JPH1093617A - Standby switching system for communication processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a standby switching system for communication processing device which is capable of the same communication processing device switching as conventional even in the system constitution consisting of plural current communication processing devices and one standby communication processing device. SOLUTION: Plural communication processing devices 100, 200, 300 are connected to a central information processor 110 through a matrix line switching device 120 by a LAN line and are connected to LAN lines through a common matrix in the switching device 130. When a current communication processing device gets faulty in this case, the faulty communication processing device name, the faulty communication processing device connected line name, and the faulty communication information processor connected line address are reported from the central information processor 110 to the standby communication processing device, and the standby communication processing device controls the matrix line switching device to switch the LAN line of the faulty current communication processing device to that of the standby communication processing device, thus realizing standby switching for plural current communication processing devices with one standby communication processing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standby switching system for a communication processing apparatus, and more particularly to a TCP / IP (transm.
In a network system using an ission control protocol / internet protocol), the present invention relates to a standby switching system of a communication processing device that can switch to a standby communication processing device when a failure occurs in a communication processing device connected to a host computer.

[0002]

2. Description of the Related Art Conventionally, as a standby switching system of this kind of communication processing apparatus, for example, Japanese Patent Laid-Open No. 6-343074 is known.
In the publication, a plurality of line adapters are provided in a host computer, the same LAN address is set for each line adapter, and if one line adapter fails,
By logically disconnecting the failed line adapter by the input / output processor in the host computer and logically incorporating a spare line adapter, various other devices connected to the LAN line are made aware of the switching of the line adapter. A fault-tolerant system that allows continuation of communication without any problem has been proposed.

[0003]

In the above-described conventional system, when a device to be switched (line adapter) is connected via a network, a switching control device (input / output processor) that can be switched by a host computer is provided. There is a problem that it is necessary to connect with a network similarly to the switching target device.

The reason is that, since the switching control device is directly controlled from the host computer, the switching control can be performed from the host computer when the switching target device to be controlled is connected via a network. This is because the switching control device also needs to be connected via a network.

[0005] Accordingly, the present invention has been made in view of the above-described problems. In switching a communication processing device connected to a network to a standby device, the standby device to be switched itself performs switching control, and performs switching. An object of the present invention is to provide a spare switching system for a communication processing device that can eliminate the need for a control device.

A second object of the present invention is to provide a method for switching between communication processing apparatuses in a network configuration having a plurality of active communication processing apparatuses and a single standby communication processing apparatus. It is to provide a system.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a host computer and a first computer which is connected to the host computer via a line switching device.
At least two communication processing devices connected by the same LAN line, and an information processing device connected by the second LAN line via a line switching device shared with the two communication processing devices. In the network system, each of the two communication processing devices may be configured to control each of the line switching devices, to dynamically change an IP address, and to separate from an IP address of the communication processing device. Another IP dedicated to communication with the information processing device
And an address, and one of the two communication processing devices is currently used, and the other is used as a spare, between the host computer and each of the communication processing devices, and between each of the communication processing devices and the information processing device. Communication is performed by TCP / IP, and when a failure occurs in the communication processing device, the spare communication processing device receives a notification from the host computer, controls each of the line switching devices, and causes a failure in the communication processing device. Is physically separated from the first LAN line and the second LAN line, and the second LAN line is switched to a spare communication processing device. A spare switching system for a communication processing device is provided, wherein the address is changed to an IP address dedicated to communication with the information processing device.

Thus, according to the spare switching system for communication processing devices of the present invention, one of the at least two communication processing devices is set to the active and the other is set to the standby mode. The processing device receives the notification from the host computer, controls each of the line switching devices, and replaces the failed communication processing device with the first LA.
Physically disconnecting from the N line and the second LAN line, switching the second LAN line to a spare communication processing device, and further changing the IP address of the communication processing device visible from the information processing device after the switching. By changing to a dedicated IP address for communication with the device,
Even after the switching, the communication can be continued without making the information processing device aware of the switching of the communication processing device.

In order to achieve the second object, a spare switching system for a communication processing device according to the present invention comprises a central processing unit and a matrix line switching device.
In a network system in which a plurality of communication processing devices connected by N lines and the plurality of communication processing devices are connected to a LAN line via a shared matrix line switching device, when a failure of an active communication processing device occurs, From the central information processing device, a notification including a faulty communication processing device name, a faulty communication processing device connection line name, and a faulty communication processing device connection line address is sent to the standby communication processing device, and the standby communication processing device L on the side of the active communication processing unit which failed by controlling the matrix line switching unit.
An AN line is switched to the standby communication processing device, and the standby communication processing device 1 is connected to the plurality of active communication processing devices.
Standby switching is realized by a stand.

According to the present invention, a central information processing device,
Network system comprising a plurality of communication processing devices connected via a LAN line via one matrix line switching device, and a plurality of communication processing devices and a LAN line connected via one matrix line switching device In the content of the switching instruction from the central information processing device to the standby communication processing device, the "failure communication processing device name", "failure communication processing device connection line name", and "failure communication processing device connection line address" , The standby communication processing device can switch to the standby communication processing device in which the line address of the communication processing device for the connection line is dynamically changed. That is, according to the present invention, it is not necessary for the active communication processing device and the standby communication processing device to have the same line address, and the communication processing device switching is performed even in a network configuration having a plurality of active communication processing devices and one standby communication processing device. It can be performed.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram showing a system configuration according to a first embodiment of the present invention.

