JP2536449B2 - Trace data collection method for fault location investigation in packet communication network - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to packet communication networks, and more particularly to network maintenance.

[0002]

2. Description of the Related Art In a conventional packet communication network, an FC is used to confirm whether or not a frame content is transmitted without error during transmission / reception in a network including a relay station.
Error detection is performed by adding S (frame check sequence).

Since the FCS targets are addresses, control information, information (data), and FCS itself, addresses and information (data) are added before FCS addition processing during transmission and transfer.
Is processed erroneously, data with incorrect contents is transmitted to the receiving end station.

When the receiving terminal station detects erroneous data, it is not possible to specify the location of the failure (the station where the failure occurs) only by checking the FCS.

Further, even if each communication station has a trace function for holding transmitted / received data, it is necessary to start / stop each station, so it takes time to start / stop trace (data holding), When the upper limit of the trace data storage amount is reached, the information is updated and the necessary data is lost.

[0006]

Conventionally, in this type of packet communication network, if an address or information (data) is erroneously processed before the FCS addition process, data having erroneous contents is transmitted to the receiving terminal station. It will be sent.

Further, even if each communication station has a trace function for holding transmission / reception data, it is necessary to individually start and stop the trace function for investigating the location of occurrence. It takes time to reach the upper limit of the trace / data accumulation amount, and the information is updated, and necessary data is lost.

Therefore, in the packet communication network, when a packet having an error in the data content is detected at the receiving end station, which of the transmitting station and the relay station up to the receiving end station is the fault occurrence point (occurrence station). Or, there is a problem that data for analysis cannot be collected efficiently.

It is an object of the present invention to provide a trace data collection method capable of efficiently acquiring data for identifying a location where a data error failure occurs in transmission and transfer processing in a packet communication network. .

[0010]

SUMMARY OF THE INVENTION The present invention provides a trace / trace for investigating a fault location in a packet communication network.
In the data collection method, a packet trace means for collecting / accumulating transmitted / received packet information by a transmitting / receiving station and a relay station in a packet communication network, and a packet trace from a packet receiving station to all packet communication stations including a relay station. And a means for transmitting a start notification and a stop notification packet to another communication station while starting and stopping a packet trace by receiving a packet trace start notification and a stop notification packet It is equipped with and activates the packet trace of all stations in the network by the activation operation from one station,
When an error is detected in the packet information at the receiving end station, the packet tracing of all stations in the network is stopped by the operation of stopping the receiving end station.

[0011]

In the packet communication network including the relay station, all the packet communication stations including the relay station are provided with a function capable of remotely starting and stopping the packet trace from the packet receiving station, and the packet receiving station If an error in the information part of the packet is detected, stop the packet trace for the entire network.

As a result, at each station in the network,
Trace data can be collected to identify the faulty station.

By comparing the trace data collected by each station, the location of failure can be analyzed.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows functional blocks of a packet transmission device 10 in one station. This packet transmission device
A receiving unit 5 that receives a packet and performs an FCS check,
A transmitter 6 for transmitting a packet with FCS added, a packet trace function for collecting and accumulating transmitted / received packet information, and a packet trace activation notification from a packet receiving station to all packet communication stations including a relay station. And a function of transmitting a stop notification packet, and a function of starting and stopping a packet trace by receiving a packet trace start notification and a stop notification packet and transmitting a start notification and a stop notification packet to another communication station. A processing unit 2 and a database 3 for accumulating trace data,
It is provided with a packet notifying unit 4 for selecting a trace notification packet and a normal information packet.

In such a packet transmission device 10, the packet trace is activated from the terminal 1, and the activation instruction command is output to the processing unit 2 by the input of the terminal.

By inputting this start command, the processing section 2
The trace unit 2 before and after performing processing such as assembling / disassembling / transferring packets in the processing unit (at the time of packet reception and transmission)
The contents of the packet are copied at a and 2b and stored in the database 3 as trace data.

