JPH0685818A - Path setting type router - Google Patents

Abstract

PURPOSE:To select a proper communication path when plural communication paths are in existence between 1st and 2nd information processing units in a network comprising plural LAN equipments. CONSTITUTION:Addresses of destinations corresponding respectively to plural communication paths in existence between 1st and 2nd information processing units are stored in an address table 7. When a transmission reception control device 5 receives a transmission reception frame from the 1st information processing unit to the 2nd information processing unit, the path setting device 2 references the address table 7 to acquire an address of the destination corresponding to the communication path in existence between the information processing units. A path selection device 3 selects an address whose relevant communication path is normal and whose traffic is lowest among those acquired by the path setting device 2 and sends a path setting type transmission reception frame including the received transmission reception frame whose setting destination address is the selected address to a LAN equipment via an address control device 4 and a transmission reception control device 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a router device for connecting a local area network (LAN) device, and more particularly to setting a plurality of communication paths between information processing devices in a network composed of a plurality of LAN devices. The present invention relates to a route setting type router device capable of performing

[0002]

2. Description of the Related Art Bus type LAN device, backbone type LA
A conventional router device for connecting a LAN device such as an N device is
When a frame is sent from one of the two connected LAN devices, the destination address contained in the sent frame is compared with the address set in the router device. When the two match, the frame is transmitted to the other LAN device, and when the two do not match, the frame is blocked.

[0003]

Now, for example, as shown in FIG. 13, information processing devices 131 and 132, a router device 1
33 to 138, terminal LAN devices 139 and 144, relay L
Consider a case where a frame is sent from the information processing device 131 to the information processing device 132 in a network including the AN devices 140 to 143.

Information processing device 131 to information processing device 13
The communication path to the router 2 is the router device 133, 134, 13
6,138, and router devices 133,13
There are two types, one passing through 5, 137 and 138.

However, when a frame is sent from the information processing device 131 to the information processing device 132 via two communication paths, two identical frames are processed by the information processing device 132.
Therefore, it is necessary to send the frame to the information processing device 132 using only one of the two communication paths.

In order to do so, in the conventional router device, for example, the router devices 133, 134, 136 and 136 are used.
It is necessary to set the address of the information processing device 132 in 138 and not set the address of the information processing device 132 in the router devices 135 and 137.

Therefore, even if a plurality of communication routes exist between the information processing devices for transferring frames in the conventional router device, only one communication route is fixedly used, and the communication route is fixed. When there is a failure in the communication, there is a problem that the frame cannot be transferred at all, and the relay L included in the communication path is also present.
There is a problem that the traffic of the AN device tends to be high.

An object of the present invention is to use another communication path when a failure occurs in the communication path by selecting and using an appropriate communication path when there are a plurality of communication paths between information processing devices. Frame can be transferred using a relay LAN
An object of the present invention is to provide a route setting type router device capable of decentralizing the traffic of the device and the communication route.

[0009]

In order to achieve the above-mentioned object, the present invention provides all that exists between a first information processing device and a second information processing device on a network composed of a plurality of LAN devices. An address table in which addresses of transmission destinations corresponding to the respective communication paths are registered;
First transmission / reception control means for receiving a transmission / reception frame from the information processing apparatus to the second information processing apparatus, and the first transmission / reception control means for receiving a transmission / reception frame from the first information processing apparatus. And a route setting unit that retrieves the address table to obtain an address of a destination corresponding to a communication route existing between the first information processing device and the second information processing device, and the route setting unit. Selecting one of the acquired addresses, using the selected address as a set destination address, and creating a route setting type transmission / reception frame including the transmission / reception frame received by the first transmission / reception control unit; A second route output type transmission / reception frame created by the route selection means to a LAN device different from the LAN device to which the first transmission / reception control means is connected; It is provided with a transmission and reception control means.

[0010]

The transmission / reception frame from the first information processing apparatus to the second information processing apparatus is received by the first transmission / reception control means.