Referring to FIG. 1, in the embodiment of the present invention, a host computer 10, a LAN line 70 connected to the host computer 10, line switching devices 40 and 50 connected to the LAN line 70, A communication processing device 20 connected to the host computer 10 via the line switching device 40;
A communication processing device 30 connected via the line switching device 50, a line switching device 60 connected to the communication processing devices 20 and 30, a LAN line 80 connected to the line switching device 60, And an information processing device 90 to be connected.

The communication processing devices 20 and 30 are connected to the line switching devices 40 and 50 and the line switching device 60 by a line switching device control line, respectively, and control each line switching device using the line switching device control line. can do. The communication processing device 20 has an IP address 100 for the LAN line 80, and the communication processing device 30 has an IP address 200 for the LAN line 80. Each of the communication processing devices 20 and 30 has an IP address 300 as an IP address dedicated to communication with the information processing device 90.

Next, the operation of the first embodiment of the present invention will be described.

Referring to FIG. 1, the communication processing device 20 comprises:
When activated, the IP address for LAN line 80 is changed to IP
The address is set to 100 and then the line switching device 40
To connect the communication processing device 20 to the LAN line 70. Similarly, when the communication processing device 30 is started, the IP address for the LAN line 80 is set to the IP address 200, and then the line switching device 50 is controlled to connect the communication processing device 30 to the LAN line 70.

Here, assuming that the communication processing device 20 is active and the communication processing device 30 is in standby, when a connection request is received from the host computer 10 to the communication processing device 20, the communication processing device 20 controls the line switching device 60. After the communication processing device 20 is connected to the LAN line 80, the IP address 10
0 is changed to the IP address 300. Information processing device 90
Sets the IP address of the communication processing device to the IP address 300
Can communicate with the communication processing device 20.

Next, when the communication processing device 20 becomes an obstacle,
The host computer 10 sends a switching request to the communication processing device 30. Upon receiving the switching request, the communication processing device 30 controls the line switching device 40 to disconnect the communication processing device 20 from the LAN line 70, and then controls the line switching device 60 to connect the communication processing device 20 to the LAN line 8.
0, and the communication processing device 30 and the LAN line 80 are connected. Thereafter, the communication processing device 30 sets the IP address 2
00 is changed to the IP address 300. Thereby, the information processing apparatus 90 changes the IP address of the communication processing apparatus to the IP address 30 without being aware that the communication processing apparatus has been switched from the communication processing apparatus 20 to the communication processing apparatus 30.
Communication can be continued as 0.

Further, the communication processing device 20 sets the IP address for the LAN line 80 to the IP address 100 by restarting after recovery from the failure, and then controls the line switching device 40 to communicate with the communication processing device 20. The LAN line 70 is connected.

Thus, the communication processing device 20 becomes a new standby device, and when the communication processing device 30 fails, the host computer 10 sends a switching request to the communication processing device 20. Upon receiving the switching request, the communication processing device 20 controls the line switching device 50 to disconnect the communication processing device 30 from the LAN line 70, and then controls the line switching device 60 to disconnect the communication processing device 30 from the LAN line 80. , Communication processing device 20 and LAN line 80
Connect. After that, the communication processing device 20 changes the IP address 100 to the IP address 300. Thereby, the information processing apparatus 90 can continue the communication using the IP address of the communication processing apparatus as the IP address 300 without being aware that the communication processing apparatus has been switched from the communication processing apparatus 30 to the communication processing apparatus 20. .

[Embodiment 1] Next, the first embodiment of the present invention will be described.
Examples of the present invention will be described in detail with reference to the drawings in order to more specifically describe the embodiments.

FIG. 2 is a block diagram showing a system configuration according to one embodiment of the present invention. As shown in FIG. 2, in the present embodiment, a parallel A
The COS 7800 is used as the communication processing device 20 or 30 as N3.
PC-98 as the information processing device 90 using the 805 type FNP
Using a personal computer, parallel ACOS7800 and N380
FDDI loop between 5 type FNP (LAN line 70)
And the N3805 FNP and the PC-98 personal computer were connected by Ethernet (LAN line 80).

More specifically, in one embodiment, the present invention provides a parallel ACOS 7800 and a parallel ACO
FDDI loop connected to S7800, line switching devices 40 and 50 connected to the FDDI loop, and N3805 type FNP (communication processing device 20) connected via parallel ACOS7800 and line switching device 40
, Parallel ACOS7800 and line switching device 50
N3805 type FNP (communication processing device 30) and N3805 type FNP (communication processing device 20, 3
0), a line switching device 60, an Ethernet connected to the line switching device 60, and a PC-98 personal computer connected to the Ethernet.

N3805 type FNP (communication processing unit 20,
30) are respectively connected to the line switching devices 40 and 50 and the line switching device 60 via a line switching device control line, and each line switching device can be controlled using the line switching device control line. N3
The 805 type FNP (communication processing device 20) has an IP address (133.206.7.1) for Ethernet,
The N3805 type FNP (communication processing device 30) has an IP address (133.206.7.2) for Ethernet. Also, N3805 type FNP (communication processing devices 20, 3
0) are dedicated I-communications with a PC-98 personal computer.
It has (133.206.7.3) as the P address.

Next, the operation of one embodiment of the present invention will be described.

FIG. 3 shows the N3805 type FNP shown in FIG.
It is a flow chart which shows a flow of processing of starting processing means of (communication processing unit 20).

