JPH0644760B2 - Network monitoring method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network monitoring system, and more particularly to monitoring communication error information generated in a bus type packet communication network,
It concerns the collection method.

2. Description of the Related Art Conventionally, when monitoring and collecting communication error information in a bus-type packet communication network, a network monitoring device that constantly receives and monitors data transmission on the bus is connected to the packet communication network. Method for analyzing and collecting communication errors, or each communication control device connected to the packet communication network stores and holds communication error information in memory, and each communication control is performed upon request or whenever a communication error is detected. A method of outputting to an output unit such as a printing device connected to the device has been proposed.

However, in the conventional network monitoring method described above, in the former case, the network monitoring device receives and monitors all packet signals transmitted on the bus, and analyzes the communication error. However, there is a disadvantage that the network monitoring device becomes very complicated and that not all packet signals transmitted on the bus can be received at the place where the network monitoring device is connected. .

Further, the latter network monitoring method described above has a drawback in that the communication error information is distributed to each communication control device and it is difficult to centrally manage the communication error information.

The present invention has been made in view of the above-mentioned conventional circumstances,
Therefore, it is an object of the present invention to provide a new network monitoring system capable of eliminating the above-mentioned drawbacks inherent in the prior art.

In order to achieve the above object, in the network monitoring method according to the present invention, communication error information stored and retained in each communication control device connected to a bus type packet communication network is predetermined. It is provided with means for transmitting the information to the network monitoring device when the information has been accumulated a predetermined number of times.

Embodiment Next, the present invention will be described in detail with reference to the drawings for a preferred embodiment thereof.

FIG. 1 is a system configuration diagram showing an embodiment of a bus type packet switching network according to the present invention.

In FIG. 1, reference numeral 1 is a bus type data transmission path, 2 to 4 are communication control devices, 5 is a network monitoring device, and 6 is a printing device.

Further, FIG. 2 is a block diagram showing a specific configuration of the communication control device and the network monitoring device. Communication control device 2
4 and the network monitoring device 5 have the same configuration on the block diagram.

Referring to FIG. 2, 11 is a CPU, and 12 is a program memory for storing programs executed by the CPU 11. The difference between the communication control device and the network monitoring device is the program memory.
It is realized with 12 differences. Reference numeral 13 is a data memory for storing various data for the CPU 11 to execute the program, and the communication error information memory is realized by software using a partial area of the data memory 13. 14 is a buffer memory for temporarily storing data for transmitting / receiving data to / from the packet communication network, 15 is a communication control circuit for transmitting / receiving data to / from the packet communication network, 16 is a packet transmitting circuit, and 17 is a packet receiving circuit. , 19 are printing device control circuits, respectively.

In FIG. 1, the communication control devices 2 to 4 transmit and receive packet signals to each other via the bus-type data transmission path 1 and when a communication error is detected, the communication start time, own address, Stores the communication partner station address and communication error type, and sends the contents of the communication error information memory to the network monitoring device when the area allocated to the communication error information memory is full, and then the contents of the communication error information memory To the initial state. If communication control devices 2-4
If a printer is connected to the printer, it is possible to print the communication error information immediately when a transmission error is detected. However, connecting a printer to each communication control device is It is extremely inefficient in terms of operation rate and inconvenient in managing communication error information.

The network monitoring device prints the communication error information sent from each communication control device on the printing device 6 each time the communication error information is received. Depending on the error status, communication error information gathered in the network monitoring device may be sent in duplicate from the sender or receiver, or may be sent from only one of them. The occurrence statuses can be easily correlated with each other, and extremely effective information can be obtained for maintenance of the bus type packet communication network. In addition, no special hardware or special processing is required as the network monitoring device, and the network monitoring device can be realized with almost the same configuration as a normal communication control device.

As described above, according to the present invention, each communication control device connected to the bus-type packet communication network records and holds communication error information up to a certain number, and the communication error information of each communication control device is held. By sending the contents of the communication error information memory to the network monitoring device when the memory is full, it is possible to centrally manage the communication error information in the entire communication network, or to print and save it in a batch. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a bus type packet communication network according to the present invention, and FIG. 2 is a specific block configuration diagram of a communication control device and a network monitoring device. 1 ... bus type data transmission line, 2-4 ... communication control device,
5: Network monitoring device, 6 ... Printing device, 11 ...
CPU, 12 ... Program memory, 13 ... Data memory, 1
4 ... buffer memory, 15 ... communication control circuit, 16 ... packet transmission circuit, 17 ... packet reception circuit, 19 ... printer control circuit

Claims (1)

[Claims] 1. In a bus packet communication network in which data is transmitted and received in the form of packet signals, a communication control device connected to the packet communication network detects a communication error in communication through the packet communication network. Has a communication error information memory that stores and holds up to a certain number of communication error information including the address of the communication control device on the sending side, the address of the communication control device on the receiving side, the communication start time, and the communication error type related to the communication error detected in The communication error information stored in the communication error information memory is connected to the packet communication network when the communication error information stored and held exceeds a predetermined number of times, and the network monitoring device is given a predetermined address. A network monitoring method for a bus-type packet communication network characterized by transmitting the contents of memory.