When the transmission / reception frame from the first information processing apparatus to the second information processing apparatus is received by the first transmission / reception control means, the route setting means searches the address table and Addresses of destinations corresponding to all communication paths existing between the second information processing device and the second information processing device are acquired.

The route selection means determines, for example, that the corresponding communication route is normal among the addresses acquired by the route setting means,
Further, the one with the lowest traffic is selected, the selected address is used as the set transmission destination address, and the route setting type transmission / reception frame including the transmission / reception frame received by the first transmission / reception control means is created.

The route setting type transmission / reception frame is transmitted by the second transmission / reception control means to a LAN device different from the LAN device connected to the first transmission / reception control means.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a route setting type router device 1 according to the present invention, in which a route setting mechanism 2, a route selection mechanism 3, an address control mechanism 4 and a LAN device to be connected are shown. The transmission / reception control mechanism 5 is connected to one of the LAN devices, the transmission / reception control mechanism 6 is connected to the other LAN device, and an address table 7.

FIG. 2 shows an example of processing by the transmission / reception control mechanisms 5 and 6.
FIG. 3 is a flow chart showing an example of processing of the address control mechanism 4, FIG. 4 is a flow chart showing an example of processing of the route setting mechanism 2, and FIG.

FIG. 6 is a diagram showing a configuration example of a network configured by using the route setting type router device. The information processing devices 11 and 12 and the route setting type router devices 13 and 18 are shown in FIG.
, Router devices 14 to 17, and terminating LAN devices 19 and 2
4 and relay LAN devices 20 to 23.

The information processing device 11 has an address mac1.
However, the route setting type router device 13 has an address mac2.
mac3 has the address m in the route setting type router device 18.
Address m as the address corresponding to ac2 and mac3
ac4 and mac5 have the address m in the information processing device 12.
ac6 is given.

The route setting type router devices 13 and 18 have the configuration shown in FIG.

The routers 14 to 17 have the same functions as the routers described in the prior art, and the routers 14 and 16 have the destination addresses mac2 and mac.
4 through the frame, mac3, mac5
Block the frames that are. Also, the router device 1
Reference numerals 5 and 17 allow the frames whose destination addresses are mac3 and mac5 to pass through and block the frames whose mac2 and mac4 are.

FIG. 7 shows a logical connection configuration of the network shown in FIG. 6. As can be seen from this figure, in the network shown in FIG. Is a route setting type router device 13, router 1
4, 16 and the communication route passing through the route setting type router device 18, the route setting type router device 13, the router devices 15 and 1.
7. There are two routes, the communication route passing through the route setting type router device 18.

Next, the information processing device 11 becomes the information processing device 12
The operation of this embodiment will be described by taking the case of transferring a text as an example.

When the text is transferred to the information processing apparatus 12, the information processing apparatus 11 sets the destination address 83 to the address mac6 of the information processing apparatus 12 and the transmission source address 84 to the address mac1 of the information processing apparatus 11. The transmission / reception frame 81 in the format shown in FIG. 8 is output to the terminal LAN device 19 as shown in FIG.

The transmission / reception frame 81 includes a trailer 82 for synchronization, a transmission destination address 83, and a transmission source address 84.
The control field (C) 85 defines the attributes of the frame data, the text data 86, the field check sequence (FCS) 87 for checking the text data, and the trailer 88.

The transmission / reception control mechanism 5 in the route setting type router device 13 having the configuration shown in FIG. 1 (in this embodiment, the transmission / reception control mechanism 5 is connected to the terminal LAN device 19 and the transmission / reception control mechanism 6 is connected to the relay LAN device 20). Connected)
Detects the trailer 82 of the transmission / reception frame 81 output from the information processing device 11 to the terminal LAN device 19.
(Steps S1 and S2 in FIG. 2), while synchronizing the reception by the trailer 82, the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87 are internally set as shown in FIG. (Steps S3 and S4).

Thereafter, the transmission / reception control mechanism 5 checks the transmission / reception frame 81 by the field check sequence 87 and confirms the final trailer 88 (step S5).

