JPH02288527A - Distributed fault diagnosis method - Google Patents

Abstract

PURPOSE:To attain first location of a fault easily, quickly and efficiently by locating outline connection information of a device in a network to a total control equipment and detailed information in a sub network to an individual subnetwork control equipment decentralizingly. CONSTITUTION:A message reception analysis section 11 of a total management equipment 1 receives a fault message from subnetwork management equipments 2a-2c and a fault diagnostic section 13 estimate a fault location based on total management constitution device connection information 12 and fault information. A diagnostic instruction message transmission section 14 instructs detailed diagnosis to a subnetwork management equipment to which an estimated fault location belongs. A fault diagnostic section 8 of the subnetwork control equipment specifies the detailed fault location in the subnetwork with connection information 6a of the subnetwork constitution device and subnetwork constitution device detailed information 5a. Thus, the first location of a fault in the total network control system is implemented easily, quickly and efficiently.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a management device that manages a transmission network such as a high-speed multiplexer or a modem, a management device that manages a switching network such as a PBX or a packet switch, A management device that manages information networks such as computers and terminals,
In an integrated network management system consisting of the above-mentioned lower subnetwork management devices, a general management device that manages the entire network by connecting to the lower subnetwork management devices, and the entire set of networks managed by these management devices, network failures occur. Concerning the method of making a diagnosis.

[Conventional technology]

In recent years, as information networks have become larger and more complex, there are high expectations for network management systems due to various demands such as reduction of operator load and 24-hour unmanned operation. The devices that make up an information network are a mixture of various devices, and for example, it is impossible to have a network that is only related to computers.
Modems, packet switches, telephones, I-'AX, etc. coexist, and devices from different manufacturers are connected, making them increasingly complex. Under these circumstances, a so-called distributed/integrated management system has been proposed as a network management system.

Distributed/integrated type means that the entire network is divided into transmission networks such as high-speed multiplexers and modems, switching networks such as PBXs and packet switches, and information networks such as computers and terminals from the perspective of layering communication protocols. Consider these subnetworks separately and install a management device to manage each subnetwork to manage each individual network (
Distributed management) method, and a central management device that collects information from these management devices, makes predetermined decisions based on the information, and gives instructions to the subnetwork management devices, is connected to all subnetwork management devices. (overall management)
This method is a combination of the following methods. A system that uses this method is called an integrated network management system.

When diagnosing faults in information network integrated management systems, the scale of the network increases.

Due to the increasing complexity, fault diagnosis systems using knowledge engineering are beginning to attract attention. However, even a fault diagnosis system using knowledge engineering has its limits in terms of capacity and ability. As a countermeasure, for example, Japanese Patent Application Laid-Open No. 62-276627
As mentioned above, it is not limited to fault diagnosis of information networks.
Each of the plurality of processing means is provided with a knowledge base, and if each processing means cannot diagnose the diagnosis using its own knowledge base, the system is used to request the diagnosis to other processing means.

[Problem to be solved by the invention]

The above-mentioned conventional technology does not give consideration to fault diagnosis of large-scale information networks.

For example, when a network becomes large-scale and the number of devices that make up the network, such as nodes, links, etc. increases, or when the configuration information of devices becomes more detailed in order to diagnose and isolate faults at a more detailed level, The base becomes larger. Due to the nature of networks, when diagnosing network faults, it is impossible to know where the fault will occur, and even if you simply physically divide the network and separate knowledge bases for diagnostic processing, it will be difficult to diagnose faults in multiple divided parts. Since the problem will occur across different areas, there is a high possibility that it will be impossible to diagnose the problem.

This also leads to a longer processing time for diagnosis.

In addition, detailed diagnosis is not necessary for the primary isolation of network fault diagnosis, and it is desirable to immediately identify the general fault location and perform processing such as switching. All you need to do is specify the location.

An object of the present invention is to easily, quickly, and efficiently perform primary isolation of a fault in an integrated network management system. It also aims to quickly and efficiently diagnose faults in large-scale information networks.

[Means to solve the problem]

In order to achieve the above object, a management device that manages a transmission network, a management device that manages a switching network, a management device that manages an information network, and the above-mentioned subnetwork management devices.

