JPH0254640A - Line switching controller - Google Patents

Abstract

PURPOSE:To save time and cost required for the recovery of a data line by switching a normal data line into a backup data line automatically when the data line is interrupted. CONSTITUTION:When the usual data line 30 is interrupted due to the fault of a transmission path, a line interruption detection circuit 11 of a computer 10 detects the interruption state of the usual data line 30, the computer 10 extracts a data for line switching connection from a data base 12 automatically and sends it to a line switching connection 14, which is driven. The line switching connection 14 release the connection between the computer 10 and the usual data line 30 and connects the computer 10 and the backup data line 40. On the other hand, a computer 20 is switched to the backup data line 40 similarly in the case of the computer 10. Thus, the data line of the computer system is recovered in such a manner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line switching control device for a computer system in which a plurality of computers are connected via a data line, and in particular to a line switching control device for a computer system in which a plurality of computers are connected via a data line. The present invention relates to a line switching control device for switching to a line.

Conventional technology] Conventionally, when a data line is disconnected, the following measures are taken. In other words, the operators in charge of each computer communicate with each other to determine a new backup data line, and then manually
Switching from a broken normal data line to a backup data line.

``Problem to be Solved by the Invention J'' In the conventional method described above, the operator had to decide on a new backup data line and then manually switch to the backup data line. The disadvantage is that it requires a lot of time and effort.

An object of the present invention is to provide a device that can automatically switch to a backup data line in a short time when the data line of a computer system is disconnected.

[Means for Solving the Problem] In order to achieve the above object, line switching control I according to the present invention
The device has the following features. In other words, in a line switching control device for a computer system in which multiple computers are connected via a data line, the database section that stores data for switching from a normal data line to a backup data line, and when the normal data line is disconnected. The present invention is characterized by comprising: a line disconnection detection circuit that detects a line disconnection; and a line switching connection unit that automatically switches a normal data line to a backup 79 line using data stored in the database.

[Function] In the line switching control device according to the present invention, a backup data line is prepared in advance in case the normal data line is disconnected. When the normal data line goes out, it automatically switches to the backup data line. Therefore, the time required to restore the data line is shorter than with conventional methods.

[Example] Next, the present invention will be described in detail with reference to the drawings.

The drawing is a block diagram of one embodiment of the present invention.

In the computer system shown in this figure, two computers 10.20 are connected by a normal data line 30 and a backup data line 40. This computer system basically includes a database section 12.
22, line switching connection section 14.24, and console 16
．． 26 are included. Also, each computer 10.
20 are provided with line disconnection detection circuits 11 and 21, respectively.

Next, the connection relationship between each part of this computer system will be explained. A database section 12 and a line switching connection section 14 are connected to the computer 10 . Similarly, a database section 22 and a line switching connection section 24 are connected to the other computer 20. The two computers 10 and 20 are connected to the two line switching connection units 14.
and 24, and are connected by one normal data line 30. Then, the line switching connection section 14 and the line switching connection section 2
Furthermore, there is a backup data line 40 between
are tied. In addition, each line switching connection section 14
．． A console 16.26 is connected to 24.

Next, the operation of each part of the computer system of the embodiment will be explained. Data for line switching is stored in the database section 12.22, and this data is sent to the computer 10.20 as needed. In the line switching connection section 14.24, switching between the normal data line 30 and the backup data line 40 is automatically performed according to instructions from the computer 10.20. In addition, if you want to switch the line manually, such as when the line cannot be switched automatically for some reason, operate the console 16.26 to send the line switching command to the line switching connection section 14.24. The command can be executed.

Next, a line recovery operation when the normal data line 30 is disconnected will be explained. When the normal data line 30 becomes disconnected due to a failure in the transmission path, etc., the line disconnection detection circuit 11 of the computer 10 detects that the normal data line 30 is disconnected because data communication is no longer possible. In response to this, the computer 10 automatically extracts line switching connection data from the database 12, sends it to the line switching connection section 14, and drives the line switching connection section 14. Then, the line switching connection unit 14 disconnects the computer 10 from the normal data line 30 and connects the computer 10 to the backup data line 40. On the other hand, the computer 20 is also switched to the backup data line 40 in the same way as the computer 10.

In this way, the computer system's data line is restored.

As described above, data line recovery is performed automatically and instantaneously, so the time required for data line recovery is shorter than with conventional methods. Furthermore, damage caused by the computer system not being available until the data line is restored can be avoided.

In the above embodiment, there is one backup data line, but there may be two or more. In this case, even if the first backup data line is disconnected following the normal data line, the second and subsequent Computer systems can be recovered by using backup data lines. This greatly improves the reliability and safety of the computer system.

[Effects of the Invention] As explained above, the present invention can automatically and instantly switch the pig line to a backup data line to recover the data line when the normal data line in the computer system is disconnected. The time and cost required for line restoration can be saved, and the reliability and safety of the computer system can be improved.

[Brief explanation of the drawing]

The drawing is a block diagram of one embodiment of the present invention. 10.20...Computer 11.21... Line disconnection detection circuit 12.22...Database section 14.24...Line switching connection section 30... Normal data line 40...Backup data line Patent applicant: NEC Corporation Representative Patent Attorney Toshiyuki Meiki

Claims (1)

[Claims] In a line switching control device for a computer system in which a plurality of computers are connected via data lines, there is a database unit storing data for switching a normal data line to a backup data line, and a database unit that stores data for switching a normal data line to a backup data line; A line comprising: a line disconnection detection circuit for detecting a disconnection; and a line switching connection section for automatically switching a normal data line to a backup data line using data stored in the database. Switching control device.