JP2699904B2 - Network system - 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 system, and more particularly, to a status monitoring system between multiplexed network management devices.

[0002]

2. Description of the Related Art Conventionally, a network management apparatus manages all data communication networks in one system, and data communication apparatuses and lines constituting the data communication network are monitored by the network management apparatus.

As described above, when the entire data communication network is managed by one system, the size of the network is limited by the limitations of the processing capacity and the memory capacity of the network management device. Each system is connected and the data communication network is divided and managed by each system.

[0004]

In the above-mentioned conventional network management apparatus, the data communication apparatuses and lines constituting the data communication network are monitored by the network management apparatus. Therefore, failure monitoring of the network management device cannot be performed, and it takes time to detect the failure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a network system which can solve the above-mentioned problems, can monitor a fault of a network management device, and can shorten the time for detecting the fault.

[0006]

A network system according to the present invention comprises a data communication network comprising a plurality of data communication devices and lines, and a plurality of data management systems for managing whether data communication by the data communication network is normally performed. a network system including a network management device, a monitoring unit that monitors a state of the network management device for pair <br/> respond to the own device, other than the network management device corresponding monitoring results of the monitoring means to the own device And a notifying means for notifying another network management device of each of the plurality of data communication devices corresponding to each of the plurality of network management devices.

Another network system according to the present invention has a data communication device corresponding to its own device in addition to the above configuration.
A means for displaying a monitoring result of the monitoring means notified from the notification means of another data communication apparatus other than the network management apparatus in each of the plurality of network management apparatuses.

[0008]

The status monitoring function of each data communication device constituting the data communication network monitors the status of the corresponding network management device, and the monitoring result of these status monitoring functions is notified from the status notification function to other network management devices. .

As a result, state management between the network management devices can be performed, and a failure of the network management device can be detected at an early stage. Therefore, fault monitoring of the network management device becomes possible, and the time for detecting those faults can be reduced.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. In the figure, a network system 1 includes network management devices 2 to 4, data communication devices 5 to 7 corresponding to the network management devices 2 to 4, and a data communication network 100 configured by connecting data communication devices 5 to 7. It is composed of

Each of the network management devices 2 to 4 has a monitoring screen 21 and 3
1, 41 and response functions 22, 32, 42, and data communication with the data communication devices 5 to 7 in real time by the fault monitoring function and the failure notification function (not shown) conventionally provided in the data communication devices 5 to 7. The statuses of the lines of the network 100 and other data communication devices (not shown) are monitored (monitoring of the presence or absence of a failure), and the statuses are displayed on the monitoring screens 21, 31, and 41.

The response function 22 of the network management device 2 outputs a status response signal 101 in response to the status monitoring signal 111 from the data communication device 5. The response function 3 of the network management devices 3 and 4
2 and 42 also output a status response signal to the status monitoring signal from the data communication devices 6 and 7.

Each of the data communication devices 5 to 7 has status monitoring functions 51, 61, 71, status notification functions 52, 62, 72, and response confirmation timers 53, 63, 73. The status monitoring function 51 of the data communication device 5 transmits a status monitoring signal 111 to the network management device 2 at regular intervals, outputs a timer start / stop signal 112, and
Start 3

When a status response signal 101 is returned from the network management device 2 in response to the status monitoring signal 111, the status monitoring function 51 outputs a timer start / stop signal 112 and stops the response confirmation timer 53. The response confirmation timer 53 outputs a timeout signal 121 to the state monitoring function 51 if a stop instruction by the timer start / stop signal 112 from the state monitoring function 51 is not input within a predetermined time set in advance.

The status notifying function 52 is used when the status response signal 101 from the network management device 2 indicates an abnormality (NG) or when the timeout signal 121 from the response confirmation timer 53 is input to the status monitoring function 51. The network management device 2 is notified to the devices 2 to 4 by the status notification signals 130 to 132, respectively.
Notify abnormalities.

