not only the operating state of the monitored communication device 14 itself, but also the state of the network and other communication devices connected before and after that, and can cope with various states. In the previous embodiment, the revolving light is operated when a congestion state occurs. For example, the display control means 48 (FIG. 1) is displayed on the display 26 for an alarm occurrence notification. The entire background of the screen may blink in red or yellow. It looks better from a distance than the high-intensity flashing display of characters and symbols. The warning color should be set so that yellow is a warning level and red needs immediate action.

  If the specialized engineer sets the monitoring control information 34 stored in the external storage device 36 in detail according to the type of the monitoring target communication device 14, the monitoring control information 34 can be general-purpose from any monitoring target communication device 14. It is possible to analyze the monitoring target information 20 acquired by various methods under optimum conditions and obtain a necessary determination result.

  The network device monitoring and monitoring apparatus described above can be used by connecting to any location on the network. In addition, this device has a function of communicating with a network device connected to the network when the device is designated. Some network devices have a function of displaying a management information base (MIB). The MIB is communication control information such as IP packet loss, IP packet misordering, IP packet jitter, IP packet reproduction, IP packet non-reproduction, ASI line speed, and ASI line error observed in the corresponding network device.

FIG. 7 is an explanatory diagram of the MIB collection operation.
In this figure, the network device monitoring monitor device 10 communicates with the corresponding network device 52 and collects the MIB 54. That is, the collected monitoring target information 20 (FIG. 1) is set as MIB. When the MIB 54 collected from a plurality of devices on the network is compared and analyzed, the state of the data transmitted via the network device 52 and whether each network device 52 is operating normally are determined. Can diagnose the function. In this figure, the IP switch 56 also corresponds to a network device, but only other network devices will be described here.

  In the network of FIG. 7, a network device 53 that does not have a function of displaying MIB is connected via the IP switch 56. If such devices are mixed on the network, the diagnosis of the entire network cannot be made accurate. Therefore, the network device monitoring monitor device sends a PING (Packed Internet Gopher) command (packet arrival confirmation request) to the network device 53 that cannot collect MIB. If the response to the PING command is analyzed, the connection state of the network device 53 can be known. For the time series diagnosis of the network, the response information returned by the PING command is time stamped and saved. That is, the information acquisition unit 44 (FIG. 1) generates the monitoring target information 20 by adding the collection time information (time stamp) to the communication control information such as the MIB and the response information of the PING command. This is stored in the device 24 (FIG. 1). Thereby, for example, the status information of the network device every predetermined time can be recorded in the storage device.

  When the GET command is transmitted, unique identification information of the network device can be automatically acquired. This processing is preferably performed by the information acquisition unit 44 (FIG. 1). In collecting the MIB, in addition to the object ID, a unique index (identification information) assigned to the network device may have to be added. This information can be collected with the GET command to establish communication with the network device to be monitored.

FIG. 8 is an overall view of the monitoring target network.
In the figure, base A and base B are connected by an IP network 16. The site A is provided with an IP switch 56 and a network device 52 (router). Similarly, the base B is provided with an IP switch 56 and a network device 52. These communication devices and the IP network 16 are monitored by the network device monitoring monitor device 10. Further, when a failure is detected on this network, a LAN analyzer 58 is provided in order to confirm the cause of the failure.

  As shown in the figure, when a LAN analyzer 58 is connected to a network, it is possible to detect an abnormal signal by reading and analyzing data transferred through the network. The LAN analyzer 58 reads a certain amount of data transferred over the network, stores it in a built-in storage device, and holds it. The data is retained by the storage capacity of the storage device, and thereafter, the new data is overwritten on the old data, and the operation of retaining a certain amount of data is continued. For example, when any failure is detected, the data held in the storage device can be taken out and analyzed.

  Some known network devices have a function of transmitting a failure occurrence notification (SNMP trap) to a server or the like when a communication failure is detected. The LAN analyzer 58 intercepts and detects the failure occurrence notification, and stops the operation of overwriting new data in the storage device. Thus, the data used for analyzing the cause of the failure remains held in the storage device. This control is not possible with devices that do not have a failure occurrence notification function. Further, if the occurrence timing of the failure occurrence notification is delayed or the detection of the failure occurrence notification is delayed, normal processing cannot be performed.

  The apparatus 10 of this embodiment detects an abnormality of all network devices on the network to be monitored. This is due to the MIB collection and PING command transmission described above. When any abnormality is detected, a control signal such as a command for prohibiting the update of recorded data and a trap signal is directly transmitted to the LAN analyzer 58. As a result, instead of a device that does not have a failure occurrence notification function, it is possible to collect failure detection information reliably and quickly in synchronization with the LAN analyzer. Data overwrite operation can be stopped in the shortest time after detection of an abnormality.

  Even if each network device has a failure notification function, it is based only on information that can be acquired by the device alone. However, since the network device monitoring and monitoring apparatus 10 of this embodiment monitors the entire network in a lump, it can detect the presence or absence of a failure by comparing data transmitted and received by all devices on the network. Fault detection is possible.

  That is, the information analysis means 46 (FIG. 1) of the network device monitoring and monitoring apparatus 10 compares the MIB of one network device on the network with the MIB of another network device, and when a certain state set in advance occurs. The control signal for prohibiting the update of the recording data can be generated. It is possible to prevent a failure by setting a state where a failure may occur individually for each device. Furthermore, it is possible to freely set a command generation condition for prohibiting update of recorded data. It is also possible to monitor the level fluctuation by setting a threshold value for a specific parameter. That is, when the parameter exceeds the threshold value, the update of the recording data is prohibited. Therefore, even in the state where it has not been detected as a failure in the past, the information acquired by the LAN analyzer can be analyzed, and a failure can be predicted.