When it is determined that the transmission / reception frame 81 is normal, the address control mechanism 4 sets the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87, which are incorporated therein. To (Step S6
S7) If it is determined that the operation is not normal, the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87, which have been incorporated, are discarded (step S6).
S8).

The address control mechanism 4 sends the destination address 8
3, source address 84, control field 8
5, when the text data 86 and the field check sequence 87 are passed from the transmission / reception control mechanism 5, whether or not the address mac6 set in the destination address 83 is set in the address table 7 as shown in FIG. It is determined (steps S21 and S22).

In this embodiment, the route setting type router device 13 is used.
In the internal address table 7, the route setting type router device 13
Addresses of all transmission destinations and addresses mac of the route setting type router device 13 that can transfer frames from
2, mac3 are registered. Further, in the address table 7, the address assigned to the route setting type router device capable of transferring the frame via the route setting type router device 13 and the other route setting type router device from the route setting type router device. The address of the information processing device capable of transferring the frame without going through the network is registered correspondingly. In the example of FIG. 6, the route setting type router device 18
The addresses mac4 and mac5 given to the information processing device 12 and the address mac6 given to the information processing device 12 are registered in correspondence with each other.

As described above, since the addresses of all the destinations to which the frame can be transferred from the route setting type router device 13 are registered in the address table 7,
The address control mechanism 4 passes the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87 passed from the transmission / reception control mechanism 5 to the route setting mechanism 2 (step S23). , If not registered,
The destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87 passed from the transmission / reception control mechanism 5 are discarded (step S24).

When the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87 are passed from the address control mechanism 4 to the route setting mechanism 2, as shown in FIG. Search for and send to address 83
Address mac6 of the information processing device 12 set to
Find the address corresponding to (steps S31, S3
2).

As described above, in the address table 7, the address mac6 given to the information processing apparatus 12 and the address ma given to the route setting type router apparatus 18 are given.
Since c4 and mac5 are registered in correspondence with each other, the route setting mechanism 2 finds the addresses mac4 and mac5 of the route setting type router device 18 found, and the destination address 83 and the source address passed from the address control mechanism 4. 84, the control field 85, the text data 86, and the field check sequence 87 are passed to the route selection mechanism 3 (step S33).

When the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87 are passed from the route setting mechanism 2 to the route selecting mechanism 3, as shown in FIG. , It is determined whether or not the source address is included (steps S41 and S42).

In this case, the address m of the information processing device 12
Since the destination address 83 in which ac6 is set and the source address in which the address mac1 of the information processing device 11 is set are included, the route selection mechanism 3 performs the process of step S43.

In step S43, when there are a plurality of addresses passed from the route setting mechanism 2, a normal communication route having the lowest traffic is selected from the communication routes corresponding to the addresses. Perform processing.

In the next step S44, when there are a plurality of addresses passed from the route setting mechanism 2, the address corresponding to the communication route selected in step S43 is set as shown in FIG.
As shown in FIG. 3, the setting destination address 103 is set, and the addresses mac2 and mac3 of the own route setting type router device 13 are set.
An address corresponding to the address set in the set destination address 103 in the set source address 104, and the destination address 83 passed from the route setting mechanism 2;
Source address 84, control field 85, text data 86, field check sequence 87
Is set in the transmission data 106, and the control field (C) 105 and the field check sequence (F
CS) 107 added route setting type transmission / reception frame 10
1 is created and the address control mechanism 4 is requested to transmit. When only one address is passed from the route setting mechanism 2, the address passed from the route setting mechanism 2 is set in the set destination address 103, and the other parts 104 to 107 are set.
, A path setting type transmission / reception frame 101 in which the same contents as the above are set is created, and the address control mechanism 4 is requested to transmit.

In this example, since the two addresses mac4 and 5 are passed from the route setting mechanism 2, in step S43, the communication route passing through the router devices 14 and 16 corresponding to the address mac4 and the router device corresponding to the address mac5. A process of selecting a normal communication route having the lowest traffic among the communication routes passing through 15 and 17 is performed.