The status monitoring functions 61 and 71, status notification functions 62 and 72, and response confirmation timers 63 and 73 of the data communication devices 6 and 7 correspond to the status monitoring function 5 of the data communication device 5.
1. It operates in the same manner as the status notification function 52 and the response confirmation timer 53.

FIG. 2 is a sequence chart showing the operation of one embodiment of the present invention, and FIG. 3 is a diagram showing a monitoring screen 41 of the network management device 4 of FIG. The operation when an abnormality occurs in the network management device 2 will be described with reference to FIGS.

The status monitoring function 51 of the data communication device 5 transmits a status monitoring signal 111 to the network management device 2 at a constant period, outputs a timer start / stop signal 112, and starts the response confirmation timer 53.

The status notification function 52 is provided when the status response signal 101 from the network management device 2 indicates abnormal (NG) or when the status response signal 101 is not returned from the network management device 2 and the timeout signal from the response confirmation timer 53 is returned. When 121 is input to the status monitoring function 51, the network management devices 2 to 4 are notified of the abnormality of the network management device 2 by the status notification signals 130 to 132, respectively.

The monitoring screen 41 of the network management device 4 usually displays the data communication devices 5 constituting the network system 1.
9 and the network management devices 2 to 4 and the terminals 10 to 13 connected to the data communication devices 5 to 9, respectively. The status notification signal 132 from the status notification function 52 indicates that the network management device 2 has failed. When notified, the abnormality of the network management device 2 is displayed on the monitor screen 41 by changing the display color of the network management device 2 on the screen or adding a mark indicating the abnormality to the display of the network management device 2. I do.

Although the network system 1 displayed on the monitoring screen 41 shown in FIG. 3 has a ring topology, it may be a star topology or a radial topology.
Alternatively, it is possible to operate as described above even in a bus topology.

As described above, the status monitoring functions 51, 61, and 71 of the data communication devices 5 to 7 respectively monitor the statuses of the corresponding network management devices 2 to 4, and the status monitoring functions 51, 61, and 7 respectively.
1 is notified from the status notification functions 52, 62, and 72 to other network management apparatuses, so that the network management apparatuses 2 to 4
State management between the network management apparatuses 2 to 4 can be detected at an early stage. Therefore, fault monitoring of the network management devices 2 to 4 can be performed, and the time for detecting the fault can be reduced.

[0024]

As described above, according to the present invention, each data communication device monitors the state of the corresponding network management device, and notifies the other network management device of the monitoring result. Monitoring can be performed, and the time required to detect the fault can be shortened.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a sequence chart showing the operation of one embodiment of the present invention.

FIG. 3 is a diagram showing a monitoring screen of the network management device of FIG. 1;

[Explanation of symbols]

 1 Network System 2-4 Network Management Device 5-9 Data Communication Device 21, 31, 41 Monitoring Screen 22, 32, 42 Response Function 51, 61, 71 Status Monitoring Function 52, 62, 72 Status Notification Function 52, 63, 73 Response confirmation timer 100 Data communication network

Claims (3)

(57) [Claims] 1. A network system comprising: a data communication network including a plurality of data communication devices and lines; and a plurality of network management devices for managing whether data communication by the data communication network is normally performed. a monitoring means for monitoring the state of the network management device for pair <br/> respond to the own device, the <br/> other network management device other than the network management device corresponding to the own device monitoring result of said monitoring means A network system comprising: a notifying unit for notifying each of a plurality of data communication devices corresponding to each of the plurality of network management devices. Wherein said monitoring means includes a query unit for querying whether running normally to the network management device corresponding to the own device, the response signal from the network management apparatus to the inquiry from the inquiry means The network system according to claim 1 , further comprising: a detecting unit configured to detect whether or not is returned within a predetermined time. Wherein the plurality of network management equipment each means for displaying the monitoring result of said monitoring means to be notified from said notifying means <br/> other data communication devices other than the communication device corresponding to the own device The network system according to claim 1 or 2, wherein the network system comprises: