JPH06132960A - Lan fault monitoring device/ system and logging data collection system therefor - Google Patents

Abstract

PURPOSE:To provide the LAN fault monitoring device/system and a logging data collection system therefor in order to perform the logging in an operation of a normal LAN system, to automatically stop the logging along with the occurrence of a fault, and to surely collect the log data right before the occurrence of the fault. CONSTITUTION:All packets on a LAN received by a 1st LAN transmission/ reception controller 21 to be set on a network monitoring mode are cyclically stored in a ring buffer on a logging memory 23 via a bus 25. When a fault is detected by the fault detecting function of a LAN fault monitoring device 20 itself, or a fault occurrence informing packet sent from a node on the LAN having the fault detecting function is received, the device 20 immediately stops the network monitoring mode and can surely collect the logging data obtained right before a fault occurs in a normal LAN operation. In such a constitution, a LAN fault monitoring system is attained along with a logging data collection system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a LAN (Local Area N
related to a LAN fault monitoring device and a LAN fault monitoring system used for the operation / management of etwork), and in particular, a LAN fault monitoring device and a LAN fault monitoring system capable of collecting logging data up to the occurrence of a fault during normal operation. And a logging data collection method therefor.

[0002]

2. Description of the Related Art First, a conventional LAN fault monitoring apparatus will be described with reference to FIG. FIG. 5 is a configuration block diagram of a LAN system using a conventional LAN failure monitoring device. The conventional LAN fault monitoring device uses a commercially available LAN analyzer, and LA for fault monitoring of LAN is used.
As shown in FIG. 5, the N system is connected to one coaxial cable 1, a plurality of nodes 2 connected to the coaxial cable 1 and transmitting and receiving data to and from each other, and connected to the coaxial cable 1. The LAN analyzer 3 monitors the packets (telegrams) that flow.

Next, the configuration of each part will be specifically described. The node 2 is connected to a data transmission line (here, a LAN coaxial cable) in the data network, and at the start of transmission / reception, the transmission partner is determined. Then, the connection process is performed, and when the software connection is completed, the data is transmitted and received, and after the transmission and reception is completed, the software disconnection process is performed to perform the data communication with each other.

The LAN analyzer 3, which is a conventional LAN fault monitoring device, has an L level as needed when a fault occurs.
Failure by connecting to the coaxial cable 1 of the AN and monitoring all packets flowing on the coaxial cable 1, or by selecting and monitoring a specific format or a specific node packet from all the packets This is a device dedicated to LAN operation management, which is used for investigating the cause of occurrence of the above, and for monitoring the transmission efficiency of the LAN.

Next, a logging data collecting method in the conventional LAN failure monitoring apparatus will be described. Here, normally, logging means storing information such as a program execution process and data communication exchanges in an auxiliary storage device one after another, and is also called tracking storage. System development process,
This function is often used to investigate the cause of failure during operation.

In the conventional logging data collection system, LA
If a failure occurs somewhere on N, after the failure, L
An AN analyzer is connected to monitor all packets or specific packets on the coaxial cable, and perform a failure reproduction test while collecting logging data. Then, when a failure occurs, the operator is supposed to stop logging.

[0007]

However, in the above-mentioned conventional LAN failure monitoring apparatus and the logging data collection method in the same, the LAN failure monitoring apparatus does not operate after the system failure occurs.
Since the analyzer is set and the reproduction test is performed, it takes time to reproduce the failure, and further, the failure cannot be reproduced unless the failure occurs in the reproduction test.

Further, since the operator stops the logging during the reproduction test, it is difficult to stop the logging, and there is a possibility that a portion of data exchange that causes a failure may be missed.

The present invention has been made in view of the above circumstances, and logging is performed during normal LAN system operation.
Logging can be stopped automatically when a failure occurs, and logging data immediately before the failure can be reliably collected.
An object is to provide an AN failure monitoring device, a LAN failure monitoring system, and a logging data collection method in the same.

