JP3356809B2 - LAN fault monitoring apparatus, LAN fault monitoring system, and logging data collection method therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a LAN (Local Area N)
TECHNICAL FIELD The present invention relates to a LAN fault monitoring device and a LAN fault monitoring system used for the operation / management of a network, and more particularly to a LAN fault monitoring device and a LAN fault monitoring system capable of collecting logging data until a fault occurs 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 fault monitoring device. The conventional LAN fault monitoring apparatus uses a commercially available LAN analyzer, and is used for monitoring a LAN fault.
As shown in FIG. 5, the N system includes one coaxial cable 1, a plurality of nodes 2 connected to the coaxial cable 1 and mutually transmitting and receiving data, and a plurality of nodes 2 connected to the coaxial cable 1. It consists of a LAN analyzer 3 that monitors flowing packets (telegrams).

Next, the configuration of each unit will be described in detail. The node 2 is connected to a data transmission line (here, a LAN coaxial cable) in a data network, and determines a transmission partner when transmission / reception starts. Then, when connection processing is performed and data connection is completed, data transmission / reception is performed, and after transmission / reception is completed, data communication is performed with each other in a procedure of performing software disconnection processing.

The LAN analyzer 3, which is a conventional LAN fault monitoring device, is provided with a LAN monitor 3 as needed when a fault occurs.
Monitoring all packets connected to the coaxial cable 1 of the AN and flowing on the coaxial cable 1 or selecting and monitoring a packet of a specific format or a specific node from all the packets to monitor This is a device dedicated to LAN operation management used for investigating the cause of occurrence of LAN and monitoring LAN transmission efficiency.

Next, a description will be given of a logging data collecting method in a conventional LAN fault monitoring apparatus. Here, the term “logging” generally refers to sequentially storing information such as a program execution process and data communication exchanges in an auxiliary storage device, and is also referred to as tracking storage. System development process,
This function is often used for investigating the cause of failure during operation.

[0006] In the conventional logging data collection method, LA
If a failure occurs somewhere on N, after the failure occurs, L
An AN analyzer is connected, all or specific packets on the coaxial cable are monitored, and a failure reproduction test is performed while collecting logging data. Then, when a failure occurs, the operator performs an operation of stopping logging.

[0007]

However, in the above-described conventional LAN fault monitoring device and the logging data collecting method in the same, the LAN fault monitoring device and the logging data collection method are used after the system fault occurs.
Since the setting of the analyzer is performed and the reproduction test is performed, it takes a long time to reproduce the failure, and further, there is a problem that the reproducibility of the failure cannot be obtained unless a failure occurs in the reproduction test.

Further, since the logging is stopped by the operator during the reproduction test, the timing of stopping the logging is difficult, and there is a problem that a data exchange point causing a failure may be missed.

The present invention has been made in view of the above circumstances, and performs logging in a normal LAN system operation.
L that automatically stops logging when a failure occurs, and can reliably collect logging data immediately before the failure occurs.
An object of the present invention is to provide an AN fault monitoring device, a LAN fault monitoring system, and a logging data collection method in the system.

[0010]

According to a first aspect of the present invention, there is provided a LAN fault monitoring apparatus, comprising: a logging device for storing and storing messages on a LAN.
And Mori, and it is set to the network monitor mode, the value
All messages on the network are sequentially stored in the logging memory
First and LAN transmission and reception control unit, when Ru is set to the normal LAN transceiver mode, the main control section connected to the LAN to
Operation is checked against the network connected to the LAN.
Monitoring the reception of a failure notification message from the second L
An AN transmission / reception control device, and the first LAN transmission / reception control device
Device to network monitor mode, and
LAN transmission / reception control device to LAN transmission / reception mode
And a main control unit of the second LAN transmission / reception control device.
If the operation is abnormal when checking the operation, it is determined that a failure has occurred.
Disconnecting the network of the first LAN transmission / reception control device
Stop monitor mode and send a message from the logging memory.
Collect as logging data and check the operation of the main controller
And when the second LAN transmission / reception control device receives the failure occurrence notification message, the first
Stopping the network monitor mode of LAN transceiver controller, adopted the logging memory or Lalo swinging data
And a central processing unit ( CPU).

