JP3460751B2 - Test method and device for LAN relay device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a LAN (Local Area Net).
work: hereinafter referred to as LAN) relates to a test method and device for verifying a packet receiving function, a route control program process, and a transmission process in a relay device.

[0002]

2. Description of the Related Art Route control of a LAN relay device is a mechanism for selecting an optimum route from a plurality of network interfaces to a target host. FIG. 15 is a diagram showing an example of the configuration of a LAN. In FIG. 15, HOST1, HOST
Reference numeral 2 is a host computer, NET1 to NET5 are networks, and 100 is a LAN relay device according to the present invention.

As shown in the figure, the LAN relay device 100
Are arranged in various places of the LAN, and the LAN relay device 10
0 is a route control program [in the figure, RIP (Routing
Information Protocol)] is provided. In the figure, when communicating between HOST1 and HOST2, the route of NET1 → NET2 → NET3 → NET5 and NET1 → NET4 → NET5
Communication can be performed through the route.

The route control program of the LAN relay device 100 determines which route should be selected for efficient communication based on its own route control information. In the case of FIG. Select the route of NET1 → NET4 → NET5. In order to enable each LAN relay device to select a route as described above, the route control program of the LAN relay device 100 normally transfers its own route control information to other adjacent networks at intervals of once every 30 seconds. Notice. Further, the routing control information (IP address) notified from the other LAN relay device 100 is stored in the routing control information table that each has, and the route is selected based on the routing control information stored in the routing control information table.

The above route control information increases as the number of networks increases, which increases the number of packets to be communicated. Also, if information from the same interface is not received for 180 seconds, the information from that interface is discarded. Conventionally, before connecting to a LAN, the above L
In order to test the AN relay device, a network is physically connected to the LAN relay device, a route control program is operated, and a transmission / reception test is performed to confirm the operation.

[0006]

However, the above-mentioned conventional test method has the following problems. (1) Routing control information amount In the conventional routing control test, the network was physically connected as described above, but the number of networks that could be installed in the test environment was limited.
For this reason, when it is operated in the field, it may be necessary to process the routing control information that exceeds 10 times the test environment, and the LAN relay device may not be able to be controlled. (2) Transmission / reception processing of route control information The route control program operates as a daemon (application that always resides in memory).

In order for the route control program to receive the route control packet, the packet passes through the driver (physical layer) → IP layer → TCP or UDP layer.
If an error occurs in these processes and unnecessary packets are discarded, the route information is not input to the route control program, so the route cannot be seen from the route control program, and communication may be impossible.

Since the conventional route control program does not have the function of transmitting the packet reception status, even if an error occurs in the above processing, it is not possible to notify that the packet has been discarded and the reception operation is confirmed. I couldn't. (3) Confirmation of Change Processing of Route Control Information Table As described above, the LAN relay device includes the route control information table, stores the route control information in the table,
A route is selected based on this route control information.

Then, when there is a change in the received route control information, the route control program changes the route control information table held by itself and periodically transmits this table. Therefore, if there is an error in changing the route control information table, the route may not be visible and communication may not be possible. Since the conventional route control program does not have means for confirming the operation of the route control information table, it is impossible to confirm whether or not the change of the route control information table is normally performed. (4) Long test time As described above, the route control program notifies other adjacent networks of its own route control information once every 30 seconds. When a large number of hosts are connected to send information, it takes a few minutes to recognize and the test time is long. (5) Constant load timing In the conventional transmission / reception test, the receiving side operated only at a fixed timing such as receiving and transmitting data.
Therefore, it is impossible to confirm the operation by changing the processing timing on the receiving side. (6) Problems on operator interface In the conventional transmission / reception test, parameters are input to both the transmitting side and the receiving side, and the test results are displayed on both sides, so the operator operates on both the receiving side and the transmitting side. It was necessary to carry out an efficient test. (7) Efficient transmission test programs (applications) and transmission processing have different task priorities, and the former has a longer running time. Therefore, if the test program (application) continues to transmit packets, the queue of the transmission process may be kept waiting or discarded, which may result in useless processing.

The present invention has been made in consideration of the above-mentioned problems of the prior art, and a first object of the present invention is to physically connect a network by transmitting pseudo route information. It is another object of the present invention to provide a LAN relay device test method and device capable of testing a route control function. A second object of the present invention is to provide a LAN relay device test method and device capable of checking the operation of the route control information table.

A third object of the present invention is to provide a physical layer, an IP layer,
A LAN relay device capable of confirming packet dropouts, packet abnormalities, etc. due to mistakes in the TCP or UDP layer, etc., and being able to perform tests at any specified transmission intervals and changing load timing. To provide a test method and device. A fourth object of the present invention is to reduce the test time, and
By allowing parameter input processing and test result display on one side (for example, on the transmission side) and monitoring the transmission processing queue with a test program (application) to avoid unnecessary processing, efficient It is an object of the present invention to provide a LAN relay device test method and device that enable various tests.

