JP3428260B2 - Line switching control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line switching control device for controlling line switching when a failure occurs in a line network. The present invention particularly ranks various faults occurring in a circuit network, registers in advance a series of a plurality of line switching processes to be performed when the faults occur, and detects the occurrence of the corresponding fault. The present invention relates to a line switching control device capable of executing a plurality of line switching processes registered as a trigger at one time.

[0002]

2. Description of the Related Art In recent years, the high reliability of a large-scale communication system has been emphasized as the use of the line network expands and the line network becomes complicated. Therefore, for stable operation of the entire communication system including the line network, for example, a line switch is provided for switching the line when a failure occurs in a part of the line network.

FIG. 44 shows a conventional line switch and a control device (console) for controlling the line switch. In FIG. 44, the host computer 103 is connected to the line network 100 via the line switch A 101, and the terminal 10 is connected via the line switch B 102.
4 is connected. When the line network 100 is normal, communication is performed between the host computer 103 and the terminal 104 via the line switching devices 101 and 102. On the other hand, the line network 100 is also connected with a console 105 for controlling the whole line network 100.

In the communication system configured as described above, when a fault occurs on the line between the host computer 103 and the terminal 104, the console 105 receives the fault alarm. The console 105 determines the channel of the line switch to be switched based on the received alarm. And first, the line switch A10
A line switching command is transmitted to the line 1 (see FIG. 45), and then a line switching command is transmitted to the line switching device A2 (see FIG. 46).

[0005]

As described above, when performing line switching by the conventional line switching control device, the operator is conscious of the line switching device and the channel to be switched one by one, and specifies them. Had to do. However,
Along with the complexity of the line network, the number of patterns for line switching is increasing, and in some cases it is necessary to switch channels by a large number of line switching devices to perform one line switching. Therefore, the line switching operation becomes complicated, and the operator is required to have special knowledge about the structure of the line network. This is the main problem in the past. Hereinafter, this main problem will be described in more detail by dividing it into specific problems. (First Specific Problem) The current circuit network composed of a computer and communication devices is composed of a large number of devices combined, and if an abnormality occurs somewhere in the composed devices, Other abnormalities are often caused by the abnormality. As shown in FIG. 44, the console 105
In a communication system that performs centralized monitoring of a circuit network, a large number of abnormalities may be notified due to one abnormality. In that case, it is necessary to investigate the root cause (the cause of many abnormalities) based on the notified many abnormalities. However, such work largely depends on the skill of the operator. This is the first specific problem in the prior art. (Second Specific Problem) Further, for example, as a basic network, in a communication system in which computer systems of a host, a server, and a client are in a long distance and are connected by a communication device such as a modem, the server fails. Therefore, when switching to another server, it is necessary to switch the line between the host and the server and the line between the server and the client. When this is done, it is necessary to switch the connection destinations of the host-side modem and the server-side modem between the host and the server, and the server-side modem and the client-side modem between the server and the client, respectively. In this way, switching the connection destination for multiple devices is a very complicated operation,
I cannot respond quickly. And online work will be down until the line switching is completed,
The social impact of it is great. This is the second specific problem in the prior art. (Third specific problem) In addition, since the current circuit network composed of computers and communication devices is configured by combining various types of devices, an abnormality may occur somewhere in the configured devices. When it occurs, the coping method differs for each abnormality. Therefore, when an abnormality occurs, it is not possible to make a backup suitable for each type of abnormality by simply performing a simple switching. This is the third specific problem in the prior art. (Fourth Specific Problem) Further, in a network including a computer and a communication device, an abnormality that occurs in the network includes a trouble of a computer other than the communication device. Therefore, if the computer trouble is not monitored in parallel with the communication trouble, it is impossible to accurately pursue the abnormality. This is the fourth specific problem in the prior art. (Fifth Specific Problem) Further, an abnormality that occurs in a network formed by a computer and a communication device may be regarded as normal due to the operation of the communication system. For example, this is the case where the terminal is not powered on. Monitoring by the console in the communication system shown in FIG. 44 cannot distinguish between an abnormality that does not correspond to such a failure and an abnormality that corresponds to a failure such as disconnection of a communication line. This is the fifth specific problem.

In view of the above first specific problem, the first object of the present invention is to identify an abnormality that is the root cause of another abnormality from among a plurality of abnormalities, and then avoid this abnormality. It is an object of the present invention to provide a line switching control device capable of performing line switching for the purpose.

A second object of the present invention is, in view of the second specific problem described above, a line switching control capable of performing a complicated line switching operation without special knowledge about the structure of a line network. The device is to provide.

A third object of the present invention is to provide a line switching control device capable of automatically performing a backup suitable for the type of abnormality in view of the third specific problem.

A fourth object of the present invention is to provide a line switching control device capable of monitoring an abnormality of a device other than a communication device in view of the fourth specific problem.
A fifth object of the present invention is, in view of the fifth specific problem, to provide a line switching control device capable of preventing concentration of alarms for abnormalities that can be regarded as normal during operation.