Further, in step S44, step S43
The address (mac4) corresponding to the communication path selected in step 1 is set as the destination address 103 and the address mac is set.
A route setting type transmission / reception frame 101 shown in FIG. 10 in which 2 is set in the set transmission source address 104 is created, and a transmission request is made to the address control mechanism 4.

When the address control mechanism 4 is requested to transmit, the route setting type transmission / reception frame 101 (however, the trailers 102 and 108) shown in FIG.
Is not added) to the transmission / reception control mechanism 6 to request transmission.

When the transmission / reception control mechanism 6 receives a transmission request for the route setting type transmission / reception frame 101 from the address control mechanism 4 (steps S9 and S10 in FIG. 2), the relay LAN device 2
0 is confirmed based on the fact that there is no trailer on the relay LAN device 20 (steps S11 and S12), the trailer 102 is added to the route setting type transmission / reception frame 101 passed from the address control mechanism 4. 10
8 is added and output to the relay LAN device 20 (step S13).

In this example, the route setting type transmission / reception frame 1
Two addresses mac4 and ma assigned to the route setting type router device 18 as the setting destination address 103 of 01.
Since the address mac4 corresponding to the communication route passing through the router devices 14 and 16 in c5 is set, the route setting type transmission / reception frame 101 output from the route setting type router device 13 is the relay LAN device 20 and the router device. 1
4, it is sent to the relay LAN device 23 via the relay LAN device 21 and the router device 16.

The transmission / reception control mechanism 5 in the route setting type router device 18 having the configuration shown in FIG. 1 (in this embodiment, the transmission / reception control mechanism 5 is connected to the relay LAN device 23, and the transmission / reception control mechanism 6 is connected to the termination LAN device 24). Connected)
Is from the route setting type router device 13 to the relay LAN device 23.
When the trailer 102 of the route setting type transmission / reception frame 101 sent to the router is detected (steps S1 and S2 in FIG. 2), the setting transmission destination address 103, the setting transmission source address 104, and the control field 105 are set while the trailer 102 synchronizes reception. , The transmission data 106 and the field check sequence 107 are taken into the inside (steps S3 and S4).

Thereafter, the transmission / reception control mechanism 5 transmits the path setting type transmission / reception frame 101 to the field check sequence 1
07 and the final trailer 108
Is confirmed (step S5).

Then, the route setting type transmission / reception frame 101
When it is determined that the address is normal, the setting destination address 103, the setting source address 104, the control field 105, the transmission data 106, and the field check sequence 107, which are taken in internally, are passed to the address control mechanism 4 (step S7). When it is determined that the setting is not normal, the setting transmission destination address 103, the setting transmission source address 104, the control field 105, the transmission data 106, and the field check sequence 107 that have been taken in are discarded (step S8).

When the setting destination address 103, the setting source address 104, the control field 105, the transmission data 106, and the field check sequence 107 are passed to the address control mechanism 4, the setting destination address 103 is sent to the setting destination address 103, as shown in FIG. Set address ma
It is determined whether or not c4 is set in the address table 7 (steps S21 and S22).

In this embodiment, the route setting type router device 18 is used.
In the address table 7 in the
Addresses of all transmission destinations and addresses mac of the route setting type router device 18 that can transfer frames from
4 and mac5 are registered. Further, in the address table 7, the address given to the route setting type router device capable of transferring the frame via the route setting type router device 18 and the other route setting type router device from the route setting type router device. The address of the information processing device capable of transferring the frame without going through the network is registered correspondingly. In the example of FIG. 6, the route setting type router device 13
The addresses mac2 and mac3 assigned to the information processing device 11 and the address mac1 assigned to the information processing device 11 are registered in association with each other.

As described above, the address ma assigned to the route setting type router device 18 is stored in the address table 7.
Since c4 and mac5 are registered, the address control mechanism 4 sets the route of the setting destination address 103, the setting source address 104, the control field 105, the transmission data 106, and the field check sequence 107 passed from the transmission / reception control mechanism 5. Will be passed to mechanism 2
(Step S23).

