JPH11163858A - Network monitor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network monitor system in which a monitor conducts congestion control while monitoring a network. SOLUTION: Upon the receipt of a sate change notice sent from each of data exchanges 1-3, a state management means 13, a display means 14, and a 1st recording means 15 of a monitor 40 are operated. On the occurrence of congestion by the monitor 40, the operation of the 1st recording means 15 is stopped. Thus, an increase in a utilizing rate of a CPU operating the state management means 13, the display means 14, and the 1st recording means 15 is suppressed and the congestion is being decreased. When the congestion of the monitor 40 is released, the operation of the 1st recording means 15 is restarted and a state change notice having been aborted is acquired from the data exchanges 1-3, stored in a storage means 16 so as to avoid missing of the state change notice in the storage means 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a network monitoring system, and more particularly to a network monitoring system for monitoring congestion in a network.

[0002]

2. Description of the Related Art Conventionally, a network monitoring system, for example, as shown in FIG.
Or data exchanges 1 such as ATM (asynchronous transfer mode)
3 and a monitoring device 4 connected to each data exchange constituting the network.

[0003] The monitoring device 4 is used to monitor various states in the network.
(Device status (normal / abnormal of memory and CPU, etc.), line status
(Line open, close, fault, etc.)) by event processing based on a status change notification from the network and periodic status inquiry processing to each of the data exchanges 1 to 3. Monitor your network based on:

Specifically, in each of the data exchanges 1 to 3,
The status monitor 5 provided therein monitors the device status and the line status, and holds the latest status of these. When a failure occurs in a device or line in the data exchange, the message editing unit 6 changes the status of the status monitoring unit 5
Status change notification including data on the device status and line status in response to a request from the user (fault message: see FIG. 8A)
Edit. This state change notification is sent to the message transmitting unit 7.
Is transferred to the monitoring device 4 via the trunk line.
Then, the status monitoring unit 5 holds the transferred status change notification (contents) in a time series.

In the monitoring device 4, when the message receiving unit 12 receives the status change notification from each of the data exchanges 1 to 3, the status management unit 13 extracts the data relating to the device status and the line status from the status change notification. Update and keep. Subsequently, the display device 14 displays the latest status of the device status and line status of each of the data exchanges 1 to 3 in color, characters, or the like based on the content held in the status management unit 13. Further, the message recording unit 15 transmits the status change notification received by the message receiving unit 12 to the logging file 16.
(See the sequence diagram of FIG. 9A).

By the above-described processing, the state management unit 13 holds the latest data of the device state and the line state of each of the data exchanges 1 to 3, and the contents are displayed on the display unit 14, so that the state of the network is displayed. Be monitored. Further, a plurality of state change notifications are accumulated in the logging file 16 in time series by the message recording unit 15.

In the monitoring device 4, each data exchange 1
3 and the monitoring device 4 do not match (each data exchange 1 to 3)
3, the device state and the line state held by the state monitoring unit 5;
In order to prevent data inconsistency between the device status and the monitoring status held by the status management unit 13 of the monitoring device 4, the status inquiry requesting unit 10 is activated periodically. That is, the status inquiry request unit 10 sends a status inquiry command to the status inquiry editing unit 8 of each of the data exchanges 1 to 3 (FIG. 8).
Edit (see (b)). This status inquiry command is sent from the message transmission unit 11 to all the data exchanges 1 to
3 is sent.

In each of the data exchanges 1 to 3, when the message receiving unit 9 receives the status inquiry command, the status inquiry editing unit 8 is activated and inquires about the device status and the line status held by the status monitoring unit 5, The response data whose contents have been edited (see FIG. 8C) is generated, and the message transmission unit 7 notifies the monitoring device 4.

In the monitoring device 4, when the message receiving unit 12 receives response data from each of the data exchanges 1 to 3,
The status management unit 13 extracts and updates / holds the data of the device status and the line status from the response data, and the display device 14 displays the latest status based on the held content of the status management unit 13.
(See the sequence diagram of FIG. 9B). As a result, a state mismatch between each of the data exchanges 1 to 3 and the monitoring device 4 is prevented.

[0010]

However, in the network monitoring system shown in FIG. 7, if a failure occurs in a large number of devices or lines in the network at once, each of the data exchanges 1 to 3 switches to the monitoring device 4. A large number of state change notifications are forwarded. In this case, the monitoring device 4
In order to receive and process a large number of state change notifications, the state management unit 13, the display device 14, and the message recording unit 15
Performs processing continuously. In particular, the message recording unit 15
Since writing to the logging file 16 is performed, the processing time is longer than other processing.

Here, the state management unit 13, the display device 14,
The message recording unit 15 is a function realized by executing a program by a processor device such as a CPU (Central Processing Unit). Rises. As a result, the processing of any one of the state management unit 13, the display device 14, and the message recording unit 15 is delayed due to other processing, and in the worst case, the system may hang.

