JP2019096944A - Communication network system, path controller, path control method and path control program - Google Patents

Abstract

To provide a communication network system in which routing is carried out based on reliability prediction of the firm ware (hereinafter abbreviated as FW)/hardware (hereinafter abbreviated as HW) of a path controller on a transfer path.SOLUTION: For example, when receiving an inquiry from a path controller 102, an administrative server 200 takes out the score, indicating the prediction results of reliability of FW and HW related to the path controller 102, from the FW information database 201 and the HW information database 202, and returns as a response. When the total reliability score of the scores indicating the own prediction results of reliability of FW and HW in the reception response is less than an evaluation threshold level, the path controller 102 creates routing update information for inhibiting transfer to itself and switching to other path, and transmits to adjacent routing controllers 101, 104, and the routing controllers 101, 104 update the own routing tables 111, 114 on the basis of the routing update information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication network system, a route control apparatus, a route control method, and a route control program, and in particular, a communication network system that performs route selection based on reliability prediction results (in other words, based on failure risk prediction results). The present invention relates to a control device, a route control method, and a route control program.

  In recent years, the number of terminals connected to a communication network system has rapidly increased, and as the communication network system has become complicated, the difficulty in managing network devices such as a route control device (router) has increased. On the other hand, there are many cases where the same device is used for a long time from the viewpoint of cost and maintenance of network devices such as a route control device (router). Also, due to compatibility between firmware versions of network devices such as a route control apparatus (router) or concern about degradation due to version changes, etc., there are many cases where the firmware version is not upgraded and is used as it is. As a result, under the present circumstances, it is not uncommon for devices with a high risk of occurrence of failure or malfunction to be present in the communication network. In the event of a device having a failure or malfunction, it is necessary to change to a path which does not pass through the device as a data transfer path.

  The routing method of the communication network system can be divided into two: static routing and dynamic routing. Static routing requires the network administrator to manually set the route, and it is not always possible to change the route setting immediately. Also, in recent years, with the increase in the number of terminals connected to the communication network system, the scale of the communication network system has become larger, so the routing table is automatically updated, and route selection is performed based on the updated routing table. Dynamic routing to be implemented is widely used. Current dynamic routing methods include a distance vector type that selects a path with a short distance to a destination, and a link state type that determines a path from the cost of an interface. In dynamic routing, it is possible to confirm the existence of an adjacent device, change the communication path automatically when a failure or malfunction is detected, and change the path not passing through the adjacent device.

  However, in the case of the current routing method, regardless of static routing or dynamic routing, since the route change is performed for the first time after occurrence of an abnormality in a network device such as a route control device (that is, a router), communication becomes unstable. It is easy to become. It is necessary to change the route before a failure or malfunction occurs.

  For this reason, in order to make the operation in consideration of the inherent risk of failure, for example, in Japanese Patent Laid-Open No. 2006-14032 "route determination method and route setup device" A technology has been proposed in which route selection is performed by grasping the risk of failure of the network device by focusing attention on the length of operation time.

Japanese Patent Application Publication No. 2006-14032

  In the current technology as described in Patent Document 1, as described above, attention is focused only on the operation time of the route control device (router etc.), and a comparison result between the operation time and the average failure interval It is decided to predict the occurrence. However, in the current path control device, the firmware to be mounted is also increasing in scale with the diversification of functions, and the amount of use of memory and the like is also increasing. Therefore, failure of the path control device including firmware and hardware And the appearance of malfunction and so on are also diversified and complicated. Therefore, as in the current technology, there are many cases in which the prediction of the decrease in reliability such as failure or malfunction of the routing control device based on only the operation time of the hardware is not actually in line.

(Object of the present invention)
The present invention has been made in view of the circumstances as described above, and it is a communication that controls route selection based on prediction results of the reliability of firmware and hardware relating to a route control device disposed on each transfer route. An object of the present invention is to provide a network system, a route control apparatus, a route control method, and a route control program.

  In order to solve the above-mentioned problems, the communication network system, the route control device, the route control method and the route control program according to the present invention mainly adopt the following characteristic configurations.

(1) The communication network system according to the present invention
In a communication network system including a route control device that selects a transfer route and controls data transfer operation by the selected transfer route, and a management server that manages each of the route control devices that exist within a management range.
The management server is
A firmware information database storing points obtained by digitizing the prediction results of the reliability of the firmware related to each of the route control devices existing within the management range;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware related to each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the score obtained by quantifying the prediction result of the reliability of the firmware regarding the corresponding routing control device is extracted from the firmware information database, and the hardware information database is applicable. And response means for taking out a score obtained by digitizing the prediction result of the reliability of the hardware related to the routing control device, and returning it to the routing control device of the inquiry source as a response to the reliability inquiry.
And the routing control device
Query means for sending to the management server the reliability query for inquiring a score obtained by quantifying the prediction result of its own reliability, and for receiving a response to the reliability query from the management server;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Means for transmitting to the route control device;
And updating means for updating its own routing table based on the routing update information when the routing update information is received from the adjacent route control device adjacent to the own device.

(2) The routing control device according to the present invention
In a communication network system including a management server that manages each device present in a management range, the route control device selects a transfer route and controls data transfer operation by the selected transfer route, and exists in the management range A firmware information database storing points obtained by quantifying the prediction results of the reliability of the firmware regarding each of the devices;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware regarding each of the devices existing within the management range;
When receiving a reliability inquiry from the device, the hardware information about the device is extracted from the hardware information database as well as the score obtained by quantifying the prediction result of the reliability of the device regarding the device from the firmware information database A response unit for taking out a score obtained by digitizing the prediction result of the reliability of the server and returning the result to the device as the inquiry source as a response to the reliability inquiry.
Inquiry means for transmitting the reliability inquiry for inquiring a score obtained by quantifying the prediction result of the own reliability, and for receiving a response to the reliability inquiry from the management server;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Means for transmitting to the route control device;
And updating means for updating its own routing table based on the routing update information when the routing update information is received from the adjacent route control device adjacent to the own device.

(3) The route control method according to the present invention is
In a communication network system including a route control device that selects a transfer route and controls data transfer operation by the selected transfer route, and a management server that manages each of the route control devices that exist within a management range, each of the transfer routes A route control method for selecting the transfer route according to the prediction result of the reliability of the route control device disposed on the upper side,
The management server is
A firmware information database storing points obtained by digitizing the prediction results of the reliability of the firmware related to each of the route control devices existing within the management range;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware related to each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the score obtained by quantifying the prediction result of the reliability of the firmware regarding the corresponding routing control device is extracted from the firmware information database, and the hardware information database is applicable. And outputting a score obtained by digitizing the prediction result of the reliability of the hardware related to the routing control device, and returning it to the routing control device as the query source as a response to the reliability query.
And the routing control device
Sending a query to the management server to query the reliability server for inquiring a score obtained by quantifying the prediction result of the reliability of itself, and receiving from the management server a response to the reliability query;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Sending to the routing controller;
And updating the own routing table based on the routing update information when the routing update information is received from the adjacent routing control device adjacent to the own device. .