[0010]

According to a first aspect of the present invention for solving the above-mentioned problems of the prior art, a LAN fault monitoring apparatus is provided with a first LAN transmission / reception control apparatus set to a network monitor mode, The second that is set to the normal LAN transmission / reception mode and monitors the reception of the fault occurrence notification message
LAN transmission / reception control device, a logging memory for accumulating and storing telegrams on the LAN, and the first LA when the second LAN transmission / reception control device receives the fault occurrence notice telegram.
It is characterized in that it has a CPU for stopping the network monitor mode of the N transmission / reception control device and reading the electronic message accumulated from the logging memory as logging data.

According to a second aspect of the present invention for solving the problems of the conventional example, a LAN fault monitoring system is provided.
The LAN fault monitoring device according to claim 1, a main control unit that controls the entire LAN, and a node that has a fault detection function and transmits a fault occurrence notification message to the LAN fault monitoring device when a fault occurs in a network. It is characterized by being connected.

According to a third aspect of the present invention for solving the above-mentioned problems of the conventional example, in the logging data collecting method in the LAN fault monitoring system according to the second aspect, the first aspect of the LAN fault monitoring apparatus according to the first aspect is provided. The LAN transmission / reception control device of No. 1 is set to the network monitor mode, all the electronic messages on the network are sequentially stored in the logging memory, and the fault occurrence notification message transmitted by the node is the L message according to claim 1.
When the second LAN transmission / reception control device in the AN failure monitoring device receives the data, the network monitor mode of the first LAN transmission / reception control device is stopped and logging data is collected from the logging memory.

According to a fourth aspect of the present invention for solving the above-mentioned problems of the conventional example, in the logging data collecting method in the LAN fault monitoring system according to the second aspect, the first aspect of the LAN fault monitoring apparatus according to the first aspect is provided. The LAN fault monitoring device according to claim 1 confirms the operation of the main control unit connected to the network by setting the LAN transmission / reception control device No. 1 in the network monitor mode and sequentially storing all the telegrams on the network in the logging memory. Is performed, it is determined that the operation is abnormal, the network monitor mode of the first LAN transmission / reception control device is stopped, and logging data is collected from the logging memory.

[0014]

According to the invention described in claim 1, the telegram on the LAN received by the first LAN transmission / reception control device set in the network monitor mode is stored in the logging memory, and the normal LAN transmission / reception mode is set. The second LAN transmission / reception control device monitors the occurrence of a failure, and when the second LAN transmission / reception control device receives the failure occurrence notification message, the CPU causes the first
Since it is a LAN fault monitoring device that stops the network monitor mode of the LAN transmission / reception control device and reads the electronic messages accumulated from the logging memory as logging data, the logging data just before the fault occurrence is surely collected during normal LAN operation. can do.

According to the second aspect of the present invention, a LAN fault monitoring device according to the first aspect, a main control section for controlling the entire LAN, and a fault occurrence notification message are sent to the LAN fault monitoring device when a fault occurs in the network. Since the LAN fault monitoring system is connected to the transmitting node, the fault occurrence notification message transmitted from the node is received by the second LAN transmission / reception control device in the LAN fault monitoring device according to claim 1, and Since the network monitor mode of the LAN transmission / reception control device can be stopped and the telegram accumulated from the logging memory can be collected as logging data, the logging data immediately before the occurrence of a failure can be reliably collected during normal LAN operation.

According to the third aspect of the invention, the first LAN transmission / reception control device set in the network monitor mode causes all the telegrams on the network to be sequentially stored in the logging memory, and the fault transmitted from the node on the LAN. The occurrence notification message is sent to the second L in the LAN fault monitoring device according to claim 1.
As soon as the AN transmission / reception control device receives the first LAN
3. The logging data is collected from the logging memory by stopping the network monitor mode of the transmission / reception control device.
Since the logging data collection method is used in the LAN failure monitoring system described above, it is possible to reliably collect the logging data immediately before the occurrence of a failure during normal LAN operation.

