JP6927930B2 - Programs, devices and methods for creating a network status model for each contract line for each subscriber - Google Patents

Description

The present invention relates to a data model technique for network management.

In recent years, network failures in IT systems have a great direct impact on people's lives and businesses. Therefore, it is important to quickly detect an abnormal state from a huge number of network devices of different vendors and models.
The network management device that manages the entire network collects the event log issued by each network device, or actively inquires of each network device to acquire the status value. The event log and status value differ depending on the vendor and model of each network device. Therefore, it is necessary to implement the analysis program and policy for each vendor and model in the network management device in advance.

Conventionally, there is a technique of collecting different state values acquired from a plurality of different monitored systems into common information of a common rule, copying a plurality of the common information, and applying each to a plurality of different group-specific rules (for example). See Patent Document 1).
In addition, there is also a technology that assigns a common type ID to the status information that is considered to be the same by transmitting and receiving status information between systems that have multiple monitoring and control systems, and performs different handling processing for each type ID. (See, for example, Patent Document 2).
Further, there is a setting management protocol standardization technique for network devices (see, for example, Non-Patent Document 1) and an operation automation technique for a multi-vendor / multi-device environment utilizing the technique (see, for example, Non-Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-334576 Japanese Unexamined Patent Publication No. 2016-201581

IETF RFC6241 NETCONF (Network Configuration Protocol), [online], [Search on July 18, 2018], Internet <URL: https://tools.ietf.org/html/rfc6241> Cisco, [online], [Search on July 18, 2018], Internet <URL: http://www.tail-f.com/>

According to the above-mentioned prior art, the network management device manages the state values collected from the plurality of network devices by different state values for each network device, and cannot be analyzed by the state values by common recognition. Further, each network device only detects whether or not a predetermined state value is abnormal, and does not analyze an abnormality from a plurality of state values of a plurality of network devices.

On the other hand, the inventors of the present application wondered if it would be possible to manage the network state model for each contracted line for each subscriber. A general network management device manages the entire business network including a large number of network devices, and cannot detect a network abnormality for each contracted line for each subscriber.
In addition, the inventors of the present application considered that it is necessary to consolidate the network state models of network management devices of different vendors and models into a common network state model. However, for example, it is difficult to standardize and link network state models having different hierarchical structures.

Therefore, an object of the present invention is to provide a program, an apparatus, and a method for creating a network state model of each contract line for each subscriber.

According to the present invention, it is a program for operating a computer mounted on a device for creating a network state model that manages the state values of each state item of each monitoring part in the network device.
For each subscriber, specify a network service model in which the monitoring parts of each contract line are linked.
A common network state model aggregation means for aggregating a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are linked to each other into a common network state model in which one or more state items are linked for each monitoring part. When,
A user network state model creation means for creating a user network state model in which a monitoring part of a common network state model that matches the monitoring part associated with the contract line is associated with each contract line for each subscriber in the network service model. It is characterized in that the computer functions as a device.

According to other embodiments in the program of the present invention
Common network state model aggregation means
The first type of network state model in which one or more monitoring parts are linked for each state item,
It is also preferable to make the computer function so as to aggregate the second type network state model in which one or more state items are associated with each monitoring part into the common network state model.

According to other embodiments in the program of the present invention
The first type of network state model is SNMP-MIB (Simple Network Management Protocol --Management Information Base).
It is also preferable to make the computer function so that the second type of network state model is YANG (Yet Another Next Generation).

According to other embodiments in the program of the present invention
It is also preferable to make the computer function so that the common network state model is YANG.

According to other embodiments in the program of the present invention
For each type of network state model, it further has a conversion table that defines which state item of the common network state model each state item of the network state model of the type is associated with.
It is also preferable that the common network state model aggregating means makes the computer function so as to describe the state value of the state item of the network state model as the state value of the state item of the corresponding common network state model by using the conversion table.

According to other embodiments in the program of the present invention
The network service model associates an alarm element with each contract line.
For one or more status items, an abnormality detection policy that sets an alarm value for each status value of each status item is specified.
For the user network state model, an alarm explicit means that enables the alarm element associated with each contract line when one or more state items associated with each contract line for each subscriber match the anomaly detection policy. It is also preferable to make the computer function so as to have more.