[0012]

FIG. 1 shows the principle of the present invention. In the figure, 1 is a LAN relay device on the side of the test apparatus, 1a is a man-machine interface processing section, and 1b is a packet sender for transmitting a route control information packet to the LAN relay apparatus on the side of the device under test. 2 is L on the device under test
An AN relay device, 2a is a packet checker for receiving a route control information packet and transmitting the operating state of the device under test, 2b is a table checker for checking the route control information table 2d, 2c is a route control information program, 2d
Is a route control information table. During the test by the packet checker, the packet checker 2a is set in the device under test 2 in place of the route control information program 2c.

In order to solve the above problems, as shown in FIG. 1, the invention of claim 1 of the present invention is connected via a communication path.
Test of LAN relay device equipped with routing control program
In the method, pseudo information that does not actually exist is set in a route control information packet in the LAN relay device on the test device side, and the route control information packet is sent from the LAN relay device on the test device side to the LAN relay device on the device under test side. Then, the LAN relay device on the side of the device under test investigates whether or not the information of the route control information packet is set in the route control information table.

According to a second aspect of the present invention, in the first aspect of the invention, the transmission interval of the route control information packet is changed and transmitted to the LAN relay device on the side of the device under test. According to a third aspect of the present invention, in the first or second aspect of the invention, the transmission interval of the route control information packet is dynamically changed within a certain width to provide a LAN relay device on the side of the device under test. It is designed to be sent.

According to a fourth aspect of the present invention, in the second or third aspect of the invention, the transmission of the route control information packet is stopped for a certain period of time. The invention of claim 5 of the present invention is claim 1, 2, 3 or claim 4.
In this invention, abnormal data is set in the route control information packet.

According to a sixth aspect of the present invention, a communication path is used.
LAN relay device that is connected by a network and has a route control program
In the test method of the device, the test apparatus and the LAN relay device on the side of the test device transmit the test parameter and the route control information packet to the L relay device on the side of the device under test.
In the AN relay device, the operation of the device under test is confirmed based on the test parameters and the received route control information packet, and the test result is transmitted to the test device.

According to the invention of claim 7 of the present invention, a communication path is used.
LAN relay device that is connected by a network and has a route control program
In the device test method , when a LAN control device on the test device side transmits a route control information packet to the test device side LAN relay device to test the operation of the device under test, the transmission queue is checked and the number of transmission queues is checked. When it is within a predetermined value, a route control information packet is transmitted to the LAN relay device on the side of the device under test,
When the number of transmission queues exceeds a predetermined value, it sleeps for a certain period of time.

According to the invention of claim 8 of the present invention, a communication path is used.
LAN relay device that is connected by a network and has a route control program
In this case, a LAN relay device on the test side is provided, test parameter data is created on the LAN relay device on the test device side based on operator input and transmitted to the device under test, and the operating state transmitted from the device under test. Is provided, and a man-machine interface processing unit for displaying the test result and a packet sender for transmitting the route control information packet are provided, and the LAN relay device on the device under test side is provided with
Based on the received route control information packet, check the operation status of the device under test, provide a packet checker to send the result to the test device, and receive the test result sent from the packet checker at the LAN relay device on the test device side. Thus, the operation of the device under test is confirmed.

According to the ninth aspect of the present invention, a communication path is used.
LAN relay device that is connected by a network and has a route control program
In this case, a LAN relay device on the test side is provided, test parameter data is created on the LAN relay device on the test device side based on operator input and transmitted to the device under test, and the operating state transmitted from the device under test. Is provided, and a man-machine interface processing unit for displaying the test result and a packet sender for transmitting the route control information packet are provided, and the LAN relay device on the device under test side is provided with
A table checker that investigates whether or not the information of the above-mentioned route control information packet is set in the route control information table and sends the result to the test device is provided, and the test result transmitted from the table checker is relayed by the LAN of the test device side. Upon reception by the device, the change processing operation of the route control information table of the device under test is confirmed.

According to a tenth aspect of the present invention, in the eighth or ninth aspect of the invention, pseudo information of a network and / or abnormal data which does not actually exist in the route route control information packet is set. It is configured to be transmitted to the device under test. The invention of claim 11 of the present invention is the same as the invention of claim 8, 9 or 10 ,
The packet sender is provided with a function of changing / dynamically changing the transmission interval of the route control information packet within a certain width, or stopping the transmission of the route control information packet for a certain period of time.

[0021]

In FIG. 1, the LAN relay device 1 on the test device side
The man-machine interface processing unit 1a of the above gives the packet sender 1b test parameters set from the operator console or the like, and the packet checker 2a and the table checker 2 of the LAN relay device 2 on the side of the device under test.
send to b.

The packet sender 1b generates a route control information packet format based on the test parameters and sends the route control information packet to the packet checker 2a of the LAN relay device 2 on the side of the device under test or the table checker 2b. Here, the packet sender 1b sets pseudo information of a network that does not actually exist in the route control information packet and transmits it to the device under test 2. This makes it possible to test routing without connecting a physical host.

The transmission interval of the route control information transmission is 30.
Instead of fixing the seconds, it is sent at any specified interval (for example, 1 second interval), is dynamically changed within a fixed width, or the route control information packet is transmitted for a fixed time (for example, route). The information in the control information table is deleted and the buffer area is released for 180 seconds). As a result, the test time can be shortened, and the processing of the device under test can be disturbed to perform an accelerated test of the device under test.

Further, the packet sender 1b monitors the transmission queue when transmitting the route control information packet, and transmits the route control information packet when the number of transmission queues is within a predetermined value, thereby avoiding wasteful processing and efficient. Send. The packet checker 2a receives the routing control information packet instead of the routing control information program 2c , confirms packet loss, packet abnormality, and packet normality, and sends data indicating the operating state of the device under test 2 to the test device 1. Send.

The man-machine interface processing section 1a of the test apparatus 1 receives the above data and displays the test result. On the other hand, a table checker 2 that checks the route control information table 2d during operation of the route control program 2c.
b is operated and the contents of the route control information table 2d are checked.

That is, the test parameters are given to the table checker 2b as described above, and the contents of the route control information table 2d changed by the received route control information packet are checked at regular intervals. At that time, the cost value of the route control information packet is changed to generate the change process of the route control information table 2d, the transmission interval of the route control information packet is dynamically changed to change the process timing, and By setting an abnormal value in the route control information packet and causing the route control program to log and delay the reception process, it is possible to perform tests at various load timings.

The check result by the table checker 2b is transmitted to the test apparatus 1, and the man-machine interface processing section 1a of the test apparatus 1 receives the above data and displays the test result. According to the first aspect of the present invention, as described above, the pseudo information that does not actually exist is set in the route control information packet, and the route control information packet is sent from the LAN relay device on the test device side to the device under test side. transmitted to the LAN access point, a LAN relay device under test apparatus, route
Information on the above route control information packet is stored in the control information table.
Since it is designed to investigate whether it is set or not, it is possible to carry out a test assuming the operation, and it is possible to sufficiently identify the failure. Also, the route control information of the device under test is
The information table keeps the information sent from the test equipment accurate.
You can check if you have it.

In the invention of claim 2 of the present invention, in the invention of claim 1, the transmission interval of the route control information packet is changed and transmitted to the LAN relay device of the device under test. It is possible to increase the number of times of reception processing in the device, and it is possible to cause unnecessary discarding of packets and buffer shortage due to collision of transmission processing.
Also, the test time can be shortened.

According to a third aspect of the present invention, in the first or the second aspect of the invention, the transmission interval of the route control information packet is dynamically changed within a certain width so that the device under test side Since the data is transmitted to the LAN relay device, the load on the device under test can be changed and the processing timing of the route control information program can be changed. According to the invention of claim 4 of the present invention, in the invention of claim 2 or 3, the transmission of the route control information packet is stopped for a certain period of time (for example, 180 seconds).
The buffer area can be released by deleting the information in the route control information table of the device under test. Then, the device under test performs the buffer area acquisition process by the next transmission of the route control information packet, and thus the buffer region acquisition process of the device under test is tested by stopping the transmission of the route control information packet for a certain period of time. be able to. Further, by overlapping the receiving process and the table changing process (addition), it is possible to perform the test of the device under test under various load conditions, which further disturbs the process of the device under test.

In the invention of claim 5 of the present invention, since abnormal data is set in the route control information packet in the invention of claim 1, 2, 3 or 4,
You can have the routing program log. Then, by causing a time-consuming process such as a file open process for taking a log, and by causing such a time-consuming process as described above, a queue is accumulated, which may disturb the process of the device under test. it can.

[0031]

According to the sixth aspect of the present invention, the test apparatus and the LAN relay device on the side of the device under test transmit the test parameters and the route control information packet to the LAN relay device on the side of the device under test. In the device, the operation of the device under test is confirmed based on the above test parameters and the received route control information packet, and the test result is transmitted to the test device, so that the operator can operate from only the test device side and the test result. Can be obtained on the test device side, and the burden on the operator can be reduced.

According to a seventh aspect of the present invention, the transmission queue is used when the operation of the device under test is tested by transmitting a route control information packet from the LAN relay device of the test device to the LAN relay device of the device under test. When the number of transmission queues is within a predetermined value, a route control information packet is transmitted to the LAN relay device on the device under test side, and when the number of transmission queues exceeds a predetermined value,
Since the device sleeps for a certain period of time, it is possible to send a packet without waiting for the sending side to discard the packet and discarding the packet.

In the eighth aspect of the present invention, the LAN relay device on the test device side is provided with the man-machine interface processing section and the packet sender for transmitting the route control information packet, and the LAN relay device on the device under test side is provided. Since the packet checker is provided and the test result transmitted from the packet checker is received by the LAN relay device on the test device side, the operation of the device under test is confirmed.
The operation of the LAN relay device can be efficiently tested by the operation from the test device side.

According to the ninth aspect of the present invention, the LAN relay device on the test device side is provided with a man-machine interface processing section and a packet sender for transmitting a route control information packet, and the LAN relay device on the device under test side is provided. , Provide a table checker to check the routing information table,
By receiving the test result transmitted from the table checker in the test apparatus of the LAN access point, and then, is confirmed in the change process operation routing information table of the device under test, as with the invention of claim 1 It is possible to check whether the route control information table of the device under test accurately holds the information sent from the test device.

According to a tenth aspect of the present invention, in the eighth or ninth aspect of the present invention, the pseudo information of the network and / or the abnormal data which does not actually exist in the route control information packet is set. Since it is configured to transmit the data to the device under test, it is possible to perform the test assuming the operation as in the inventions of claims 1 and 5, and to perform the test by disturbing the processing of the device under test. it can.

The invention of claim 11 of the present invention is the same as that of claim 8,
In the invention of claim 9 or claim 10 , the packet sender is provided with a function of changing the transmission interval of the route control information packet / dynamically changing it within a certain width, or stopping the transmission of the route control information packet for a certain period of time. Therefore, claim 2
Similar to the invention of claim 4, it is possible to increase the number of times of reception processing in the device under test, shorten the test time, and change the processing timing of the route control information program. The test of the test device can be performed.

[0038]

EXAMPLE FIG. 2 is a diagram showing a normal operating state of a LAN relay device to be tested. In the figure, 10 is a LAN relay device which is a test device, and 20 is an L device which is a device under test.
Each of the LAN relay devices 10 and 20 is an AN relay device, and route control programs 11 and 21 are provided. Each route control program 11 and 21 has a TC
The communication path 30 is connected via the P or UDP layers 12 and 22, the IP layers 13 and 23, and the physical layers 14 and 24. Although not shown, the LAN relay devices 10 and 20 are provided with a route control information table, and as described above,
The IP address of the route control information packet notified from the other LAN relay device is stored in the route control information table owned by each.

In the above-mentioned configuration, in this embodiment, the LAN relay device 10 on the side of the test device is arbitrarily provided with a pseudo route control information packet containing information of a network which does not actually exist and a pseudo route control information packet containing abnormal data. Send at the specified transmission interval (for example, 1 second interval),
Dynamically change the transmission interval value within a certain range,
A packet sender having a function of stopping for a fixed time (for example, 180 seconds) is provided.

The LAN relay device 2 which is the device under test
In 0, a packet check program (hereinafter, referred to as
A packet checker) is provided to detect missing packets and packet abnormalities in the received packets, and transmit them to the LAN relay device 10 on the test device side. Further, a program for checking the route control information table in the LAN relay device 20 as the device under test (hereinafter referred to as a table checker)
Is provided, the route control information table is examined at regular intervals, and the result is transmitted to the LAN relay device 10 on the test device side.

FIG. 3 shows the LAN relay device 10 on the side of the test apparatus, which is provided with the above-mentioned packet sender 15 and a man-machine interface processing section (hereinafter referred to as an MMI processing section) 16 for performing a man-machine interface processing, and also under test. FIG. 3 is a diagram showing a configuration in which a packet checker 25 is provided in the LAN relay device 20 on the device side. In the figure, first, the MMI
From the processing unit 16, the LAN relay device 20 serving as the device under test
A test parameter packet described later is transmitted to the device under test 20 to set parameters. Then, the packet sender 15 transmits pseudo route control information (route control information packet described later).

When the packet checker 25 of the device under test 20 receives the route control information, it compares the expected value created from the test parameter packet with the received information and destroys /
A load status notification packet (described later) indicating the number of lost packets is created and transmitted to the test apparatus 10. The load status notification packet is received by the MMI processing unit of the test apparatus 10, and the number of destroyed / lost packets is displayed on the test apparatus 10.

FIG. 4 shows a LAN relay device 2 as a device under test.
FIG. 3 is a diagram showing a configuration in which a table checker 27 is provided in 0 and the route control information table 26 is checked. In the figure, in order to check the operation of the route control information table 26, first, as in the case of FIG.
A test parameter packet described later is transmitted to the LAN relay device 20 which is the device under test, and the parameters are set in the device under test 20. Then, the packet sender 15 transmits the pseudo route control information. The routing control information program 21 of the device under test 20 updates the routing control information table 26 upon receiving the routing control information.

The table checker 27 compares the IP address (expected value) created from the test parameter packet with the IP address in the table, and if there is a lost IP address or illegal IP address, a table check packet ( (Described later) is created and transmitted to the test apparatus 10. The table check packet is received by the MMI processing unit of the test apparatus 10, and the loss IP address and illegal IP address are displayed on the test apparatus 10.

FIG. 5 is a diagram showing the format of the route control information packet transmitted by the packet sender 15. As shown in the figure, the route control information packet includes a MAC address and an IP address.
It consists of a header and route control data, and the route control data is composed of "command, version, address family" and the like, and one entry of "IP address", "0", "0", and "cost". The length of the route control information packet is 512 bytes or less, and when it is less than 25 entries, the packet length is the number of entries.

The IP address is a C class (an address whose digit number of Net ID is larger than the digit number of Host ID is relatively used in order to avoid interference with other nets connected to the communication path used for the test. Less often) is used. Further, the IP address of each entry is set to a value that is incremented by 256 from the start IP address designated by the operator.
Then, when the maximum value is reached, the process returns to the beginning and returns to "192.1.
The IP address is incremented by 256 from "1.1". When the specified number of entries is reached, one process ends, and this process is repeated.

An integer value of 1 to 15 is entered in the cost. Use 15 for the first iteration, use -1 from the next iteration, and use 15 again for 1. Further, when the packet checker 25 is operated in the device under test 20, the sequence number is set in the packet at the (seq) portion of the first entry.

By transmitting the pseudo route control information in which the IP address is set as described above, the route control function of the device under test can be tested without physically connecting the host as described above. FIG. 6 is a diagram showing the format of the above-mentioned test parameter packet which is transmitted to the packet checker 25 and the table checker 27 and passed to the packet sender 15 (test parameter data only) prior to the test.

As shown in the figure, the test parameter packet comprises a MAC address, an IP header and test parameter data. The test parameter data includes "test parameter packet ID", "starting IP address", "entry number" and "loop". It is composed of "number of times", "transmission interval", and "port number". The “test parameter packet ID” is ID data indicating that this packet is a test parameter packet, and 0x11111111 is set in this embodiment. “Number of entries”, “loop count”, and “transmission interval” are the total number of entries of the routing control information packet transmitted from the packet sender,
The number of repetitions indicating how many times the route control information packet is set as one set, the transmission interval (seconds) of the route control information packet, and the "port number" specify the port of the packet checker or the table checker.

The test parameter packet has the above format, and when the packet checker 25 and the table checker 27 receive the test parameter packet, the expected value of the route control information is created from the test parameter data, and the created expected value is obtained. The value is compared with the actually transmitted route control information or the contents of the route control information table updated by the route control information.

In FIG. 7, the packet checker 25 provided on the device under test 20 side is the MMI processing unit 16 on the test device 10 side.
FIG. 7 is a diagram showing a format of a load status notification packet to be transmitted to the packet checker 25. When the packet checker 25 receives the routing control information packet, the packet checker 25 compares it with the expected value created from the test parameter packet as described above, and sends the next load status notification packet. Create a packet.

As shown in the figure, the load status notification packet comprises a MAC address, an IP header and load status notification data. The load status notification data includes "load status notification packet ID", "total number of packets" and "recv packet". The number of packets, the number of broken packets, and the number of lost packets. The "load status notification packet ID" is ID data indicating that this packet is a load status notification packet, and in this embodiment, it is 0x.
22222222 is set. "Total packet number" is "recv packet number" and "broken packet number"
And the total number of "loss packets" are displayed, and "recv
"Number of packets", "Number of broken packets", "los"
The number of s packets indicates the number of normally received packets, the number of corrupted (garbled data) packets, and the number of lost packets, respectively.

In FIG. 8, the table checker 27 provided on the device under test 20 side is the MMI processing unit 16 on the test device 10 side.
6 is a diagram showing a format of a table check packet to be transmitted to the table checker 27.
6 is compared with the expected value created from the test parameter packet to create the next table check packet.

As shown in the figure, the table check packet is composed of a MAC address, an IP header and table check data. The table check data includes "table check packet ID", "loss IP address", "illegal IP address", and "illegal IP address". Detection time ”. "Table check packet ID"
Is ID data indicating that this packet is a table check packet, and in this embodiment, 0x3333.
3333 is set. The “loss IP address” is an IP address that is not included in the route control information table 26 although it is an IP address included in the route control information packet transmitted by the packet sender 15, “illegal I
“P address” is an IP address that is not included in the routing control information packet transmitted by the packet sender 15, but is an IP address in the routing control information table 26, or
The “detection time” is the time when the “loss IP address” and the “illegal IP address” are detected.

Next, an execution procedure and an execution example in the MMI processing unit 16, the packet sender 15, the packet checker 25, and the table checker 27 will be described. (1) In carrying out the MMI processing unit test, the operator sets the following parameters from an operator console (not shown). Start IP address Set the start IP address of the route control information from [192.1.1.1] to [19].
2.255.255.1]. If the specification is omitted, the starting IP address will be set to [192.1.1.1]. Number of entries The number of entries from the start IP address of the route control information
Specify a decimal number between 1 and 65535. If the specification is omitted, it is set to 1000. 1 packet from the start IP address of the loop count to the number of entries
As a set, how many times to repeat, 10 between 1 and 65535
Specify with a decimal number or * (infinite number of times). If the specification is omitted, it is set to once. Transmission interval The interval at which route control information packets are transmitted, in seconds from 1 to 86.
Specify in decimal number of 400 (24 hours). If the specification is omitted, it is set to 30 seconds. The program on the port specification server side is "ift" or "gate"
Designate with "D" The packet checker is designated by "ift", and the route control information program is designated by "gateD". If the specification is omitted, the route control information program is set. Specifying the host name of the other party Specify the host name of the device under test.

The MMI processing unit 16 creates a test parameter packet format based on the input parameters,
The test parameter data is sent to the packet checker 25 and the table checker 27, and the test parameter data is passed to the packet sender 15. Further, as described above, the MMI processing unit 16 creates test result data based on the load status notification packet and the table check packet transmitted from the packet checker 25 and the table checker 27, and displays the test result data on the operator console.

FIG. 9 is a flow chart showing an execution procedure in the MMI processing section, and this embodiment will be described with reference to the figure. First, a test parameter packet format is created from the data input from the operator console (step S1). Create a socket [socket: AF INET, SOCK DGRAM,
IPPROTO UDP: Transmission procedure in UNIX] (Step S
2) Name the socket [bind: family = AF INET, por
t = 0, addr = 0] (step S3). Send the created test parameter packet to the packet checker 25 [sendto: family = AF INET, port = 520,
IP address obtained by addr = gethostname ()] (Step S
4). Send the created test parameter packet to the table checker 27 [sendto: family = AF INET, port = 200
3, IP address obtained by addr = gethostname ()] (step S5). Start the packet sender 15 and pass the created test parameter packet (test parameter data only)
(Step S6). Receive load status packets and table check packets from the packet checker 25 and the table checker 27.
(recvfrom: family = AF INET, port = 0, addr = 0] (step S7). The packet ID is checked to determine whether the received packet is a load state packet or a table check packet, and the result is displayed on the operator console in a format suitable for them [printf] (step S8). After that, step S
Return to 7. When the transmission in the packet sender 15 is completed (step S9), the socket is returned and [close] is completed (step S10). (2) Packet Sender FIG. 10 is a flow chart showing the execution procedure in the packet sender, and this embodiment will be described with reference to the figure. Create a socket [socket: AF INET, SOCK DGRAM,
IPPROTO UDP] (Step S1) Name the socket [bind: family = AF INET, por
t = 0, addr = 0] (step S2). Create routing control information for one packet (step S
3). The transmission queue is checked (step S4), the number of queues is 50
If it is within the range, proceed to step S6. If the number of queues is not within 50, sleep for 50 ms (step S
5).

When the number of queues is large as described above, 50 m
By s sleeping, if the test program continues to transmit packets depending on the task priority in the test program and the transmission process, the queue of the transmission process is kept waiting or discarded, resulting in wasteful processing. You can avoid problems. Send routing information packet [sendto: family = AF
IP address obtained by INET, port = 520, addr = gethostname ()] (step S6). It is determined whether all the packets for the entry have been transmitted (step S7), and the processes of steps S3 to S6 are repeated until the packets for the entry are all transmitted. Sleep for the transmission interval [sleep: interval ± 5 sec or 180 sec] (step S8). It is determined whether or not the loop count has been transmitted (step S9),
If not transmitted for the number of loops, the process returns to step S3. Return the socket and finish [close] (step S1)
0). (3) Packet Checker FIG. 11 is a flowchart showing the execution procedure in the packet checker, and this embodiment will be described with reference to the figure. Create a socket [socket: AF INET, SOCK DGRAM,
IPPROTO UDP] (Step S1) Name the socket [bind: family = AF INET, por
t = 520, addr = 0] (step S2). Receive test parameter packet [recvfrom: fami
ly = AF INET, port = 0, addr = 0] (step S3). One packet of data (expected value) is created from the test parameter data.

That is, the expected value of the routing control information data that should be originally received is created from the test parameter data (step S4). Receive routing information packet [recvfrom: family = A
F INET, port = 520, addr = 0] (step S5). The received route control information is compared with the expected value created in step S4, and the result is stored in the load state packet (step S6). Send a load status notification packet at regular intervals [send to:
family = AF INET, port = 2000, addr = 0] (Step S
7). It is determined whether or not the number of loops has been received (step S8),
When the number of loops has not been received, the process returns to step S4. Returns the socket and ends [close] (step S
9). (3) Table Checker FIG. 12 is a flowchart showing the execution procedure in the table checker, and this embodiment will be described with reference to the figure. Create a socket [socket: AF INET, SOCK DGRAM,
IPPROTO UDP] (Step S1) Name the socket [bind: family = AF INET, por
t = 520, addr = 0] (step S2). . Receive test parameter packet [recvfrom: fami
ly = AF INET, port = 0, addr = 0] (step S3). One packet of data (expected value) is created from the test parameter data and compared with the contents of the route control information table. If there is an abnormality, the result is stored in the table check packet (step S4). If a value is stored in the table check packet,
Send table check packet [sendto: family = A
F INET, port = 2000, addr = 0] (step S5). It sleeps for a certain period of time and returns to step S4 (step S
6) When the transmission of the packet checker is completed, the socket is returned and [close] is completed (steps S7 and S8). (4) Execution Example FIGS. 13 and 14 are views showing an execution example of the present embodiment. FIG. 13 shows a test result displayed on the operator console of the test apparatus 10 in the configuration of FIG. ,
FIG. 14 shows the test result displayed on the operator console of the test apparatus 10 in the configuration of FIG.

FIG. 13 shows the starting IP address = 192.10.1.1,
When the number of entries = 1000, the number of loops 5 times, and the transmission interval 1 second are set, the test result transmitted from the packet checker is shown. For the IP address = 133.3.4.1, the total number of packets is the first time. At 200, 150 received packets, 5 dropped packets, 45 lost packets, and the second time, 500 total packets received and 400 received packets dropped. It shows that the number of lost packets is 10 and the number of lost packets is 90.

FIG. 14 shows the starting IP address = 192.10.1.1,
When the number of entries = 1000, the number of loops is 5 and the transmission interval is set to 1 second, the table check result transmitted from the table checker may be shown, regardless of the IP address included in the route control information packet. IP addresses not in the route information table (loss IP described above
192.30.250.1 as the address), time 15:20:
002.1 and time 15:25:00, and 192.1.1.1, 192 as the IP address (the above-mentioned illegal IP address) in the route information table despite the IP address not included in the route control information packet. .
1.2.1 indicates that they were detected at time 10:30:46 and time 10:50:46, respectively.

[0062]

The following effects can be obtained in the present invention. (1) Since the routing control information that does not include the pseudo routing control information is present only in the number of interfaces of the hosts that are actually connected, such routing control information has only limited routing control information (hundreds). Cannot be sent.

On the other hand, since the routing control information during actual operation is several thousand or tens of thousands, the above routing control information
The test assuming the operation cannot be performed, and failure identification is incomplete. In the present invention, since pseudo packet control information including network information that does not actually exist is transmitted from the packet sender, it is possible to apparently increase the packet control information and perform a test close to the time of operation. . (2) In the route control program, the route control information is normally sent at intervals of 30 seconds. In the present invention, since the routing control information can be transmitted at an arbitrary interval, it is possible to increase the number of times of reception processing in the device under test, unnecessary discard of packets, buffer shortage due to collision with transmission processing, etc. Can be generated.

Also, the test time can be shortened by shortening the transmission interval. (3) If the transmission interval of the route control information packet is constant, the load on the device under test is also constant. Therefore, in the present invention, the transmission interval is dynamically changed within a certain width.
This changes the way the load is applied to the device under test,
It is possible to perform the test by changing the processing timing of the route control program of the device under test. (4) In the route control in the LAN, when the packet transmission is normally stopped for 180 seconds, the buffer area is released to delete the information in the route control information table of the device under test. After that, when the route control information is transmitted, a buffer area acquisition process is performed.

Therefore, as in the present invention,
By stopping the sending of the route control information, it is possible to make the LAN relay device on the device under test perform the buffer area release processing and the buffer area acquisition processing, and confirm that these processing are executed reliably. can do. Furthermore, the reception process and the table change (addition) process can be overlapped to disturb the process on the side of the device under test.
It becomes possible to sufficiently wash out the failure of the device under test. (5) When a path control information program on the LAN receives abnormal path control information, the information is logged. Also, in order to log information, it takes time to open a file, and a queue accumulates during that time.

Therefore, by setting abnormal data in the route control information as in the present invention, it is possible to cause the above processing to disturb the processing on the side of the device under test, and to identify the failure of the device under test. It becomes possible to perform sufficiently. (6) If there is a problem with the route control and the route control information is not stored in the route control information table, transmission via that route cannot be performed (the route cannot be seen). Therefore, even if there is a problem in the route control and the transmission via the route cannot be performed, the test using the route cannot be performed and the problem cannot be detected.

Therefore, in the present invention, it is checked whether the route control information table accurately holds the information sent from the test device. As a result, the above problems in route control can be solved. (7) In the conventional transmission / reception test, the operator had to operate on both the receiving side and the transmitting side, but in the present invention, the test parameters are transmitted from the test apparatus to the device under test, and the test results are sent. Since the device under test is transmitted to the test device and notified to the operator, the operator can operate only on the side of the test device, and the burden on the operator can be reduced. (8) As described above, if packets are continuously transmitted by the test program (application), the queue of transmission processing may be held or discarded, which may be wasteful processing. Since the transmission queue is checked and the route control information packet is transmitted, an efficient test can be performed without waiting for transmission or packet discard on the transmitting side.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a diagram showing a normal operation state of a LAN relay device to be tested.

FIG. 3 is a diagram showing a configuration of a test using a packet sender and a packet checker.

FIG. 4 is a diagram showing a configuration of a test using a packet sender and a table checker.

FIG. 5 is a diagram showing a format of a route control information packet.

FIG. 6 is a diagram showing a format of a test parameter packet.

FIG. 7 is a diagram showing a format of a load status notification packet.

FIG. 8 is a diagram showing a format of a table check packet.

FIG. 9 is a flowchart showing an execution procedure in the MMI processing unit.

FIG. 10 is a flowchart showing an execution procedure in a packet sender.

FIG. 11 is a flowchart showing an execution procedure in a packet checker.

FIG. 12 is a flowchart showing an execution procedure in the table checker.

FIG. 13 is a diagram showing an execution example of the present embodiment.

FIG. 14 is a diagram illustrating an execution example of the present embodiment.

FIG. 15 is a diagram showing an example of the configuration of a LAN.

[Explanation of symbols]

1,10 LAN relay device on the test equipment side 1a, 16 Man-machine interface processing unit 1b, 15 Packet sender 2,20 LAN relay device on the device under test side 2a, 25 Packet checker 2b, 27 table checker 2c, 11,21 Route control information program 2d, 26 Route control information table 12,22 TCP or UDP layer 13,23 IP layer 14,24 Physical layer 30 communication channels

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-1777889 (JP, A) JP-A-6-284132 (JP, A) JP-A-8-56235 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H04L 12/00

Claims (11)

(57) [Claims] 1. A route control program connected via a communication path.
A test method for LAN access point equipped with a gram, a LAN access point of the test apparatus, in fact set in the pseudo-information routing information packets that do not exist, the test apparatus of the LAN access the routing from The information packet is transmitted to the LAN relay device on the device under test side, and the LAN relay device on the device under test side investigates whether or not the information of the above-mentioned route control information packet is set in the route control information table. Test method for LAN relay device. 2. The test method for a LAN relay device according to claim 1, wherein the transmission interval of the route control information packet is changed and transmitted to the LAN relay device on the side of the device under test. The transmission interval of 3. A routing control information packet, the LAN relaying apparatus according to claim 2, characterized by transmitting the dynamically changed LAN access point of the device under test side within a certain range test Method. 4. The method for testing a LAN relay device according to claim 2, wherein the transmission of the route control information packet is stopped for a certain period of time. 5. The test method for a LAN relay device according to claim 1, 2, 3 or 4, wherein abnormal data is set in a route control information packet. 6. A route control program connected via a communication path.
A method of testing a LAN relay device including a program, wherein the LAN relay device on the test device side to the LAN on the device under test side
The test parameter and the route control information packet are transmitted to the relay device, and the LAN relay device on the side of the device under test confirms the operation of the device under test based on the above test parameter and the received route control information packet, and tests the test result. A method for testing a LAN relay device, which comprises transmitting the data to a device. 7. A route control program connected via a communication path.
A method of testing a LAN relay device including a program, wherein the LAN relay device on the test device side to the LAN on the device under test side
When sending a route control information packet to the relay device to test the operation of the device under test, check the transmission queue, and when the number of transmission queues is within the specified value, send the route control information packet to the LAN relay device on the side of the device under test Then, when the number of transmission queues exceeds a predetermined value, the method for testing a LAN relay device is characterized by sleeping for a certain period of time. 8. A route control program connected via a communication path.
A LAN relay device equipped with a LAN , a test side LAN relay device is provided, and the test device side LAN is provided.
A man-machine interface processing unit that creates test parameter data based on operator input in the relay device and transmits it to the device under test, receives the data indicating the operating state transmitted from the device under test, and displays the test result. , A packet sender for transmitting a route control information packet is provided, and the LAN relay device on the side of the device under test checks the operating state of the device under test based on the received route control information packet,
A LAN relay device characterized in that a packet checker for transmitting the result to the test device is provided, and the test result transmitted from the packet checker is received by the LAN relay device on the test device side to confirm the operation of the device under test. . 9. A route control program connected via a communication path.
A LAN relay device equipped with a LAN , a test side LAN relay device is provided, and the test device side LAN is provided.
A man-machine interface processing unit that creates test parameter data based on operator input in the relay device and transmits it to the device under test, receives the data indicating the operating state transmitted from the device under test, and displays the test result. , A packet sender for transmitting the route control information packet is provided, and it is checked whether or not the information of the route control information packet is set in the route control information table in the LAN relay device on the side of the device under test, and the result is tested by the test device. Is provided with a table checker to be transmitted to the tester, and the test result transmitted from the table checker is received by the LAN relay device on the side of the test device to confirm the change processing operation of the route control information table of the device under test. LAN relay device. 10. Pseudo information of a network that does not actually exist in a route control information packet, and / or
The LAN relay device test apparatus according to claim 8 or 9, wherein abnormal data is set and transmitted to the device under test. 11. The packet sender is provided with a function of changing a transmission interval of the routing control information packet / dynamically changing it within a certain width, or stopping the transmission of the routing control information packet for a certain period of time. The test device for a LAN relay device according to claim 8, 9, or 10.