In this way, the packet tracing of the own station is started, and at the same time, the processing section 2 assembles a notification packet for activating the trace with respect to another communication station, and the transmitting section 6 transmits this.

In the opposite station which receives the start notification packet in the receiving unit 5, the packet identifying unit 4 identifies and distinguishes from the normal information packet, and when it is the trace start notification packet, the start instruction command is sent to the processing unit 2. Is output.

In response to this start-up command, the processing section 2 starts the packet trace of its own station as described above, and also assembles and sends a trace start-up notification packet to other communication stations.

By repeating the above operation, 1
The packet trace activation of one station activates the packet trace of the entire network.

To stop the packet trace,
A stop command is output from the terminal 1 to the processing unit 2. The processing unit 2 stops the packet trace and assembles and sends a notification packet for stopping the trace. The station receiving the trace stop notification packet stops the packet trace, assembles and transmits the stop packet,
Stop the trace of each station.

FIG. 2 shows the flow of packet trace start / stop notification. In the packet communication network including the stations a to f, the case where the trace is started and stopped remotely from the station a will be described. When the trace is started at the terminal of station a, the trace is started at station a and c
Send a notification packet for trace activation to the station.

Upon receipt of this notification packet, station c sends a trace start notification packet to stations b and d together with the start of tracing.

As a result, the packet trace is also started in the b station and the d station, the e station and the f station are notified, and the packet trace of the entire network is activated.

By the start notification of the packet trace, each communication station in the network collects the information content of each transmitted / received packet and stores the trace data in the database 3 of the packet transmission device of each communication station. To do.

When the accumulated data amount of the trace packet information of the database 3 reaches the upper limit during the packet trace, the oldest data is discarded to continue the recording.

In the packet trace stop, a stop command is output from the terminal 1 of a station a in the network to the processing unit 2 as in the case of starting.

The processing unit 2 stops the packet trace and assembles a notification packet for stopping the trace to the c station.

Station c, which has received the trace stop notification packet, stops the packet trace, assembles the stop packet and sends it to stations b and d to stop the traces of stations b and d.

Further, the stop packet is notified to the e station and the f station, and the packet trace of the entire network is stopped.

When a fault investigation is performed, packet tracing is activated in the packet transmission device of each station in the packet communication network, and when an abnormality in the data content is detected at the receiving end station in the network, the packet is immediately transmitted to the detecting station. -Send the trace stop notification packet to stop the packet trace of each station.

By this, at each station in the network,
Trace data can be collected to identify the faulty station.

By comparing the trace data collected at each station, the location of the failure can be analyzed.

[0034]

As described above, according to the present invention, the data for analyzing the failure occurrence point (the occurrence station) can be efficiently collected by starting and stopping the trace for all the stations of the network by the operation of one station. .

[Brief description of drawings]

FIG. 1 is a functional block diagram of a packet transmission device.

FIG. 2 is a diagram showing a flow of starting / stopping a packet trace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 terminal 2 processing units 2a, 2b tracing unit 3 database 4 packet identifying unit 5 receiving unit 6 transmitting unit 10 packet transmission device

Claims (3)

(57) [Claims] 1. A trace data collection method for investigating a fault location in a packet communication network, comprising: a packet trace means for collecting and accumulating packet information transmitted and received by a transceiver station and a relay station in the packet communication network; Means to send packet trace start notification and stop notification packet from all receiving stations to all packet communication stations including relay station, and start / stop packet trace by receiving packet trace start notification and stop notification packet With
A means for transmitting a start notification and stop notification packet to another communication station is provided, and the packet trace of all stations in the network is started by the start operation from one station, and the packet information is incorrect at the receiving end station. A trace data collection method characterized in that, when is detected, the packet trace of all stations in the network is stopped by the operation of stopping the receiving terminal station. 2. The trace data collecting method according to claim 1, wherein when the accumulated data amount of packet information reaches the upper limit, the oldest data is discarded to continue the accumulation. 3. The trace data collecting method according to claim 2, wherein the location of the failure is analyzed by comparing the trace data collected by each station.