Referring to FIGS. 2 and 3, N3805
When activated, the type FNP (communication processing device 20)
The activation processing means in the 05-type FNP (communication processing device 20) changes the IP address for Ethernet to (133.2).
06.7.1) (step 301), and then controls the line switching device 40 to connect the N3805 type FNP (communication processing device 20) to the FDDI loop (step 302), and to set the N3805 type FNP (communication processing device). The startup processing of 20) ends.

FIG. 4 shows the N3805 type FNP shown in FIG.
It is a flow chart which shows a flow of processing of starting processing means of (communication processing unit 30).

Referring to FIGS. 2 and 4, N3805
Similarly, when the type FNP (communication processing device 30) is activated, the IP address for Ethernet is set to (13) by the activation processing means in the N3805 type FNP (communication processing device 30).
3.206.7.2) (step 401), and then control the line switching device 50 to control the N3805 type FN.
P (communication processing device 30) and FDDI loop are connected (step 402), and N3805 type FNP (communication processing device 3)
The startup process of 0) is completed.

Here, the N3805 type FNP (communication processing device 20) is currently used, while the N3805 type FNP (communication processing device 3) is used.
0) is reserved, when a connection request is received from the parallel ACOS 7800, which is the host computer, to the N3805 type FNP (communication processing device 20), the N3805 type FNP
The NP (communication processing device 20) performs processing according to the following procedure by the host request processing means in the N3805 type FNP (communication processing device 20).

FIG. 5 shows the N3805 type FNP shown in FIG.
It is a flowchart which shows the flow of a process of the host request processing means of (communication processing apparatus 20).

Referring to FIGS. 2 and 5, first, a request from the parallel ACOS 7800 as a host computer is checked (step 501). Since this is a connection request, control of the line switching device 50 (step 502) is performed. After skipping and controlling the line switching device 60 to connect the N3805 type FNP (the communication processing device 20) to the Ethernet (step 503), the IP address for the Ethernet is changed to (133.206.7.3) ( Step 504), and terminates the host request processing of the N3805 type FNP (communication processing device 20). The PC-98 personal computer, which is an information processing device, uses the IP of the communication processing device.
N380 with the address as (133.206.7.3)
It can communicate with a type 5 FNP (communication processing device 20).

Next, when the N3805 type FNP (communication processing unit 20) becomes a failure, the parallel ACOS 7800 which is the host computer sends a switching request to the N3805 type FNP (communication processing unit 30). The N3805 type FNP (communication processing device 30) that has received the switching request
Processing is performed by the host request processing means in the N3805 type FNP (communication processing device 30) according to the following procedure.

FIG. 6 shows the N3805 type FNP shown in FIG.
It is a flowchart which shows the flow of a process of the host request processing means of (communication processing apparatus 30).

Referring to FIG. 2 and FIG. 6, first, a request from the parallel ACOS 7800 as the host computer is checked (step 601). Since this is a switching request, the line switching device 40 is controlled to control the N3805 type FNP. (Communication processing device 20)
The network is disconnected from the loop (step 602), and then the line switching device 60 is controlled to disconnect the N3805 type FNP (the communication processing device 20) from the Ethernet, and connect the N3805 type FNP (the communication processing device 30) to the Ethernet (step 603). . Thereafter, the N3805 type FNP (the communication processing device 30) changes the IP address for Ethernet to (133.206.7.3). As a result, the PC-98 personal computer, which is the information processing device, can communicate with the communication processing device without being aware that the communication processing device has been switched from the N3805 type FNP (the communication processing device 20) to the N3805 type FNP (the communication processing device 30). The communication can be continued with the IP address of (133.206.7.3).

The N3805 type FNP (communication processing unit 20) restarts after recovery from a failure, thereby
The startup processing means in the 805 type FNP (communication processing device 20) uses the I / O interface for Ethernet according to the procedure shown in FIG.
The P address is set to (133.206.7.1) (step 301), and thereafter the line switching device 40 is controlled to control the N3805 type FNP (communication processing device 20) and the FDDI.
Connect the loop (step 302) and use the N3805 type FN
The startup processing of P (communication processing device 20) ends.

As a result, the N3805 type FNP (communication processing unit 20) becomes a new standby device, and the N3805 type FNP
When the NP (communication processing device 30) fails, the parallel ACOS 7800 sends a switch request to the N3805 type FNP (communication processing device 20). N3805 type FNP (communication processing device 20) that received the switching request
Performs the following processing according to the procedure shown in FIG. 5 by the host request processing means in the N3805 type FNP (communication processing device 20).

Referring to FIGS. 2 and 5, first, a request from the parallel ACOS 7800 as a host computer is checked (step 501). Since this is a switching request, the line switching device 50 is controlled to control the N3805 type FNP. (Communication processing device 30) is disconnected from the FDDI loop (step 502), and then the line switching device 60 is controlled to disconnect the N3805 type FNP (communication processing device 30) from the Ethernet, and to disconnect the N3805 type FNP.
The NP (communication processing device 20) is connected to the Ethernet (step 503). Thereafter, the N3805 type FNP (communication processing device 20) changes the IP address for Ethernet to (133.206.7.3). As a result, the PC-98 personal computer, which is an information processing device, can communicate with the communication processing device without being aware that the communication processing device has been switched from the N3805 type FNP (the communication processing device 30) to the N3805 type FNP (the communication processing device 20). The communication can be continued with the IP address of (133.206.7.3).

