JP2763240B2 - Network management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network management method for monitoring a communication state of a managed device in a data communication network.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a data communication network using a conventional network management method. The data communication network comprises a coaxial bus 1 and host computers 5 and 6 connected to the coaxial bus 1 via taps 2, 3 and 4, respectively.
And a network management device 7.

[0003] Then, the host computer 5 statistical values such as transmission and reception times of the data, and a transmission line noise frequency and management information file 8 that records the failure status, such as incorrect data receiving frequency, the contents of the management information file 8 And a processing unit 9 for reading out and transmitting the same to the network management apparatus 7. Similarly, the host computer 6 includes a management information file 11 for recording various statistical values of the communication state of the own device and a failure state, a processing unit 12 for reading the contents of the management information file 11 and transmitting the content to the network management device 7. Having. As shown in FIG. 5, the management information files 8 and 11 have a record configuration including items and management information values corresponding thereto.

The network management device 7 includes a definition information file 14 for the managed device in which the model, communication protocol, communication speed, and network address of the managed device in the data communication network are stored. 14, a processing unit 15 for reading the contents of the management information file of the managed device via the network, a management information database 16 for storing the contents of the read management information file, and a management information database 16 And an output device 17 that outputs a result of analysis of the data stored in the storage unit 15 by the processing unit 15.

A data communication network using the conventional network management method is configured as described above. For example, when reading the management information file 8 of the host computer 5, it operates according to the flowchart shown in FIG.

In step S 101, the processing unit 15 of the network management device 7 first sets a communication path with the host computer 5. Next, in step S102, the processing unit 15 of the network management device 7 requests the host computer 5 to transfer the management information values of the items A to E of the management information file 8 to the network management device 7.

Next, in step S105, the processing unit 9 of the host computer 5 receives the transmission request from the network management device 7, reads out the management information values of the requested items A to E from the management information file 8, Step S108
Then, the processing unit 9 of the host computer 5 transmits the management information values of all the items A to E read out in the above step S105 to the network management device 7.

Further, in step S110, the processing unit 15 of the network management device 7 stores the management information value of the management information file received from the host computer 5 in the management information database 16, and in step S111, The processing unit 15 reads the management information file data stored in the management information database 16 and
The data is analyzed and the result is output to the output device 17.

[0009]

Since the conventional network management method is configured as described above, when the managed device transmits the management information value of the management information file to the network management device, it transmits the management information value after the previous transmission. Regardless of whether or not the management information value has changed, all the management information values of the management information file must be transmitted for all necessary items.

Some management information, such as the number of times of data transmission and reception, has a value that changes greatly in a relatively short time.
In some cases, such as the number of noise occurrences, the value does not usually change significantly. Therefore, when the network management device frequently requests the managed device to transmit the management information, information whose value does not change much flows on the transmission path many times. Therefore, when communication is performed by an application other than the network management, a transmission delay of several seconds may occur, and the response performance is reduced, resulting in an increase in the load on the entire data communication network.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is intended to reduce the amount of data flowing on a transmission line for the purpose of network management and reduce the load on the entire data communication network. The aim is to get the method.

[0012]

According to a first aspect of the present invention, there is provided a network management method, wherein a management information value of a management information file previously transmitted to a network management apparatus is stored in a management information file of a managed apparatus in a data communication network. By providing a transmission record column for recording, the managed device transmits the management information value of the management information file to the network management device, and simultaneously records the transmitted management information value in the transmission record column. .

Also, for each item of the management information file, an interval for notifying the network management device of the management information value when the absolute value of the difference between the management information value and the value of the transmission record column reaches that value. The value is set.

[0014] Network management method according to the second invention, the management information file included in the managed devices in a data communication network, providing the transmission time field for recording the last time the time was transmitted to the network management device management information value Thus, the managed device transmits the management information value of the management information file to the network management device, and at the same time, records the transmission time in the transmission time column.

Further, a transmission time interval for notifying the network management device of the management information value when a certain time has elapsed from the last transmission time is set for each item of the management information file. .

[0016]

The network management method according to the first invention is characterized in that when the managed device transmits the management information value of the management information file to the network management device, the absolute value of the difference between the management information value and the value in the transmission record column is determined. Only the management information value of the item whose value is larger than the interval value is transmitted. Then, the managed device records the transmitted management information value in the transmission record column.

In the network management method according to a second aspect of the present invention, when the managed device transmits the management information value of the management information file to the network management device, the current time is calculated based on the transmission time from the time recorded in the transmission time column. Only the management information value of the item that has passed the time set in the interval or more is transmitted. Then, the managed device records the transmission time in the transmission time column.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a network management method according to the present invention will be described below with reference to the drawings in the order of [Embodiment 1], [Embodiment 2], [Embodiment 3], and [Embodiment 4].