In order to avoid the above-mentioned congestion state, in the monitoring device 4, the CPU usage monitoring unit 17
When the usage rate exceeds a pre-registered specified value, the message receiving unit 12 discards the status change notification received from each of the data exchanges 1 to 3 so that the status management unit The CPU utilization is reduced by stopping the processing of the display 13, the display device 14, and the message recording unit 15.

However, if the state change notification is discarded,
An inconsistency in device status or line status occurs between each of the data exchanges 1 to 3 and the monitoring device 4. Therefore, the monitoring device 4
Thereafter, as described above, the status inquiry command is periodically transmitted to each of the data exchanges 1 to 3, and the monitoring device 4 receives the response data, thereby eliminating the status mismatch. Alternatively, when the CPU usage rate of the monitoring device 4 falls below a predetermined value registered in advance, the status inconsistency is resolved by actively transmitting a status inquiry command.

However, in the technique of reducing the CPU usage rate by discarding the status change notification, the contents held in the status management unit 13 in the monitoring device 4 are maintained until the status inconsistency is eliminated by transmitting the status inquiry command described above. And the display content of the display device 14 does not match the actual state in the network. In addition, there is a problem that a state change notification to be stored in the logging file 16 is lost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables a monitoring device to perform congestion control while monitoring a network, and to match the display content of a display device with an actual network state. It is an object of the present invention to provide a network monitoring system that can eliminate data loss in a logging file.

[0016]

The present invention employs the following configuration to solve the above-mentioned problems. That is, according to the first aspect of the present invention, there is provided a network including a plurality of data exchanges for transmitting a state change notification including state data of a network and holding the state change notification, and transmitting the state change notification from each of the data exchanges connected to the network. A network monitoring system comprising: a monitoring device that receives a status change notification that has been sent, wherein the monitoring device extracts and holds network status data from the status change notification received from each of the data exchanges; and Display means for displaying the content based on the state data of the network held in the state management means, storage means for holding the state change notice received from each of the data exchanges, and recording the state change notice in the storage means First recording means;
A congestion state detecting means for detecting a congestion state in the monitoring device; a recording stop means for stopping the operation of the first recording means when the congestion detection means detects the occurrence of congestion; When the first is detected,
Recording restart means for restarting the operation of the recording means;
When the recording means resumes its operation, the inquiry means inquires each of the data exchanges of a status change notification that has been discarded without being recorded in the storage means due to the stoppage of the operation of the first recording means; And a second recording means for recording, in the storage means, a status change notification transmitted from each of the data exchanges in response to the inquiry.

According to the first aspect of the present invention, when the monitoring device receives the status change notification sent from each data exchange,
The state management means, the display means, and the first recording means operate. At this time, if the occurrence of congestion in the monitoring device is detected, the operation of the first recording unit stops. As a result, the load on the processor (eg, CPU) for operating the state management unit, the display unit, and the first recording unit is reduced, and the increase in the usage rate is suppressed. As described above, even if congestion occurs, congestion control is performed while monitoring the network by the state management unit. When the congestion release in the monitoring device is detected, the operation of the first recording unit is restarted, and the status change notification discarded at the time of congestion is obtained from each data exchange and stored in the storage unit. This eliminates the lack of the status change notification in the storage unit.

Here, examples of the data exchange include a packet exchange, a frame relay exchange, and an ATM exchange. The status of the network includes, for example, the status of devices (CPU, MPU, CC, memory device) inside each data exchange, or the status of a line.

According to a second aspect of the present invention, there is provided a network including a plurality of data exchanges for transmitting a status change notification including network status data and holding the status change notification, and transmitting the status change notification from each of the data exchanges connected to the network. A network monitoring system comprising a monitoring device that receives the status change notification, wherein the monitoring device extracts and holds network status data from the status change notification received from each of the data exchanges; and Display means for displaying the content based on the state data of the network held in the state management means, congestion state detection means for detecting the congestion state in the monitoring device, and when the congestion detection means detects the occurrence of congestion Display stop means for stopping the operation of the display means, and the display means has stopped operation The latest data holding means for holding the state data of the network included in the latest one of the state change notifications transmitted from each of the data exchanges, and the congestion detection means when the congestion detection means detects congestion release A latest state display means for displaying on the display means a content based on the network state data held in the latest data holding means, and a content based on the network state data held in the latest data holding means. And a display resuming means for resuming the operation of the display means after the display means is displayed on the display means.

According to the second aspect of the present invention, when the monitoring device receives the status change notification sent from each data exchange,
The state management means and the display means operate. At this time, when the occurrence of congestion in the monitoring device is detected, the operation of the display means stops. When the display unit stops operating, the latest network state data is held in the latest data holding unit. Thereafter, when the congestion release in the monitoring device is detected, the contents held by the latest data holding unit are displayed on the display unit, and thereafter, the operation of the display unit is restarted.