According to the fourth aspect of the invention, the first LAN transmission / reception control device set in the network monitor mode causes all the telegrams on the network to be sequentially stored in the logging memory, and the main control unit connected to the network is to be stored. Then, the LAN fault monitoring apparatus according to claim 1 confirms the operation, determines that the operation is abnormal, and immediately determines that the first L
The logging data collecting method in the LAN fault monitoring system according to claim 2, wherein the network monitor mode of the AN transmission / reception control device is stopped to collect the logging data from the logging memory. Data can be reliably collected, and logging data can be acquired even when a fault has occurred in all other nodes and the fault fault message notification cannot be received by the LAN fault monitoring device according to the first aspect.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram showing a configuration of a mobile radio communication system as an example of a LAN system using a LAN fault monitoring device according to an embodiment of the present invention.
It should be noted that parts having the same configuration as in FIG.

The mobile radio communication system adopts an omninet LAN as a LAN system, and uses a coaxial cable 1
An omninet LAN main controller 10 connected to the host, a host connection adapter 11 for connecting to a host system,
Lower connection adapter 12 for connecting to lower system
And a node 2 that receives a telegram sent from a mobile radio transmitter 13 and takes it into the LAN, and a LAN fault monitoring device (console adapter) 20 that maintains LAN fault information.

Next, the configuration of the LAN fault monitoring device (console adapter) of this embodiment will be described with reference to FIG. FIG. 2 is a schematic diagram of the hardware configuration of the LAN fault monitoring apparatus of this embodiment. The LAN fault monitoring apparatus according to the present embodiment has the first L set in the network monitor mode.
An AN transmission / reception control device (μPD72105) 21 and a second LAN transmission / reception control device (μPD72105) that performs normal LAN transmission / reception.
PD72105) 22, a logging memory 23 of RAM for sequentially storing and storing each telegram on the LAN, and the two L
A CPU 24 that controls the operations of the AN transmission / reception control devices 21 and 22 and reads logging data from the logging memory 23 in the event of a failure, and a bus 25 that connects each element.

Next, before explaining the operation of each section,
The LAN transmission / reception control device (μPD72105) will be described. The LAN transmission / reception control device (μPD72105) is directly connected to the LAN and operates under the control of the CPU 24 in either the network monitor mode or the normal transmission / reception mode. The μPD72105 is composed of a one-chip LSI.

The network monitor mode of the μPD 72105 will be described in detail with reference to FIG. Figure 3 shows μ
It is a schematic diagram showing a RAM space of PD72105 and a state of a ring buffer. When the network monitor mode start command is issued from the CPU 24 to the μPD 72105, all message packets on the LAN will be recorded in the logging memory 2
The data is transferred by DMA (Dynamic Memory Access) to a designated ring buffer arranged in the RAM space on the third layer. Incidentally, D
The MA controller is equipped inside the μPD72105.

When the network monitor is started, LA
The telegram packets on N are sequentially accumulated one packet at a time from the head buffer of the ring buffer, and when accumulated to the last buffer, the next packet is accumulated again in the form of being overwritten from the first buffer. As a result, if the network monitor is not stopped immediately when a failure occurs, the logging information stored in the ring buffer immediately before the failure will be overwritten and lost.

Next, a logging data collecting method in the LAN fault monitoring apparatus of this embodiment will be described. In the logging data collection method of this embodiment, the CPU 24 sets the first LAN transmission / reception control device (μPD72105) 21 to the network monitor mode, stores all packets on the network in the ring buffer on the logging memory 23, and LAN transmission / reception control device 22 of a normal LAN
The transmission / reception mode is set and the packet processing flowing through the network is executed as one node on the LAN.

Each node 2 on the LAN is provided with a failure detection function, and when a failure occurs, a packet for reporting the failure occurrence is transmitted to the second LAN transmission / reception control device 22. The CPU 24 monitors whether or not the second LAN transmission / reception control device 22 has received a packet reporting a failure occurrence, and immediately upon receiving the packet reporting a failure occurrence, the CPU 24 immediately transfers the packet to the first LAN transmission / reception control device 21. In response, a command to stop the network monitor mode is issued.