[Second Embodiment] Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 7, according to the second embodiment of the present invention, a central information processing device 110, a LAN line 140 connected to central information processing device 110, a central information processing device 110 and LAN line 140 And a communication processing device 100 connected via the matrix line switching device 120. Similarly, the matrix line switching device 120
, A communication processing device 300 connected via a matrix line switching device 120, and a communication processing device 100, a communication processing device 200, and a matrix line connected to the communication processing device 300 Switching device 130 and matrix line switching device 1
30 and a LAN line 160 similarly connected to the matrix line switching device 130.
And three communication processing devices 100,
From 200, 300 to each matrix line switching device 12
0 and 130 can be controlled.

Next, the operation of the second embodiment of the present invention will be described in detail with reference to FIG.

Communication processing device 100 and communication processing device 200
Is an active system, the communication processing device 300 is a standby system, and connection of the active communication processing device will be described.

When activated, the communication processing device 100 controls the matrix switching device 130 to
00 and the LAN line 150 and the LAN line 160 are disconnected. Next, the matrix line switching device 120 is controlled to connect the communication processing device 100 to the LAN line 140.

When the communication processing device 200 is also started, the matrix switching device 130 is controlled to
00, the LAN line 150 and the LAN line 160 are disconnected. Next, the matrix line switching device 120 is controlled to connect the communication processing device 200 to the LAN line 140.

When the communication processing device 300 is also activated, it controls the matrix switching device 130 so that the communication processing device 30
0 and the LAN line 150 / LAN line 160 are disconnected.
Next, the matrix processing unit 120 is controlled to connect the communication processing device 300 to the LAN line 140.

Next, a connection request comes from the central information processing device 110 to the communication processing device 100. Central information processing device 11
0, the communication request from the communication processing apparatus 100
"Connect to line 150" and "LAN line 1"
50 is the IP address 170 ". In the communication processing device 100, after setting the IP address for the LAN line 150 to the IP address 170, the matrix line switching device 13
0 is controlled to connect to the LAN line 150.

Similarly, a connection request is sent from central information processing device 110 to communication processing device 200. In this case, the connection request from the central information processing device 110 includes “the communication processing device 2
00 connects to the LAN line 160 ".
Information that "the IP address for the LAN line 160 is the IP address 180" is included. After setting the IP address for the LAN line 160 to the IP address 180, the communication processing device 200 controls the matrix line switching device 130 to connect to the LAN line 160.

At this time, the IP address from the LAN line 150 to the communication processing device 100 is the IP address 170
Thus, communication can be performed using the IP address of the communication processing apparatus 100 as the IP address 170.

Similarly, the IP address from the LAN line 160 to the communication processing device 200 is the IP address 180
Thus, communication can be performed with the IP address of the communication processing device 200 as the IP address 180.

From the LAN line 150, the communication processing device 20
0 and cannot be connected to the communication processing device 300,
Similarly, it is not possible to connect to the communication processing device 100 and the communication processing device 300 from the LAN line 160.

Next, the communication processing device 100 becomes an obstacle,
A procedure for switching to the communication processing device 300 will be described.

The central information processing device 110 that has detected the failure of the communication processing device 100 issues a switching instruction to the communication processing device 300. The contents of the switching instruction include (a)
"The communication processing apparatus 100 has failed", (b)
"The communication processing device 100 is connected to the LAN line 150", and (c) "LAN of the communication processing device 100
The communication processing device 300 sends the matrix processing device 100 the L and the communication processing device 100 to the matrix line switching device 120 in accordance with the above information.
An instruction to disconnect from the AN line 140 is issued.

Further, the communication processing device 300 issues an instruction to the matrix line switching device 130 to disconnect the communication processing device 100 and the LAN line 150. Thereafter, the IP address on the communication processing device 300 is changed to the IP address 170 used by the communication processing device 100, and a connection request with the LAN line 150 is made to the matrix line switching device 130.

Thus, the IP address from the LAN line 150 to the communication processing device 300 is the IP address 1
70, and the communication can be continued with the IP address of the communication processing device 300 as the IP address 170.

The communication processing apparatus 100 is disconnected from the LAN line 140 and the LAN line 150, and can perform a failure recovery process. Then, after performing a fault recovery on the communication processing device 100 and restarting the communication processing device 100, the communication processing device 100 and the LAN line 140 are connected by controlling the matrix line switching device 120.
Thereby, the communication processing device 100 becomes a new standby communication processing device.

Next, if the communication processing device 200 fails in this state, the central information processing device 110 sends a switching request to the communication processing device 100. The communication processing device 100 that has received the switching request controls the matrix line switching device 120 to disconnect the communication processing device 200 from the LAN line 140. Next, the matrix line switching device 130 is controlled to control the LAN line 160 and the communication processing device 20.
Disconnect 0. Thereafter, the communication processing device 100 changes the IP address to the IP address 180, and
0 and the LAN line 160 are connected. With this, LAN
The IP address of the communication processing device 100 from the line 160 is the IP address 180, and the communication processing device 100
The communication can be continued using the IP address of the IP address 180 as the IP address 180.

The communication processing device 200 is disconnected from the LAN line 140 and the LAN line 160, and can perform a failure recovery process. After performing a fault recovery for the communication processing device 200 and restarting,
The matrix line switching device 120 is controlled to connect the communication processing device 200 to the LAN line 140. This allows
The communication processing device 200 becomes a new standby device.