(4) The routing control program according to the present invention is
In a communication network system including a route control device that selects a transfer route and controls data transfer operation by the selected transfer route, and a management server that manages each of the route control devices that exist within a management range, each of the transfer routes A path control program that causes a computer to execute processing of selecting the transfer path according to the prediction result of the reliability of the path control device disposed on the upper side,
The management server is
A firmware information database storing points obtained by digitizing the prediction results of the reliability of the firmware related to each of the route control devices existing within the management range;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware related to each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the score obtained by quantifying the prediction result of the reliability of the firmware regarding the corresponding routing control device is extracted from the firmware information database, and the hardware information database is applicable. Response processing for taking out a score obtained by digitizing the prediction result of the reliability of the hardware related to the routing control device, and returning it to the routing control device as the query source as a response to the reliability query.
And the routing control device
Query processing of transmitting the reliability query inquiring the score obtained by quantifying the prediction result of its own reliability to the management server, and receiving a response to the reliability query from the management server;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Processing to transmit to the route control device;
When the routing update information is received from the adjacent route control device adjacent to itself, it has an update process of updating its own routing table based on the routing update information. .

  According to the communication network system, the route control device, the route control method, and the route control program of the present invention, the following effects can be mainly obtained.

  That is, in the present invention, each of the route control devices calculates the overall reliability score which is obtained by quantifying the prediction result of the reliability regarding its own firmware and hardware, and the reliability score is lowered, causing failure or operation. It predicts whether or not there is a risk that a failure may occur, and based on the result, it sends routing update information to prompt a route change to the adjacent route control device to update the routing table. Since the request is made, stable communication can be performed by changing the route before a situation such as failure or malfunction occurs.

FIG. 1 is a network configuration diagram showing an example of a network configuration of a communication network system according to a first embodiment of the present invention. 8 is a table showing an example (A) of a firmware information database provided in the management server shown in FIG. 1 and an example (B) of a scoring method when evaluating the prediction result of the reliability of the firmware version. It is a table showing an example (A) of an example of a hardware information database provided in the management server shown in FIG. 1 and an example (B) of a scoring method at the time of point evaluation of prediction results of reliability of hardware. It is a flowchart for demonstrating an example of operation | movement of the communication network system shown in FIG. It is a schematic diagram which shows typically an example of the reliability inquiry about the own reliability from a route control apparatus to a management server, and the response regarding the reliability to the inquiry source from the management server with respect to this reliability inquiry. It is a network block diagram which shows an example of the network configuration of the communication network system which concerns on the 3rd Embodiment of this invention.

  Hereinafter, preferred embodiments of a communication network system, a route control device, a route control method, and a route control program according to the present invention will be described with reference to the attached drawings. In the following description, the communication network system, route control device and route control method according to the present invention will be described, but such route control method may be implemented as a route control program that can be executed by a computer. Alternatively, it goes without saying that the route control program may be recorded on a computer readable recording medium. Further, reference numerals in the drawings attached to the following drawings are for convenience added to the respective elements as an example for aiding understanding, and it is needless to say that the present invention is not intended to be limited to the illustrated embodiment. Yes.

(Features of the present invention)
Before describing the embodiments of the present invention, the features of the present invention will first be outlined. According to the present invention, reliability prediction (that is, prediction of occurrence of failure or malfunction) of a route control device on a packet transfer path is based on an overall prediction result of the reliability of the firmware of the device and the reliability of the hardware. The main feature is to minimize the occurrence of failures by judging and reflecting it in route selection.

  To explain further, in the communication network system according to the present invention, among the plurality of routes formed by the plurality of route control devices (network devices such as routers), the route control device predicted to have high reliability is arranged A firmware information database that holds the points obtained by digitizing the prediction results of the reliability of the firmware of each routing control device in order to select the route having priority, and the prediction results of the reliability of the hardware of each routing control device The main feature is that it is configured to include a management server having a hardware information database that holds the standardized scores.

  As for path control, it is possible to realize path change in the communication network by operating the parameters of a general dynamic routing protocol, but in the case of a communication network system that does not use the dynamic routing protocol Also exist. In order to cope with such a case, in the present invention, in the management server, with respect to each of the route control devices, the overall reliability is a value obtained by digitizing the prediction results of the reliability of the firmware and hardware. Calculated as the prediction result (ie, the overall reliability score), and based on the calculated overall reliability score, for route selection relating to each of the routing control devices so that the routing control device with high reliability is preferentially used. Implementing route control in a communication network by obtaining and setting config information (configuration information) for each route control device is also one of the main features.

First Embodiment of the Present Invention
Next, a first embodiment of a route control device according to the present invention will be described with reference to the drawings. In the first embodiment, when there are a plurality of transfer routes via a plurality of route control devices (network devices such as routers), the prediction result of the reliability of the route control device on each transfer route is considered. The case of performing route selection will be described.

  In the communication network system according to the first embodiment, among the plurality of transfer routes formed by a plurality of route control devices (network devices such as a router), the route control device predicted to have high reliability is used. A firmware information database holding a score obtained by quantifying the prediction result of the reliability of the firmware of each route control device in order to select preferentially the arranged route, and the prediction of the reliability of the hardware of each route control device It comprises and comprises a management server having a hardware information database for holding the score obtained by digitizing the result.

  Here, in the firmware information database, for example, a known defect or recommended level or operation record of a firmware vendor for each type and version of firmware used in each route control device existing within the management range of the management server. The score obtained by quantifying the result of the prediction of the reliability degree is stored and managed. Also, in the hardware information database, for each route control device existing within the management range of the management server, the result of predicting the reliability based on the type (cause) of the failure that occurred in the past, the number of occurrences, etc. In some cases, in addition, fixed points such as mean time between failures (MTBF: Mean Time Between Failure) and upper limit value of available memory (upper limit value of memory usage rate) may be stored. Device information is also stored and managed.