[0010]

Means for Solving the Problems That is, the first time of the present invention
In order to solve the above-mentioned first problem , the line switching control device has a plurality of switching devices (2) as shown in the principle diagram of FIG.
00), which is a line switching control device for switching lines set up between a plurality of terminals (202) in a line network (201), and has the highest importance among failures that occur simultaneously on the line. An important failure specifying means (203) for specifying a high failure and this important failure specifying means (2)
Switching device specifying means (204) for specifying the switching device on the line for switching the line so as to avoid the failure specified by (03) and the switching device specifying means (204).
A switching instruction means (205) for instructing the switching device (200) specified by the above to switch the line. With this line switching control device
Then, the important fault identifying means (203) identifies the fault having the highest importance among the faults that have occurred simultaneously on the line. The switching device specifying means (204) specifies a switching device on this line that can switch the line route so as to avoid the failure specified by the important failure specifying means (203). A switching instruction means (205) instructs the switching device (200) specified by the switching device specifying means (204) to switch the line. As a result, the lines are switched so as to avoid the failure that is the root cause of each failure.

A second line switching control device of the present invention
Means that the important fault identifying means has the importance ranking information in which the ranking of the importance is given in advance for each type of the fault, and the most important one among the respective faults simultaneously occurring on the line in the importance ranking information. It is specified by identifying a fault having a high importance rank as the fault having the highest importance. In this way, the important failure identifying means can easily identify the failure with the highest importance, and rewrite the importance order information in advance to determine that any kind of failure has a high importance. Can be treated.

Further, a third line switching control device of the present invention
The switching device specifying means displays the device name of the switching device on the line that switches the line so as to avoid the failure specified by the important failure specifying means, and the device name on the display means. By having an input means for inputting information instructing switching of the displayed switching device,
It has been specified. By doing so, it is possible to ultimately leave the operator's judgment as to which switching device is actually switched.

Further, a fourth line switching control device of the present invention
In order to solve the above-mentioned second problem, the switching device identification
The means specifies all the switching devices on the line that are necessary for avoiding the failure specified by the important failure specifying means. By doing so, even if a failure occurs on a complicated route that passes through a plurality of switching devices, the line can be easily switched.

Further, a fifth line switching control device of the present invention
In order to solve the above-mentioned third problem, the switching device identification
The means has a table in which the failure that occurs and the device names of all the switching devices that should be switched to avoid this failure are associated in advance, and it corresponds to the failure identified by the important failure identification means. It is specified by reading the device name of the switching device to be switched from this table. This makes it easy to identify the switching device by the switching device identification means.

Further, a sixth line switching control device of the present invention
In order to solve the fourth problem mentioned above, each of the network
The switching device specifies the failure of itself and the failure of the terminal connected to itself by notifying the important failure specifying means. In this way, if there is a root cause of the failure in a device outside the network, it is possible to investigate the root cause.

Further, a seventh line switching control device of the present invention
In order to solve the above-mentioned fifth problem ,
Of each of the switching devices masks the notification to the important failure specifying means of some of the failures of the terminals connected to the switching apparatus . By doing so, it is possible to reduce the load due to the concentration of alarms on the important fault identifying means.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[0018]

First Embodiment <Overall Configuration of Communication System> FIG. 2 is a block diagram showing a schematic configuration of a communication system according to the first embodiment of the present invention. In FIG. 2, this communication system includes a line network 1.
And a switching device A2, a switching device B3 and a console 6 connected to the line network 1, a host computer 4 connected to the switching device A2 and a terminal 5 connected to the switching device B3. There is. The line network 1 also includes a large number of other switching devices (not shown), each of which is connected to a host computer, a server, a terminal or the like. [Switching device] Each of the line switching devices 2 and 3 is a device that switches a line and detects an abnormality of itself and a terminal connected to the line and notifies the console 6 of an alarm. Examples of this alarm include “terminal down”, “terminal power off”, “terminal no response”, “line error”, “switching device error”, and “switching device power off” in descending order of priority. “Terminal down” is an alarm of the highest importance among detection failures, and is an abnormality in software or hardware of the terminal. When this alarm occurs, the host line error, client line error, and no terminal response occur simultaneously. What is "terminal power off"?
It is the second most important alarm among detection failures,
This is due to an error in the terminal hardware (power supply unit), a power failure in the terminal, or the like. When this alarm occurs, a host line error, client line error, and no terminal response may occur simultaneously. “No response from the terminal” means 3 out of the detection failures.
This is the second most important alarm, and is the alarm when the terminal hangs due to an abnormality. When this alarm occurs, a line error with the host and a line error with the client may occur simultaneously. The "line abnormality" is an alarm when an abnormality of the communication line is detected, and in the case of a host line, an abnormality of the terminal line may occur together. The "switching device error" is an error in the hardware of the switching device. When this alarm occurs, it has no effect on the communication line. "Switching device power off" is an alarm in the case of powering off the switching device due to normal operation or malfunction of the operator.

As shown in FIG. 3, the switching devices 2 and 3 include a backup line monitoring mechanism 21 and a self-hardware monitoring mechanism 2.
2, a line monitoring mechanism 23, a terminal life-and-death monitoring mechanism 24, a terminal power supply monitoring mechanism 25, and a terminal down monitoring mechanism 26.

The line monitoring mechanism 23, as shown in FIG.
Terminal host line and terminal line communication signals (CD, D
The state change (ON / OFF) of R, CS, SQD) is monitored (S001). Then, when the abnormality of the state change designated in advance is detected, the detection result is notified to the console notification mechanism 27 (S002).