The LAN fault monitoring device 20 itself is also provided with a fault detection function, and the LAN fault monitoring device 20
Confirms the operation of the main control unit 10 on the LAN, and if an abnormality is found in the operation confirmation, it judges that a LAN failure has occurred and receives the first LAN transmission / reception control The network monitor mode of the device 21 can be stopped. For this reason,
Even if a failure occurs in all the other nodes and a packet reporting the failure occurrence is not transmitted, the network failure detection function of the LAN failure monitoring apparatus 20 itself stops the network monitor mode of the first LAN transmission / reception control apparatus 21. Is able to.

Next, the operation of the LAN fault monitoring apparatus of this embodiment will be described with reference to FIG. FIG. 4 is a flow chart showing the operation of the LAN fault monitoring apparatus of this embodiment. When the processing starts, first, the first LAN transmission / reception control device (μPD72105) 21 is set to the network monitor mode (100), and then the second LA
The N transmission / reception control device 22 is set to the normal LAN transmission / reception mode (101). Then, the LAN fault monitoring device 20 confirms the operation of the main control unit 10 of the network, determines whether the operation confirmation is OK (102), and if OK, a packet for reporting the fault occurrence (fault occurrence notification message ) Is received (103), and if not received, the process returns to step 102. If the operation confirmation of the main control unit 10 of the network is not OK or if the fault occurrence notification message is received, the network monitor mode of the first LAN transmission / reception control device (μPD72105) 21 is stopped by a command from the CPU 24 (110 ), Logging memory 23
Then, the CPU 24 reads the error logging data (111) and terminates the processing. Then, the cause of the failure occurrence is investigated based on the error logging data read in this way.

According to the logging data collecting method in the LAN fault monitoring device of this embodiment, the LAN fault monitoring device 2
The telegram packet on the LAN is stored in the logging memory 23 in 0, and when the failure occurs, the network monitor mode of the first LAN transmission / reception control device 21 is stopped to stop the storage in the logging memory 23. Since the error logging data is read from 23, the error logging data can be acquired immediately at the time of failure, so the logging data at the time of failure can be reliably and easily acquired, and there is no need to perform a reproduction test. The effect is to be able to quickly investigate the cause of failure.

Further, according to the LAN fault monitoring apparatus of this embodiment, it is not necessary to prepare a special LAN analyzer for investigating the cause of the fault, so that there is an economical effect.

Further, according to the LAN fault monitoring system of the present embodiment, not only when the second LAN transmission / reception control device 22 of the LAN fault monitoring device 20 receives the fault occurrence notification message, but also the operation of the main control section 10 is performed. It is confirmed that if there is an abnormality, the CPU 24 stops the network monitor mode of the first LAN transmission / reception control device 21 and acquires the error logging data. Even if the LAN transmission / reception control device 22 of No. 2 does not receive the fault occurrence notification message, the logging data can be acquired, and the cause of the fault occurrence can be investigated promptly.

[0031]

According to the first aspect of the present invention, the telegram on the LAN received by the first LAN transmission / reception control device set in the network monitor mode is stored in the logging memory, and the normal LAN transmission / reception mode is set. Second LA to be
The N transmission / reception control device monitors the occurrence of a failure, and when the second LAN transmission / reception control device receives the failure occurrence notification message, the CPU
Is a LAN failure monitoring device that stops the network monitor mode of the first LAN transmission / reception control device and reads out the electronic messages accumulated from the logging memory as logging data. There is an effect that it can be reliably collected.

According to the second aspect of the present invention, a LAN fault monitoring device according to the first aspect, a main control unit for controlling the entire LAN, and a fault occurrence notification message are sent to the LAN fault monitoring device when a fault occurs in the network. Since the LAN fault monitoring system is connected to the transmitting node, the fault occurrence notification message transmitted from the node is received by the second LAN transmission / reception control device in the LAN fault monitoring device according to claim 1, and Since the network monitor mode of the LAN transmission / reception control device can be stopped and the telegram accumulated from the logging memory can be collected as logging data, it is possible to reliably collect the logging data immediately before the occurrence of a failure in normal LAN operation. is there.