According to other embodiments in the program of the present invention
It is also preferable to further function the computer as a network state model collecting means for collecting the network state model by using netconf from a plurality of network devices to be collected.

According to other embodiments in the program of the present invention
A model creation request receiving means that receives a model creation request that defines a plurality of network devices to be collected from an operator-operated terminal.
It is also preferable to further function the computer as a model response transmission means for returning the created user network state model to the operator.

According to the present invention, it is a device for creating a network state model that manages the state values of each state item of each monitoring part in the network device.
For each subscriber, specify a network service model in which the monitoring parts of each contract line are linked.
A common network state model aggregation means for aggregating a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are linked to each other into a common network state model in which one or more state items are linked for each monitoring part. When,
A user network state model creation means for creating a user network state model in which a monitoring part of a common network state model that matches the monitoring part associated with the contract line is associated with each contract line for each subscriber in the network service model. It is characterized by having and.

According to the present invention, it is a model creation method of a device for creating a network state model that manages the state values of each state item of each monitoring part in the network device.
The device is
For each subscriber, specify a network service model in which the monitoring parts of each contract line are linked.
The first step of aggregating a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are linked to each other into a common network state model in which one or more state items are linked for each monitoring part.
The second step of creating a user network state model in which the monitoring part of the common network state model that matches the monitoring part associated with the contract line is associated with each contract line for each subscriber in the network service model. It is characterized by executing.

According to the program, apparatus and method of the present invention, a network state model of each contract line can be created for each subscriber.

It is a functional block diagram of the network management apparatus in this invention. It is explanatory drawing which decomposed the network state model so that it corresponds to a state item from a monitoring part. It is explanatory drawing which shows the conversion table. It is explanatory drawing which aggregated the decomposition model of FIG. 2 into a common network state model based on a conversion table. It is a tree configuration diagram of a network service model. The network service model is expressed in YANG. It is a tree block diagram of the user network state model. It is explanatory drawing which shows the abnormality detection policy. It is a tree configuration diagram of the user network state model that clearly shows the alarm. It is a sequence diagram for creating a user network state model.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a functional configuration diagram of the network management device according to the present invention.

The network management device 1 aggregates the status values of each "status item" of each "monitoring site" in the plurality of network devices 2 into a "user network status model" that manages the status values according to each contract line for each subscriber. The operator's terminal 3 can recognize the network state model in each contract line for each subscriber by acquiring the user network state model based on the present invention from the network management device 1.

According to FIG. 1, the network management device 1 includes a network state model collection unit 10, a common network state model aggregation unit 11, a conversion table 110, a user network state model creation unit 12, a network service model 120, and an alarm. It has an explicit unit 13, an abnormality detection policy 130, a model creation request receiving unit 141, and a model response transmitting unit 142. These functional components are realized by executing a program that makes the computer mounted on the device function. Further, the processing flow of these functional components can be understood as a model creation method of a device for creating a user network state model.

[Network state model collection unit 10]
The network state model collecting unit 10 transmits a reference request to the addresses of the plurality of network devices 2 to be collected. On the other hand, network state models that differ depending on the vendor and model are collected from each network device 2. The reference request transmitted by the network state model collecting unit 10 is transmitted at a predetermined cycle (for example, every 5 minutes). As a result, the entire network device can be monitored at all times.
It is assumed that the address of the network device to be collected is registered in advance by the model creation request (described later) received from the operator's terminal 3.

The types of network state models are as follows, for example.
SNMP-MIB (Simple Network Management Protocol --Management Information Base)
YANG (Yet Another Next Generation)

Previously, SNMP-MIB was generally used as a network management protocol. According to SNMP, the network management device 1 as a manager sends a command (reference request) to the network device 2 as an agent. The management information (OID: Object Identifier) included in this command uniquely identifies the management information. Upon receiving the command, the network device 2 returns a UDP / IP-based packet including the status information to the network management device 1.

