JPH044642A - Redundancy constitution control system - Google Patents

Abstract

PURPOSE:To miniaturize the information processing system having a redundancy constitution by connecting an active system communication controller and a standby system communication controller having the same ISDN network access address to an S point interface of the CCITT recommendations I.411 so as to control the use/inhibit of the ISDN network access address. CONSTITUTION:An active system communication controller 103 and a standby system communication controller 104 have a same ISDN network access address with respect to an ISDN network 200. Since a command of reply inhibit to the ISDN network access address is implemented by the standby system communication controller 108 by using an ISDN network access address use inhibit signal from a normal operation monitor circuit 106 in a standby system CPU 102 or a normal operation monitor circuit 105 in an active system CPU 101, only the active system always reply with the communication by using the ISDN network access address from the other information processing system connecting to the ISDN network 200.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a redundant configuration control method for an information processing system.
In particular, the present invention relates to a redundant configuration control method for controlling switching to a redundant configuration of a communication system in an information processing system.

[Conventional technology]

Conventionally, in this type of redundant configuration control method, as shown in Figure 2, the active system (active CPU (Central P
processing unit) and active communication control bag W) and the standby system (standby CPU and standby communication control unit) are connected to the data network (DDX
(DigitalData eXchange) network,
Public telephone network or ISDN (Integrated
5service Digital Network
k) network, etc.), and only the active system was connected to the data network by manually switching the changeover switch or by switching the changeover switch based on a switching instruction from the active system.

[Problem to be solved by the invention]

The conventional redundant configuration control method described above requires a physical changeover switch, and in order to automatically change over the changeover switch, an interface is required to issue a changeover instruction, making the redundancy configuration complicated and large-scale. It has the disadvantage of becoming.

In view of the above-mentioned points, an object of the present invention is to enable switching between an active system and a standby system without the need for a physical changeover switch, to simplify the control of a redundant configuration, and to provide an information processing system with a redundant configuration. The object of the present invention is to provide a redundant configuration control method that can reduce the size of the system.

[Means to solve the problem]

The redundant configuration control method of the present invention is a CCIT that connects an active communication control device and a standby communication control device in an information processing system with a redundant configuration connected to an ISDN network.
T Recommendation I. 411 8-point interface and the same I/O for the active communication control device and the standby communication control device
The same IS is used to assign the SDN network access address.
Address information storage circuits in the active system and standby system that store DN network access addresses, monitor whether the operation of the active system is normal or not, and if an abnormality is found, provide ISDN network access to the conventional active system communication control device. ISDN'l issues an address use prohibition signal to the conventional standby communication control device.
Standby system C that issues the access address usage prohibition release signal
and a normal operation monitoring circuit within the PU.

[Effect]

In the redundant configuration control method of the present invention, CCITT Recommendation I. 4
11 8-point interface connects the active communication control device and the standby communication control device, and the address information storage circuits in the active and standby systems provide the same ISDNM4 access address to the active communication control device and the standby communication control device. The normal operation monitoring circuit in the standby CPU monitors whether the operation of the active system is normal or not, and if an abnormality is detected, the conventional active communication control device Issues an ISDN network access address use prohibition signal to the conventional standby communication control device.
Issues an Nki4 access address usage prohibition release signal.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the redundant configuration control method of the present invention. The redundant configuration control method of this embodiment uses an information processing system 100 having a redundant configuration and a CCI
TT (International Telegraph)
aph and Te1ephone Con5
ultimate C.

mm1ttee, International Telegraph and Telephone Advisory Committee) Recommendation I. 4
The system includes an 8-point interface (hereinafter simply referred to as 8-point interface) 120, an ISDN m 200, and an information processing system (including a terminal) 300 with which the information processing system 100 communicates. Note that communication between the information processing system 100 and the information processing system 300 uses the 8-point interface 120 and ISDN!
li! A communication path 201 is formed on 200.

The information processing system 100 has an operational system (operational CPUI
It has a redundant configuration consisting of a standby system (standby CPU 102 and standby communication control unit 104) (the active system and the standby system are switchable; (The name refers to a specific point in time.)

The active CPU 01 includes a normal operation monitoring circuit 105, and the standby CPU 102 includes a normal operation monitoring circuit 106.
Contains.