The terminal life-and-death monitoring mechanism 24 constantly polls the terminal life-and-death monitoring mechanism 32 on the terminal side. Then, as shown in FIG. 5, the terminal life and death monitoring mechanism 32 on the terminal side.
The hard error and the soft error of the terminal detected by are detected (S011). Further, the non-response of polling from the terminal is detected (S012). When these are detected, the detection result is notified to the console notification mechanism 27 (S013).

The terminal power supply monitoring mechanism 25 cooperates with the terminal power supply monitoring mechanism 33 on the terminal side to monitor the power supply state (instantaneous interruption, etc.) of the terminal 5 (4). Then, as shown in FIG. 6, when the terminal power supply monitoring mechanism 33 on the terminal side detects the occurrence of an abnormality, this is received (S021), and the console notification mechanism 27 is received.
(S022).

The terminal down monitoring mechanism 26 cooperates with the terminal down monitoring mechanism 34 on the terminal side to monitor the abnormality of the software and hardware of the terminal 5 (4) based on ON / OFF of the terminal down monitoring signal. Then, as shown in FIG. 7, when the terminal down monitoring signal is ON (S03
1) Notify the console notification mechanism 27 (S03)
2).

As shown in FIG. 8, the backup line monitoring mechanism 21 monitors the carrier signal of the backup line (S041), and when it detects an abnormality exceeding a preset range, it notifies the console notification mechanism 27. (S0
42).

As shown in FIG. 9, the self-hardware monitoring mechanism 22 monitors the self-hardware of the switching devices 2 and 3 during the start-up process and during startup (S051), and when a parity bit abnormality of the memory is detected, The console notification mechanism 27 is notified (S052).

As shown in FIG. 10, the console notification mechanism 27 receives the information on the failure detected by each of the failure detection mechanisms 21 to 26 (S061) and notifies it to the console 6 in a packet procedure (S062). ). [Terminal (Host Computer)] As shown in FIG. 3, the terminal 5 includes a line mechanism 31, a terminal life / death monitoring mechanism 32, a terminal power supply monitoring mechanism 33, and a terminal down monitoring mechanism 34. The host computer 4 is provided with only the line mechanism 31 among these components.

The line mechanism 31 of the terminal 5 is a mechanism for communicating with the host 4 or another terminal 5, as shown in FIG. The line mechanism 31 of the host 4 is a mechanism for communicating with the terminal.

The terminal life-and-death monitoring mechanism 32 includes switching devices 2 and 3.
In cooperation with the terminal life-and-death monitoring mechanism 24, as shown in FIG. 12, the abnormal state storage file (not shown) of the terminal 4 is searched,
If there is an abnormal state (S081), the switching devices 2, 3
The terminal life-and-death monitoring mechanism 24 is notified (S082). The polling response from the terminal life-and-death monitoring mechanism 24 of the switching devices 2 and 3 is notified to the terminal life-and-death monitoring mechanism 24 (S083).

The terminal power supply monitoring mechanism 33 monitors the power supply device (not shown) of the terminal 4. Then, as shown in FIG.
When the power supply abnormality is detected (S091), the terminal power supply monitoring mechanism 25 of the switching devices 2 and 3 is notified (S09).
2).

The terminal down monitoring mechanism 34 includes the switching device 2,
In cooperation with the terminal down monitoring mechanism 26 of No. 3, as shown in FIG. 14, a software failure and a hardware failure detected by the software of the terminal 4 are detected (S101), and the terminal down monitoring signal is turned ON to switch. Device 2,
The terminal down monitoring mechanism 26 of No. 3 is notified (S10).
2).

The switching devices 2 and 3 and the terminal 5 described above
Depending on the configuration of the (host computer 4), software failure of devices on the network, hardware failure,
And the line failure can be detected in detail. [Console] On the other hand, the console 6 as a line switching control device is a device for controlling channel switching of the switching devices 2 and 3. The console 6 includes an input unit 11 for receiving information input by an operator, a registration processing unit 12 connected to the input unit 11, an alarm rank registration table 13 in which data is written by the registration processing unit 12,
A switching pattern determination unit 1 that is connected to the switching device table 14, the backup definition file 15, and the alarm analysis unit 16 that reads the alarm order registration table 13 and the input unit 11 and that also reads the switching device table 14
7. A switching instruction unit 18 connected to the switching pattern determination unit 17 and reading the backup definition file 15, and a display connected to the alarm analysis unit 16, the switching pattern determination unit 17, and the switching instruction unit 18. It is composed of a part 19.