  When there is a reliability inquiry regarding the number of points indicating prediction of its own reliability from the route control device that constitutes a data transfer path, the management server receives firmware as a prediction result of the reliability of the inquiry source route control device. In some cases, fixed device information (average failure interval and availability available) of each routing device that holds the prediction result of the reliability and the reliability of the hardware numerically and, in some cases, fixedly The device information of the corresponding route control device is also included from the memory upper limit value etc., and the response is made to each route control device of the inquiry source.

  Then, each path control device that receives the response from the management server further predicts the reliability of the hardware based on the device information when the fixed device information of its own is included in the response. And the score obtained by quantifying the prediction result of the obtained hardware, and the score obtained by quantifying the prediction result of the reliability of the firmware and the reliability of the hardware included in the response from the management server Calculate the score of the prediction result of the comprehensive self-reliability (that is, the total reliability score). Then, when it is predicted that its own reliability is a low value as a result of the prediction of the overall reliability, the data transfer to the other routing control apparatus is suppressed with respect to the other routing control devices, Distributes routing update information that prompts switching to a forwarding route.

  As described above, in the first embodiment, the overall reliability is obtained by taking into consideration the numerical results of the prediction results of the reliability of the firmware of the target route control device and the reliability of the hardware. Since the route selection is performed using the prediction result (ie, the total reliability score), it is possible to make an overall judgment on the route selection.

That is, in the first embodiment,
Assuming that a failure or failure in the transfer route = a failure or malfunction of the route control device during communication, the prediction result of the transfer route, that is, the reliability of the route control device (the difficulty of failure or failure) is quantified. , For each transfer path, that is, for each route control device during communication, it is compared with a predetermined evaluation threshold. And by minimizing the occurrence of failures and abnormalities on the transfer route, by performing route selection so as to avoid devices with low evaluation of reliability prediction results (devices that may be prone to failure or malfunction). Is realized. Here, as a parameter for determining a failure or malfunction of the route control device, for example, a known failure of a firmware or a manufacturer recommended level, a type of failure of the device, the number of failure occurrences, etc. are used. In order to further improve the prediction accuracy, also uses information that fluctuates in real time, such as cumulative operation time, memory usage rate, and packet loss rate.

(Example of Configuration of First Embodiment)
FIG. 1 is a network configuration diagram showing an example of a network configuration of a communication network system according to a first embodiment of the present invention. The communication network system shown in FIG. 1 includes a management server 200 that manages each path control device (network device such as a router) within the management range, and as each path control device, for example, path control device 101 to path The configuration includes five path control devices of the control device 105. Further, as an example of the configuration, dynamic routing is applied as a routing protocol to transmit / receive data between the transmitting terminal 300 and the receiving terminal 400 via each path control device. Although the management server 200 is connected to the route control device 101, it applies dynamic routing as a routing protocol to transmit and receive data to and from each of the target route control devices 101 to 105. It is also possible to do.

  The routing control device 101 to the routing control device 105 shown in FIG. 1 are internally provided with the routing table 111 to the routing table 115, the hardware reliability calculation unit 121 to the hardware reliability calculation unit 125, and the transmission and reception processing unit 131 to transmission and reception processing. At least the unit 135 is provided. Each of the route control device 101 to the route control device 105 is a score and numerical value of fixed device information (for example, average failure interval, availability, etc.) that numerically predicts the prediction result of its own reliability transmitted from the management server 200 according to the dynamic protocol. Has a function of receiving a large memory upper limit value (upper limit value of memory usage rate) and the like. When each of the hardware reliability calculation unit 121 to the hardware reliability calculation unit 125 receives the fixed device information of the own from the management server 200, based on the device information, the reliability on the own hardware is calculated. A function to calculate points obtained by digitizing the prediction result of the degree, and a function to further add the calculated points to the points received from the management server 200 and combine them comprehensively (for example, a function to simply add Or a function of weighting and adding using an appropriate coefficient, and the like.

  Furthermore, each of the route control devices 101 to 105 is a score obtained by digitizing the prediction result of the reliability regarding its own firmware and hardware received from the management server 200, and in some cases, based on the device information. Including the score obtained by digitizing the prediction result of the reliability of the own hardware calculated additionally and determining whether or not the integrated total reliability score is reduced to a value less than a predetermined evaluation threshold value Have a function to Then, when the total reliability score is lowered to a value less than the evaluation threshold value, the routing update information is generated which urges switching to another transfer path by suppressing data transfer to the self, and It has a function to transmit to the adjacent route control device which is adjacent by the neighbor communication. Further, it also has a function of updating each of the routing table 111 to the routing table 115 based on the routing update information transmitted by the neighbor communication with the adjacent route control device according to the dynamic routing protocol.

  Further, the transmission / reception processing unit 131 to the transmission / reception processing unit 135 provided in each of the route control device 101 to the route control device 105 transmit the reliability inquiry to the management server 200 and receive the response from the management server 200. In addition to having as a query means, it also has a function of performing route selection taking into consideration the prediction results of the reliability of each transfer route with reference to the respective routing tables 111 to 115, and transmitting and receiving data. ing.

  Further, the management server 200 illustrated in FIG. 1 includes a score obtained by digitizing the prediction result of the reliability of the firmware of each of the route control devices 101 to 105 and a score obtained by quantifying the prediction result of the reliability of the hardware. It is a server that manages information. The management server 200 internally includes at least a firmware information database 201, a hardware information database 202, a reliability calculation unit 203, and a transmission / reception processing unit 204.

  Then, the management server 200, as the firmware information database 201, for each version of firmware of each of the route control devices 101 to 105, for example, firmware information as shown in FIG. 2 and prediction results of reliability based on the firmware information And the score obtained by digitizing. Also, the management server 200 quantifies, as the hardware information database 202, the prediction results of the reliability calculated based on, for example, the failure history as shown in FIG. 3 for each of the route control devices 101 to 105. Although not shown, fixed device information (for example, the average failure interval, the upper limit value of the usable memory usage rate, the limit value of the packet loss rate, etc.) is held in addition to the scores.

  Further, the reliability calculation unit 203 calculates a score obtained by digitizing the prediction result of the reliability regarding each of the route control devices 101 to 105, and stores the calculated score in the firmware information database 201 and the hardware information database 202. Mean fixed time between failures (MTBF) as fixed device information of each of the route control devices 101 to 105, or an upper limit value of available memory usage rates input from the administrator It also has the function of receiving and holding the limit value of the packet loss rate and the like. Further, the transmission / reception processing unit 204 has a function of exchanging data with each of the route control devices 101 to 105, and has a function of receiving a reliability inquiry from each of the route control devices 101 to 105. In addition to having as a query receiving means, it also has a function of returning a response to the reliability query to each of the route control devices 101 to 105 as a response means.