The route setting mechanism 2 receives from the address control mechanism 4 the setting destination address 103 and the setting source address 10
4, control field 105, transmission data 10
6, when the field check sequence 107 is passed, the address table 7 is searched as shown in FIG.
An address registered in correspondence with the address mac4 of the route setting type router device 18 set in the setting destination address 103 is searched (steps S31 and S32).

As described above, in the address table 7, the address mac1 given to the information processing device 11 and the address ma given to the route setting type router device 13 are given.
Since only c2 and mac3 are registered in correspondence, and there is no address registered in correspondence with the address mac4 of the route setting type router device 18 set in the setting destination address 103, the route setting mechanism 2 The address mac4 set to the setting transmission destination address 103 is the address mac4 given to the own route setting type router device 18.
4, mac5 (steps S34, S3
5).

In the case of this example, the setting transmission destination address 103
Since the address mac4 given to the route setting type router device 18 is set to the route setting mechanism 2, the route setting mechanism 2 sets the setting destination address 10 passed from the address control mechanism 4.
3, the setting source address 104, the control field 105, the transmission data 106, the field check sequence 107 from which the setting destination address 103 and the setting source address 104 are removed is passed to the route selection mechanism 3 (step S36). ), If the address set in the setting destination address 103 is not the address assigned to the route setting type router device 18, the setting destination address 103 passed through the transmission / reception control mechanism 5 and the address control mechanism 4, The setting transmission source address 104, the control field 105, the transmission data 106, and the field check sequence 107 are passed to the address control mechanism 4, and it is instructed to transmit through the transmission / reception control mechanism 6 different from the transmission / reception control mechanism 5 on the receiving side ( Step S3
7).

When the receiving field in which the setting destination address 103 and the setting source address 104 are deleted is sent from the route setting mechanism 2, the route selecting mechanism 3 includes the setting destination address 103 and the setting source address 104. Is determined (steps S41 and S4 in FIG. 5).
2).

In this case, since the setting transmission destination address 103 and the setting transmission source address 104 are not included, the route selection mechanism 3 carries out the processing of step S45.

In step S45, the route selection mechanism 3
Is the address mac2 of the route setting type router device 13 set to the source address 84 included in the transmission data 106, and the source address is the address given to the own route setting type router device 18. ma
The address control mechanism 4 is requested to create a response frame having the address mac4 corresponding to the address mac2 of the c4 and mac5, and to transmit it using the transmission / reception control mechanism 5 on the receiving side. The transmission data 106 (composed of the transmission destination address 83, the transmission source address 84, the control field 85, the text data 86, and the field check sequence 87 of the transmission / reception frame 81) passed from the It requests the address control mechanism 4 to transmit.

When the transmission of the response frame is requested, the address control mechanism 4 passes the response frame to the transmission / reception control mechanism 5.

When the response frame is passed (steps S9 and S10 in FIG. 2), the transmission / reception control mechanism 5 confirms that there is no data on the relay LAN device 23 (step S1).
1, S12), and the response frame to which the synchronization trailer is added is transmitted to the relay LAN device 23 (step S13).

Since the destination address of this response frame is the address mac2 of the route setting type router device 13, it is sent to the route setting type router device 13 via the router device 16 and the router device 14. When the route setting type router device 13 receives the response frame, the route setting type transmission / reception frame 101 is transmitted to the route setting type router device 1.
Confirm that it was received in 8. Further, the route setting type router device 13 predicts the traffic used when selecting the communication route in step S43 based on the time from the transmission of the route setting type transmission / reception frame 101 to the reception of the response frame. . If the response frame corresponding to the transmitted route setting type transmission / reception frame 101 cannot be received, it is determined that a failure has occurred in the communication route transmitting the route setting type transmission / reception frame 101, and step S4
When the communication route is selected in step 3, the communication route is not selected for a certain period.

When the transmission of the destination address 83, the source address 84, the control field 85, the text data 86, and the field check sequence 87 is requested, the address control mechanism 4 passes them to the transmission / reception control mechanism 6.