Further, if the communication processing device 300 fails in this state, the central information processing device 110 sends a switching request to the communication processing device 200. Upon receiving the switching request, the communication processing device 200 controls the matrix line switching device 120 to switch the communication processing device 300 to the LAN line 1.
Disconnect from 40. Next, the matrix line switching device 130 is controlled so that the LAN line 150 and the communication processing device 300
Disconnect. Thereafter, the communication processing device 200 changes the IP address to the IP address 170, and
And the LAN line 150 are connected. Accordingly, the IP address from the LAN line 150 to the communication processing device 200 is the IP address 170, and communication can be continued with the IP address of the communication processing device 200 as the IP address 170.

[Embodiment 2] Next, the second embodiment of the present invention will be described.
Examples of the present invention will be described in detail with reference to the drawings in order to more specifically describe the embodiments.

Hereinafter, as a second embodiment of the present invention,
A description will be given using a system in which the parallel ACOS 7800 is used as a central information processing device, an N3805 type FNP is used as a communication processing device, the parallel ACOS 7800 and the N3805 type FNP are connected by an FDDI loop, and a LAN line under the N3805 type FNP is connected by Ethernet.

FIG. 8 is a diagram for explaining a second embodiment of the present invention. In the figure, for example, a parallel ACOS780
“0” (central information processing device 110) indicates that it corresponds to the central information processing device 110 in FIG.

Referring to FIG. 8, the parallel ACOS 78
00 (central information processing device 110) and a parallel ACOS 780
0 (central information processing device 110) and the FDDI loop (L
A matrix line switching device 120 connected by an AN line 140, and a parallel ACOS 7800 (central information processing device 11) via the matrix line switching device 120.
N3805 type FNP (communication processing device 1) connected to
00) and the parallel ACOS 7800 (central information processing device 110) via the matrix line switching device 120.
N3805 FNP (communication processing device 20
0) and a 3805 type FNP connected to the parallel ACOS7800 through the matrix line switching device 120
(Communication processing device 300), N3805 type FNP (communication processing device 100), N3805 type FNP (communication processing device 200), and N3805 type FNP (communication processing device 300)
, An Ethernet (LAN line 150) connected to the matrix line switching device 130, and an Ethernet (LAN line 160) connected to the matrix line switching device 130, and an N3805 type FNP (communication processing). Apparatus 10
0) and N3805 type FNP (communication processing device 200) and N
The 3805 type FNP (communication processing device 300) controls the matrix line switching device 120 and the matrix line switching device 130.

Each N3805 type FNP (communication processing device 100, communication processing device 200, communication processing device 300) has an IP address (133.206.7.1) for Ethernet (LAN line 150), and Ethernet (L
The IP address (133.20) for the AN line 160
6.7.2).

FIG. 9 is a flowchart showing the flow of the processing of the activation processing means of the N3805 type FNP (communication processing device 100). FIG. 10 is a flowchart showing the flow of processing of the activation processing means of the N3805 type FNP (communication processing device 200). FIG. 11 is a flowchart showing the flow of the processing of the activation means of the N3805 type FNP (communication processing device 300). FIG. 12 is a flowchart showing the processing flow of the connection request processing means of the N3805 type FNP (communication processing device 100). FIG. 13 shows an N3805 type F
It is a flowchart which shows the flow of a process of the connection request processing means of NP (communication processing apparatus 200).

FIG. 14 is a flowchart showing the flow of processing of the connection request processing means of the N3805 type FNP (communication processing device 300). FIG. 15 shows an N3805 type FNP.
It is a flowchart which shows the flow of a process of the switching request processing means of (communication processing apparatus 100). FIG.
It is a flowchart which shows the flow of a process of the 05 type FNP (communication processing apparatus 200) switching request processing means. FIG.
13 is a flowchart showing the flow of processing of a switching request processing means of the N3805 type FNP (communication processing device 300).

FIG. 18 is a diagram showing an example of the contents of the connection request FAP of the N3805 type FNP (communication processing device 100). FIG. 19 shows an N3805 type FNP (communication processing device 2).
00) is the connection request FAP. FIG.
Request FAP of type FNP (communication processing device 100)
It is. FIG. 21 is a switching request FAP of the N3805 type FNP (communication processing device 200). FIG.
This is a switching request FAP of the 805 type FNP (communication processing device 300).

Next, the operation of the second embodiment of the present invention will be described in detail with reference to FIGS.

N3805 type FNP (communication processing device 10
0) and the N3805 type FNP (communication processing device 200) are currently used, and the N3805 type FNP (communication processing device 300) is described as a backup.

N3805 type FNP (communication processing unit 10
0) is activated, the matrix switching device 130 is controlled according to the processing procedure of FIG.
(Communication processing device 100) and Ethernet (LAN line 1)
50) Disconnect the Ethernet (LAN line 160) (step 901).

Next, the matrix line switching device 120 is controlled to connect the N3805 type FNP (communication processing device 100) to the FDDI loop (LAN line 140) (step 902).

N3805 type FNP (communication processing unit 20
0) is also started, the matrix switching device 130 is controlled according to the processing procedure of FIG.
P (communication processing device 200) and Ethernet (LAN line 150 / Ethernet (LAN line 160)) are disconnected (step 1001).