  FIG. 2 is a table showing an example of the firmware information database 201 provided in the management server 200 shown in FIG. As shown in FIG. 2A, the firmware information database 201 is a firmware version 201a indicating the version of firmware installed in each of the route control devices 101 to 105, and the prediction result of the reliability in each firmware version And a point 201b indicating the point obtained by digitizing. As shown in FIG. 2A, the larger the version number in the firmware version 201a column is, that is, the newer the version is, the larger the score shown in the score 201b column is, that is, the score indicating the prediction result of the reliability of the firmware. Is high. Although FIG. 2A describes only classification according to the firmware version, depending on the case, classification may also be performed in a format further including the type of firmware.

  Further, FIG. 2B shows an example of a scoring method when evaluating the prediction result of the reliability of the firmware version, and, for example, the degree of severity for each type of known defect of the firmware. The case where the evaluation is made on the basis of a known defect 201c indicating a and a vendor recommended level 201d indicating a recommended level of the firmware by a firmware vendor is illustrated. That is, for example, as shown in the known defect 201c, the larger the number indicating the degree of severity, the larger the numerical value for deducting the point indicating the prediction result of the degree of reliability.

  Also, as shown in the vendor recommendation level 201d, the higher the firmware vendor's recommended level is, the less the points are deducted. For example, if the firmware vendor's recommended level is "recommended", the score deduction is "0", but if the level is "stable function", the score deduction is "-10" and "new" In the case of the function addition level, the point deduction of the score is “−20”, and in the case of the “deprecated” level, the point deduction of the score is “−40”.

  FIG. 3 is a table showing an example of the hardware information database 202 provided in the management server 200 shown in FIG. As shown in FIG. 3A, the hardware information database 202 includes hardware in each of the route control devices 202a indicating each of the route control devices 101 to 105 and the route control devices 101 to 105. The number of failures 202b indicates the number of occurrences of failure, and the score 202c indicates the number of numerical results of reliability prediction results according to the type of failure at each failure.

  As shown in FIG. 3A, as the number of failures of the hardware in the failure number column 202b becomes larger, the score indicated in the number 202c column becomes smaller, that is, the prediction result of the reliability of the hardware becomes lower. There is. For example, as exemplified in the point 202c column of FIG. 3A, evaluation of the prediction result of the reliability regarding the hardware of the route control apparatus 101 whose value of the failure number 202b is “0” is not deducted. The evaluation of the prediction result of the reliability regarding the hardware of the routing control apparatus 102 whose value of the failure count 202b is “100” but is “100” is greatly reduced to “40”.

  Note that FIG. 3B shows an example of a scoring method when evaluating the prediction result of the reliability of the hardware, for example, the type of hardware failure 202 d and the type of hardware failure. In the case of evaluation based on the deduction points / times 202e indicating the degree of severity of each occurrence for. That is, as shown in the type of hardware failure 202d, it indicates that the larger the severity of the type of failure that occurred per time, the larger the numerical value for deducting the points. For example, in the case where the type of hardware failure is a minor failure having a “FRU (Field-Replaceable Unit) replacement”, as shown in the point / time 202e, Although the deduction point of the score per time is "-5", in the case of "an unknown obstacle", the deduction point of the score per time is an example which becomes large with "-40".

  However, the scoring method shown in FIG. 2 (B) and FIG. 3 (B) is merely an example in the present invention, and the points to be deducted are changed and set to arbitrary values. Alternatively, the classification of the severity of the failure of the firmware may be arbitrarily changed, or the type of failure of the hardware may be changed to any classification, and in some cases, as shown in FIG. (B) It is also possible to change to arbitrary scoring methods based on evaluations other than FIG. 3 (B).

(Description of Operation of First Embodiment)
Next, operations related to the route control devices 101 to 105 of the communication network system shown in FIG. 1 and the management server 200 will be described. First, when the power is turned on, each of the route control apparatuses 101 to 105 creates the routing table 111 to the routing table 115 using dynamic routing as an initial setting. After that, each of the route control devices 101 to 105 periodically attaches the version information of the firmware used by itself at a predetermined cycle, and relates to the reliability and hardware related to its own firmware. The operation of transmitting to the management server 200 the reliability query inquiring the prediction result of the reliability is repeated.

  The management server 200 that has received the reliability inquiry searches the firmware information database 201 based on the version information of the firmware received from the inquiry source, and any one of the routing control apparatus 101 to the routing control apparatus 105 of the inquiry source. Obtain the score obtained by quantifying the prediction result of the reliability regarding the firmware, and search the hardware information database 202 to obtain the reliability regarding the hardware of any of the routing control apparatus 101 to the routing control apparatus 105 of the inquiry source. Get the score which quantified the prediction result. Furthermore, further calculation of hardware reliability prediction such as mean time between failures (MTBF: Mean Time Between Failure) of hardware of any of the route control apparatuses 101 to 105 of the query source and available memory upper limit value It also retrieves fixed device information required for Then, the prediction result of the reliability regarding the taken out firmware and hardware is returned to each of the route control devices 101 to 105 of the inquiry source in a form including the device information as well as the score obtained by digitizing.

  Here, the average failure interval of each of the route control apparatus 101 to the route control apparatus 105 is calculated when the history of occurrence of failure is collected by the management server 200, and is saved in the hardware information database 202 of the management server 200. Shall be stored in Further, it is assumed that the upper limit of usable memory for each of the path control devices 101 to 105 is registered in advance in the storage area in the hardware information database 202 of the management server 200. The score obtained by digitizing the prediction result of the reliability of the firmware and the score obtained by digitizing the prediction result of the reliability of the hardware may be, for example, the scoring method as described above in FIGS. 2B and 3B. As described above, the value of the point to be deducted and the type of defect or fault to be deducted may be changed from FIG. 2 (B) or FIG. 3 (B).

  Each of the routing control apparatus 101 to the routing control apparatus 105 at the inquiry source is a score obtained by digitizing the prediction result of the reliability of its own firmware from the management server 200, and a score obtained by quantifying the prediction result of the reliability of the hardware. If you receive device information such as your own mean time between failures and available memory limits to make real-time predictions of your hardware's reliability, then you can add further to your real-time reliability of your hardware. In order to obtain a score obtained by quantifying the predicted result, the hardware reliability calculation unit 121 to the hardware reliability calculation unit 125 each use the device information returned from the management server 200 to calculate the prediction result of the reliability. Calculate the quantified score.