On the other hand, the implementation of netconf / YANG as a network management protocol is also progressing. This is based on the need to manage the entire network in an integrated manner using orchestrator and controller by virtualizing the network.
According to YANG, the network management device 1 acquires state information from the network device 2 using netconf (network configuration protocol) and creates a network state model. The model is a hierarchical abstraction of the state information of the network device, and has the same relationship as the description language SMI (Structure of Management Information) used in SNMP.
netconf is a communication protocol based on RPC (Remote Procedure Call) for updating settings and acquiring status values for network device 2. This is a client-server model that assumes that the network management device 1 that serves as a client accesses the network device 2 that serves as a server.

The data structure of the network state model is completely different between the SNMP-MIB and YANG described above.
For example, in the case of SNMP-MIB, it is a network state model in which one or more monitoring parts are associated with each state item (first type).
Further, for example, in the case of YANG, it is a network state model in which one or more state items are associated with each monitoring part (second type).
Further, even if the SNMP-MIB and YANG are of the same type, the network device 2 is described by a data structure model different depending on various vendors and models.

For the network device 2 for which netconf cannot be used, the operator may register a pseudo network state model as a template in advance for each device type. In that case, the network state model collecting unit 10 operates as if the network state model registered in advance has been acquired.

[Common network state model aggregation unit 11]
The common network state model aggregation unit 11 associates a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are mutually linked with one or more "state items" for each "monitoring part". Aggregate in "common network state model".
That is, the common network state model aggregation unit 11 aggregates the network state models collected from network devices of different vendors and models into a common network state model in which the differences between the network devices are eliminated.

FIG. 2 is an explanatory diagram of the network state model decomposed so as to correspond to the state items from the monitoring part.

According to FIG. 2, a network state model is shown for each of the network devices A1, A2, and B.
The network device A1 holds the network state model A1 of the SNMP-MIB, and one or more monitoring parts are associated with each state item, and the state values are associated with the monitoring parts.
The network device A2 holds the network state model A2 of the SNMP-MIB, and one or more monitoring parts are associated with each state item, and the state value is associated with the monitoring part.
The network device B holds the network state model B of YANG, and one or more state items are associated with each monitoring part, and the state values are associated with the state items.
According to FIG. 2, each network state model is decomposed so as to correspond to a state item from a monitoring part. That is, it is configured as a pair from the monitoring part to the state item.

(Conversion table 110)
The conversion table 110 defines, for each type of network state model, which state item of the common network state model is associated with each state item of the network state model of the type.
As the common network state model, for example, the data structure of the YANG network state model is used because it is necessary to manage the entire network in an integrated manner. This allows a higher-level orchestra or controller to centrally control network devices of different vendors and models.

FIG. 3 is an explanatory diagram showing a conversion table.

The conversion table is created for each type of network state model. According to FIG. 3, four conversion tables are represented corresponding to FIG.
For example, for the network state model A1, the conversion key "3" is assigned to the state item a. Further, regarding the network state model B, the conversion key "3" is also given to the state item g. This conversion key "3" matches the state item o of the common network state model. In this case, the state items a and g and the state item o are recognized as having the same state value and converted.
Similarly, for example, for the network state model A1, the conversion key "2" is assigned to the state item b. Further, regarding the network state model B, the conversion key "2" is also given to the state item f. This conversion key "2" matches the state item n of the common network state model. In this case, the state items b and f and the state item n are recognized as having the same state value and converted.

The status value types that can be described in the status items of the common network status model are the status value types that can be described in the status items of the first type network status model in the conversion table 110 and the status items of the second type network status model. It is assumed that the state value types that can be described are combined.
For example, regarding the network state model A2, it is assumed that only three state values, UP, DOWN, and UNKNOWN, can be described in the state item c. Similarly, for the network state model B, the state item e can describe only three state values, UP, DOWN, and TESTING. In this case, for the common network state model, four state items, UP, DOWN, UNKNOWN, and TESTING, can be described in the state item m. How the state values of the state item c and the state item e are associated with the state values of the state item m is described in the conversion table as a state transition conversion key. In this way, state transitions can also be treated as a common network state model.

FIG. 4 is an explanatory diagram in which the decomposition model of FIG. 2 is aggregated into a common network state model based on the conversion table.