The input section 11 serving as an input means includes information for selecting a switching device by an operator and various information shown in FIG. 2 ((a) alarm ranking information, (b) alarm-pattern correspondence information, (c) ) Switching pattern information) D is input. This "alarm ranking information" is a priority when alarms that can be detected in the network are simultaneously detected. As this "alarm ranking information", the order of "terminal down", "terminal power supply error", "terminal no response", "line error", "switching device error", and "switching device power off" as described above. May be used, or any other order may be used. The “alarm / pattern correspondence information” is information in which the alarm target device is associated with the backup pattern name. Also, "switching pattern information" is information in which all channels (single or multiple) of the switching device to be switched to avoid the failure when an alarm occurs are grouped into one group and a backup pattern name is given. is there. An example of this "switching pattern information" is shown in FIG. In this FIG.
The switching pattern information of the backup pattern name "line down backup I" includes "channel 1 of switching device A".
"Switching", "Switching channel B of switching device B" is described, and switching pattern information of the backup pattern name "line down backup II" includes "switching channel 2 of switching device A" and "switching device B". Channel 2 switching "and" channel C switching of switch C ".
The various information D input to the input unit 11 is passed to the registration processing unit 12, and the selection information of the switching device by the operator is passed to the switching pattern determination unit 17.

The registration processing unit 12 writes the "alarm ranking information" in the alarm ranking registration table 13 as importance ranking information. Further, the registration processing unit 12 edits the “switching pattern information” into a backup information definition body 15 a as shown in FIG. 16 and writes it in the backup definition body file 15. This backup information definition 15a
Is data in which a series of control commands for backup are listed in time series. Further, the registration processing unit 12
The contents of the switching device table 14 are rewritten based on the name of this backup information definition and the "alarm / pattern correspondence information". This switching device table 14
As shown in FIG. 16, is a table in a format in which the alarm target device and the backup information definition name are associated with each other.

The alarm analysis unit 16 as an important fault identifying means is notified of a fault from all the switching devices 2 and 3 in the line network. This way all fault notifications are concentrated on the only console in the network,
You can know the root cause of the failure. And
When the alarm analysis unit 16 receives a plurality of alarm notifications from the respective switching devices 2 and 3 at the same time, the alarm analysis unit 16 refers to the priority order of the alarms registered in the alarm order registration table 13 to check a plurality of these simultaneous occurrences. Of the alarms, the one with the highest importance, that is, the abnormal information closest to the root cause is specified, and the specified alarm is displayed on the display unit 19
Display on the console alarm display screen of.

FIG. 17 shows a display example of the console alarm display screen of the display unit 19 as the display means. In the screen shown in FIG. 17, three alarms have occurred in the past (a single alarm has occurred or a plurality of alarms have occurred simultaneously), and the line abnormality of the switching device A has the highest importance in the first alarm occurrence. It is identified as a high alarm, and the terminal down of the switching device B is identified as the most important alarm in the next alarm occurrence, and the terminal power-off of the switching device C is the most important alarm in the next alarm occurrence. Has been identified as a high alarm.

The switching pattern determining unit 17 as the switching device specifying means refers to the switching device table 14 on the basis of the switching device selection information input through the input unit 11 by the operator looking at the display unit 19, The backup information definition program name corresponding to the selected switching device 2 or 3 is read and the switching instruction unit 18 is notified.

The switching instruction section 18 as the switching instruction means is
Based on the backup information definition body name notified from the switching pattern determination unit 17, the corresponding backup information definition body is read from the backup definition body file 15. Then, a control command to each switching device 2 or 3 is generated according to this backup information definition structure, and this control command is transmitted to each switching device 2 or 3.

Of these components, the alarm analysis unit 16, the switching pattern determination unit 17, and the switching instruction unit 18 will be described in more detail below. [Alarm Analysis Unit] The alarm analysis unit 16 determines the importance of a failure by classifying the failure detected by one of the switching devices 2 and 3 by the generated layer, and gives priority to the failure having the highest importance. To the operator (displayed on the display unit 19). The fault information of low importance notified at the same time is displayed as detailed information separately from the important fault information. Further, when a fault that has occurred once is restored, only the corresponding fault classification is updated from the fault information stored internally. As a result, the latest highest priority failure is constantly prioritized and notified to the operator (display unit 1
9) will be displayed.

FIG. 18 is a block diagram showing the detailed structure of the alarm analysis unit 16. As shown in FIG. 18, the alarm analysis unit 16 includes an alarm receiving mechanism 41 that directly receives a failure notification from the switching devices 2 and 3, and an alarm detailed management mechanism 42 connected to the alarm receiving mechanism 41.
And alarm determination mechanism 43, and this alarm determination mechanism 43
The alarm display mechanism 44, the alarm detail file 45 connected to the alarm detail management mechanism 42, and the alarm state table 46 connected to the alarm determination mechanism 43.

The alarm receiving mechanism 41 performs transmission / reception with the switching devices 2 and 3 in a packet procedure. And
As shown in FIG. 22, when the fault notification message is received from the switching devices 2 and 3, the alarm detail management mechanism 42 is notified (S111), and the switching devices 2 and 3 are notified of a normal reception response (S112). ).

As shown in FIG. 23, the alarm detail managing mechanism 42 attaches date information to the alarm information received from the alarm receiving mechanism 41 (S121) and stores it in the alarm detail file 45 (S122). For example, the time
When the alarm information indicating that the line abnormality has occurred in the switching device A2 at 10:30, the alarm detail management mechanism 42 provides the alarm information “switching device A 10:30 line fault” with the alarm detail file 45. To store.