As described above, while the congestion occurs, the operation of the display means is stopped, so that the load on the processor such as the CPU for operating the state management means and the display means is reduced, and the usage rate is reduced. Reduction is achieved. That is, even if congestion occurs, congestion control is performed while monitoring the network by the state management unit. Also, when the congestion is released,
By displaying the content based on the latest network status data on the display unit, it is possible to prevent a state different from the actual state from being displayed on the display unit as in the related art.

According to a third aspect of the present invention, in the monitoring apparatus according to the first aspect, a display stop means for stopping the operation of the display means when the congestion detection means detects the occurrence of congestion, and the display means operates the display means. The latest data holding means for holding the state data of the network included in the latest one of the state change notifications transmitted from each of the data exchanges when stopped, and when the congestion detection means detects congestion release A latest state display means for displaying on the display means the contents based on the network state data held in the latest data holding means, and the latest state display means displays the network state data held in the latest data holding means. Display restart means for restarting the operation of the display means after displaying the contents based on the display means. That.

The invention of claim 3 is a combination of the invention of claim 1 and the invention of claim 2. As a result, when congestion occurs, only the state management means among the state management means, the display means, and the first recording means performs processing for the state change notification.
The load on the CPU and the like can be reduced as compared with the invention of the third aspect, and the processing delay of the state management means can be prevented.

According to a fourth aspect of the present invention, the recording stop means according to the third aspect is activated when the congestion state detecting means detects the occurrence of a slight congestion in the monitoring device, and the recording resuming means detects the congestion state detection. The means is activated when detecting a slight congestion release in the monitoring device, the display stop means is activated when the congestion state detecting means detects the occurrence of severe congestion in the monitoring device, and the latest state display means is It is specified by being activated when the congestion state detecting means detects severe congestion release in the monitoring device.

According to the fourth aspect of the present invention, the display means, the first
The operation of the recording means can be changed according to the degree of congestion.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a network monitoring system according to an embodiment of the present invention will be described with reference to the drawings. [Network Monitoring System] FIG. 1 is a functional block diagram of the network monitoring system according to the embodiment. In FIG. 1, the network monitoring system includes a network including data exchanges 1 to 3 such as a packet, a frame relay, and an ATM connected via a trunk line, and a monitoring device 40 connected to the network.

In FIG. 1, the same components as those of the related art are denoted by the same reference numerals as those of the conventional network monitoring system shown in FIG. Further, the network in the present embodiment includes the data exchanges 1 to 3, but the number of data exchanges does not matter.

[Data Exchange] In FIG. 1, the data exchanges 1 to 3 have the same components, so the data exchange 1 will be described as an example. Data exchange 1
Is composed of a CPU, a memory device such as a ROM and a RAM, a channel controller (CC), a line corresponding unit, a switch, etc.
When the CPU executes the program stored in the memory device, the CPU functions as a device including the state monitoring unit 5, the message editing unit 6, the message transmitting unit 7, the state inquiry editing unit 8, and the message receiving unit 9.

Here, the state monitoring unit 5 is provided with the data exchange 1
Monitor the status of the devices (CPU, CC, memory device, etc.) and the status of the line, and maintain the status of these devices and the status of the line.
Further, when detecting a device failure or a line failure, the state monitoring unit 5 gives the message editing unit an editing request for a state change notification (failure message) for notifying the monitoring unit 40 of the detection. Further, the state monitoring unit 5 holds the state change notification generated by the message editing unit 6 in a time series.

The message editing unit 6 starts upon receiving an editing request for a status change notification from the status monitoring unit 5, generates a status change notification including data indicating the status of the failed device or line, and generates a message. This is given to the transmission unit 7.

The message receiving unit 9 receives the status inquiry command transmitted from the monitoring device 40 and gives it to the status inquiry editing unit 8. Status inquiry editing unit 8
Receives the status inquiry command from the message receiving unit 9 and starts up, inquires the status monitoring unit 5 about the device status and the line status, generates response data based on the inquiry result, and gives it to the message transmitting unit 7.

The message transmitting unit 7 transmits the status change notification received from the message editing unit 6 or the response data received from the status inquiry editing unit 8 to the monitoring device 40.

[Monitoring device] In FIG.
Are hardware, CPU, CC, memory device
(Neither is shown), etc.
U executes the program stored in the memory device, and the status inquiry requesting unit 10, the message transmitting unit 11, the message receiving unit 12, the status managing unit 13, the display device 14, the message recording unit 15, the logging file
(Status change storage area) 16 and CPU utilization monitoring unit 1
7 functions as an apparatus.

Further, the monitoring device 40 includes a congestion occurrence / release detection unit 21, a recording stop / restart unit 22, a recording combination unit 23, a display stop / restart unit 24, and a latest state recording control unit 25 as a configuration according to the present invention. , The latest status recording unit 26, the latest status change storage area 27, and the latest status display unit 28.