In an integrated network management system consisting of an integrated management device that is connected to a subnetwork management device and manages the entire network, and the entire set of networks managed by these management devices, transmission network management equipment, switching network management equipment, and information network management The device has a knowledge base of detailed information and connection information of the component devices in these networks, and the central management device has a knowledge base of connection information of the component devices of the entire information network. The knowledge base is used to estimate the location of the failure, and the lower subnetwork management device has means for performing detailed analysis of the location of the failure within its own management network. This makes it possible to diagnose faults in large-scale information networks quickly and efficiently.

Using this, the water level subnetwork management device that has detected a fault occurring in its own management network notifies all fault detection information to the central management device, and the central management device can roughly identify the location of the fault from the fault information. This system is equipped with means for instructing the lower subnetwork management device to which the faulty part belongs to carry out detailed fault diagnosis. This makes it possible to perform primary isolation of failures in the integrated network management system easily, quickly, and efficiently.

In addition, in the method of roughly identifying the location of a failure from the failure information in the central management device, connection information between terminals in the transmission network, connection route information of relay lines, and connection information in the switching network are used. The switching network is calculated from the connection information on the terminal side and relay side, the connection information on the terminal side and relay side in the information network, and the connection information between the relay line and terminal line of different subnetworks at each subnetwork boundary. Automatically generate exchange user routes, which are physical connection route information for terminal lines, and end user routes, which are physical connection route information for terminal lines in information networks.
This method estimates the location of a fault within the network based on the connection route information and fault information. This makes it possible to easily, quickly and efficiently perform primary isolation of failures in the integrated network management system.

[Effect]

This fault diagnosis method collects all fault detection information from the water level subnetwork management device that has detected a fault occurring in its own management network to the central management device, and the central management device uses the fault information to roughly identify the location of the fault. Since the system identifies and instructs the corresponding lower subnetwork management device of the location where the fault has occurred to perform detailed fault diagnosis, there is no possibility of malfunction.

In addition, in another example of this fault diagnosis method, the lower subnetwork management device that detects a fault that occurs in its own management network always performs a detailed fault diagnosis, and the results of the fault diagnosis and information on whether the fault diagnosis is possible are sent to the central management device. At the same time, failure detection information is also notified, which is collected by the central management device and managed centrally.

The device will not malfunction because it will notify the subnetwork management device r4, which cannot diagnose the fault, if necessary, of the location and cause of the fault determined from the collected information.

In another example of the one-line fault diagnosis method, the lower subnetwork management device that detects the fault to be ordered to its own management network first determines whether or not diagnosis is possible, and if yes, performs a detailed fault diagnosis. Notify the central management device,
If a failure cannot be diagnosed, the central management device is immediately notified, and at the same time, the failure detection information is also notified, and the central management device notifies the subnetwork management device that cannot diagnose the failure of the location and cause of the failure derived from the notification information. This will prevent malfunctions.

〔Example〕 The present invention will be explained below using examples.

FIG. 1 shows an example of the configuration of a system using the information network distributed fault diagnosis method according to the present invention.

This diagram shows transmission network management equipment 2a that manages transmission networks such as high-speed multiplexers and modems, switching network management equipment 2b that manages switching networks such as 13BX and packet switches, information on computers and terminals, etc. An embedded information network N2a that manages the system network, the above-mentioned lower sub-network management devices, and a central management device 1 that manages the entire network by connecting to the lower sub-network management devices.
This is an integrated network management system consisting of a network 3 consisting of the entire set of subnetworks managed by these subnetwork management devices.

FIG. 2 shows a specific example of the configuration of an integrated network management system. The network 3 is a transmission network 3a,
It consists of a switching network 3b and an information network 3c.

The transmission network 3a is a high-speed multiplexing device f71t20a
, 20b, 20e, etc., and is managed by the transmission network management device 2a.

The switching network 3b is a network composed of PBXs 21a, 21b, packet switches 22a, 22b, 22c, etc., and is managed by the switching network management device 2b.