The transmission / reception control mechanism 6 uses the transmission destination address 83,
Source address 84, control field 85, text data 86, field check sequence 87
Is passed (steps S9 and S10), it is confirmed that there is no data on the terminating LAN device 24 (step S9).
11, S12), the transmission / reception frame to which the trailer for synchronization is added is output to the terminal LAN device 24 (step S1).
3).

Since the address mac6 of the information processing device 12 is set in the transmission destination address 83 of the transmission / reception frame 81, the information processing device 12 is terminated by the terminal LAN device 24.
The transmission / reception frame 81 output to is received.

FIG. 11 shows that the communication path between the information processing device 11 and the information processing device 12 is the route setting type router device 13,
When only those passing through the router devices 14 and 16 and the route setting type router device 18 are set, that is, the route setting is made in the address table 7 in the route setting type router device 13 in association with the address mac6 of the information processing device 12. Addresses mac4 and mac assigned to the type router device 18
5 is an operation explanatory diagram when only mac4 of 5 is registered. FIG.

When the transmission / reception frame in which the address mac6 of the information processing device 12 is set as the destination address is output from the information processing device 11, the route setting type router device 1
Reference numeral 3 includes the above-mentioned transmission / reception frame, creates a route setting type transmission / reception frame in which the set transmission / reception address is the address mac4 of the route setting type router device 18, and outputs it.

Since the set destination address of the route setting type transmitting / receiving frame is mac4, the route setting type transmitting / receiving frame is added to the route setting type router device 18 via the router devices 14 and 16.

When the route setting type transmission / reception frame is added, the route setting type router device 18 transmits a response frame in which the destination address is the address mac2 corresponding to the setting destination address mac4 included therein. This response frame is sent to the route setting type router device 13 via the router devices 16 and 14.

When a route setting type transmission / reception frame addressed to itself is added to the route setting type router device 18, the transmission / reception frame included therein is transmitted to the destination address mac6.
To the information processing device 12 indicated by.

FIG. 12 shows that the communication path between the information processing device 11 and the information processing device 12 is the route setting type router device 13,
When two are set, one passing through the router devices 14 and 16 and the route setting type router device 18 and one passing through the route setting type router device 13, the router devices 15 and 17 and the route setting type router device 18. That is, in the address table 7 in the route setting type router device 13, the route setting type router device 18 is associated with the address mac6 of the information processing device 12.
FIG. 7 is an operation explanatory diagram when two addresses mac4 and mac5 given to the are set.

When the transmission / reception frame in which the address mac6 of the information processing device 12 is set as the destination address is output from the information processing device 11, the route setting type router device 1
Reference numeral 3 selects one of the two communication paths existing between the information processing apparatus 12 and the information processing apparatus 12, that is, a normal communication path having a lower traffic.

When a communication route passing through the route setting type router device 13, the router devices 14 and 16, and the route setting type router device 18 is selected, the route setting type router device 1 is selected.
Reference numeral 3 includes a transmission / reception frame from the information processing device 11, and one of two addresses given to the route setting type router device 18 as a setting transmission destination address mac4.
When the communication path passing through the route setting type router device 13, the router devices 15 and 17, and the route setting type router device 18 is selected, the transmission / reception frame from the information processing device is generated. A route setting type transmission / reception frame including the setting destination address and the other address mac5 given to the route setting type router device 18 is created, and the created route setting type transmission / reception frame is transmitted.

When a route setting type transmission / reception frame in which mac4 is set in the setting destination address is output from the route setting type router device 13, the route setting type transmission / reception frame is routed through the router devices 14 and 16. It is added to the router device 18. In addition, the route setting type router device 13
When the route setting type transmission / reception frame in which mac5 is set to the setting transmission destination address is output from the route setting type transmission / reception frame to the route setting type router device 18 via the router devices 15 and 17.

When the route setting type transmission / reception frame in which mac4 is set to the set transmission destination address is added, the route setting type router device 18 outputs a response frame in which the address mac2 corresponding to the address mac4 is set as the transmission destination address. This response frame is sent to the route setting type router device 13 via the router devices 16 and 14. When the route setting type transmission / reception frame addressed to itself is added, the route setting type router device 18 transmits the transmission / reception frame included therein to the information processing device 12 indicated by the destination address mac6.