As shown in FIG. 24, the alarm judging mechanism 43 writes the failure status indicated by the alarm information received from the alarm receiving mechanism 41 in the alarm status table 46 (S131). Then, alarm status table 4
The alarm display mechanism 44 is notified of the most important failure state among the failure states related to the switching device described in No. 6 (S132). Further, the alarm determination mechanism 43 is
Upon receiving the alarm recovery information from the alarm receiving mechanism 41, the description of the failure information described in the alarm status table 46 of the alarm information is canceled (deleted) (S133). Then, the alarm display mechanism 44 is notified of the most important failure state among the failure states related to the switching device listed in the alarm state table 46 (S134).

FIG. 19 shows a specific structure of the alarm state table 46. As shown in FIG. 19, the alarm status table 46 has a format for managing the failure status for each switching device.

As shown in FIG. 25, the alarm display mechanism 44 displays the alarm information received from the alarm determination mechanism 43 on the console alarm display screen of the display section 19 (S141). The alarm display mechanism 44 is
If the display for specifying a certain switching device 2 or 3 has already been performed, the display is updated by overwriting (S142).
Further, the alarm display mechanism 44 is the alarm determination mechanism 4
When the alarm recovery information is received from S3, the display for specifying the switching device indicated by the alarm recovery information is deleted from the console alarm display screen of the display unit 19 (S143). [Switching Pattern Determining Section] The switching pattern determining section 17 enables selection of a definition body in which an operation procedure is defined in advance by only one kind of simple operation, and can specify a different backup method and backup path depending on the cause of abnormality. It was done.

FIG. 20 is a block diagram showing a detailed structure of the switching pattern determining section 17. As shown in FIG. 20, the switching pattern determination unit 17 includes a backup instruction mechanism 51 connected to the input unit 11.

This backup instruction mechanism 51 is shown in FIG.
As shown in FIG. 3, the switching device name selected by the operator who sees the console alarm display screen of the display unit 19 is changed to the input unit 1
It is read via 1 (S151). Next, the switching device table 14 is searched, the device information associated with the read switching device name is read (S152), and the corresponding backup information definition name is read (S153). Next, the related device information and backup information definition name are displayed on the console alarm display screen of the display unit 19 (S1).
54). Next, the device information and the backup information definition program name read as described above are notified to the definition program analysis mechanism 61 of the switching instruction unit 18 (S155). [Switching Instruction Unit] The switching instruction unit 18 is for automatically performing a series of backup operations indicated in the corresponding backup information definition body based on the backup information definition body name determined by the switching pattern determination unit 17. It is a thing.

FIG. 21 is a block diagram showing a detailed structure of the switching instruction section 18. As shown in FIG. 21, the switching instructing unit 18 includes a definition structure analyzing mechanism 61 directly connected to the switching pattern determining unit 17, and the definition structure analyzing mechanism 6.
1 is composed of a channel switching command creating mechanism 62 and a terminal power-on command creating mechanism 63, and a communication mechanism 64 connected to the channel switching command creating mechanism 62 and the terminal power-on command creating mechanism 63. .

As shown in FIG. 27, the definition program analyzing mechanism 61 reads the corresponding backup information definition program from the backup definition program file 15 based on the backup information definition program name notified from the switching pattern determining section 17 (S161). ). Next, it is checked whether or not the command name described in the first entry of the read backup information definition structure matches the command name registered in advance in the switching instruction section 18 (S162). Next, it is checked whether or not the device name to be processed by this command matches the device name registered in advance in the switching instruction section 18, and various other parameters are checked (S163). After the above check is completed,
The definition structure analysis mechanism 61 activates the command creation mechanisms 62 and 63 in order from the command name described in the first entry of the backup information definition structure and in accordance with each command name stored in this backup information definition structure ( S1
64).

As shown in FIG. 28, the channel switching command creating mechanism 62 uses the switching device (the switching device on the originating side in the detour line, here, tentatively) in the command name notified by the definition structure analyzing mechanism 61. , Switching device 1
A switching command requesting to switch the corresponding channel is created, and the switching command message is notified (S171). Next, when a response indicating that the switching has been normally completed is received from the switching device 1, the switching device (the receiving side in the detour line of the receiving side in the detour line) shown next in the command notified from the definition body analysis mechanism 61 is received. The switching device, here, for example, the switching device 2) is made to create a switching command requesting to switch the corresponding channel, and this switching command message is notified (S17).
2). Next, the backup state is displayed on the display screen of the display unit 19 (S173). Next, the definition body analysis mechanism 61 is notified that the switching has been performed normally. Upon receipt of this notification, the definition program analyzing mechanism 61 performs processing based on the command name described in the next entry of the backup information definition program.

As shown in FIG. 29, the terminal power-on command creating mechanism 63 responds to the switching device (provisionally, the switching device 1 here) indicated by the command name notified from the definition program analyzing mechanism 61. A power-on command for requesting an operation to power on the corresponding terminals 4 and 5 is created, and this power-on command message is notified (S181). Next, the terminal power-on state is displayed on the display screen of the display unit 19 (S182). Next, confirm that you have turned on the terminal power normally.
Notify the definition program analysis mechanism 61 (S183). Upon receipt of this notification, the definition program analyzing mechanism 61 performs processing based on the command name described in the next entry of the backup information definition program.