The information system network 3c includes communication control processing devices 23a, 2
3b, 23c, 23d, 23e and telephones 24a, 24b
This is a network consisting of computers, FAX machines 25a and 25b, etc., and is managed by the information network management system [2c].

The overall management device 1 includes the above subnetwork management device [2a
, 2b, and 2c to manage the entire network.

In FIG. 1, subnetwork management devices 2a, 2b
, 2c each has a failure detection unit 4 that collects and detects failure information from the subnetworks managed by each of them. When the failure detection unit 4 detects a failure, it notifies the message analysis/transmission unit 7 of the fact and contents. do. The message analysis/transmission section 7 sends the fault information as it is to the message reception/analysis section 11 of the central management device 1.

When the message reception/analysis unit 11 of the central management device 1 receives a fault message from the lower subnetwork, it analyzes it, converts it into a table for fault diagnosis, and notifies the fault diagnosis unit 13. The fault diagnosis unit 13 is the lower subnetwork management device 2a.

2b and 2c have component connection information 12 for overall management consisting of subnetwork component connection information 6a, 6b, and 6c, respectively, and connection information between subnetworks. That is, 12 = 6a + 6b + 6c + (inter-subnetwork connection information).The fault diagnosis unit 13 estimates the location of the fault based on this overall management component connection information 4N12 and the fault information.The fault location estimation result is used as a diagnostic instruction. 0 diagnosis instruction message sent to message transmitter 14
The transmission unit 14 instructs the lower sub-network management device to which the failure portion estimated by the failure diagnosis unit 13 belongs, for example, 2a, if the cause is found in the transmission network, for detailed diagnosis.

The lower subnetwork management device 2a receives the detailed diagnosis instruction through the overall instruction message receiving section 9.

The overall instruction message receiving section 9 sends detailed diagnosis instructions to the fault diagnosis section 8 of the lower subnetwork management device. The fault diagnosis unit 8 of the subnetwork management device has connection information 6a of subnetwork constituent devices and detailed information 5a of subnetwork constituent devices, and can specify a detailed fault location within the lower subnetwork. Diagnosis results obtained by specifying the detailed faulty part are sent to the target specifying section 10.

Although the output to the display device of the management device is not particularly described, it is assumed that the output is displayed whenever necessary.

Next, a method for estimating the location of a failure using the overall management component connection information 12 and failure information in the failure diagnosis section 13 will be explained.

FIG. 3 shows an example of the configuration of the component connection information 12 for overall management. The connection information 6a, 6b, and 6c of the transmission network, switching network, and sub-network component devices of the Tentacles are developed in memory, respectively, and are called the transmission network connection table, the switching network connection table, and the information network connection table. Connection table 6a
consists of a relay line route table 34 on the relay side of the component equipment and a terminal side connection table 35 on the terminal side. The switching network connection table 6b is a relay side connection table 36 on the relay side of the component equipment.
, and a terminal-side connection table 37 on the terminal side. The information network connection table 6c consists of a relay side connection table 38 on the relay side of the component equipment and a terminal side connection table 39 on the terminal side. Only the trunk line route table 34 of the transmission network has connection information for a plurality of transmission system devices.

The inter-subnetwork connection information is connection information between the relay side and the terminal side at each subnetwork boundary. It consists of a transmission/exchange connection table 40, a transmission/information connection table 41, and an exchange/information connection table 42.

From the above connection table, an exchange user route 43, which is the connection information of the terminal line of the exchange network, and an end user route 44, which is the connection information of the terminal line of the information application network, are automatically generated.

Next, FIG. 4 shows a schematic flow of the method for generating the end user route 44. Start processing (50) L. First, extract the connected user from the information network terminal side connection table 39 and store it in the end user route storage table (51). The user extracted in (51) from the information network relay side connection table 3. The information on the relay side connected to is stored in the end user route storage table (52).

Next, search the exchange/information connection table 42 (52)
Find the relay side group extracted in (53).

If the relay side group can be discovered by searching (55)
If not possible, move to (60) (54).

If it can be found by searching the exchange/information connection table 42, extract the number of exchange network terminals from the exchange/information connection table 42 (55), store it in the end user route storage table (56), and retrieve it from the exchange network relay side connection table 36. (5
Store the information on the relay side that connects to the number of switched network terminals retrieved in 5) in the end user route storage table (57)
.