  For example, the accumulated operating time continuing to its present time is taken out and compared with its own average failure interval returned from the management server 200. If the accumulated operation time is longer than the average failure interval, the reliability score is deducted in accordance with the exceeded degree, assuming that the risk of occurrence of failure is increased. Set to a low score. In addition, the current memory usage rate of itself is taken out and compared with the upper limit value of available memory (upper limit value of memory usage rate) of its own returned from the management server 200. If the memory usage rate exceeds the available memory upper limit value, the reliability score is deducted in accordance with the exceeding degree, assuming that the risk of occurrence of an operation failure is increasing. Set to a low score.

  Each of the route control device 101 to the route control device 105 has the reliability score of the firmware returned from the management server 200, the reliability score of the returned hardware, and the hardware reliability calculation unit 121 to the hardware. The overall reliability prediction evaluation result that integrates the reliability score of its own hardware based on the current accumulated operating time and the memory usage rate calculated in real time in each of the hardware reliability calculation units 125 as the overall reliability score Acquire and use for route selection as part of routing information. Here, when acquiring the overall reliability score, for example, each score may be simply added and acquired, or may be acquired by weighting using an appropriate coefficient and adding It is.

  Each of the route control devices 101 to 105 periodically repeats the operation of recalculating the score (total reliability score) obtained by digitizing the prediction result of the reliability at a predetermined cycle. Then, when the score (total reliability score) obtained by quantifying the prediction result of the reliability recovers from a value less than a predetermined evaluation threshold to a value equal to or more than the evaluation threshold, the cost related to route selection is made the original value. Perform an operation to return. On the other hand, if the score (total reliability score) obtained by digitizing the prediction result of the reliability continues for a predetermined number of times threshold value, the device failure or operation failure occurs if the value is lower than the evaluation threshold. Notify the administrator of the alarm on the assumption that the possibility of the

  Next, the operation of the communication network system shown in FIG. 1 will be described in more detail with reference to the flowchart of FIG. 4 and the schematic diagram of FIG. FIG. 4 is a flowchart for explaining an example of the operation of the communication network system shown in FIG.

  After the management server 200 is powered on and started (step S1), when the power of each of the route control devices 101 to 105 is turned on (step S2), each of the route control devices 101 to 105 , And establish a neighbor connection with the adjacent route control device using dynamic routing, and create its own routing table 111 to routing table 115 (step S3).

  After that, each of the route control device 101 to the route control device 105 sends, to the management server 200, the reliability regarding the firmware and hardware running on its own device, and its own device information (that is, the average failure interval and use). A response as shown in FIG. 5 is received from the management server 200 of the inquiry destination by inquiring with the possible memory upper limit value etc.) (step S4). From then on, each of the route control devices 101 to 105 periodically repeats the operation of receiving an inquiry to the management server 200 and a response from the management server 200 at a predetermined cycle, and updates the latest from the management server 200. It works to get the information of. Further, FIG. 5 shows an example of the reliability inquiry regarding the reliability of the route control apparatus 101 to the management server 200 from the route control apparatus 105 to the management server 200 and the response regarding the reliability from the management server 200 to the inquiry source in response to the reliability inquiry. Is a schematic view schematically showing.

  As shown in FIG. 5, the reliability inquiry regarding the reliability of itself from the routing control device 101 to the routing control device 105 (the prediction result of the reliability regarding firmware and hardware and the device information (average failure interval, use) The inquiry of the possible upper limit of the memory etc.) includes the information of the product ID 501 specifying the route control device itself of the inquiry source and the firmware version information 502 operating in the own device. In addition, in response to the inquiry source from the management server 200, each information such as the firmware reliability 503, the hardware reliability 504, the average failure interval 505, the available memory upper limit value 506, etc. regarding the route control device of the inquiry source is at least It contains.

  Each of the route control device 101 to the route control device 105 is based on the device information (average failure interval 505, available memory upper limit 506) received from the management server 200 of the inquiry destination, the hardware reliability calculation unit 121 to hardware In each of the reliability calculation units 125, a score obtained by digitizing the prediction result of the reliability regarding the hardware is further added and calculated (step S5).

  Here, with regard to the score regarding the reliability of the hardware additionally calculated based on the device information, as described above, the cumulative operating time continued to the present of the own is an average of the own returned from the management server 200. When the time is longer than the failure interval, the reliability prediction result is quantified according to the degree of exceeding the average failure interval, on the assumption that the risk of failure occurrence is increasing. Set the score to a lower score by deducting the score. If the current memory usage rate exceeds the upper limit of available memory returned from the management server 200, it is considered that the risk of occurrence of failure is increased. According to the degree of exceeding the memory upper limit value, the score obtained by quantifying the prediction result of the reliability is deducted and set to a low score.

  After that, each of the routing control device 101 to the routing control device 105 is a score obtained by quantifying the prediction result of the reliability of the firmware returned from the management server 200, a score obtained by quantifying the prediction result of the reliability of the hardware, Also, a score obtained by quantifying the prediction result of the reliability of the own hardware based on the current accumulated operating time and the memory usage rate calculated in each of the hardware reliability calculation unit 121 to the hardware reliability calculation unit 125 is summarized. An overall reliability prediction evaluation result, that is, an overall reliability score is determined.

  As a result, for example, when the overall reliability prediction evaluation result of the user, ie, the total reliability score, is lower than a predetermined evaluation threshold, it is predicted that the reliability is lowered, and a failure or operation is caused. Assuming that the risk of failure has increased, routing update information including the total reliability score is created. Then, the created routing update information is transmitted to the adjacent route control device as a neighbor, and the routing table is requested to be updated (step S6).

  For example, in the case of the route control device 102, as shown in FIG. 1, the adjacent route control devices are the route control device 101 and the route control device 104. Therefore, each of adjacent route control device 101 and route control device 104 receives not only the information of current routing table 111 and routing table 114 but also the routing update information including the overall reliability score from adjacent route control device 102. The received overall reliability score is also reflected in route selection in the form of being used as a part of information for route selection.

  Then, for example, when the total reliability score of the route control apparatus 102 is lower than a predetermined evaluation threshold, the adjacent route control apparatus 101 and the route control apparatus 104 are directed to the route control apparatus 102. The routing table 111 and the routing table 114 are updated to contents which suppress the route selection of and switch to another transfer route,

  Thereafter, when a predetermined fixed time has elapsed (step S7), the process returns to step S4, and each of the route control devices 101 to 105 periodically sends a request to the management server 200 at a predetermined cycle. The operation of inquiring the prediction result of the reliability and the operation of recalculating the score of the reliability on each hardware are repeated. Then, when the calculated total reliability score is recovered to a value equal to or more than a predetermined evaluation threshold, the cost for the route selection is returned to the original value. That is, routing update information for prompting restoration to the original state where forwarding to itself is possible is transmitted to the adjacent route control device as a neighbor, and a request is made to update the routing table so as to restore the original value. On the other hand, if the total reliability score is a low value less than the evaluation threshold continuously during the predetermined number of times threshold, the alarm is managed on the assumption that a device failure or malfunction has occurred. Notify the person.

