JPS6081944A - Diagnosing device for network - Google Patents

Abstract

PURPOSE:To facilitate troubleshooting and investigate the cause in a short time by monitoring data on a transmission line effectively and diagnosing respective data stations concentrically. CONSTITUTION:One monitoring devices VS including a diagnosing device and numbers of data stations DS are provided to the data transmission line 10 to constitute an annular network. A host device 20 is connected to the terminal interface 18 of the device VS. Further, a microprocessor 14, circuit control circuit 16, and buffer memory 17 are connected to the device 20 through an internal bus 15. Furthermore, a transmitter receiver 12 is connected to the circuit 16 through a communication control circuit 13 and the transmission line 10 is connected to the transmitter receiver 12. A host device 11 is connected to each station DS to monitor data on the transmission line 10 effectively and the respective stations DS are diagnosed concentrically to facilitate the troubleshooting, investigating the cause in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diagnostic device for facilitating network failure diagnosis.

As is well known, a distributed processing system has a network configuration in which a large number of computers and various control devices are connected to a shared data transmission path, and data is exchanged between them. is taking. When a problem occurs in such a sophisticated system, especially when a problem occurs with data transmission, it is extremely difficult to analyze and isolate the problem.

Based on very little information such as normal phenomena and error logs, is the cause of the problem located in the network that constitutes the network? It is normal to isolate the source of the problem, such as the computer connected to it, which data station it is, or whether it is hardware or software.

However, troubleshooting using such a method is very time consuming, and only an experienced engineer who is familiar with the system configuration and characteristics can properly investigate the cause.

This invention was made by overcoming the conventional problems mentioned above, and its purpose is to monitor data on the transmission path in order to easily analyze network troubles. Another object of the present invention is to provide a network diagnostic device capable of effectively and centrally monitoring each data station.

In order to achieve the above object, the present invention provides a monitoring station that is connected to a network transmission line and performs synchronous control and status monitoring of the network, while sequentially taking in data from a transmission line and sequentially updating a predetermined amount of data. a means for storing, a means for collecting accumulated data such as error information of each data station, a means for collecting state transition trace data indicating the operation of each data station, and a means for collecting accumulated data such as error information of each data station; The invention is characterized in that it is provided with means for displaying.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows an entire system having a ring network configuration to which the present invention is applied, and FIG. 2 shows the configuration of a monitoring station Sv in the same system.

This network consists of a data transmission path 1 that takes the form of a ring.
0 (2. One monitoring station Sv (including the diagnostic device according to the present invention) and a number of data stations DS are coupled. Each data station DS has a host device 1 such as a computer, a sequence controller, a terminal device, etc.
1 are connected to each other -C. Also, connected to the monitoring station Sv is a terminal device 20 of the size of a so-called personal computer tg-. The monitoring station Sv is in charge of overall synchronization control of data transmission, and also monitors the state of the data transmission path 10.

In other words, data is exchanged with each host device connected to the network under synchronous control and monitoring control by the monitoring station Sv. This completes the construction of a distributed processing system.

As shown in FIG. 2, the monitoring station Sv includes a transmitter/receiver 12 connected to the data transmission path 10, a communication control circuit 13 that controls data transmission according to a predetermined communication protocol, and a communication control circuit 13 that controls the operation of the monitoring station SV. a microprocessor 14 that controls data transfer between the internal path 15 and the communication control circuit 13, a buffer memory 17, and a terminal device (personal computer) 20.
A terminal interface 18 is provided which connects the internal bus 15 to the terminal interface 18 .

This configuration is almost the same as data station DS.

In addition to data transmission synchronization and monitoring control, the monitoring station SV
The diagnostic device performs the following control and processing. The functions of the diagnostic device are broadly classified into monitoring data on the transmission line 10 (this is called line diagnosis) and collecting data from each data station DS (this is called remote diagnosis).

In order to perform the above-mentioned line diagnosis, after inputting the trace data, the trigger condition rj of trace 1+h, etc. using the terminal device 20, a start command is given. Then the monitoring station S
v receives the data on the transmission path 10 internally via the transmitter/receiver 12, communication control circuit 13, and transfer control circuit 16 under the control of the microprocessor 14, and checks whether there is an error or not with respect to the specified data length or time. Tracing is started and the data is sequentially stored in the buffer memory 17.

This tracing process is performed every time data is input from the transmission line 10, and when the buffer memory 17 is full, the data is cyclically updated.
The latest data of capacity is stored in this. When the trigger condition is satisfied (in addition to data pattern matching, there is an external trigger, a manual trigger, etc.), the tracing process β1 is ended and the terminal device 20 is notified of this fact. In response to this, the terminal device 20 takes in the data stored in the buffer memory 17 and displays it on the CRT 7r. Then, based on this display, the trace data is analyzed and the cause of the trouble is isolated in step 1r.

In this way, it is possible to investigate the cause of the trouble (2) to trace monitor the data on the transmission line 10-1 by specifying only valid data.
can be used effectively to perform effective line diagnosis.

To perform the above remote diagnosis, specify the data station DS to be diagnosed on the terminal device 2o, and
Specify the data to be collected. Each data station D
When collecting accumulated data stored in S, a command is transmitted from the monitoring station N to the designated data station I)S by inputting that information on the terminal device 20, and in response to this, data station DS Accumulated data including error information etc. is transmitted to the monitoring station Sv, and the accumulated data is displayed on the terminal device 420 to be used to investigate the cause of the trouble.

In addition, when collecting state transition trace data indicating the operation history of a data station DS, when inputting this on the terminal device d20, a command is transmitted from the monitoring station sv to the specified data station DS. trace is started. This trace is stopped by a command from the monitoring station Sv or by the establishment of a trace stop condition. When one trace stops, the obtained trace data is transmitted from the data station DS to the monitoring station SV, and further transmitted to the terminal device 20 and displayed, so as to be used to investigate the cause of the trouble.

In this way, the diagnosis of each data station DS is also performed by the monitoring station V.
The troubleshooting time can be shortened and the ease of maintenance greatly improved.

Although a ring-type network has been described as an example, the present invention is not limited to this and can be applied to other types of networks.

As explained in detail above, according to the network diagnostic equipment according to the present invention, data on the transmission path can be checked very effectively, and each data station can be diagnosed in a concentrated manner.・Shooting becomes easier, and even if you are not a very experienced engineer, you will be able to investigate the cause in a relatively short time.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a ring network system to which the present invention is applied, and FIG. 2 is a block diagram showing the configuration of a monitoring station in FIG. 1.

Claims (1)

[Claims] (1) Shared data transmission path C: In a network where a large number of computers etc. are connected via data stations, the two transmission paths C are connected to a monitoring station that performs network synchronization control and status monitoring. means for storing the data 111 times and updating it at a predetermined frequency, means for collecting accumulated data such as error information of each data station, and collecting state transition trace data indicating the operation history of each data station. 1. A network diagnostic device characterized by comprising means and these stages.