Next, the transmission/exchange connection table 40 is searched and (57
) to search for the relay side group taken out (58).

If the relay side group can be discovered by searching (63)
If it can't be done, move on to (66) and end! do (59),
If found through the search, the name of the transmission MA terminal side is extracted from the transmission/exchange connection table 40 (63) and stored in the end user route storage table (64).

The connection route information of the relay side connected to the transmission network terminal side name extracted from the transmission network relay line route table 34 or 663 is stored in the end user route storage table (65).

If it cannot be found by searching the exchange/information connection table 42 (54), the transmission/information connection table 41 is searched to find the relay side group extracted in (52) (60). If the relay side group can be found by searching, go to (62), otherwise go to (66) and end (61). If the relay side group can be found by search, the transmission network terminal side name is extracted from the transmission/information connection table 41, and (64) (62).

The subsequent processing is performed as described above (64) and (65), and ends (66).

The above process is a process for generating one end user route, and this process is repeated according to the number of users of the information system.For generation of an exchange user route, (51) of this general flow, (52).

(53), (54), (55), (60), (
61) and (62) may be omitted.Furthermore, even when there are not three subnetworks as shown in this example, processing applying this method may be performed.

Next, FIG. 5, which shows an example of how a route table is stored, is an example of the code format of the route table. The route table code 67 is a pointer 68, a line name 69. Affiliation type 70
．． It consists of 71 other pieces of information.

FIG. 6 shows an example of generation by adding a route table. Consider a general network consisting of a transmission network 3a and an information network 3c as shown in FIG. 6(d).

FIG. 5(a) shows the connection relationship between users SAI and SA2 of the information network. The pointer 8 of SAI points to the start address of the area of connection destination SA2, and the pointer 68 of SA2 has the end identifier. (b) shows a state in which connections between relay circuits aLA1 and LA2 on the relay side of the information network have been added.
The pointer 68 of each record is reassigned as shown in the figure. (c) shows the end user route table finally created.

The end user route table created as above,
A method for roughly estimating the location of a failure in the failure diagnosis unit 13 of the central management device 1 will be described using the exchanged user route table.

In a network like the one shown in FIG.

Depending on the cause of the failure, the failure may or may not appear. FIG. 7 shows that a fault message is sent from the subnetwork management devices 2 a * 2 b * 2 c to the central management device 1 depending on the location where the fault occurred, and the central management device 1 determines which location the fault can be detected. Table showing, causes -
This is a result correspondence table 45. 0 indicates that it is always detectable, × indicates that it is not detected, and Δ indicates that it may not be detected depending on the case.

From this table, if a failure on the relay side of the transmission network is detected, it can be concluded that the cause of the failure is the relay side of the transmission network. Furthermore, if a failure on the terminal side of the transmission network or a failure on the relay side of the switching network is detected, the cause of the failure can be presumed to be the terminal side or the relay side of the transmission network. Also,
If a failure on the terminal side of the switching network or a failure on the relay side of the information network is detected, the cause of the failure can be presumed to be somewhere below the relay side of the information network.

Furthermore, if only a failure on the terminal side of the information network is detected, it can be concluded that the cause of the failure is on the terminal side of the information network. In this way, based on the cause-effect correspondence table 45, it is possible to make inferences to identify the location of the failure.

811th! J shows an example of reasoning for identifying a faulty part in the fault diagnosis section 13 of the central management device 1.

The process starts (80), and first it is determined whether a failure on the relay side of the transmission network has been detected (81), and if so, it is determined (82).
), if not, move to (88).

If there is a fault on the relay side of the transmission network, the route table with the faulty line on the relay side of the transmission network is extracted (82).Next, it is determined whether a fault on the relay side of the switching network has been detected (83).
), if there is, go to 84; if not, go to (85). (84)
Now, from the route table restored in (82), select the one based on the fault on the relay side of the switched network.
Next, it is determined whether or not a failure on the relay side of the information network has been detected (85). If there is, go to (86); if not, go to (87).
).