Embodiment 1 FIG. 1 is a block diagram showing an example of a data communication network using a network management method according to the present invention. The data communication network comprises a coaxial bus 1 and host computers 5 and 6 connected to the coaxial bus 1 via taps 2, 3 and 4, respectively.
And a network management device 7.

[0020] Then, the host computer 5 includes a management information file 8 records various statistics and failure status of the communication state of the apparatus, a network managed by and <br/> read out the contents of the management information file 8 It has a processing unit 9 for transmitting to the device 7 and a judging unit 10 for judging whether to transmit the management information value of the management information file 8 to the network management device 7. Similarly, the host computer 6 includes a management information file 11 for recording various statistical values of the communication state of the own device and a failure state, a processing unit 12 for reading the contents of the management information file 11 and transmitting the content to the network management device 7. And a determining unit 13 for determining whether to transmit the management information value of the management information file 11 to the network management apparatus 7.

As shown in FIG. 2, the management information files 8 and 11 include items, management information values corresponding to the items, a transmission record column for recording the management information value transmitted to the network management device 7 last time, an interval value, This is a record configuration including a transmission time column for recording the time when the management information value was transmitted to the network management device last time, and a transmission time interval.

The interval value greatly changes in a relatively short time, such as the number of data transmissions and receptions, for each item of the management information files 8 and 11, but it is not necessary to notify the network management device 7 frequently. The better the item, the larger the value can be set. Further, although the change does not usually change so much like the number of times of noise occurrence, a small value can be set for an item which needs to be notified to the network management device 7 even if the change is small.

The transmission time interval can be set to a larger value for each item of the management information files 8 and 11 for items that do not need to be notified to the network management device 7 as frequently as data transmission / reception times. It has become. In addition, a small value can be set for items that need to be notified to the network management device 7 at relatively short intervals, such as the number of noise occurrences.

FIG. 2 shows that item A is the number of data transmissions, item B
Indicates the number of times data has been received, item C indicates the number of times data has been retransmitted, item D indicates the number of times data has been received incorrectly, and item E indicates the number of times noise has occurred.

In the first embodiment, the value greatly changes in a relatively short time, but frequently changes.
The interval values of items A, B, and C that do not need to be notified are set to be large, and the interval values of items D and E, which must be notified to the network management device 7 even if the value changes small, are set to be small. I have.

Further, the transmission time intervals of the items A, B and C which do not need to be frequently notified to the network management device 7 are set large, and the item D which must be notified to the network management device 7 at short intervals is set. And the transmission time interval of E is set small.

On the other hand, the network management device 7 includes a definition information file 14 of the managed device in which the model, communication protocol, communication speed, and network address of the managed device in the data communication network are stored. a processing unit 15 that 14 reference to read the contents of the management information file on the host computer 5 and 6 is managed device via the network, management information data for storing the contents of the read management information file <br / > A base 16 and an output device 17 for outputting a result of analysis of the data stored in the management information database 16 by the processing unit 15.

Next, the operation of the first embodiment will be described with reference to FIGS. 1, 2 and 3. FIG. 3 is a flowchart illustrating the operation of the first embodiment.

In step S101, the processing unit 15 of the network management device 7 first sets a communication path with the host computer 5, and in step S102, the processing unit 15 of the network management device 7 Then, a request is made to transmit the management information values of the items A to E of the management information file 8 to the network management device 7.

Next, in step S103, the judgment unit 10 of the host computer 5 receives the transmission request from the network management device 7, and receives the time and transmission time recorded in the transmission time column of the requested items A to E. The time interval is read from the management information file 8, and in step S104, if the current time is longer than the time indicated in the transmission time interval from the transmission time read in step S103, the process proceeds to step S105. Proceed to step S111.

After that, in step S105, the processing unit 9 of the host computer 5 reads from the management information file 8 the management information value of the item for which it has been determined that the predetermined time has elapsed in step S104. For example, if the current time is 10
When the management information file 8 has the contents as shown in FIG.
Stores the management information values of A, B and C among the items requested by the network management device 7 in the management information file 8
Read from

Next, in step S106, the determination unit 10 of the host computer 5 determines the absolute value of the difference between the management information values of the items A, B and C read out in step S105 and the values stored in the transmission record column. Calculate the value and step S
At 107, if the interval value set for each item is smaller than the value calculated at step S106, the process proceeds to step S108, and if it is larger, the process proceeds to step S111.

In step S108, the processing unit 9 of the host computer 5 determines the management information value of the item for which it is determined in step S107 that the absolute value of the difference between the management information value and the value in the transmission record column is larger than the interval value. It is transmitted to the network management device 7. For example, the management information file 8
Is the content shown in FIG. 2, the determination unit 10 of the host computer 5 determines that the absolute value of the difference between the management information value and the value in the transmission record column is larger than the interval value in item B
The processing unit 9 receives this determination and transmits only the management information value of the item B to the network management device 7.