The communication mechanism 64 is a mechanism for talking with the switching devices 2 and 3 in the packet procedure. As shown in FIG. 30, the communication mechanism 64 establishes a session with the switching devices 2 and 3 requested by the channel switching command generating mechanism 62 or the terminal power-on command generating mechanism 63 (S191). Next, the requested electronic message is notified to the switching devices 2 and 3 (S192). Then, after receiving the response from the switching devices 2 and 3 which notified the message, the command creating mechanisms 62 and 63 of the request source are completed and returned (S1).
93). <Operation of Embodiment> Next, the operation of the first embodiment of the present invention configured as described above will be described. [First Action] Now, as shown in FIG. 31, one host computer 4, a plurality of servers 5a, and a plurality of clients, each of which is connected to the public network through a number of switching devices 2. It is assumed that the network is configured from 5b. Then, when an abnormality occurs in one of the servers 5a, this server 5a is affected by the abnormality.
An anomaly may also occur in the switching device 2 connected to a. In this way, when an abnormality occurs in a plurality of devices, an alarm is notified to the console 6 for each abnormality. That is, the alarm indicating the terminal abnormality of the server 5a causing the original abnormality is notified, and the alarm indicating the line abnormality of the switching device 2 causing the accompanying abnormality is also notified.

The alarm analysis unit 16 of the console 6 refers to the alarm rank registration table 13 and considers the importance of these two alarms. Then, it is presumed that this terminal abnormality is an original abnormality of the highest importance. [Second Action] Further, as shown in FIG. 32, a server 5 is provided between the host computer 4 and the client 5b.
It is assumed that they are connected by two lines with a and 5a interposed. And one of these lines and the server 5
It is assumed that a is normally used as the active system and the other line and the server 5a are used as the standby system. In the network having such a configuration, the active server 5
When a failure occurs in a, a switching device (here, temporarily, switching device A) connecting this active server 5a to the public line notifies the console 6 of an alarm indicating a terminal abnormality. At this time, the console 6 needs to sequentially instruct the switching operation to each switching device 2 located on the working line and the standby line.

Switching pattern determination unit 17 of console 6
When the operator inputs the information to select the switching device A via the input unit 11, reads the corresponding backup information definition name with reference to the switching device table 14 (see FIG. 33). Then, the switching instruction unit 18
Reads out the backup information definition structure indicated by this backup information definition structure name from the backup definition structure file 15. In this backup information definition structure,
As shown in FIG. 33, a series of commands for switching the switching device, switching the switching device, switching the switching device, switching the switching device, and turning on the standby server power are described in order. Based on this backup information definition, the switching instruction unit 18 first issues a switching command for connecting the host computer 4 and the switching device to the switching device,
Next, a switching command that connects the switching device and the standby server is issued to the switching device, and then a switching command that connects the switching device and the client is issued to the switching device. Issue a switching command to connect the standby server and switching device to the device,
Finally, the power-on command is issued to the standby server.

As described above, since the instruction procedure to each device is registered in advance as the definition body, the operator can complete the backup operation by a simple operation of inputting the switching device name.

[0055]

Second Embodiment <Overall Configuration of Communication System> A second embodiment of the present invention is shown in FIG. In the second embodiment, compared with the first embodiment, the alarm analysis unit 16 has a switching pattern determination unit 1.
It is characterized in that it is directly connected to 7 and can automatically execute a backup process (backup information definition structure) corresponding to an alarm determined to be the most important and the closest to the root cause. [Console] [Alarm Analysis Unit] FIG. 35 shows a detailed configuration of the alarm analysis unit 16 according to the second embodiment. As is apparent from FIG. 35, the alarm analysis unit 16 according to the second embodiment does not have the alarm display mechanism 44, and the alarm determination mechanism 43 in the alarm analysis unit 16 directly operates the switching pattern determination unit 17. It is connected to the. Therefore, the function of the alarm determination mechanism 43 is slightly different from that of the first embodiment. That is, as shown in FIG. 37, the alarm determination mechanism 43 writes the failure status indicated by the alarm information received from the alarm reception mechanism 41 in the alarm status table 46 (S201). Further, the alarm determination mechanism 43 is
When the alarm recovery information is received from the alarm receiving mechanism 41, the description of the failure information indicated in the alarm recovery information of the alarm status table 46 is canceled (deleted) (S202). Then, the switching pattern determination unit 17 is notified of the failure state having the highest importance among the failure states related to the switching device described in the alarm state table 46 (S203).

[Switching Pattern Determining Section] FIG. 36 shows a detailed configuration of the switching pattern determining section 17 according to the present embodiment. As is apparent from FIG. 36, the switching pattern determination unit 17 according to the second embodiment is provided with an automatic backup mechanism 52 that directly receives the failure information notified from the alarm analysis unit 16 in the preceding stage of the backup instruction mechanism 51. ing. As shown in FIG. 38, when the automatic backup mechanism 52 receives the alarm of the critical failure from the alarm analysis unit 16 (S211), it notifies the alarm of the critical failure by a timer preset for a certain period of time. Waiting for a recovery notification from the same switching device 2 or 3 or a notification of a further important failure occurrence, and after a certain period of time without these notifications, the received failure is confirmed (S
212). Next, the determined failure is analyzed and the line failure and the terminal failure are separated (S213). Then, in the case of a line failure, the switching device table 14 is searched for a definition structure name of a backup information definition structure for backing up the corresponding line based on the line information of the failure (S).
214). In the case of a terminal failure, the definition device name for backing up the failed terminal is searched in the switching device table 14 (S215). Next, it is checked whether or not the backup definition defined in S214 or S215 is being activated (S216). next,
The backup instruction mechanism 51 is requested to activate the corresponding backup definition body (S217). Next, the display unit 19 is notified that the corresponding device (the device in which the important failure has occurred) is in the backup state (S21).
8). Upon receipt of this notification, the display unit 19 displays on the console alarm display screen when this device is in the backup state. Next, the alarm analysis unit 16 is requested to mask the alarm associated with the backup that is considered to be transmitted from the corresponding switching devices 2 and 3 (S).
219).