In (86), a process of 0 or more to further select the line base of the failure on the relay side of the information network from the route table restored in (84) determines that the failure is on the relay side of the transmission network (87).

If there is no failure on the relay side of the transmission network in process (81).

It is determined whether or not a failure on the relay side of the switching network has been detected (88). If so, the process moves to (89); if not, the process moves to (93). In (89), a route table with a faulty line on the relay side of the switching network is extracted.Next, it is determined whether a fault on the relay side of the information network has been detected (90).

If there is, go to (91); if not, go to 92. 89 in 91
In the process of selecting 0 or more faulty line bases on the relay side of the information network from the route table restored in step 92, it is determined that the fault is on the terminal side of the transmission network or the relay side of the switching network.

If there is no failure on the relay side of the switching network in the process (88), it is determined whether a failure on the relay side of the information network has been detected (9
3) If there is, go to (94), otherwise go to (96). (
In step 94), a route table containing a faulty line on the relay side of the information network is extracted. In the above processing, it is determined that there is a failure on the terminal side of the switching network or on the relay side of the information network (95).

If there is no failure on the relay side of the information network in the process (93), it is determined whether a failure on the terminal side of the information network has been detected (9
6) If there is, go to (97), otherwise go to (99) and end the process. In (97), it is determined that the failure is on the terminal side of the information network.

All of the processes that pass through processes (87), (92), (95), and (97) include displaying the faulty part in (98),
Alternatively, the subnetwork management device is notified of the failure location.

The method for identifying a faulty part in the central management system Vl 1 has been described above. Detailed part analysis of each sub-network management device is provided by sub-network component connection information 6.
A, etc. and sub-network component device detailed information + M5a, etc., the system performs fault isolation at a more detailed level than the central management unit FIt1, and instructs countermeasures such as fault repair according to the results of the first diagnosis. The method for diagnosing failures in subnetwork management is determined for each individual system, so it will not be described here.

FIG. 9 shows a second configuration example of a system using the information network distributed fault diagnosis method according to the present invention.

The subnetwork management devices 2a, 2b, and 2c have a failure detection section 4. When the failure detection unit 4 detects r4 damage, it notifies the message analysis/transmission unit 7 and the failure diagnosis unit 8 of the subnetwork management device to that effect and the answer. First, the fault diagnosis unit 8 has connection information 6a of sub-network constituent devices and detailed information 5a of sub-network constituent devices, and can identify the detailed fault location within the lower sub-network based on the received message. . Diagnosis results obtained by specifying the detailed failure part are sent to the countermeasure instruction section 10.

If the fault can be diagnosed, the result is sent to the message analysis/transmission section 7, and if the fault cannot be diagnosed, the result is sent to the message analysis/transmission section 7. Message analysis/
The transmitting unit 7 transmits the fault information as it is, the result of the fault diagnosis by the fault diagnosing unit 8, and information on whether or not the fault diagnosis is possible to the message receiving/analyzing unit 11 of the central management device 1.

When the message reception/analysis unit 11 of the central management device 1 receives the fault information as it is from the lower subnetwork, the result of the fault diagnosis by the fault diagnosis unit 8, and the fault diagnosis OJ hat, it analyzes this and uses it for fault diagnosis. This table is converted into a table and notified to the failure diagnosis unit 13. The fault diagnosis unit 13 estimates the location where the fault has occurred based on the overall management component connection information 12, the fault information, the result of the fault diagnosis, and the information on whether or not the fault diagnosis is possible. The failure location estimation result is sent to the diagnosis instruction message transmitter 14. The diagnosis instruction message transmitting section 14 transmits the information on the fault location estimated by the fault diagnosis section 13 to the fault location analysis result to the general instruction message receiving section 9 of the transmission network management device 2a if the transmission network management device 2a cannot diagnose the fault location. report.

The lower subnetwork management device 2a receives the failure part analysis result at the overall instruction message receiving section 9. The overall instruction message receiving unit 9 sends the failure part analysis result to the failure diagnosis unit 8 of the lower subnetwork management device. The fault diagnosis unit 8 of the subnetwork management device displays the cause of the fault on the display device of the management device. Although the output of the management device h''x to the display device is not particularly described, it is assumed that the output is displayed whenever necessary.