According to FIG. 4, for example, the state value of the monitoring part 1-> state item a is associated with the monitoring part 1-> state item o of the common network state model by the conversion table 110.
Further, for example, the state value of the monitoring part 2-> state item a is associated with the monitoring part 2-> state item o of the common network state model by the conversion table 110.
In this way, the different network state models of each network device of FIG. 2 are aggregated into the common network state model of FIG.

(Network service model 120)
The network service model 120 defines a network service model in which monitoring parts in each "contract line" are associated with each "subscriber".

FIG. 5 is a tree configuration diagram of the network service model.

The network service model is preset by the operator. This is because each contract line is linked to each subscriber. The contract line specifically represents an accommodation network device. In addition, for example, the following data will be associated with each contract line.
Monitoring part: A common network state model corresponding to this monitoring part is linked Alarm: The state value of the state item of the monitoring part is specified when it corresponds to the abnormality detection policy.

FIG. 6 shows the network service model in YANG.

According to FIG. 6, the subscriber element name, the contract line (accommodation network device) node, and the monitoring site interface (-> state item state) are grouped in the user-site.
In addition, a subscriber element name and a user-site are included for each subscriber user.

[User network state model creation unit 12]
The user network state model creation unit 12 associates each contract line for each subscriber in the network service model with a monitoring part of a common network state model that matches the monitoring part associated with the contract line. To create.

FIG. 7 is a tree configuration diagram of the user network state model.
According to FIG. 7, specifically, the user service model of FIG. 5 is associated with the common network state model of FIG. The operator can recognize the network state of each subscriber by just looking at the user network state model of FIG. 7 without considering the vendor or model of the network device at all.

(Anomaly detection policy 130)
In the abnormality detection policy 130, an alarm value is set for each state value of each state item for one or more state items.

FIG. 8 is an explanatory diagram showing an abnormality detection policy.
According to FIG. 8, when the state item m = the state value “3” and the state item o = the state value “4”, it is registered as an abnormality.

[Alarm explicit unit 13]
The alarm explicit unit 13 is an alarm element associated with each contract line when one or more status items associated with each contract line for each subscriber of the user network state model match the abnormality detection policy 130. Is enabled in the alarm.

FIG. 9 is a tree configuration diagram of a user network state model in which alarms are clearly indicated.
According to FIG. 9, according to the abnormality detection policy 130 of FIG. 8, the state item m of the monitoring part 2 becomes the state value “3” and the state item o of the monitoring part 2 is the state for the contract line 1 of the subscriber A. The value is "4". At this time, the alarm element of the higher contract line 1 is specified in enable.
The operator who has acquired this user network state model can immediately recognize that an alarm has occurred in the contract line 1 of the subscriber A. That is, it is possible to detect a network failure on a subscriber-by-subscriber basis.

[Model creation request receiver 141]
The model creation request receiving unit 141 receives a model creation request defining a plurality of network devices (addresses) to be collected from the operator-operated terminal 3.
When the model creation request receiving unit 141 receives the model creation request, the model creation request receiving unit 141 notifies the network state model collecting unit 10 of the address of the network device to be collected.

[Model response transmitter 142]
The model response transmission unit 142 returns the created "user network state model" to the operator.

FIG. 10 is a sequence diagram for creating a user network state model.

According to FIG. 10, the operator's terminal 3 acquires a real-time user network state model from the network management device 1.
The operator's terminal 3 transmits the model creation request to the network management device 1.
On the other hand, the network management device 1 transmits a reference request to the network device 2 to be collected in real time, and receives various network state models. Then, the network management device 1 creates a user network state model in real time and transmits it to the operator's terminal 3.

Here, in order to emphasize real-time performance, the monitoring site and the state item to be collected may be registered in the model creation request transmitted by the operator's terminal 3. As a result, the network management device 1 can make an inquiry to the network device 2 only for the monitoring part and the state item, and the load of creating the user network state model is also reduced.
Further, the network management device 1 may acquire the network state model for each contracted line for each subscriber by receiving the user network state model in advance. The network management device 1 can acquire a network state model from the network device 1 for each subscriber's contract line requested from the operator's terminal 3. In particular, the alarm explicit unit 13 can detect an abnormality in real time for each contracted line for each subscriber.

