JPH04342332A - Transmission system path switching control system - Google Patents

Abstract

PURPOSE:To realize non-stop onlined work and to improve onlined work efficiency by automatically switching a transmission path to a normal system transmission path when a fault is generated at the transmission path. CONSTITUTION:At computer network systems mutually connected by a local area network connector A, a host computer and a terminal computer B are equipped with communication switching control parts 1 and 51 having communication control means 2 and 52, fault monitor means 3 and 53, path switching means 4 and 54 and path switching tables 5 and 55 and when the path fault is generated at a certain transmission path, it is switched to the other system transmission path according to the contents of the fault.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission route switching control system in a local EL network.

0002

[Background Art] Conventionally, when a path failure occurs in a transmission path between mutually connected computer systems,
It is necessary to either remove the path failure in the transmission system and restart online operations after recovery, or manually switch to another system's transmission path and restart online operations after the switching is complete.

0003

[Problems to be Solved by the Invention] The above-mentioned conventional online business restart recovery procedure when a transmission path failure occurs requires constant failure monitoring, and there is a risk that online business may be stopped for a long time depending on the nature of the failure. However, there are drawbacks that lead to a decrease in efficiency in terms of management efficiency and business operation efficiency.

0004

[Means for Solving the Problems] The transmission system route switching control method of the present invention provides a computer network system in which a host computer and a terminal computer are connected to each other by a local area network connection device, and a communication control means and a fault monitoring means. It has a communication switching control unit including a route switching means and a route switching table, and is characterized in that when a route failure occurs in a certain transmission route, the transmission route is switched to another system depending on the content of the failure.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram of an embodiment of the present invention. In the figure, 1 and 51 are communication switching control units in the host computer and terminal computer, 2 and 52 are communication control means, 3 and 53 are fault monitoring means, and 4 and 54 are route switching units. Means 5 and 55 likewise represent auxiliary storage devices containing route switching tables.

FIG. 2 is an explanatory diagram showing a data route at the time of switching in the above transmission system route switching control system. Referring to the figure, when a route failure occurs in route 1, the route switching data route transition is performed by the communication switching control unit 1 in the form of a host computer, and the I/O data route is transferred to another system. Switch. At the same time, the station address for the host computer is switched in the communication switching control unit 51 on the terminal computer, and the data route is changed to route 1.
Switch processing is performed from route 2 to route 2.

FIG. 3 is an explanatory diagram showing the operation of the above transmission system route switching control method. When a route failure occurs on route 1 (broken line) in regular operation, the communication control means 2 detects the failure as a process on the host side, and notifies the failure monitoring means 3 of the failure. Fault monitoring means 3 shows fault notification content (error code)
is checked, and in the case of a predetermined specific error code that cannot be immediately restored, a route switching request is made to the route switching means 4.

The route switching means 4 uses a host side route switching table (see FIG. 4(a)) stored in the auxiliary storage device 5.
, obtain the alternative operational I/O port address and alternative local station address corresponding to the fault route,
A request is made to the communication control means 2 to set an alternative route, and the data route on the host side is switched from route 1 to route 2.

At the same time, processing on the terminal side is performed. First, the communication control means 52 detects a fault and notifies the fault monitoring means 53 of the fault, similar to the processing on the host side. The fault monitoring means 53 checks the content of the fault notification (error code), and requests the route switching means 54 to switch the route in the case of a specific error code.

The route switching means 54 stores the terminal side route switching table (FIG. 4) held in the auxiliary storage device 55 shown in FIG.
(b)), obtains the alternative destination station address corresponding to the failed route, requests the communication control means 52 to set an alternative route, and switches the data route for the host from route 1 to route 2. .

[0012] After the route switching process on the host side and the terminal side is performed as described above, a data link between them is established. Therefore, online data transfer can be realized using other routes without stopping online operations.

[0013]

As described above, the present invention has the effect of automatically switching to a normal transmission path when a transmission path failure occurs, thereby making it possible to realize non-stop online operations and improving the efficiency of online operations.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a route switching data route.

FIG. 3 is an explanatory diagram showing a route switching operation.

FIGS. 4(a) and 4(b) are explanatory diagrams showing examples of route switching tables.

[Explanation of symbols]

1,51 Communication switching control section 2,52 Communication control means 3,53 Fault monitoring means 4,54 Route switching means 5,55 Auxiliary storage device

Claims (1)

[Claims] Claim 1: In a computer network system interconnected by a local area network connection device, a host computer and a terminal computer have a communication switching control section comprising communication control means, fault monitoring means, route switching means, and a route switching table. A transmission system route switching control method characterized in that, when a route failure occurs in a certain transmission route, the transmission route is switched to another system depending on the nature of the failure.