FIG. 10 shows a third configuration example of a system using the information network 1 to work breakdown diagnosis method according to the present invention.

The subnetwork management devices 2a, 2b, and 2c have a failure detection section 4. When the failure detection unit 4 detects a failure, it notifies the message analysis/transmission unit 7 of the content. First, the message analysis/transmission section 7 sends fault information to the fault diagnosis section 8 of the subnetwork management device. The fault diagnosis unit 8 has the connection information 6a of the subnetwork component devices and the detailed information 5a of the subnetwork component devices, but it also performs fault diagnosis within the lower subnetwork based on the connection information 611 of the subnetwork component devices and the received message. If the diagnosis is possible, a detailed fault diagnosis is performed and the result is sent to the message analysis/transmission unit 7. Diagnosis results obtained by specifying the detailed failure part are sent to the countermeasure instruction section 10. The message analysis/transmission unit 7 receives the fault information as is.

Message reception/analysis unit 1 in charge of centrally managing the results of the failure diagnosis by the failure diagnosis unit 8 and information on whether or not the failure diagnosis is possible
Send to 1.

When the message reception/analysis unit 11 of the central management device 1 receives the fault information as it is from the lower subnetwork, the result of the fault diagnosis by the ki-an diagnosis unit 8, and the information on whether or not the fault diagnosis is possible, it analyzes this and uses the information for fault diagnosis. It is converted into a table and notified to the fault diagnosis section 13. The fault diagnosis unit 13 estimates the location of the fault based on the overall management component connection information 12, the fault information, the result of the fault diagnosis, and the information on whether or not the fault diagnosis can be performed.The fault location estimation result is sent to the diagnosis instruction message transmission unit 14. If the transmission network management device 2a is unable to diagnose the fault location, the transmission network management device 2a transmits the fault location information estimated by the fault diagnosis section 13 to the overall instruction message receiving section 9 of the transmission network management device 2a. Report the analysis results.

The lower subnetwork management device 2a receives the failure part analysis result at the overall instruction message receiving section 9. The overall instruction message receiving unit 9 sends the failure part analysis result to the failure diagnosis unit 8 of the lower subnetwork management device. The fault diagnosis unit 8 of the subnetwork management device displays the cause of the fault on the display device of the management device. Although the output to the display device of the @processing device is not particularly described, it is assumed that the output is displayed whenever necessary.

〔Effect of the invention〕

According to the present invention, subnetwork management devices such as a management device that manages a transmission network, a management device that manages a switching network, and a management device that manages an information network are connected to the subnetwork management device to manage the entire network. In a comprehensive network management system consisting of a central management device that performs management and the entire set of information networks managed by these management devices, general connection information of devices within the network is transmitted to the central management device, and detailed information within sub-networks is transmitted to the central management device. By distributing the information to individual subnetwork management devices, primary isolation of failures can be performed easily, quickly, and efficiently. The general identification of the failure is given top priority, and detailed isolation is performed after the failure is first repaired by switching, etc., so it is possible to quickly isolate the failure and give instructions for countermeasures.

In addition, fault diagnosis for large-scale information networks is handled by sub-network fault diagnosis.

Since the general management has been simplified, it is possible to handle a large amount of knowledge base, and it can be done quickly and efficiently.

4.11! Brief Description of Screen i1 FIGS. 1, 9, and 10 are block diagrams showing an example of the configuration of a system using the information network distributed fault diagnosis method according to the present invention.

FIG. 2 is a schematic diagram of the configuration of a specific integrated management system.

FIG. 3 is an explanatory diagram showing a configuration example of the component connection information 12 for overall management.

FIG. 4 is a schematic flow diagram of the end user route generation method.

FIG. 5 is a diagram showing an example of the format of a route table code.

FIG. 6 is an explanatory diagram showing an example of generation of a route table.

FIG. 7 is a table diagram showing an example of a cause-effect correspondence table.

FIG. 8 is a flowchart showing an example of reasoning for identifying a faulty part in the fault diagnosis section of the central management device.