Next, the matrix line switching device 120 is controlled to connect the N3805 type FNP (communication processing device 200) to the FDDI loop (LAN line 140) (step 1002).

N3805 type FNP (communication processing unit 30
0) is also started, the matrix switching device 130 is controlled in accordance with the processing procedure of FIG.
(Communication processing device 300) and Ethernet (LAN line 1)
50) Disconnect the Ethernet (LAN line 160) (step 1101).

Next, the matrix line switching device 120 is controlled to connect the N3805 type FNP (communication processing device 300) to the FDDI loop (LAN line 140) (step 1102).

Next, a connection request comes from the parallel ACOS 7800 (central information processing unit 110) to the N3805 type FNP (communication processing unit 100). FAP of connection request,
As shown in FIG. Referring to FIG. 18, this connection request includes information of a destination communication processing device name, a connection request line name, and a connection request line IP address. More specifically, a parallel ACOS 7800 (central information processing device 110) In the connection request from, the information that “N3805 type FNP (communication processing device 100) connects to Ethernet (LAN line 150)” and the IP address for Ethernet (LAN line 150) are (133.203.
7.1) is included. "

At this time, the N3805 type FNP (communication processing device 100) performs the following processing according to FIG.

A request from the parallel ACOS 7800 (central information processing unit 110) is transmitted via Ethernet (LAN line 1).
N3805 type FNP due to connection request for 50)
In the (communication processing device 100), the IP address for the Ethernet (LAN line 150) is set to (133.203.
After setting (7.1) (step 1202), the matrix line switching apparatus 130 is controlled to control Ethernet (L).
AN line 150) (step 1203).

Similarly, a connection request comes from the parallel ACOS 7800 (central information processing unit 110) to the N3805 type FNP (communication processing unit 200). FIG. 19 shows the FAP of the connection request in this case. Referring to FIG. 19, the connection request from the parallel ACOS 7800 (central information processing device 110) includes “N3805 type FNP (communication processing device 2
00) is connected to the Ethernet (LAN line 160). "And the IP address for" Ethernet (LAN line 160) are (133.203.
7.2) is included. "

At this time, the N3805 type FNP (communication processing device 200) performs the following processing according to FIG. Since the request from the parallel ACOS 7800 (the central information processing device 110) is a connection request for the Ethernet (LAN line 160), the N3805 type FNP (the communication processing device 20)
In (0), the IP address for the Ethernet (LAN line 160) is set to (133.203.7.2) (step 1304), and then the matrix line switching device 130 is controlled to control the Ethernet (LAN line 160).
Is connected (step 1305).

At this time, the Ethernet (LAN line 15
N3805 type FNP from 0) (communication processing device 100)
IP address is (133.203.7.1.)
The communication can be performed with the IP address of the N3805 type FNP (communication processing device 100) as (133.203.7.1).

Similarly, the Ethernet (LAN line 16
N3805 type FNP from 0) (communication processing device 200)
Is (133.203.7.2), and the IP address of the N3805 type FNP (communication processing device 200) is
Communication can be performed with the P address as (133.203.7.2).

From the Ethernet (LAN line 150), N3805 type FNP (communication processing device 200) and N3
It cannot be connected to the 805 type FNP (communication processing device 300).
0), the N3805 type FNP (communication processing device 10
0) and N3805 type FNP (communication processing device 300).

Next, the procedure for switching to the N3805 type FNP (communication processing device 300) due to the failure of the N3805 type FNP (communication processing device 100) will be described.

N3805 type FNP (communication processing device 10
The parallel ACOS 7800 (central information processing device 110) that has detected the failure 0) issues a switching instruction to the N3805 type FNP (communication processing device 300). The switching instruction FAP in this case is shown in FIG. The switching instruction request includes information on the destination communication processing device name, the failure communication processing device name, the connection line name, and the connection line IP address. More specifically, (a) “N3805 type FNP (communication processing device 100) became an obstacle ", (b)" N
3805 type FNP (communication processing device 100) was connected to Ethernet (LAN line 150) ", and
(C) “IP address for Ethernet (LAN line 150) of N3805 type FNP (communication processing device 100)” is included, and N3805 type FNP (communication processing device 300) performs the processing of FIG. 17 according to this information. Do.

First, the communication processing apparatus which has failed is N38.
Since the LAN line connected by the 05-type FNP (communication processing device 100) is an Ethernet (LAN line 150), N
An instruction to disconnect the 3805 type FNP (communication processing device 100) from the FDDI loop (LAN line 140) is issued (step 1702).

The N3805 type FNP (communication processing device 300) issues an instruction to the matrix line switching device 130 to disconnect the N3805 type FNP (communication processing device 100) and the Ethernet (LAN line 150) (step 1704).

Thereafter, the IP address of the N3805 type FNP (communication processing device 300) on the Ethernet (LAN line 150) is changed to the N3805 type FNP (communication processing device 1).
(00)) (133.203.7.1) (step 1705), and Ethernet (LAN line 150) for the matrix line switching device 130.
A connection request is made (step 1706).

Thus, the Ethernet (LAN line 1)
50) N3805 type FNP (communication processing unit 30
0) is (133.203.7.
1) N3805 type FNP (communication processing device 300)
Can be continued with the IP address of (133.203.7.1).

The N3805 type FNP (communication processing device 100) is in a state of being disconnected from both the FDDI loop (LAN line 140) and the Ethernet (LAN line 150), and can perform a fault recovery process.