Next, in step S109, the processing unit 9 of the host computer 5 writes the management information value of item B transmitted in step S108 in the transmission record column of item B. At the same time, the current time is written in the transmission time column of item B, and in step S110, the processing unit 15 of the network management device 7 stores the management information value of the management information file received from the host computer 5 in the management information database 16
In step S111, the processing unit 15 of the network management device 7
The management information file data stored in the storage device is read, the data is analyzed, and the result is output to the output device 17.

Based on the same flowchart as FIG. 3,
The processing unit 15 of the network management device 7 sets a communication path with the host computer 6. Then, item A of the management information file 11 is sent to the host computer 6.
ＥE to the network management device 7.

When receiving the transmission request from the network management device 7, the processing unit 12 of the host computer 6 sets the current time among the requested items A to E to the transmission time interval from the time recorded in the transmission time column. Is read from the management information file 11, and the determination unit 13 of the host computer 6 compares the management information value of the read item with the value of the transmission record column, and The processing unit 12 transmits only the management information value of the item whose absolute value of the difference is larger than the interval value to the network management device 7. Then, the content of the transmission record column is rewritten with the transmitted management information value. At the same time, the current time is recorded in the transmission time column of the transmitted item.

The processing unit 15 of the network management device 7
Management information in the management information file from the host computer 6
Upon receiving the value , the management information value is stored in the management information database 16. Then, the processing unit 15 reads the management information file data stored in the management information database 16, analyzes the data, and outputs the result to the output device 17.
Output to

Second Embodiment Next, a second embodiment according to the present invention will be described. In the first embodiment, when the managed device determines which item of the management information value in the management information file is to be transmitted to the network management device 7, both the first and second inventions are used. However, the same effect can be obtained by implementing any one of them.

Third Embodiment In the first embodiment, the interval value and the transmission time interval in the management information file are set by manual operation. The setting may be made automatically in consideration of the degree and the load status of the transmission path.

Fourth Embodiment Although the first to third embodiments have been described for the case of a data communication network using a coaxial bus, other media such as an optical loop may be used. It has the same effect as. For example, in a data communication network using an optical loop, the coaxial bus 1 changes to an optical loop,
3 and 4 turn into optical loop join adapters.

[0041]

As described above, according to the first aspect of the present invention, the
By providing a transmission record column and an interval value for each item of the management information file of the management device, it is possible to identify a change in the value of each item of the management information file, and to manage items whose values have changed by a certain amount or more. Since only the information value is transmitted to the network management device, there is an effect that the amount of data to be transmitted is suppressed and the load on the entire data communication network can be reduced.

According to the second aspect of the present invention, by providing a transmission time column and a transmission time interval for each item of the management information file of the managed device, the management information of the item that has passed a predetermined time or more from the previous transmission time is provided. Since only the value is transmitted to the network management device, there is an effect that the amount of data to be transmitted is suppressed and the load on the entire data communication network can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data communication network using a network management method according to the present invention.

FIG. 2 is an explanatory diagram showing a record configuration of a management information file of the network management method according to the present invention.

FIG. 3 is a flowchart showing an operation of the network management method according to the present invention.

FIG. 4 is a block diagram showing a configuration of a data communication network using a conventional network management method.

FIG. 5 is an explanatory diagram showing a record configuration of a management information file of a conventional network management method.

FIG. 6 is a flowchart showing an operation of a conventional network management method.

[Explanation of symbols]

 Reference Signs List 1 coaxial bus 2 tap 3 tap 4 tap 5 host computer 6 host computer 7 network management device 8 management information file 9 processing unit 10 determination unit 11 management information file 12 processing unit 13 determination unit 14 definition information file 15 processing unit 16 management information database 17 Output device

Claims (2)

(57) [Claims] 1. A network for a data communication network comprising: a managed device having a management information file for recording various statistical values of a failure status and a communication status; and a network management device for monitoring a communication status of the managed device. In the management method, a transmission record column and an interval value for recording a management information value of a management information file previously transmitted to a network management device are provided for each item of the management information file, and the managed device is the reference to the transmitted record field in transmitting control information value of the management information file, and transmits only the network management device management information value of the generated item of change than the amount set in the interval value A network management method, comprising: 2. A network of a data communication network comprising: a managed device having a management information file for recording various statistical values of a failure status and a communication status; and a network management device for monitoring a communication status of the managed device. In the management method, for each item of the management information file, a transmission time column and a transmission time interval for recording a time when a management information value was last transmitted to the network management device are provided, and the managed device is provided to the network management device. referring to the transmission time column in transmitting control information value of the management information file, last time transmission and the time from the network only management information value of the item that has passed the time over which is set in the transmission time interval A network management method comprising transmitting to a management device.