According to a second aspect of the present invention, there is provided a LAN fault monitoring system, comprising:
A LAN fault monitoring device according to claim 1, a main control unit for controlling the entire LAN, and a node having a fault detection function and transmitting a fault notification message to the LAN fault monitoring device when a fault occurs in the network. It is characterized by being connected.

According to a third aspect of the present invention, there is provided a LAN fault monitoring system according to the second aspect.
2. A method for collecting logging data in a system , comprising:
All message on the network is stored sequentially in the logging memory by setting the first LAN transceiver control device in the fault monitoring device in a network monitor mode, further the LAN failure
The second LAN transmission / reception control device in the monitoring device is connected to a normal LA
Set the N transmission / reception mode and check the operation of the main control unit
If the operation of the main control unit is abnormal,
And the network of the first LAN transmission / reception control device is determined.
Stop the network monitor mode and check the logging memory
From the main control unit.
Operation in the case of normal, the node receives the previous SL second LAN transceiver control device failure notification message to be transmitted, from said logging memory network monitor mode is stopped in the first LAN transceiver controller It is characterized by collecting logging data.

[0013]

[0014]

According to the first aspect of the present invention, a message on the LAN received by the first LAN transmission / reception control device set to 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 operates on the main control unit connected to the LAN.
Checks and troubles from nodes connected to LAN
The failure occurrence is monitored by monitoring the reception of the harm occurrence notification message, and the operation of the main control unit by the second LAN transmission / reception control device is performed.
Check if there is any abnormality in the operation, and if
When the operation receiving the failure notification message in the second LAN transceiver controller in the case of normal, CPU stops the network monitor mode of the first LAN transceiver controller, the stored message from the logging memory Since the LAN failure monitoring device is read as logging data, it is possible to reliably collect logging data immediately before the occurrence of a failure during normal LAN operation.

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

According to the third aspect of the present invention, all the messages on the network are sequentially stored in the logging memory by the first LAN transmission / reception control device set to the network monitor mode, and the first LAN transmission / reception control device in the LAN failure monitoring device further stores 2 LAN
Set the transmission / reception control device to the normal LAN transmission / reception mode
The operation of the main control unit is checked, and the operation of the main control unit is different.
Or the operation of the main control unit is normal and the LAN
2. A failure notification message transmitted from the upper node.
3. The LAN fault according to claim 2, wherein the second LAN transmission / reception control device in the LAN fault monitoring device described above immediately stops the network monitor mode of the first LAN transmission / reception control device and collects logging data from a logging memory. Since the logging data collection method in the monitoring system is used, it is possible to reliably collect the logging data immediately before the occurrence of a failure during normal LAN operation.

[0017]

[0018]

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 one embodiment of the present invention.
Parts having the same configuration as in FIG. 5 are described with the same reference numerals.

The mobile radio communication system employs an omni-net LAN as a LAN system and uses a coaxial cable 1.
A main control unit 10 of an omni-net LAN connected to a host system, an upper connection adapter 11 for connecting to an upper system,
Lower connection adapter 12 for connecting to lower system
And a node 2 for receiving a message transmitted from the mobile radio transmitter 13 and taking it into the LAN, and a LAN fault monitoring device (console adapter) 20 for maintaining 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 a hardware configuration of the LAN fault monitoring device of the present embodiment. The LAN fault monitoring apparatus according to the present embodiment has a first L which is set to the network monitor mode.
An AN transmission / reception control device (μPD72105) 21 and a second LAN transmission / reception control device (μ
PD72105) 22, a logging memory 23 of a RAM for sequentially storing and storing each message on the LAN, and the two Ls.
It comprises a CPU 24 that controls the operation of the AN transmission / reception control devices 21 and 22 and reads out logging data from the logging memory 23 when a failure occurs, and a bus 25 that connects each element.

Next, before describing the operation of each unit,
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 in either the network monitor mode or the normal transmission / reception mode under the control of the CPU 24. Note that the μPD 72105 is formed of a one-chip LSI.