Here, the status inquiry requesting unit 10 is started periodically, generates a status inquiry command for acquiring the device status and the line status of each of the data exchanges 1 to 3, and gives it to the message transmitting unit 11. Further, the status inquiry request unit 10 is configured to receive a light congestion release notification from the congestion occurrence / release detection unit 21, and in this case also generates a status inquiry command (corresponding to an inquiry means).

The message transmitting unit 11 is connected to the status inquiry requesting unit 10, and the status inquiry requesting unit 1
The status inquiry command received from 0 is transmitted to each of the data exchanges 1 to 3.

The message receiving unit 12 receives the status change notification or the response data transmitted from each of the data exchanges 1 to 3, and sends them to the status management unit 13 and the message recording unit 1.
5, which is given to either the record combining unit 23 or the latest state record control unit 25.

[0038] The state management unit 13 includes the message receiving unit 12.
And updates and retains the device status or line status data contained therein (corresponding to the status management means), and issues an instruction to display the content of the status change notification held by itself. It is given to the display device 14.

The display device 14 is a CRT (cathode ray tube), LC
The display device includes a display device configured using D (liquid crystal display) and the like, and a display control circuit and the like that performs display processing of images and the like on the display device. The display device 14
The content of the status change notification is displayed in color, text, or the like, and the monitoring device 4
The status in the network is transmitted to the operator 0 (corresponding to display means).

The message recording unit 15 receives the status change notification from the message receiving unit 12, and records the status change notification in the logging file 16 in chronological order (corresponding to a first recording unit).

The logging file 16 retains status change notifications received from each of the data exchanges 1 to 3 in chronological order.
(Equivalent to storage means). The CPU usage monitoring unit 17 monitors the usage of a CPU (not shown) accompanying execution of each unit of the monitoring device 40 such as the status management unit 13, the display device 14, and the message recording unit 15.

The congestion occurrence / cancellation detection unit 21 is provided for a predetermined time.
Every time (for example, 10 seconds) elapses, the CPU usage monitoring unit 17 is inquired of the CPU usage rate, and if the usage rate exceeds the specified value, it is determined that mild or severe congestion has occurred. However, if the CPU usage rate is below the specified value,
It is determined that the mild or severe congestion state has been released (corresponding to the congestion state detection means).

When the congestion occurrence / release detection unit 21 determines that a slight congestion has occurred, it notifies the recording stop / restart unit 22 of a light congestion occurrence notification. When the congestion occurrence / release detection unit 21 determines that the mild congestion has been released, the congestion occurrence / release detection unit 21 notifies the recording stop / restart unit 22 and the recording combination unit 23 of a light congestion release notification.

When the congestion occurrence / release detection unit 21 determines that severe congestion has occurred, it notifies the display stop / restart unit 24 and the latest state recording control unit 25 of the notice of occurrence of severe congestion. . The congestion occurrence / release detection unit 21
When it is determined that the severe congestion has been released, the severe congestion release notification is given to the display stop / resume unit 24, the latest state recording control unit 25, and the latest state display unit 28.

The recording stop / resume unit 22 receives the notification of the occurrence of the mild congestion from the congestion occurrence / release detection unit 21. In this case, the recording stop / resume unit 22 outputs the message recording unit 15
To stop the writing process to the logging file 16 (corresponding to a recording stop unit). On the other hand, the recording stop / resume unit 2
2 receives a light congestion release notification from the congestion occurrence / release detection unit 21. In this case, the recording stop / resume unit 22
The writing process to the logging file by the message recording unit 15 is restarted (corresponding to a recording restart unit).

The record combining unit 23 receives a light congestion release notification from the congestion occurrence / release detection unit 21. At this time, the recording combining unit 23 receives the response data received by the message receiving unit 12, extracts a state change notification from the response data, and, among the extracted state change notifications, has not yet been recorded in the logging file 16 (missing State change notifications are recorded in the logging file 16 in chronological order.
(Corresponding to the second recording means).

The display stop / restart unit 24 receives a notice of occurrence of severe congestion from the congestion occurrence / release detection unit 21. In this case, the display stop / restart unit 24 stops the processing by the display device 14 (corresponding to a display stop unit). On the other hand, the display stop / restart unit 24 receives a severe congestion release notification from the congestion occurrence / release detection unit 21. In this case, the display stop / restart unit 24 restarts the processing by the display device 14 (corresponding to a display restart unit).

The latest state recording control unit 25 receives a notice of occurrence of severe congestion from the congestion occurrence / release detection unit 21. In this case, the latest status recording control unit 25
For 6, the writing of the device status and the line status received by the message receiving unit 12 is started. On the other hand, the latest state recording control unit 25 receives a severe congestion release notification from the congestion occurrence / release detection unit 21. In this case, the latest status recording control unit 25 stops writing the device status and the line status received by the message receiving unit 12 to the latest status recording unit 26, and updates the contents held in the latest status recording unit 26 to the latest status. Write to the state change storage area 27.