According to the third aspect of the present invention, the first LAN transmission / reception control device set in the network monitor mode causes all the telegrams on the network to be sequentially stored in the logging memory, and the fault transmitted from the node on the LAN. The occurrence notification message is sent to the second L in the LAN fault monitoring device according to claim 1.
As soon as the AN transmission / reception control device receives the first LAN
3. The logging data is collected from the logging memory by stopping the network monitor mode of the transmission / reception control device.
Since the logging data collection method in the LAN failure monitoring system described above is adopted, there is an effect that logging data immediately before the occurrence of a failure can be reliably collected during normal LAN operation.

According to the fourth aspect of the invention, the first LAN transmission / reception control device set in the network monitor mode causes all the telegrams on the network to be sequentially stored in the logging memory, so that the main control unit connected to the network is controlled. Then, the LAN fault monitoring apparatus according to claim 1 confirms the operation, determines that the operation is abnormal, and immediately determines that the first L
The logging data collection method in the LAN fault monitoring system according to claim 2, wherein the network monitoring mode of the AN transmission / reception control device is stopped and the logging data is collected from the logging memory. There is an effect that the data can be reliably collected, and the logging data can be acquired even when the fault occurrence telegram notification cannot be received by the LAN fault monitoring apparatus according to the first aspect due to the fault occurrence in all the other nodes.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing a configuration of a mobile radio communication system as an example of a LAN system using a LAN fault monitoring device according to an embodiment of the present invention.

FIG. 2 is a schematic hardware configuration diagram of a LAN fault monitoring device according to the present embodiment.

FIG. 3 is a schematic diagram showing a RAM space of a μPD72105 and a state of a ring buffer.

FIG. 4 is a flowchart showing the operation of the LAN fault monitoring apparatus according to this embodiment.

FIG. 5 is a configuration block diagram of a LAN system using a conventional LAN fault monitoring device.

[Explanation of symbols]

1 ... Coaxial cable, 2 ... Node, 3 ... LAN analyzer, 10 ... Main control unit, 11 ... Host connection adapter,
12 ... Lower level connection adapter, 13 ... Transmitter, 20 ... L
AN failure monitoring device (console adapter), 21 ... First LAN transmission / reception control device (μPD72105), 2
2 ... Second LAN transmission / reception control device (μPD7210
5), 23 ... logging memory, 24 ... CPU, 2
5 ... bus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) One inventor Saito, 2-13-13 Toranomon, Minato-ku, Tokyo International Electric Co., Ltd. (72) Inventor Tsuyoshi Ono 2-3-13 Toranomon, Minato-ku, Tokyo International Electric Co., Ltd.

Claims (4)

[Claims] 1. A first LAN transmission / reception control device set in a network monitor mode, a second LAN transmission / reception control device set in a normal LAN transmission / reception mode for monitoring reception of a fault occurrence notification message, and a LAN transmission / reception control device. Logging memory for accumulating and storing the message of the above, and the first L when the failure occurrence notification message is received by the second LAN transmission / reception control device.
A LAN fault monitoring device, comprising: a CPU for stopping a network monitor mode of the AN transmission / reception control device and reading a telegram accumulated from the logging memory as logging data. 2. A LAN fault monitoring device according to claim 1,
A LAN fault characterized in that a main control unit that controls the entire LAN and a node that has a fault detection function and that transmits a fault occurrence notification message to the LAN fault monitoring device when a fault occurs are connected to a network. Monitoring system. 3. The fault occurrence in which a node transmits a first LAN transmission / reception control device in the LAN fault monitoring device according to claim 1 is set to a network monitor mode and all telegrams on the network are sequentially stored in a logging memory, and a node transmits. The notification message is sent to the second LA in the LAN fault monitoring device according to claim 1.
3. When the N transmission / reception control device receives the data, the first LAN transmission / reception control device stops the network monitor mode and collects the logging data from the logging memory. method. 4. The main control for connecting the network to the network by setting the first LAN transmission / reception control device in the LAN fault monitoring device according to claim 1 in a network monitor mode and sequentially storing all telegrams on the network in a logging memory. The LAN fault monitoring device according to claim 1 confirms the operation of the unit, judges that the fault is an abnormal operation, stops the network monitor mode of the first LAN transmission / reception control device, and then from the logging memory. The logging data collecting method in the LAN fault monitoring system according to claim 2, wherein the logging data is collected.