  In the above description, each of the route control device 101 to the route control device 105 is provided with the hardware reliability calculation unit 121 to the hardware reliability calculation unit 125, and a response from the management server 200 to an inquiry regarding its own reliability. The case has been described in which additional points are calculated by digitizing the prediction result of the reliability of the own hardware based on the own device information (average failure interval, upper limit of available memory, etc.) included in.

  However, the present invention is not limited to such a case. For example, instead of providing the hardware reliability calculation unit 121 to the hardware reliability calculation unit 125 having such a function in each of the route control apparatus 101 to the route control apparatus 105, it may be provided on the management server 200 side. good. That is, in addition to the firmware version of the device itself, the cumulative operation time up to the present time and the memory usage rate are additionally included as a reliability inquiry from each of the route control device 101 to the route control device 105. Then, the score obtained as a result of comparison with the average failure interval and the available memory upper limit value on the management server 200 side is also included in the score obtained by quantifying the prediction result of the reliability regarding the hardware and returned to the inquiry source You may

(Description of the effect of the first embodiment)
As described above in detail, in the first embodiment, the following effects can be obtained.

  That is, each of the route control apparatus 101 to the route control apparatus 105 periodically calculates an overall reliability score that is obtained by quantifying the prediction result of the reliability regarding its own firmware and hardware, and the reliability score decreases. Sending a routing update information prompting a route change to the adjacent route control device in anticipation of a dangerous condition in which a failure or malfunction may occur, and requesting a routing table update Therefore, stable communication can be performed by changing the path before a failure or malfunction occurs.

  In addition, since each of the route control devices 101 to 105 regularly carries out the evaluation based on the overall reliability score, it is possible to reliably overlook the route control device in the dangerous state in which the overall reliability score is lowered. It can be prevented. Furthermore, since it is only necessary to target the transfer operation to the transfer route in which there is a dangerous state of the route control device whose overall reliability score has become low as the target of routing update, it is necessary to cope with the minimum necessary load. Is possible.

  In addition, by extracting the path control device in a dangerous state in which the total reliability score is lowered, it is possible to optimize the firmware change time and the replacement time of the path control device itself.

  Also, by listing the prediction results of the reliability of each of the route control devices 101 to 105 managed by the management server 200, the maintenance schedule is prioritized from the device with the low evaluation of the prediction result of the reliability. Maintenance work can be performed, and it is possible to more reliably avoid the occurrence of a failure or malfunction of the entire communication network system.

Second Embodiment of the Present Invention
In the first embodiment described above, the result of calculating the overall reliability score integrated with the scores of the prediction results of the reliability of the firmware and hardware of each routing control device (that is, each router etc.) is reflected. The routing update information is distributed to the adjacent route control devices according to the routing protocol, and in each adjacent route control device, the case where the route selection is changed based on the distributed routing update information has been described. However, there are network devices such as layer 2 switches and modems that do not have a routing protocol and can not understand the routing protocol itself. In the second embodiment, with regard to a route selection device and a line service that do not use such a routing protocol, the reliability is predicted, and a route related to the predicted reliability, that is, a total reliability score. The case where it is possible to apply the selection will be described.

  That is, in the second embodiment, the reliability inquiry to the management server 200 from the routing control device not using the routing protocol such as the layer 2 switch or the modem or the prediction of the reliability to the inquiry source from the management server 200 A configuration in which the management server 200 has a function that enables the exchange of responses including the numbers obtained by digitizing the results, using various protocols and user interfaces used by the corresponding route control device. Do. As in the third embodiment to be described later, even when dynamic routing is not set, various protocols used by the corresponding route control apparatus are similarly used for exchanging the reliability inquiry and the response. Or using a user interface.

  Here, examples of the various protocols used for reliability inquiry and response include SNMP (Simple Network Management Protocol), LLDP (Link Layer Discovery Protocol), Ethernet OAM (Operations, Administration, Maintenance for Ethernet), NETCONF (Network) Configuration Protocol), OpenFlow, etc. are assumed. Further, as the user interface used for the reliability inquiry and response, for example, CLI (Command Line Interface), Web UI (Web User Interface), etc. are assumed.

Third Embodiment of the Present Invention
In the first embodiment described above, the case where dynamic routing is applied as the routing method has been described, but in the third embodiment, the case where dynamic routing is not set will be described. That is, in the third embodiment, in order to be able to cope with the case where dynamic routing is not set as the routing method, the management server calculates the score obtained by digitizing the prediction result of the reliability of each routing control device. After calculating together and calculating as a total reliability score, for each routing control device, using the calculated total reliability score, a route selection for preferentially selecting a route with high reliability for each transfer destination is selected. Yes, there is a function to deliver the route selection result obtained as a result to each path control device via the directly connected path control device as config information (configuration information: routing information for path selection) doing.

  On the other hand, each route control device has a function of storing config information (configuration information) about itself sent from the management server in the config table, selecting a route according to the config table, and transmitting / receiving data. There is.

  The route selection operation in the third embodiment will be described below using the network configuration diagram of FIG. 6 showing a specific configuration example. FIG. 6 is a network configuration diagram showing an example of a network configuration of a communication network system according to a third embodiment of the present invention. In the case of the communication network system of FIG. 6, as described above, since dynamic routing is not set as the routing method, the route selection information of each of the route control devices 101A to 105A is created in the management server 200A. , Config information (configuration information) is sequentially transferred according to a route fixedly set in advance via the route control device 101A directly connected, to each of the route control devices 101A to 105A. Distributed. In FIG. 6, the blocks having the same functions as those of the network configuration of FIG. 1 shown as the first embodiment are indicated by the same reference numerals as those of FIG. Do.

  The path control device 101A to the path control device 105A shown in FIG. 6 internally include a transmission / reception processing unit 131A to a transmission / reception processing unit 135A, a config table 141 to a config table 145, firmware information 151 to firmware information 155, and hardware information 161 to Hardware information 165 is at least provided. Each of the route control devices 101 to 105 receives its own config information (configuration information) transferred sequentially from the management server 200A via the route control device 101A, and transmits each of the config tables 141 to config table 145. It has a function to set. The transmission / reception processing unit 131A to the transmission / reception processing unit 135A each have a function of transmitting and receiving data using a route designated as a selected route with reference to the config table 141 to the config table 145, respectively.