The latest status recording unit 26 stores the device status in the data exchanges 1 to 3 received by the message receiving unit 12 from the time when the latest status recording control unit 25 receives the notification of occurrence of severe congestion until the notification of severe congestion is released. Alternatively, the latest line status is held for each device and each line.

The latest state change storage area 27 holds the contents held by the latest state recording unit 26. That is, as shown in FIG. 3D, the latest information about the device type (device and line type) and the corresponding status change notification signal (whether normal or faulty) is held (the latest data holding means). Equivalent).

The latest status display section 28 receives a severe congestion release notification from the congestion occurrence / release detection section 21. in this case,
The latest status display unit 28 causes the display device 14 to display colors and characters indicating the contents of the device status and the line status stored in the latest status change storage area 27 (corresponding to the latest status display means).

[Process in Network Monitoring System] Next, the process in the network monitoring system shown in FIG. 1 will be described. <Normal Processing> First, normal processing in the network monitoring system will be described. This normal processing is the same processing as the above-described conventional processing. That is, each of the data exchanges 1 to 3 shown in FIG. 1 monitors its own device status and line status, and when a fault occurs in the device or line, a status change notification (failure message: FIG. Is generated and transmitted to the monitoring device 40. Then, in the monitoring device 40, the device status or the line status included in the status change notification is held in the status management unit 13, the contents thereof are displayed on the display device 14, and the status change notification is further transmitted to the message recording unit 15. Is recorded in the logging file 16.

The monitoring device 40 transmits a status inquiry command to each of the data exchanges 1 to 3 for asking the device status and the line status in each of the data exchanges 1 to 3, and sends response data corresponding to the status inquiry command. The device status or line status received from each of the data exchanges 1 to 3 and included in each response data is held in the status management unit 13, and the contents are displayed on the display device 14.

<Congestion Monitoring Process> When the above-described normal process is being executed by the network monitoring system, the congestion occurrence / release detection unit 21 of the monitoring device 40
Monitor the congestion state at. FIG. 2 is a flowchart showing a congestion state monitoring process by the congestion occurrence / release detection unit 21.

As shown in FIG. 2, the congestion occurrence / release detection unit 21 obtains the CPU utilization (not shown) of the monitoring device 40 from the CPU utilization monitoring unit 17 every 10 seconds, and executes the congestion state monitoring processing. It is configured to start execution.

When the congestion state monitoring process starts, first, the congestion occurrence / release detection unit 21 sets the CPU usage rate to 80
It is determined whether or not the condition of not less than 90% and less than 90% is satisfied (S
01). At this time, if the condition is satisfied (S01; YE
In S), the process proceeds to S02, and when the process is not satisfied (S01; NO), the process proceeds to S04.

When the process has proceeded to S02, the congestion occurrence / release detection unit 21 determines the current congestion state. At this time, the congestion occurrence / release detection unit 21 ends the congestion state monitoring process when it is determined that the mild congestion has already occurred.
On the other hand, when the congestion occurrence / release detection unit 21 determines that the light congestion is in the light congestion state and has not yet transmitted the light congestion occurrence notification, the light congestion occurrence notification is transmitted to the recording stop / restart unit 22 and the (S0)
3) End the congestion state monitoring process.

When the process proceeds to S04, the congestion occurrence / release detection unit 21 determines whether the CPU utilization satisfies the condition of 90% or more. At this time, if the condition is satisfied (S04; YES), the process proceeds to S05, and if the process is not satisfied (S04; NO), the process proceeds to S0.
Proceed to 7.

When the process has proceeded to S05, the congestion occurrence / release detection unit 21 determines the current congestion state. At this time, if the congestion occurrence / release detection unit 21 has already determined that severe congestion has occurred, the congestion state monitoring process ends.
On the other hand, when the congestion occurrence / release detection unit 21 determines that the severe congestion state is present and the severe congestion occurrence notification has not been transmitted yet, the severe congestion occurrence notification is displayed by the display stop / resume unit 24, and Send to latest status record control unit 25
(S06), the congestion state monitoring process ends.

If the processing has proceeded to S07, the congestion occurrence / release detection section 21 determines whether or not the CPU usage rate exceeds 60% and satisfies the condition of 70% or more. At this time, if the condition is satisfied (S07; YES), the process proceeds to S08, and if the process is not satisfied (S07; N)
In O), the process proceeds to S10.

When the processing has proceeded to S08, the congestion occurrence / release detection unit 21 determines the current congestion state. At this time, the congestion occurrence / release detection unit 21 ends the congestion state monitoring process when it is determined that the severe congestion has been released.
On the other hand, if the congestion occurrence / release detection unit 21 determines that the severe congestion occurrence notification is being performed (the severe congestion occurrence event is being executed), the severe congestion release notification is sent to the display stop / restart unit 2.
4, latest status record control unit 25, and latest status display unit 28
(S09), and terminates the congestion state monitoring process.