When a route setting type transmission / reception frame in which mac5 is set to the set destination address is added, the route setting type router device 18 outputs a response frame in which the address mac3 corresponding to the address mac5 is the destination address. To do. This response frame is the router device 17,
It is sent to the route setting type router device 13 via 15. When the route setting type transmission / reception frame addressed to itself is added, the route setting type router device 18 transmits the transmission / reception frame included therein to the information processing device 12 indicated by the destination address mac6.

[0071]

As described above, the route setting type router device of the present invention corresponds to each communication route existing between the first and second information processing devices on the network constituted by a plurality of LAN devices. When the transmission / reception frame from the first information processing apparatus to the second information processing apparatus is received, the address of the destination to be transmitted is stored in the address table, and the address table is searched to search the first information processing apparatus and the first information processing apparatus. The addresses of the transmission destinations corresponding to all the communication paths existing between the two information processing devices are acquired, and one of the acquired addresses is acquired.
One of which is set as a destination address and outputs a route setting type transmission / reception frame including a transmission / reception frame from the first information processing device to the LAN device. Since it is possible to transfer a transmission / reception frame by selecting an appropriate communication path from among the above communication paths, only one fixed communication path can be provided between the first and second information processing devices. Compared with the conventional example, which has no effect, it is possible to disperse the communication path and the traffic of the LAN device, and even when a failure occurs in one communication path, another communication path is used. Therefore, it is possible to transfer the transmission / reception frame.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a route setting type router device according to the present invention.

FIG. 2 is a flowchart showing a processing example of transmission / reception control mechanisms 5 and 6.

FIG. 3 is a flowchart showing a processing example of an address control mechanism 4.

FIG. 4 is a flowchart showing a processing example of a route setting mechanism 2.

FIG. 5 is a flowchart showing a processing example of a route selection mechanism 3.

FIG. 6 is a configuration diagram showing a configuration example of a network using a route setting type router device.

7 is a diagram showing a logical connection configuration between information processing devices in the network shown in FIG.

FIG. 8 is a diagram showing a configuration example of a transmission / reception frame.

FIG. 9 is an operation explanatory diagram of transmission / reception control mechanisms 5 and 6.

FIG. 10 is a diagram showing a configuration example of a route setting type transmission / reception frame.

FIG. 11 is an operation explanatory diagram when only one communication path is set between the information processing devices.

FIG. 12 is an operation explanatory diagram when a plurality of communication paths between information processing devices are set.

FIG. 13 is a diagram for explaining a problem of the conventional technique.

[Explanation of symbols]

 1 ... Route setting router device 2 ... Route setting mechanism 3 ... Route selection mechanism 4 ... Address control mechanism 5,6 ... Transmission / reception control mechanism 7 ... Address table 11,12,131,132 ... Information processing device 13,18 ... Route setting Type router device 14-17, 133-138 ... Router device 19, 24, 139, 144 ... Termination LAN device 20-23, 140-143 ... Relay LAN device

Claims (2)

[Claims] 1. A destination address corresponding to each of all communication paths existing between a first information processing device and a second information processing device on a network composed of a plurality of LAN devices is registered. Address table, first transmission / reception control means for receiving a transmission / reception frame from the first information processing apparatus to the second information processing apparatus, and the first transmission / reception control means for the first information processing. The address table is searched by receiving a transmission / reception frame from the device, and an address of a transmission destination corresponding to a communication path existing between the first information processing device and the second information processing device is acquired. The route setting means and one of the addresses acquired by the route setting means are selected, the selected address is set as a destination address for transmission, and the first transmission / reception control means receives A route selection unit that creates a route setting type transmission / reception frame including a transmission / reception frame, and a route setting type transmission / reception frame created by the route selection unit to a LAN device different from the LAN device to which the first transmission / reception control unit is connected. A route setting type router device including a second transmission / reception control means for outputting. 2. The route selecting means selects one of the addresses selected by the route setting means, which has a normal communication path and has the lowest traffic. Routing router device.