N3805 type FNP (communication processing device 10
After performing the failure recovery process for 0), restart
The processing of FIG. 9 is performed.

The matrix line switching device 120 is controlled so that the N3805 type FNP (communication processing device 100) and the FD
A DI loop (LAN line 140) is connected (step 902). Thus, the N3805 type FNP (communication processing device 100) becomes a new standby device.

Next, in this state, the N3805 type FNP
When the (communication processing device 200) fails, the parallel ACOS 7800 (central information processing device 110)
A switching request is sent to the 05-type FNP (communication processing device 100). FIG. 14 shows the FAP of the switching request. Upon receiving the switching request, the N3805 type FNP (communication processing device 100) controls the matrix line switching device 120 according to the processing flow of FIG.
(Communication processing device 200) is disconnected from the FDDI loop (LAN line 140) (step 1502).

Next, the matrix line switching device 130 is controlled, and the Ethernet (LAN line 160) and N380
The type 5 FNP (communication processing device 200) is disconnected (step 1504). Thereafter, the IP address of the N3805 type FNP (communication processing device 300) is changed to (133.203.7.
2) (step 1505), and then N380
Type 5 FNP (communication processing device 100) and Ethernet (L
The AN line 160 is connected (step 1506).

Thus, the Ethernet (LAN line 1)
60) N3805 type FNP (communication processing device 10
0) is (133.203.7.
2) and the N3805 type FNP (communication processing device 10
The communication can be continued with the IP address of (0) being (133.203.7.2).

Further, the N3805 type FNP (communication processing device 200) is disconnected from both the FDDI loop (LAN line 140) and the Ethernet (LAN line 150), and can perform failure recovery processing. N380
After performing a failure recovery process on the type 5 FNP (communication processing device 200), the system is restarted and the process shown in FIG. 10 is performed.
N380 is controlled by controlling the matrix line switching device 120.
Connect the 5 type FNP (communication processing device 200) to the FDDI loop (LAN line 140) (step 100)
1). Thus, the N3805 type FNP (communication processing device 200) becomes a new standby device.

Further, if an N3805 type FNP (communication processing device 300) fails in this state, the parallel AC
OS3800 (central information processing unit 110) is N3805
A switching request is sent to the FNP (communication processing device 200). FIG. 21 shows the FAP of the switching request. The N3805 type FNP (communication processing device 200) receiving this switching request controls the matrix line switching device 120 according to the processing flow shown in FIG.
P (communication processing device 300) is disconnected from the FDDI loop (LAN line 140) (step 1610).

Next, the matrix line switching device is controlled to control Ethernet (LAN line 150) and N3805 type FN.
P (communication processing device 300) is disconnected (step 161)
2). After that, the N3805 type FNP (communication processing device 20
0) changes the IP address to (133.203.7.1) (step 1613), followed by N3805 type FN
P (communication processing device 200) and Ethernet (LAN line 150) are connected (step 1614).

Thus, the Ethernet (LAN line 1)
50) N3805 type FNP (communication processing unit 20
0) is (133.203.7.
1) and the N3805 type FNP (communication processing device 20
The communication can be continued by setting the IP address of (0) to (133.203.7.1).

[0099]

As described above, according to the present invention,
Since the standby device to be switched performs the switching control by itself, it is possible to eliminate the need for a switching control device when switching the network-connected device to the standby device.

Further, according to the present invention, the failed device is physically separated from the LAN line to prevent the failed device from affecting the LAN line. It is possible to prevent the LAN line from being adversely affected by a malfunction of the device or the like.

According to the present invention, there is an advantage that one standby communication processing device is required for a plurality of active communication processing devices in the standby switching of the devices connected to the network.

The reason for this is that, in the present invention, the content of the switching instruction from the central information processing device includes the faulty communication processing device identification information, the line continuation information of the faulty communication processing device, and the “IP for the line of the faulty communication processing device Including the address.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a system configuration according to an embodiment of the present invention.

FIG. 3 shows an N3805 type FNP in one embodiment of the present invention.
It is a flow chart which shows a flow of processing of starting processing means of (communication processing unit 20).

FIG. 4 shows an N3805 type FNP in one embodiment of the present invention.
It is a flow chart which shows a flow of processing of starting processing means of (communication processing unit 30).

FIG. 5 shows an N3805 type FNP in one embodiment of the present invention.
It is a flowchart which shows the flow of a process of the host request processing means of (communication processing apparatus 20).

FIG. 6 shows an N3805 type FNP in one embodiment of the present invention.
It is a flowchart which shows the flow of a process of the host request processing means of (communication processing apparatus 30).

FIG. 7 is a diagram illustrating a system configuration according to a second embodiment of the present invention.

FIG. 8 is a diagram showing a system configuration according to a second embodiment of the present invention.

FIG. 9 is a diagram for explaining the operation of the second embodiment of the present invention, and is an N3805 type FNP (communication processing device 100).
3 is a flowchart showing the flow of processing of the activation processing means.

FIG. 10 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 20).
It is a flowchart which shows the flow of a process of the starting processing means of 0).

FIG. 11 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 30).
It is a flowchart which shows the flow of a process of the starting processing means of 0).

FIG. 12 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 10);
It is a flowchart which shows the flow of a process of the connection request processing means of 0).

FIG. 13 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 20).
It is a flowchart which shows the flow of a process of the connection request processing means of 0).

FIG. 14 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 30).
It is a flowchart which shows the flow of a process of connection request processing means of 0).