When the process has proceeded to S10, the congestion occurrence / release detection unit 21 determines whether or not the CPU utilization satisfies the condition of 60% or more. At this time, if the condition is satisfied (S10; YES), the process proceeds to S11, and if the process is not satisfied (S10; NO), the congestion state monitoring process ends.

When the process has proceeded to S11, the congestion occurrence / release detection unit 21 determines the current congestion state. At this time, the congestion occurrence / release detection unit 21 ends the congestion state monitoring process if it is already determined that the mild congestion has been released.
On the other hand, when the congestion occurrence / release detection unit 21 determines that the notification of the light congestion is being generated (the event of the heavy congestion occurrence is being executed), the light congestion release notification is sent to the status inquiry requesting unit 10, the recording stop / The data is sent to the resuming unit 22 and the recording combining unit 23 (S12), and the congestion state monitoring process ends.

As described above, the congestion occurrence / release detection unit 21
Sends a light congestion occurrence notification to execute a light congestion occurrence event when light congestion occurs. When severe congestion occurs, the congestion occurrence / release detection unit 21 sends a severe congestion occurrence notification to execute a severe congestion occurrence event. On the other hand, when the severe congestion is released, to execute the severe congestion release event,
A severe congestion release notification is sent. When the mild congestion is released, the congestion occurrence / release detection unit 21 sends a light congestion release notification to execute the light congestion release event.

<Mild Congestion Occurrence Event> The congestion state in the monitoring device 40 is monitored by the congestion state monitoring process described above. Here, it is assumed that a large number of device failures or line failures have occurred in the network, and a large number of state change notifications have been sent from the data exchanges 1 to 3 to the monitoring device 40.
Then, in the monitoring device 40, processing (normal processing) by the message receiving unit 12, the state management unit 13, the display device 14, and the message recording unit 15 is continuously performed, and as a result, the usage rate of the CPU (not shown) increases. I do.

Thus, the congestion occurrence / release detection unit 21
However, if it is determined that the CPU usage rate has risen to 80% or more and less than 90%, the monitoring device 40 determines that a slight congestion has occurred, and notifies the recording stop / restart unit 22 of the light congestion occurrence notification. By being given, a light congestion occurrence event is executed (see FIG. 4).

That is, the recording stop / resume unit 22 is activated by receiving the notification of the occurrence of the slight congestion, and the message recording unit 1 is activated.
5 is given a processing stop instruction. Then, the message recording unit 15 stops the process of recording the status change notification received by the message receiving unit 12 in the logging file 16. That is, the status change notification is discarded without being stored in the logging file 16.

As described above, the processing by the message recording unit 15 is stopped by the mild congestion occurrence event, so that the load on the CPU (not shown) is reduced by the processing by the message recording unit 15. Therefore, an increase in the CPU usage rate can be suppressed.

Further, the CPU time to be allocated to the processing by the message recording unit 15 can be allocated to the processing of the state management unit 13 and the display device 14.
Processing delays of the state management unit 13 and the display device 14 are suppressed.

<Severe congestion occurrence event> Even if the processing by the message recording unit 15 is stopped by the above-described light congestion occurrence event, the data exchanges 1 to 3
When the state change notification transmitted from the GW is enormous, the CPU utilization increases.

Thus, the congestion occurrence / release detection unit 21
However, if it is determined that the CPU usage rate is 90% or more, the monitoring device 40 determines that severe congestion has occurred, and sends the severed congestion to the display stop / resume unit 24 and the latest state recording control unit 25. By receiving the congestion occurrence notification, a severe congestion occurrence event is executed (see FIG. 5).

That is, the display stop / resume unit 24 is activated upon receiving the notice of occurrence of severe congestion, and gives a processing stop instruction to the display device 14. Then, the display device 14 stops the process of displaying the contents of the device status and the line status held in the status management unit 13. As a result, the display device 14 displays a screen indicating that a severe congestion occurrence event is occurring, on top of the content immediately before the stop of the processing.

On the other hand, the latest status record control unit 25 is activated by receiving the notice of occurrence of severe congestion, receives the device status and the line status in the plurality of status change notifications received by the message receiving unit 12, respectively. The latest one is written in the latest state recording unit 26.

As described above, the processing of the display device 14 in addition to the processing of the message recording unit 15 is stopped by the severe congestion occurrence event. Is further reduced, and the CPU usage rate can be reduced.

Further, since most of the CPU time for the processing for the status change notification received by the message receiving unit 12 can be allocated to the processing of the status management unit 13, the processing by the status management unit 13 can be appropriately performed without delay. Can be performed.

<Severe Congestion Release Event> When the above-described light congestion occurrence event and heavy congestion occurrence event are executed, the load on the CPU (not shown) of the monitoring device 40 is reduced.
CPU usage decreases.

As a result, the congestion occurrence / release detection unit 21
However, if it is determined that the CPU usage rate has exceeded 60% and has dropped to 70% or less, the monitoring device 40 determines that the severe congestion has been released and the display stop / restart unit 2
4, and the latest state recording control unit 25 and the latest state display unit 28 are notified of the severe congestion release. As a result, a severe congestion release event is executed (see FIG. 5).

That is, the latest status recording control unit 25 is activated by receiving the severe congestion release notification, and
6 is stopped, and at this time, the content held in the latest status recording unit 26 is written to the latest status change storage area 27.

Subsequently, the latest status display unit 28 is activated by receiving the severe congestion release notification, extracts the contents (device status, line status) held in the latest status change storage area 27, and
A screen corresponding to this content is displayed on the display device 14.

Then, the display stop / resume unit 24 is activated upon receiving the notice of the severe congestion release, and gives a processing restart instruction to the display device 14. Then, the display device 14
The process of displaying the contents of the device state and the line state held in the state management unit 13 is restarted.

As described above, after the latest device status and line status in each of the data exchanges 1 to 3 are displayed on the display device 14 by the severe congestion release event, the display device 1
4 is resumed. That is, the display device 14
When the PU usage rate becomes 90% or more, the display of the device status and the line status is stopped. When the congestion is reduced to some extent, the latest device status and the line status are displayed. The device status and the line status are displayed in the same manner as the status. Thus, it is possible to prevent the display content of the display device 14 from being different from the actual display content, which is a problem in the related art.

<Mild Congestion Release Event> The congestion occurrence / release detection unit 21
However, when it is determined that the CPU usage rate has dropped to 60% or less, the mild congestion release notification is given to the status inquiry requesting unit 10, the recording stop / restart unit 22, and the recording combining unit 23, so that the light congestion is released. A release event is executed (see FIG. 4).

That is, the recording stop / resume unit 22 is activated upon receiving the notification of the mild congestion release, and the message recording unit 2
2 is given a processing restart instruction. Then, the message recording unit 15 restarts the process of recording the status change notification received by the message receiving unit 12 in the logging file 16.

Subsequently, the status inquiry requesting unit 10 is activated upon receiving the notification of the mild congestion release, and generates a status inquiry command (see FIG. 3B). This status inquiry command is transmitted from the message transmission unit 11 to each of the data exchanges 1 to 3.

In each of the data exchanges 1 to 3, in response to the status inquiry command received by the message receiving unit 9, the status inquiry editing unit 8 transmits the corresponding status change notification (event start time in the command) from the status monitoring unit 5. , And a response data including the status change notification (see FIG. 3C).
Is generated and transmitted from the message transmission unit 7 to the monitoring device 40.

In the monitoring device 40, the record combining unit 23 started by receiving the notification of the mild congestion release receives the response data received by the message receiving unit 12. Then, the record combining unit 23 extracts a state change notification from the response data. Subsequently, the recording combining unit 23 refers to the accumulated contents of the logging file 16 and stores, in the logging file 16, the status change notifications extracted from the response data that are not accumulated in the logging file 16 in chronological order. .

As described above, when the mild congestion in the monitoring device 40 is released by the mild congestion release event,
The status change notifications discarded without being accumulated in the logging file 16 due to the light congestion occurrence event are acquired from each of the data exchanges 1 to 3 and accumulated in the logging file 16. As a result, it is possible to solve the problem of the state change notification in the logging file 16 which has been a problem in the related art.

The above-described normal processing, the processing relating to the light congestion occurrence / release event and the heavy congestion occurrence / release event are as follows.
The sequence diagram is as shown in FIG.

[Effects of the Embodiment] According to the network monitoring system of the present embodiment, the monitoring device 40 stops the processing of the message recording unit 15 requiring a relatively large CPU time in a lightly congested state. 13
In addition, it is possible to prevent the processing of the display device 14 from being delayed. In the severe congestion state, the processing of the display device 14 is further stopped.
The processing of the state management unit 13 can be performed without delay. Then, by stopping the processing of the message recording unit 15 and the display device 14, an increase in the CPU usage rate can be suppressed.
It is possible to prevent the monitoring device 40 from going into a system hung state.

Then, the CPU usage rate falls below the specified value,
When the severe congestion is released, by displaying the latest state on the display device 14, it is possible to prevent the display content of the display device 14 from being different from the actual content. Further, when the mild congestion is released, from the data exchanges 1 to 3,
Since the monitoring apparatus 40 acquires the status change notification discarded when congestion occurs and accumulates the notification in the logging file 16, there is no loss of data in the logging file 16 unlike the related art.

Further, even when the mild / severe congestion occurrence event is executed, the processing by the state management unit 13 is not stopped. That is, the state management unit 13 extracts and holds the device state and the line state from the state change notification received by the message receiving unit 12 even at the time of congestion. As described above, according to the present embodiment, the network can be monitored even when congestion occurs in the monitoring device 40.