1... General management device, 2a... Transmission network management device, 2
b... Switched network management device, 2C... Information network management device,
3... Network, 3a... Transmission system network, 3b... Switching system network, 3c... Information system network, 4... Fault detection unit, 5a, 5b, 5c.
・・Subnetwork component device details information, 6a, 6b,
6c... Connection information of subnetwork constituent devices, 7.
...Message analysis/transmission unit, 8...Fault diagnosis unit of subnetwork management device, 9...General instruction message reception unit, 10...Countermeasure instruction unit, 11...Message reception/analysis unit, 12 . . . Component connection information for overall management, 13 . . . Fault diagnosis section, 14 .
21a, 21b-PBX, 22a, 22b, 22c...
Packet switch, 23a, 23b, 22c.

23d, 23e - communication control processing device, 24a.

24 b-nlRfi machine, 25a, 25b-FAX,
34...Transmission network trunk line route table, 35...
- Transmission network terminal side connection table, 36... Switched network relay side connection table, 37... Switched network terminal side connection table, 38... Information network relay side connection table, 39.
... Information network terminal side connection table, 40... Transmission/exchange connection table, 41... Transmission/information connection table,
42... Exchange/information connection table, 43... Exchange user route, 44... End user route, 45... Cause-effect correspondence table.

indignation figure 46th sacrifice 1 piece rod % No. vinegar figure <d-n No L tea mouth

Claims (1)

[Claims] 1. A management device that manages transmission networks such as high-speed multiplexers and modems, a management device that manages switching networks such as PBXs and packet switches, and information networks such as computers and terminals. In an integrated network management system consisting of a management device for managing the above-mentioned lower sub-network management devices, a central management device for managing the entire network by connecting to the lower-level sub-network management devices, and the entire set of networks managed by these management devices. , the transmission network management device, switching network management device, and information network management device have a knowledge base of detailed information and connection information of the component devices in these networks, and the central management device has connection information of the component devices of the entire information network. The system has a knowledge base of Distributed fault diagnosis method for information networks featuring features. 2. In the fault diagnosis method according to claim 1, all fault detection information is notified to the central management device from the lower subnetwork management device that has detected the fault occurring in the self-managed network, and the central management device determines the fault from the fault information. A distributed fault diagnosis method for an information network characterized by having a means for roughly specifying a fault occurrence part and instructing a lower subnetwork management device to which the fault occurrence part belongs to perform detailed fault diagnosis. 3. In the fault diagnosis method according to claim 1, a detailed fault diagnosis is always performed in the lower subnetwork management device that detects a fault occurring in the self-managed network, and the fault diagnosis results and information on whether fault diagnosis is possible are managed in an integrated manner. The system notifies the device and at the same time also notifies fault detection information, which is collected by the central management device.The central management device determines the location and cause of the failure based on the collected information.If necessary, the subnetwork management device that cannot diagnose the failure A distributed fault diagnosis method for an information network characterized by having a means for notifying the information network. 4. In the fault diagnosis method according to claim 1, the lower subnetwork management device that detects a fault occurring in its own management network first determines whether or not diagnosis is possible, and if the fault is determined, performs detailed fault diagnosis; The results are notified to the central management device, and if the failure cannot be diagnosed, the central management device is immediately notified, and at the same time, the failure detection information is also notified, and the central management device identifies the location and cause of the failure based on the notification information. A distributed fault diagnosis method for an information network characterized by having means for notifying a subnetwork management device that cannot be diagnosed. 5. In the fault diagnosis method according to claim 2, in the method in which the general network management device uses the fault information from the lower sub-network management device to roughly identify the location where the fault has occurred, Assuming that the line is called a relay line and the subscriber side is called a terminal line, connection information between the terminal sides in the transmission network, connection route information of the relay line, connection information on the terminal side and the relay side in the switching network, Physical connection route information of the terminal line of the switching network based on the connection information on the terminal side and the relay side in the information network, and the connection information between the relay line of different subnetworks and the terminal line at each subnetwork boundary. It is characterized by automatically generating exchange user routes and end user routes, which are physical connection route information for terminal lines in information networks, and estimating the location of failure in the network based on these connection route information and failure information. Distributed fault diagnosis method.