  Also, the firmware information 151 to the firmware information 155, and the hardware information 161 to the hardware information 165 are transmitted to the management server 200A to calculate the score obtained by digitizing the prediction result of the reliability of itself. Holds the necessary information. For example, the firmware information 151 to firmware information 155 hold version information of the firmware used by itself, and the hardware information 161 to hardware information 165 indicate adjacent device information indicating the adjacent route control device of itself And current device information such as current memory usage rate, accumulated operating time up to now, current packet loss rate, etc. are held. Then, when transmitting the reliability inquiry to the management server 200A in order to acquire the config information (configuration information) corresponding to the score obtained by digitizing the prediction result of the reliability of itself, the firmware information 151 to the firmware The information 155 and the hardware information 161 to the hardware information 165 are transmitted in a form including the information held therein.

  Further, the management server 200A shown in FIG. 6 calculates config information (configuration information) for selecting each route and distributes it to the inquiry source in response to the reliability inquiry from each of the route control devices 101A to 105A. Server. The management server 200A internally includes at least a reliability calculation unit 203A, a topology map generation unit 205, and a config generation unit 206 in addition to the firmware information database 201, the hardware information database 202, and the transmission / reception processing unit 204. .

  Here, since the firmware information database 201, the hardware information database 202, and the transmission / reception processing unit 204 are completely the same as the management server 200 of FIG. 1, duplicate descriptions will be omitted here. However, in the case of FIG. 6, since the dynamic routing is not set, after the transmission / reception processing unit 204 transmits / receives to / from the directly connected route control apparatus 101A, the connection route fixedly set in advance thereafter. It becomes an operation of sequentially tracing and transferring.

  In addition to the function of the reliability calculation unit 203 of the management server 200 of FIG. 1 (calculation of average failure interval and setting function of available memory upper limit, etc.), the reliability calculation unit 203A further performs each path control. When the reliability inquiry from the device 101A to the route control device 105A includes the current device information (cumulative operation time, memory usage rate, etc.), the current device information is used to trust the respective hardware. It also has a function to calculate by adding the score obtained by digitizing the prediction result of degree.

  In addition, the topology map creation unit 205 creates a topology diagram showing the connection state of the entire network within the management range, based on the adjacent device information included in the inquiry from each of the route control devices 101A to 105A. It has a function to hold. Further, the config creating unit 206 first estimates the information stored in the firmware information database 201 and the hardware information database 202 (the prediction results of the reliability regarding the firmware and hardware of each of the route control devices 101A to 105A). Information related to the converted points) and, in some cases, a point obtained by quantifying the prediction result of the reliability of each of the routing control device 101A to the routing control device 105A additionally calculated by the reliability calculation unit 203A To calculate the overall reliability score. Then, based on the calculated total reliability score, the config generation unit 206 generates the above topology diagram generated by the topology map generation unit 205 so as to be a transfer route that preferentially uses a path control device with high reliability. It has a function of creating config information (configuration information) for route selection in each of the route control devices 101A to 105A and distributing it to each of the route control devices 101A to 105A. ing.

  With the configuration as shown in the network configuration diagram of FIG. 6, even if dynamic routing is not set as the routing method, each of the route control devices 101A to 105A is the prediction result of the reliability. It is possible to preferentially select a route having a high degree of reliability calculated based on the above to transfer data.

  The configuration of the preferred embodiment of the present invention has been described above. However, it should be noted that such an embodiment is merely an example of the present invention and does not limit the present invention. It will be readily understood by those skilled in the art that various modifications and variations can be made according to a particular application without departing from the scope of the present invention.

101, 102, 103, 104, 105 Routing control devices 101A, 102A, 103A, 104A, 105A Routing control devices 111, 112, 113, 114, 115 Routing table 121, 122, 123, 124, 125 Hardware reliability calculation unit 131, 132, 133, 134, 135 Transmission / reception processing unit 131A, 132A, 133A, 134A, 135A Transmission / reception processing unit 141, 142, 143, 144, 145 config table 151, 152, 153, 154, 155 Firmware information 161, 162, 163, 164, 165 hardware information 200 management server 200 A management server 201 firmware information database 201 a firmware version 201 b points 201 c known defects 201 d vendor Recommended level 202 Firmware information database 202a Route control device 202b Failure frequency 202c Score 202c
202d Failure type 202e Deduction point / time 203 Reliability calculation unit 203A Reliability calculation unit 204 Transmission / reception processing unit 205 Topology map creation unit 206 config creation unit 300 Transmission terminal 400 Reception terminal 501 Product ID
502 Running firmware version information 503 Firmware reliability 504 Hardware reliability 505 Average failure interval 506 Available memory upper limit value

Claims (10)