As described in detail above, according to the program, apparatus and method of the present invention, it is possible to create a network state model of each contract line for each subscriber.
In particular, according to the present invention, by aggregating network state models that differ depending on the vendor and model into a common network state model, the state values are standardized, and the network state is monitored for each contracted line for each subscriber. be able to.

With respect to the various embodiments of the present invention described above, various changes, modifications and omissions within the scope of the technical idea and viewpoint of the present invention can be easily made by those skilled in the art. The above explanation is just an example and does not attempt to restrict anything. The present invention is limited only to the claims and their equivalents.

1 Network management device 10 Network status model collection unit 11 Common network status model aggregation unit 110 Conversion table 12 User network status model creation unit 120 Network service model 13 Alarm explicit unit 130 Abnormality detection policy 141 Model creation request reception unit 142 Model response transmission unit

Claims (10)

A program that makes the computer installed in the device that creates a network state model that manages the state values of each state item of each monitoring part in the network device function.
For each subscriber, specify a network service model in which the monitoring parts of each contract line are linked.
A common network state model aggregation means for aggregating a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are linked to each other into a common network state model in which one or more state items are linked for each monitoring part. When,
A user network state model creation means for creating a user network state model in which a monitoring part of a common network state model that matches the monitoring part associated with the contract line is associated with each contract line for each subscriber in the network service model. A program characterized by the functioning of a computer as a computer. The common network state model aggregation means is
The first type of network state model in which one or more monitoring parts are linked for each state item,
The program according to claim 1, wherein the computer functions so as to aggregate the second type network state model in which one or more state items are associated with each monitored part into a common network state model. The first type of network state model is SNMP-MIB (Simple Network Management Protocol --Management Information Base).
The program according to claim 2, wherein the second type of network state model is to operate a computer so as to be YANG (Yet Another Next Generation). The program according to any one of claims 1 to 3, wherein the common network state model causes the computer to function as if it were YANG. For each type of network state model, it further has a conversion table that defines which state item of the common network state model each state item of the network state model of the type is associated with.
The common network state model aggregating means is characterized in that the computer functions so as to describe the state value of the state item of the network state model as the state value of the state item of the corresponding common network state model by using the conversion table. The program according to any one of claims 1 to 4. The network service model associates an alarm element with each contract line.
For one or more status items, an abnormality detection policy that sets an alarm value for each status value of each status item is specified.
For the user network state model, an alarm explicit means that enables the alarm element associated with each contract line when one or more state items associated with each contract line for each subscriber match the anomaly detection policy. The program according to any one of claims 1 to 5, wherein the computer functions so as to further have. The invention according to any one of claims 1 to 6, wherein the computer is further functioned as a network state model collecting means for collecting a network state model from a plurality of network devices to be collected by using netconf. program. A model creation request receiving means that receives a model creation request that defines a plurality of network devices to be collected from an operator-operated terminal.
The program according to claim 7, wherein the computer further functions as a model response transmission means for returning the created user network state model to the operator. A device that creates a network state model that manages the state values of each state item of each monitoring part in the network device.
For each subscriber, specify a network service model in which the monitoring parts of each contract line are linked.
A common network state model aggregation means for aggregating a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are linked to each other into a common network state model in which one or more state items are linked for each monitoring part. When,
A user network state model creation means for creating a user network state model in which a monitoring part of a common network state model that matches the monitoring part associated with the contract line is associated with each contract line for each subscriber in the network service model. A device characterized by having and. It is a model creation method of the device that creates a network state model that manages the state value of each state item of each monitoring part in the network device.
The device is
For each subscriber, specify a network service model in which the monitoring parts of each contract line are linked.
The first step of aggregating a plurality of network state models in which a plurality of monitoring parts and a plurality of state items are linked to each other into a common network state model in which one or more state items are linked for each monitoring part.
The second step of creating a user network state model in which the monitoring part of the common network state model that matches the monitoring part associated with the contract line is associated with each contract line for each subscriber in the network service model. A method of modeling a device characterized by execution.

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