FIG. 15 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 10).
It is a flowchart which shows the flow of a process of the switching request processing means of 0).

FIG. 16 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 20).
It is a flowchart which shows the flow of a process of the switching request processing means of 0).

FIG. 17 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 30).
It is a flowchart which shows the flow of a process of the switching request processing means of 0).

FIG. 18 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 10).
FIG. 11 is a diagram showing an example of the content of a connection request FAP of 0).

FIG. 19 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 20).
FIG. 11 is a diagram showing an example of the content of a connection request FAP of 0).

FIG. 20 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 10).
FIG. 11 is a diagram illustrating an example of the content of a switching request FAP of (0).

FIG. 21 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 20).
FIG. 11 is a diagram illustrating an example of the content of a switching request FAP of (0).

FIG. 22 is a diagram for explaining the operation of the second embodiment of the present invention, and illustrates an N3805 type FNP (communication processing device 30).
FIG. 11 is a diagram illustrating an example of the content of a switching request FAP of (0).

[Explanation of symbols]

10 Host computer (Parallel ACOS780
0) 20, 30 Communication processing device (N3805 type FNP) 40, 50, 60 Line switching device 70 LAN line (FDDI loop) 80 LAN line (Ethernet) 90 Information processing device (PC-98 personal computer) 100, 200, 300 IP Address 110 Central information processing device 120 Matrix line switching device 130 Matrix line switching device 140 LAN line 150 LAN line 160 LAN line

Claims (5)

[Claims] 1. A first computer system comprising: a host computer; and a first L through a line switching device.
A network comprising at least two communication processing devices connected by an AN line, and an information processing device connected by a second LAN line via a line switching device shared with the two communication processing devices. In the system, each of the two communication processing devices is configured to control each of the line switching devices, to dynamically change an IP address, and to store the information separately from the IP address of the communication processing device. Another IP address dedicated to communication with a processing device, and one of the two communication processing devices is used as an active system and the other is used as a standby system, between the host computer and each of the communication processing devices,
And performing communication between each of the communication processing devices and the information processing device by TCP / IP. When a failure of the communication processing device occurs, the spare communication processing device receives a notification from the host computer, Controlling the line switching device to physically disconnect the failed communication processing device from the first LAN line and the second LAN line, and switching the second LAN line to a spare communication processing device; A spare switching system for the communication processing device, further comprising: changing an IP address of the communication processing device visible from the information processing device after the switching to an IP address dedicated to communication with the information processing device. 2. A first computer system comprising: a host computer; and a first L via a line switching device and the host computer.
A network comprising at least two communication processing devices connected by an AN line, and an information processing device connected by a second LAN line via a line switching device shared with the two communication processing devices. In the system, one of the two communication processing devices is used as an active system and the other is used as a standby system, and when a failure occurs in the communication processing device, the standby communication processing device receives a notification from the host computer and receives a notification from the host computer. A switching system for a communication processing device, characterized by controlling switching of the communication processing device. 3. An IP address dedicated to communication with the information processing apparatus, separately from an IP address for the second LAN line, which the two communication processing apparatuses have, respectively. When the communication processing device fails, the spare communication processing device controls each of the line switching devices to switch the failed communication processing device to the first LAN line and the second L
Physical disconnection from the AN line and the second L
The AN line is switched to a spare communication processing device, and after the switching, the I
3. The system according to claim 2, wherein the P address is changed to an IP address dedicated to communication with the information processing apparatus. 4. A plurality of communication processing devices connected to a central information processing device via a LAN line via a matrix line switching device, and a LAN line via a matrix line switching device shared by the plurality of communication processing devices. In the network system connected to the system, when the active communication processing device fails, the central information processing device sends a fault communication processing device name, a fault communication processing device connection line name, a fault communication process to the standby communication processing device. A notification including a device connection line address is performed, and the standby communication processing device controls the matrix line switching device to switch the LAN line on the active communication processing device side that has failed to the standby communication processing device, The standby switching is realized by one standby communication processing device for the plurality of active communication processing devices. Preliminary switching system of the communication processing apparatus. 5. A first matrix line switching device, and a first LAN which shares the first matrix line switching device and is connected via the first matrix line switching device.
A plurality of communication processing devices connected to a line, a host computer connected to the first LAN line, and a second matrix line switching device, wherein the plurality of communication processing devices switch the second matrix line. A device is shared and connected to one or a plurality of second LAN lines different from the first LAN line via the second matrix line switching device, and functions as an active system among the plurality of communication processing devices. When a failure is detected in the communication processing device that is operating, the host computer determines that a failure has occurred in the communication processing device that is currently functioning as a standby system (hereinafter referred to as a “standby communication processing device”) among the plurality of communication processing devices. Identification information of the detected communication processing device (referred to as “failed communication processing device”), LAN line information to which the failed communication processing device was connected, and the failed communication process The standby communication processing device that has received the notification from the host computer controls the faulty communication processing device to control the first and second matrix line switching devices. The first
Disconnection from the LAN line and the second LAN line, and the standby communication processing device sets its own address on the second LAN line to the failure communication processing device on the second LAN line. To the second LAN via the second matrix line switching device.
The fault communication processing device is connected to the first LAN line via the first matrix line switching device after recovery from the fault, and is connected to the standby system communication line. A standby switching system for a communication processing device, wherein the communication processing device is on standby as a processing device.