The active communication control device 103 includes a communication control circuit 107 and an address information storage circuit 109, and the standby communication control device 104 includes a communication control circuit 108 and an address information storage circuit 110.

Next, the operation of the redundant configuration control system of this embodiment configured as described above will be explained.

Information processing system 100 communicates with information processing system 300 via communication bus 201 .

Here, the active communication control bag W103 and the standby communication control device 104 are connected to the same ■SD for the ISDN network 200.
It has an Nw4 access address. That is, the address information storage circuit 109 in the active communication control device 103
rsDN network access address registered in , and the address information storage circuit 110 in the standby communication control device 104
This is the same as the ISDN network access address registered in . However, the instruction to prohibit responses to the ISDN\LH access address by the ISDNm access address use prohibition signal from the normal operation monitoring circuit 105 in the active CPUI OI or the normal operation monitoring circuit 106 in the standby CPU 102 does not control communication on the standby side. Since the circuit 107 or 108 is connected to the other information processing system (information processing system 3) connected to the ISDN network 200,
Only the active system always responds to communications using the above-mentioned ISDN network access address (including 00).

Now, in the information processing system 100, the standby CP
The normal operation monitoring circuit 106 in U102 monitors and confirms the normality of the active system (when the active system and standby system are switched, the active system CPUI 01 (at that point, it is the standby system CPU) (The normal operation monitoring circuit 105 inside operates).

If the normal operation monitoring circuit 106 discovers an abnormality in the active system during this check, the system connected to the information processing system 300 via the communication path 201 is switched from the conventional active system to the conventional standby system.

At the same time, the normal operation monitoring circuit 106 sends an ISDN network access address use prohibition signal to the operational communication control device 1.
Issued to the communication control circuit 107 in 03 (conventional active communication control device).

Furthermore, the normal operation monitoring circuit 106 in the standby CPU 102, which has newly become the active side, sends an ISDN network access address use prohibition release signal to the standby communication control device 104 (the new active communication control device, which is the conventional standby It is issued to the communication control circuit 108 in the system communication control bag W).

With this ISDNy4 access address use prohibition release signal, the standby communication control device 104, which has newly become the active communication control device, connects the three-point interface 120 and I5.
Communication with the information processing system 300 via the DNSli 1200 is performed by the communication control circuit 108. Note that this communication is performed based on the ISDN network access address registered in the preliminary address information storage circuit 110.

In this case, the active communication control device 103, which has become a standby communication control device, prohibits responses to communications from other information processing systems connected to the ISDN network 200 by the above-mentioned ISDN network access address use prohibition signal. be done.

In this way, the information processing system 100 always communicates with the information processing system 300 and the like only through the active system.

〔Effect of the invention〕

As explained above, the present invention is based on CCITT Recommendation I. 41
By connecting the active communication control device and the standby communication control device with the same ISDN network access address to the 8-point interface of 1, and controlling the use/prohibition of the ISDN network access address by the normal operation monitoring circuit, physical The effect is that it becomes possible to switch between the active system and the standby system without the need for a switch, simplifying the control of redundant configurations, and making it possible to downsize information processing systems with redundant configurations. There is.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of an example of a conventional redundant configuration control method. In the figure, 100.300 Information processing system, 101... Active system CPU, 102... Standby system CPU, 103... Active system communication control device, 104...
・Standby communication control device, 105.106・Normal operation monitoring circuit, 107.108・Communication control circuit, 109.110・Address information storage circuit, 120...
... 8-point interface, 200 ... ISDN network, 201 ... communication path.

Claims (1)

[Claims] In an information processing system with a redundant configuration connected to an ISDN network, CCITT Recommendation I. 411 S point interface, and address information in the active system and standby system that stores the same ISDN network access address in order to give the same ISDN network access address to the active system communication control device and the standby system communication control device. It monitors whether the operation of the storage circuit and the active system is normal or not, and if an abnormality is found, it issues an ISDN network access address use prohibition signal to the conventional active system communication control device, and then issues an ISDN network access address use prohibition signal to the conventional active system communication control device. 1. A redundant configuration control system comprising: a normal operation monitoring circuit in a standby CPU that issues an ISDN network access address prohibition release signal.