In this embodiment, the CPU usage is monitored and the congestion state is determined based on the CPU usage. However, instead of the CPU usage, the queue length for processing and system resources (for example, memory (A device or the like) may be monitored, and a congestion state may be determined based on the monitored usage.

[0093]

According to the network monitoring system of the present invention, the monitoring device can perform congestion control while monitoring the network, and can match the display content of the display device with the actual state in the network. Data loss in a file can be eliminated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a network monitoring system according to an embodiment of the present invention;

FIG. 2 is a flowchart showing a congestion state monitoring process in the monitoring device.

FIG. 3 is an explanatory diagram of a network monitoring system according to the embodiment;

FIG. 4 is a flowchart showing processing in a light congestion occurrence / release event;

FIG. 5 is a flowchart showing processing in a severe congestion occurrence / release event;

FIG. 6 is a sequence diagram showing a congestion occurrence / release event;

FIG. 7 is a configuration diagram of a conventional network monitoring system.

FIG. 8 is an explanatory diagram of a conventional network monitoring system.

FIG. 9 is a sequence diagram showing processing in a conventional network monitoring system.

[Explanation of symbols]

1 to 3 data exchange 5 status monitoring unit 6 message editing unit 7 message transmission unit 8 status inquiry editing unit 9 message reception unit 10 status inquiry request unit (inquiry means) 11 message transmission unit 12 message reception unit 13 state management unit (state management) Means) 14 display device (display means) 15 message recording section (first recording means) 16 logging file (storage means) 21 congestion occurrence / release detection section (congestion state detection means) 22 recording stop / restart section (recording stop means, (Recording resuming means) 23 Recording combining section (second recording means) 24 Display stop / resume section (Display stopping means, Display resuming means) 25 Latest state recording control section 26 Latest state recording section 27 Latest state change storage area (Latest data holding area) Means) 28 latest status display unit (latest status display means) 40 monitoring device

Claims (4)

[Claims] 1. A network comprising a plurality of data exchanges for transmitting a status change notification including status data of a network and holding the status change notification, and a status change notification transmitted from each of the data exchanges connected to the network. A network monitoring system comprising: a monitoring device that receives network status data from the status change notification received from each of the data exchanges; and Display means for displaying the content based on the network state data stored in the storage device; storage means for storing the state change notification received from each of the data exchanges; and first recording for recording the state change notification in the storage means. Means, a congestion state detecting means for detecting a congestion state in the monitoring device, Recording stop means for stopping the operation of the first recording means when the congestion detection means detects the occurrence of congestion, and recording for restarting the operation of the first recording means when the congestion state detection means detects the release of congestion A resuming unit, and an inquiry for inquiring each of the data exchanges of a state change notification discarded without being recorded in the storage unit due to the stop of the operation of the first recording unit when the first recording unit resumes operation. And a second recording unit for recording, in the storage unit, a status change notification transmitted from each of the data exchanges in response to the inquiry by the inquiry unit. 2. A network comprising a plurality of data exchanges for transmitting a status change notification including status data of the network and holding the status change notification, and a status change notification connected to the network and transmitted from each of the data exchanges. A network monitoring system comprising: a monitoring device that receives network status data from the status change notification received from each of the data exchanges; and Display means for displaying the content based on the network state data held in the monitoring device; congestion state detection means for detecting a congestion state in the monitoring device; operation of the display means when the congestion detection means detects the occurrence of congestion Display stop means for stopping the operation, and the respective data when the display means stops operating. Data holding means for holding network state data contained in the latest one of the state change notifications transmitted from the data exchange, and the latest data holding means when the congestion detecting means detects congestion release. Latest status display means for displaying the content based on the network status data held in the display means on the display means, and the latest status display means displays the content based on the network status data held in the latest data storage means in the display means And a display resuming means for resuming the operation of the display means after having been displayed on the network monitor system. 3. The monitoring device, comprising: a display stop means for stopping the operation of the display means when the congestion detection means detects the occurrence of congestion; and a display stop means for stopping the operation of the display means from each of the data exchanges. Latest data holding means for holding network status data included in the latest one of the status change notifications transmitted respectively, and the latest data holding means when the congestion detecting means detects congestion release, Latest state display means for displaying the contents based on the network state data on the display means, and the latest state display means causes the display means to display contents based on the network state data held in the latest data holding means. 2. The network monitoring system according to claim 1, further comprising a display resuming unit for resuming the operation of the display unit after the operation. system. 4. The recording stop means is activated when the congestion state detecting means detects the occurrence of mild congestion in a monitoring device, and the recording resuming means is executed when the congestion state detecting means detects light congestion in a monitoring device. Activated when the release is detected, The display stop means is activated when the congestion state detection means detects the occurrence of severe congestion in the monitoring device, and the latest state display means is monitored by the congestion state detection means. 4. The network monitoring system according to claim 3, wherein the network monitoring system is activated when a severe congestion release in the device is detected.