In step S217, the backup instruction mechanism 51 requested to start the corresponding backup information definition program.
Reads the corresponding backup information definition name from the switching device table 14 as shown in FIG. 39 (S22).
1). Next, the related device information and backup information definition name are displayed on the console alarm display screen of the display unit 19 (S222). Next, the device information and the backup information definition name read as described above are notified to the definition analysis unit 61 of the switching instruction unit 18 (S22).
3).

Other configurations in the second embodiment are as follows.
Since it is exactly the same as that of the first embodiment, its explanation is omitted. <Operation of Embodiment> Next, the operation of the second embodiment of the present invention configured as described above will be described.

Now, as shown in FIG. 40, the alarm analysis unit 16 is simultaneously notified of an alarm of a device abnormality of the terminal,
It is assumed that a line abnormality (line abnormality 1) alarm and another line abnormality (line abnormality 2) alarm are notified. Then, it is assumed that the alarm analysis unit 16 determines the alarm of the device abnormality as the most important failure from among them. Then, the automatic backup mechanism 52 in the switching pattern determination unit 17 determines this device abnormality as the fault of the root cause after a lapse of a certain fault determination time, and executes the backup information definition body 1 corresponding to this device abnormality. Identify as what should be done. As a result, the switching instruction unit 18 executes a series of backup processes written in the backup information definition body 1. In the automatic backup mechanism 52 in the switching pattern determination unit 17, the alarm analysis unit 16 sets the line error 1
Is determined as the most important failure, the backup information definition body 2 corresponding to the line abnormality 1 is specified as the one to be executed, and the alarm analysis unit 16 determines the line abnormality 2 as the most important failure. Specifies that the backup information definition body 3 corresponding to the line abnormality 2 is to be executed.

The other operation in this embodiment is the first one.
Since it is exactly the same as that of the embodiment, its explanation is omitted.

[0061]

Third Embodiment In the third embodiment of the present invention, each switching device 2, 3 has a mechanism 28 for masking a failure notification from the terminal 5 (abnormal masking mechanism when the terminal power is off). Only the difference from the above-described first embodiment. The abnormality masking mechanism 28 in the terminal power-off state automatically generates alarms such as power-on or power-off of the monitored terminal 5 that need not be notified to the operator and alarms such as line disconnection that need to be notified to the operator. It is a mechanism to cut it into pieces. That is, the abnormal mask mechanism 2 when the terminal power is off
As shown in FIG. 43, when receiving a power-off notification from the terminal power supply monitoring mechanism 33 of the terminal 5, 8 updates the contents of the alarm state monitoring table 29 provided therein (S231). This alarm status monitoring table 2
As shown in FIG. 42, reference numeral 9 indicates whether or not there is a notification mask for all terminals 4 connected to the switching devices 2 and 3.
Presence / absence of line abnormality, presence / absence of terminal life, and power ON / O
The FF is shown. It should be noted that the presence / absence of this notification mask is arbitrarily set for each terminal. When the alarm state monitoring table 29 is updated in S231, the power ON / OFF column for the corresponding terminal 4 is rewritten as "OFF".

Abnormality mask mechanism 28 when the terminal power is off
When the column of “notification mask” of the alarm state monitoring table 29 is “present” and the column of “power supply” is “OFF”, the line signal changes (CD, CS) when the DR signal is OFF. Is not notified to the console notification mechanism 27 (S232). Further, the abnormality masking mechanism 28 in the terminal power-off state, when the “notification mask” column of the alarm state monitoring table 29 is “present” and the “power source” column is “OFF”, Terminal life and death monitoring mechanism 32
Does not notify the console notification mechanism 27 of the abnormality notification from (S233). In addition, when the "notification mask" column of the alarm status monitoring table 29 is "present", the abnormality masking mechanism 28 in the terminal power-off state or the terminal power-off state or the terminal power-off state is changed. No notification of no response is sent to the console notification mechanism 27.

[0063]

As described above, according to the line switching control device of the present invention, an abnormality which is the root cause of another abnormality is identified from among a plurality of abnormalities on the line in the line network. The line can be switched to avoid this abnormality.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a block diagram showing a communication system according to the first exemplary embodiment of the present invention.

3 is a block diagram showing a detailed configuration of a switching device and a terminal of FIG.

4 is a flowchart showing the function of a line monitoring mechanism in the switching device of FIG.

5 is a flowchart showing the function of a terminal life-and-death monitoring mechanism in the switching device of FIG.

6 is a flowchart showing the function of a terminal power supply monitoring mechanism in the switching device of FIG.