  As shown in FIG. 8, when the local network of the base A to be monitored and the local network of the base B are connected via the wide area network (IP network 16), the base A is monitored. The base B includes the equipment group a, and the base B includes the monitoring target equipment group b. In such a case, the network device monitoring and monitoring apparatus 10 can remotely monitor both the monitoring target device groups a and b at the same time. At this time, the information collection procedure, the MIB collection destination, and the like differ between when the monitoring target device group a is monitored and when the monitoring target device group b is monitored.

  Therefore, a plurality of ini files of monitoring programs that are automatically started at the time of activation are stored in the storage device of the apparatus 10. Then, a program for selecting these ini files when the information acquisition unit 44 (FIG. 1) starts up the program is provided. That is, a plurality of monitoring target areas for collecting monitoring target information are set, and monitoring control information 34 (FIG. 1) indicating information collection conditions is stored for each monitoring target area. When the information acquisition means 44 is activated, the monitoring control information 44 is selected and monitoring target information is collected from the corresponding monitoring target area. Thus, for example, data can be collected for each local area network having different properties, and these can be collected as monitoring targets.

DESCRIPTION OF SYMBOLS 10 Network apparatus monitoring monitor apparatus 14 Monitoring object communication apparatus 16 IP network 17 Revolving light 18 Network interface 20 Monitoring object information 22 Arithmetic processing apparatus 24 Internal storage device 26 Display 27 Operation key 28 Identification information 30 Monitoring item 32 Analysis determination information 34 Monitoring control Information 36 External storage device 38 Memory interface 39 Storage medium 40 Input / output interface 42 Monitoring operation designation information 43 Analysis determination result 44 Information acquisition means 46 Information analysis means 48 Display control means 52 Network equipment 53 Network equipment 54 MIB
56 IP switch 58 LAN analyzer 60 Video terminal

Claims (10)

A network interface connected to the network to which the monitoring target communication device is connected, an arithmetic processing unit that acquires the monitoring target information from the monitoring target communication device and executes a predetermined process, and for control including the acquired monitoring target information An internal storage device for storing information, a display for displaying a result of arithmetic processing by the arithmetic processing device, identification information for identifying a monitoring target communication device, a monitoring item, and an analysis used for analysis and determination of the monitoring target information A memory interface that connects an external storage device that stores monitoring control information including determination information, and an input / output interface that receives input of information specifying a monitoring operation;
The arithmetic processing unit includes:
Information acquisition for reading the identification information stored in the external storage device in accordance with the monitoring operation designation information received through the input / output interface and obtaining the monitoring target information specified by the monitoring item from the corresponding monitoring target communication device Means for reading the analysis determination information stored in the external storage device and analyzing the acquired monitoring target information, and display control means for displaying the analysis result of the information analysis means on the display. A network device monitoring monitor device characterized by the above. The network device monitoring monitor device according to claim 1,
The input / output interface is connected with an operation key for selecting and changing the contents of the monitoring control information stored in the external storage device connected to the memory interface when the information is displayed on the display. A network device monitoring and monitoring device. In the network equipment monitoring monitor device according to claim 2,
An operation key for selecting and changing the contents of an alarm threshold included in the monitor control information and a release threshold for canceling the alarm when the alarm threshold is included on the display is connected. apparatus. In the network equipment monitoring monitor device according to any one of claims 1 to 3,
A network device monitoring monitor device, wherein a storage medium for storing part or all of the monitoring target information is attached to the memory interface. In the network equipment monitoring monitor device according to any one of claims 1 to 4,
The network device monitoring monitor device, wherein the display control means displays event log information that can be scroll-displayed on the display. In the network equipment monitoring monitor device according to any one of claims 1 to 5,
The network device monitoring monitor device, wherein the display control means blinks the entire background of the screen displayed on the display with an alarm color when an alarm occurs. In the network equipment monitoring monitor device according to any one of claims 1 to 6,
The information acquisition unit collects communication control information including MIB (management information base) from the monitored communication device, and sends a PING (Packed Internet Gopher) command to the monitored communication device that cannot collect MIB. And collecting the response information, adding the collection time information to the collected communication control information and response information, and storing the information in a storage device. In the network equipment monitoring monitor device according to any one of claims 1 to 7,
When a LAN analyzer having a function of reading a predetermined amount of data transferred through the network and storing it in a built-in storage device is connected to the network including the monitored communication device,
The information analysis means compares the information collected from one device on the network with the information collected from another device, and when the predetermined condition occurs, the information is stored in the LAN analyzer. A network device monitoring and monitoring apparatus, characterized in that a control signal for prohibiting an operation of storing new data and updating data in the apparatus is generated. In the network equipment monitoring monitor device according to any one of claims 1 to 7,
When a LAN analyzer having a function of reading a predetermined amount of data transferred through the network and storing it in a built-in storage device is connected to the network including the monitored communication device,
The information analysis means provides a threshold for a specific parameter included in information collected from any device on the network, and when the parameter exceeds the threshold, the storage device A network device monitoring and monitoring apparatus, characterized by generating a control signal for prohibiting an operation of storing new data and updating the data. In the network equipment monitoring monitor device according to any one of claims 1 to 9,
The information acquisition means sets a plurality of monitoring target areas for collecting monitoring target information, stores the monitoring control information indicating information collection conditions for each monitoring target area, and starts the information acquisition means. A network device monitoring and monitoring apparatus that selects the monitoring control information and collects the monitoring target information from a corresponding monitoring target area.

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