The network monitor mode of the μPD 72105 will be described in detail with reference to FIG. FIG.
It is the schematic which shows the RAM space of PD72105, and the state of a ring buffer. When the CPU 24 issues a network monitor mode start command to the μPD 72105, all message packets on the LAN are stored in the logging memory 2.
3 is transferred to a designated ring buffer located in the RAM space on the DMA 3 by DMA (Dynamic Memory Access). Note that D
The MA controller is provided inside the μPD72105.

When the network monitor is started, LA
The message packets on N are sequentially stored one packet at a time from the first buffer of the ring buffer, and when the last packet is stored, the next packet is again stored overwritten from the first buffer. As a result, when a failure occurs, unless the network monitor is immediately stopped, the logging information stored in the ring buffer immediately before the failure occurs is overwritten and lost.

Next, a description will be given of a logging data collection method in the LAN fault monitoring apparatus according to the present embodiment. 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
The transmission / reception mode is set, and packet processing flowing through the network as one node on the LAN is executed.

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

Also, the LAN fault monitoring device 20 itself has a fault detection function.
The operation of the main control unit 10 on the LAN is confirmed from the above. If an abnormality is found in the operation confirmation, it is determined that a LAN failure has occurred in the same manner as when a packet reporting a failure has been received. 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 occurrence of the failure is not transmitted, the network monitoring mode of the first LAN transmission / reception control device 21 is stopped by the failure detection function of the LAN failure monitoring device 20 itself. You can do it.

Next, the operation of the LAN fault monitoring apparatus according to the present embodiment will be described with reference to FIG. FIG. 4 is a flowchart illustrating the operation of the LAN fault monitoring device according to the present embodiment. When the process is started, 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 a normal LAN transmission / reception mode (101). Then, the operation of the main control unit 10 of the network is confirmed from the LAN failure monitoring device 20 and it is determined whether or not the operation confirmation is OK (102). ) Is received (103), and if not, the process returns to step 102. When the operation confirmation of the main control unit 10 of the network is not OK and when a failure 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
The CPU 24 reads out the error logging data from (111), and ends the processing. Then, the cause of the failure is determined based on the error logging data thus read out.

According to the logging data collection method in the LAN fault monitoring device of this embodiment, the LAN fault monitoring device 2
In the event that a failure occurs, the network monitor mode of the first LAN transmission / reception control device 21 is stopped and the storage in the logging memory 23 is also stopped. Since the error logging data is read from 23, the error logging data can be obtained immediately at the time of the occurrence of the failure, so that the logging data at the time of the failure can be reliably and easily obtained, and there is no need to perform a reproduction test. This has the effect that the cause of the failure can be quickly investigated.

Further, according to the LAN fault monitoring apparatus of this embodiment, there is no need to prepare a special LAN analyzer to determine the cause of the fault, so that there is an economical effect.

Further, according to the LAN fault monitoring system of the present embodiment, the operation of the main controller 10 is not limited to the case where the second LAN transmission / reception control device 22 of the LAN fault monitoring device 20 receives the fault occurrence notification message. Confirmation is performed. If an error is detected, the network monitoring mode of the first LAN transmission / reception control device 21 is stopped from the CPU 24 to acquire error logging data. Even if the second LAN transmission / reception control device 22 does not receive the failure notification message, logging data can be obtained, and the cause of the failure can be quickly investigated.

[0031]

According to the first aspect of the present invention, a message on the LAN received by the first LAN transmission / reception control device set to the network monitor mode is stored in the logging memory, and the normal LAN transmission / reception mode is set. Second LA
N For the main control unit connected to the LAN by the transmission / reception control device
Check the operation and confirm that the node is connected to the LAN.
The failure occurrence is monitored by monitoring the reception of the failure occurrence notification message and the main control unit by the second LAN transmission / reception control device.
If there is an abnormality in the operation check and the operation of the main control unit
When the operation confirmation receives the failure notification message in the second LAN transceiver controller in the case of normal, CPU stops the network monitor mode of the first LAN transceiver controller, accumulated from the logging memory Since the apparatus is a LAN failure monitoring device that reads out a message as logging data, it is possible to reliably collect logging data immediately before a failure occurs during normal LAN operation.