In a communication network system including a route control device that selects a transfer route and controls data transfer operation by the selected transfer route, and a management server that manages each of the route control devices that exist within a management range.
The management server is
A firmware information database storing points obtained by digitizing the prediction results of the reliability of the firmware related to each of the route control devices existing within the management range;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware related to each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the score obtained by quantifying the prediction result of the reliability of the firmware regarding the corresponding routing control device is extracted from the firmware information database, and the hardware information database is applicable. And response means for taking out a score obtained by digitizing the prediction result of the reliability of the hardware related to the routing control device, and returning it to the routing control device of the inquiry source as a response to the reliability inquiry.
And the routing control device
Query means for sending to the management server the reliability query for inquiring a score obtained by quantifying the prediction result of its own reliability, and for receiving a response to the reliability query from the management server;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Means for transmitting to the route control device;
A communication network system comprising: updating means for updating its own routing table based on the routing update information when it receives the routing update information from the adjacent route control device adjacent to itself. . The management server is
Further storing device information including an average failure interval and an available memory utilization upper limit value for each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the device information on the corresponding routing control device is further added as the response to the reliability inquiry, and is returned to the routing control device of the inquiry source, The routing control device
Based on the device information of its own contained in the response received from the management server, it calculates the score which quantified the prediction result of the reliability regarding its own hardware, adds the calculated score, and The communication network system according to claim 1, wherein the communication network system is integrated into the total reliability score. The routing control device
The average failure interval is taken out of the device information of its own included in the response, and the accumulated operation time continued to its present time has exceeded the average failure interval. According to the degree to which the average failure interval is exceeded, the score obtained by quantifying the prediction result of the reliability is set to a low score obtained by deduction.
Further, when the upper limit value of the memory usage rate is taken out of the device information of the own contained in the response, and the current memory usage rate of the own exceeds the upper limit value of the memory usage rate, The communication network system according to claim 2, wherein the number obtained by digitizing the prediction result of the reliability is deducted and set to a low score according to the degree of exceeding the upper limit value of the memory usage rate. The management server is
As the points to be stored in the firmware information database, a point predetermined in advance is deducted in accordance with the severity of a known failure for each version of firmware used in each of the route control devices, and Set the value determined in advance according to the recommended level to the deducted value,
The points stored in the hardware information database may be set to a value obtained by deducting a point determined in advance in accordance with the number of occurrences of a failure occurring in each of the route control devices and the type of the failure. The communication network system according to any one of 1 to 3. Each of the path control devices
In a predetermined cycle, periodically, based on the response to the reliability query to the management server, calculate the total reliability score of its own and repeat the operation of comparing with the evaluation threshold, the total reliability If the degree score recovers from the state of a value less than the evaluation threshold to a value equal to or higher than the evaluation threshold, it creates routing update information prompting restoration to the original state in which transfer to itself is possible. The communication network system according to any one of claims 1 to 4, wherein the communication network system transmits to adjacent route control apparatuses. If dynamic routing is not configured in the communication network,
The management server is
When the adjacent device information indicating that it is a routing control device adjacent to the routing control device of the inquiry source is included when the reliability inquiry from each of the routing control devices is received, the response Instead of performing the operation of returning the response by means, the adjacent device information included in the reliability query is taken out to create a topology diagram showing the connection state of the entire communication network within the management range,
After that, the total reliability score acquired by referring to the firmware information database and the hardware information database, or a current state of the hardware of the routing control device that is the inquiry source in the reliability inquiry When the device information is included, the score obtained by quantifying the prediction result of the reliability calculated based on the current device information is also based on any one of the points comprehensively summarized in the total reliability score. Creating configuration information (config information) for route selection in each of the route control devices with reference to the topology diagram so that the transfer route preferentially uses the route control device with high reliability The configuration information (config information) in each of the created route control devices, and a response to the reliability query Te, whereas performs an operation to deliver the respective inquiring each of said routing control device, each said routing control device,
The reliability inquiry is created in a form that includes the adjacent device information adjacent to itself, or the adjacent device information and the current device information, and the created reliability inquiry is sent to the management server. Send against,
When the configuration information (config information) of its own is received from the management server, the configuration information (config information) is stored in the configuration information (config information) table as information for selecting the route of its own, and data transfer thereafter The communication network system according to any one of claims 1 to 5, wherein route selection is performed with reference to the configuration information (config information) table at a time. If the routing control device is a device not using a routing protocol:
The management server, a function that enables the reliability inquiry from the routing control device and the exchange of the response to the inquiry source to be performed using various protocols and user interfaces used by the routing control device The communication network system according to any one of claims 1 to 6, wherein the communication network system is additionally provided on the side. In a communication network system including a management server that manages each device present in a management range, the route control device selects a transfer route and controls data transfer operation by the selected transfer route, and exists in the management range A firmware information database storing points obtained by quantifying the prediction results of the reliability of the firmware regarding each of the devices;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware regarding each of the devices existing within the management range;
When receiving a reliability inquiry from the device, the hardware information about the device is extracted from the hardware information database as well as the score obtained by quantifying the prediction result of the reliability of the device regarding the device from the firmware information database A response unit for taking out a score obtained by digitizing the prediction result of the reliability of the server and returning the result to the device as the inquiry source as a response to the reliability inquiry.
Inquiry means for transmitting the reliability inquiry for inquiring a score obtained by quantifying the prediction result of the own reliability, and for receiving a response to the reliability inquiry from the management server;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Means for transmitting to the route control device;
A routing control device for updating its own routing table based on the routing update information when it receives the routing update information from the adjacent routing control device adjacent to the routing control device; . In a communication network system including a route control device that selects a transfer route and controls data transfer operation by the selected transfer route, and a management server that manages each of the route control devices that exist within a management range, each of the transfer routes A route control method for selecting the transfer route according to the prediction result of the reliability of the route control device disposed on the upper side,
The management server is
A firmware information database storing points obtained by digitizing the prediction results of the reliability of the firmware related to each of the route control devices existing within the management range;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware related to each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the score obtained by quantifying the prediction result of the reliability of the firmware regarding the corresponding routing control device is extracted from the firmware information database, and the hardware information database is applicable. And outputting a score obtained by digitizing the prediction result of the reliability of the hardware related to the routing control device, and returning it to the routing control device as the query source as a response to the reliability query.
And the routing control device
Sending a query to the management server to query the reliability server for inquiring a score obtained by quantifying the prediction result of the reliability of itself, and receiving from the management server a response to the reliability query;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Sending to the routing controller;
And updating the own routing table based on the routing update information when the routing update information is received from the adjacent routing control device adjacent to the own device. Route control method. In a communication network system including a route control device that selects a transfer route and controls data transfer operation by the selected transfer route, and a management server that manages each of the route control devices that exist within a management range, each of the transfer routes A path control program that causes a computer to execute processing of selecting the transfer path according to the prediction result of the reliability of the path control device disposed on the upper side,
The management server is
A firmware information database storing points obtained by digitizing the prediction results of the reliability of the firmware related to each of the route control devices existing within the management range;
A hardware information database storing points obtained by quantifying the prediction results of the reliability of the hardware related to each of the routing control devices within the management range;
When the reliability inquiry from the routing control device is received, the score obtained by quantifying the prediction result of the reliability of the firmware regarding the corresponding routing control device is extracted from the firmware information database, and the hardware information database is applicable. Response processing for taking out a score obtained by digitizing the prediction result of the reliability of the hardware related to the routing control device, and returning it to the routing control device as the query source as a response to the reliability query.
And the routing control device
Query processing of transmitting the reliability query inquiring the score obtained by quantifying the prediction result of its own reliability to the management server, and receiving a response to the reliability query from the management server;
Overall reliability obtained by integrating the score obtained by quantifying the prediction result of the reliability of its own firmware included in the response received from the management server and the score obtained by quantifying the prediction result of the reliability of the hardware If the score drops to a value below a predetermined evaluation threshold, it generates routing update information that urges switching to another forwarding route by suppressing forwarding to itself, and an adjacent neighbor to the oneself. Processing to transmit to the route control device;
When the routing update information is received from the adjacent route control device adjacent to itself, it has an update process of updating its own routing table based on the routing update information. Routing control program.

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