7 is a flowchart showing the function of a terminal down monitoring mechanism in the switching device of FIG.

8 is a flowchart showing the function of the backup line monitoring mechanism in the switching device of FIG.

9 is a flowchart showing functions of a self-hardware monitoring mechanism in the switching device of FIG.

10 is a flowchart showing the function of the console notification mechanism in the switching device of FIG.

11 is a flowchart showing the functions of the line mechanism in the terminal of FIG.

FIG. 12 is a flowchart showing the function of a terminal life-and-death monitoring mechanism in the terminal of FIG.

13 is a flowchart showing the function of a terminal power supply monitoring mechanism in the terminal of FIG.

14 is a flowchart showing the function of a terminal down monitoring mechanism in the terminal of FIG.

15 is an explanatory diagram of the switching pattern information of FIG.

16 is an explanatory diagram of the switching device table and the backup information definition structure of FIG. 2;

FIG. 17 is an explanatory diagram of a console alarm display screen of the display unit in FIG.

FIG. 18 is a block diagram showing a detailed configuration of an alarm analysis unit in FIG.

FIG. 19 is an explanatory diagram of an alarm status table of FIG.

FIG. 20 is a block diagram showing a detailed configuration of a switching pattern determining unit in FIG.

FIG. 21 is a block diagram showing a detailed configuration of a switching instruction section in FIG.

22 is a flow chart showing the function of the alarm receiving mechanism of FIG.

23 is a flowchart showing the functions of the alarm detail management mechanism of FIG.

FIG. 24 is a flowchart showing the function of the alarm determination mechanism of FIG.

FIG. 25 is a flowchart showing the function of the alarm display mechanism of FIG.

FIG. 26 is a flowchart showing the functions of the backup instruction mechanism of FIG.

FIG. 27 is a flowchart showing the function of the definition structure analysis mechanism of FIG. 21.

FIG. 28 is a flowchart showing the functions of the channel switching command creation mechanism mechanism of FIG. 21.

FIG. 29 is a flowchart showing the functions of the terminal power-on command creation mechanism mechanism of FIG. 21.

FIG. 30 is a flowchart showing the functions of the communication mechanism of FIG. 21.

FIG. 31 is an explanatory diagram of the first operation of the first embodiment of the present invention.

FIG. 32 is an explanatory diagram of a second operation of the first embodiment of the present invention.

FIG. 33 is an explanatory diagram of a second action of the first embodiment of the present invention.

FIG. 34 is a block diagram showing a communication system according to a second embodiment of the present invention.

35 is a block diagram showing a detailed configuration of an alarm analysis unit in FIG. 34.

FIG. 36 is a block diagram showing a detailed configuration of a switching pattern determination unit shown in FIG. 34.

37 is a flowchart showing the function of the alarm determination mechanism of FIG. 35.

38 is a flowchart showing the function of the automatic backup mechanism of FIG. 36.

FIG. 39 is a flowchart showing the functions of the backup instruction mechanism of FIG. 36.

FIG. 40 is an explanatory diagram of the operation of the second embodiment of the present invention.

FIG. 41 is a block diagram showing a detailed configuration of a switching device and a terminal according to a third embodiment of the present invention.

42 is an explanatory diagram of an alarm status monitoring table in FIG. 41.

43 is a flowchart showing the function of the abnormality masking mechanism when the terminal power is off in FIG. 42.

FIG. 44 is an explanatory diagram of a conventional communication system.

FIG. 45 is an explanatory diagram of a conventional communication system.

FIG. 46 is an explanatory diagram of a conventional communication system.

[Simple explanation of symbols]

1 line network 2 Switching device A 3 Switching device B 4 Host computer 5 terminals 6 consoles 13 Alarm ranking registration table 14 Switching device table 15 Backup definition file 16 Alarm analysis section 17 Switching pattern determination unit 18 Switching instruction section

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Claims (4)

(57) [Claims] 1. A line switching control device for switching a line set between a plurality of terminals in a line network including a plurality of switching devices, wherein the highest priority is given to faults that occur simultaneously on the line. High-impedance failure identification means to identify failures, and avoid the failures identified by this important failure identification means
All that is needed on the line to switch the line
Bei a switching device specifying means for specifying a switching device, and a switching instruction means for instructing switching of the line to the switching device specified by the switching device specifying means Te
The switching device specifying means avoids a failure that occurs and this failure.
Device names of all switching devices to be switched
In addition to having a corresponding table,
Switching according to the failure identified by the failure identification means
A line switching control device, characterized in that the device name of the switching device to be obtained is read from this table . 2. The important fault identifying means has importance ranking information in which the ranking of importance is given in advance for each type of fault, and the significance among the faults simultaneously occurring on the line is 2. The line switching control device according to claim 1, wherein a failure having the highest importance in the priority information is specified as the failure having the highest importance. 3. Each switching device in the circuit network has its own failure.
And the failure of the terminal connected to itself to identify the critical failure
The line switching according to claim 1, wherein the step is notified.
Control device. 4. Each switching device in the circuit network has its own
The above-mentioned critical failures of some of the failures of connected terminals
Claims characterized by masking notification to harm identification means
Item 3. The line switching control device according to item 3.