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

According to the third aspect of the present invention, all the messages on the network are sequentially stored in the logging memory by the first LAN transmission / reception control device set to the network monitor mode, and furthermore , the first LAN transmission / reception control device in the LAN failure monitoring device is used. 2 LAN
Set the transmission / reception control device to the normal LAN transmission / reception mode
The operation of the main control unit is checked, and the operation of the main control unit is different.
Or the operation of the main control unit is normal and the LAN
2. A failure notification message transmitted from the upper node.
3. The LAN fault according to claim 2, wherein the second LAN transmission / reception control device in the LAN fault monitoring device described above immediately stops the network monitor mode of the first LAN transmission / reception control device and collects logging data from a logging memory. Since the logging data collection method in the monitoring system is used, it is possible to reliably collect the logging data immediately before the occurrence of a failure during normal LAN operation.

[0034]

[Brief description of 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 one embodiment of the present invention.

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

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

FIG. 4 is a flowchart illustrating the operation of the LAN fault monitoring device according to the present embodiment.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Coaxial cable, 2 ... Node, 3 ... LAN analyzer, 10 ... Main control part, 11 ... Host connection adapter,
12 ... lower 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

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hitoshi Saito 2-3-13 Toranomon, Minato-ku, Tokyo Inside Kokusai Denki Co., Ltd. (72) Inventor Tsuyoshi Ohno 2-3-1-13 Toranomon, Minato-ku, Tokyo Kokusai Electric (56) References JP-A-1-115244 (JP, A) JP-A-64-8744 (JP, A) JP-A-4-243338 (JP, A) JP-A-2-14651 (JP, A) A) JP-A-62-248332 (JP, A) JP-A-3-148942 (JP, A) JP-A-61-149443 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) H04L 12/28-12/46

Claims (3)

(57) [Claims] 1. Logging for storing and storing telegrams on a LAN
And memory, and it is set to the network monitor mode, network
A first method of sequentially storing all messages on the network in the logging memory
And LAN transmission and reception control unit, when Ru is set to the normal LAN transceiver mode, against the LAN
Check the operation of the connected main control unit, and
Network Monitor and second LAN transceiver controller, the first LAN transceiver controller for monitoring the reception of the failure occurrence notification message from a node connected to N
Mode, and the second LAN transmission / reception control device
Is set to the LAN transmission / reception mode, and the second LAN transmission / reception is set.
The operation of the main control unit by the communication control unit is abnormal.
Is determined to have occurred, the first LAN transmission
Before stopping the network monitor mode of the reception controller
Collect messages from logging memory as logging data
However, if the operation of the main controller is confirmed to be normal,
Te, the stopping and receives network monitor mode of the first LAN transceiver controller the failure notification message in the second LAN transceiver controller, and a CPU for collecting the logging memory or Lalo swinging data A LAN fault monitoring device, characterized in that: 2. A LAN fault monitoring device according to claim 1, a main control unit for controlling the entire LAN, and a fault detection function, wherein a fault occurrence notification message is transmitted to said LAN fault monitoring device when a fault occurs. A LAN fault monitoring system, wherein the node and the node are connected to a network. 3. The LAN fault monitoring system according to claim 2,
2. A method for collecting logging data in a system , wherein a CPU in the LAN fault monitoring device according to claim 1 sets a first LAN transmission / reception control device in the LAN fault monitoring device to a network monitor mode, so that all the devices on the network are set. The messages are sequentially stored in a logging memory, and a second LAN transmission / reception control in the LAN fault monitoring device is performed.
Set the control device to the normal LAN transmission / reception mode and
Operation is confirmed, and the operation of the main control unit is abnormal.
In this case, it is determined that a failure has occurred and the first LAN transmission / reception
Stop the network monitor mode of the
Collected the telegram as logging data from the logging memory
And, in the case the operation is normal for the main control unit, when a node receives the previous SL second LAN transceiver control device failure notification message to be transmitted, the network monitor mode of the first LAN transceiver controller it characterized by collecting the logging data from the logging memory to stop the
Logging data collection side in L AN fault monitoring system
Law .