JP2008244553A - Network management apparatus and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network management apparatus capable of acquiring problems regarding transitions among states. <P>SOLUTION: The network management apparatus is provided with a means for acquiring control information for setting and/or deleting a path to be transmitted from each of communications devices to another communications device; a means for extracting a series of control information transmitted from each of the communications devices on a route of the same path for setting or deletion of the same path from the acquired control information, and analyzing whether the exchange of the control information for setting or deleting the path has been completed normally; and a means for storing the series of extracted information in association with the path, if the exchange has been completed normally. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a network management technique for an MPLS and / or GMPLS network.

  Patent Document 1 discloses a network management apparatus that collects information on LSP (Label Switched Path) routes from each router in an MPLS (Multi Protocol Label Switching) network to grasp the LSP setting status. Are listed. According to Patent Document 1, the network management apparatus also acquires the upper and lower relationships of LSPs from the router, and enables a search from one LSP to the other LSP.

JP 2005-286818 A

  With the technology described in Patent Document 1, it is possible to grasp the existence of a path that has already been set and its route, but the necessary path has not been set correctly on the network, or the unnecessary path has been correctly set. It is not possible to know that it was not deleted from the network. That is, it is possible to grasp a static state at a certain point in time, but it is not possible to immediately grasp a problem related to transition between states.

  Therefore, an object of the present invention is to provide a network management device and a program that can solve the above-described problems and can grasp a problem related to transition between states.

According to the network management device of the present invention,
Means for acquiring control information for path setting and / or deletion transmitted from each communication device to other communication devices, and for setting or deleting the same path among the acquired control information, Means for extracting a series of control information transmitted by each communication device and analyzing whether transmission / reception of control information for setting or deleting a path has been normally completed; And a means for storing the extracted series of control information in association with the path.

According to another embodiment of the network management device of the present invention,
It is also preferable that the analyzing means specifies the section that caused the abnormal termination from the sections obtained by dividing the path by the communication devices on the route when the transmission / reception of the control information is abnormally terminated.

According to another embodiment of the network management device of the present invention,
When the transmission / reception of the control information for path setting ends normally, means for acquiring and storing information on the status of the set path from at least one communication device on the set path indicated by the control information, When the information about the status of the set path can be acquired, the extracted series of control information is stored in association with the information about the status of the acquired set path. It is also preferable.

  According to the program of the present invention, a computer is caused to function as the network management device.

  Whether the communication device acquires control information for setting and / or deleting a path to be transmitted to another communication device, and whether or not a series of control information for setting or deleting a certain path has been normally completed By analyzing, it is possible to grasp the problem between the state transitions. In the case of abnormal termination, it is possible to quickly identify the cause of the problem that occurred during the state transition by identifying the section in which the problem occurred based on the collected control information.

  In addition, when the path setting control information is normally completed, the information regarding the status of the setting path is acquired from at least one communication device on the path of the setting path, so that the contents can be grasped by the control information. It is possible to immediately grasp that there is a contradiction with the actual state.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a configuration diagram of a communication system including a network management apparatus 1 according to the present invention. A communication device (hereinafter referred to as node 2) in the communication system has a data interface for exchanging data, and the data interface of each node 2 is connected to each other to form a data network 20. Each node 2 has a management interface connected to the management network 10 and a control interface connected to the control network 30. Here, the management network 10 is a network for transmitting and receiving management information between the network management apparatus 1 and each node 2, and the control network 30 exchanges control information such as path setting / deletion between the nodes 2. It is a network to do. FIG. 1 shows a configuration when each node 2 is based on the GMPLS technology. When each node 2 is based on the MPLS technology, the control network 30 and the data network 20 are the same, that is, the data interface. There is no distinction between control nodes and control interfaces, and each node 2 transmits and receives data and control information using the same interface.

  In the present invention, the network management device 1 receives control information transmitted by each node 2. FIG. 1 shows a connection between a network management apparatus 1 and a control network 30, and the control network 30 sends all control information transmitted from each node to the network management apparatus 1 in addition to the original destination node 2. A form in which the network management device 1 collects control information by distributing is shown. However, for example, each node 2 outputs control information to the control interface for transmission to other nodes 2 and outputs the same control information to the management interface, whereby the network management apparatus 1 collects the control information. Form may be sufficient.

  The network management device 1 transmits the control information transmitted from each node 2 on the path of the path in order to set or delete one path from the received plurality of control information, or to update the set path. Are extracted, and the processes described below are performed. The series of control information is extracted using, for example, an identifier that uses the same value in a series of control information such as a session ID included in the control information.

  FIG. 2 is a processing flow diagram when the network management apparatus 1 according to the present invention extracts a series of control information for setting one path. In the MPLS or GMPLS network, the path setting is started when the node 2 that is to set the path performs a route calculation and transmits a path setting request message to an adjacent node on the route. Each node on the route forwards this path setting request message in the order of the route, and when the final node of the route receives the path setting request message, it transmits a path setting confirmation message to the adjacent node on the route. Each node on the route transfers this path setting confirmation message in the reverse order of the route, and the path setting is completed when the first node on the route receives the path setting confirmation message.

  The network management device 1 determines whether or not the path setting is normally completed based on the extracted series of control information and the protocol for the path setting being used (S21). For example, in the case of path setting by the above-described MPLS / GMPLS, when the path setting request message is not transmitted to the end point node of the route, it can be determined as abnormal termination.

  When transmission / reception of control information for path setting ends normally, it is determined whether a path setting event generated by the node 2 as management information has been received for the path indicated by the control information (S22). . If it has been received, detailed information about the status of the set path is acquired from the node 2 on the route via the management network 10 (S24). Here, the state about the setting path includes the bandwidth of the setting path, the route, the address given to the interface of each passing node, the identifier or name for specifying the setting path given to the setting path, etc. To tell. If the path setting event has not been received, a problem may have occurred in the management network 10, and after performing the user notification process (S 23), the consistency with the analyzed control information is confirmed. For confirmation, an attempt is made to acquire detailed information about the state of the path set by the series of control information from at least one node 2 on the path of the path (S24). Note that the user notification process is a process for causing a maintenance person using the network management apparatus 1 to recognize the occurrence of a problem, such as display on a screen or generation of a warning sound.

  When the detailed information about the state of the setting path is acquired (S25), the acquired detailed information of the setting path is associated with a series of control information transmitted by each node 2 for setting the path in the database. Save (S26). On the other hand, if it cannot be acquired, the content that can be grasped from the received control information and the actual state are different from each other, so a notification process to the user (S28) is performed.

  If the determination result in S21 is abnormal termination, the problem location is identified from the received control information (S27). Specifically, the node 2 that has detected the error at the time of path setting analyzes the control information for error occurrence notification transmitted to the other nodes 2, and which node 2 has a problem, Which link is requested and failed is identified, and a process of notifying the identified content to the user (S28) is performed.

  FIG. 3 is a processing flowchart when the network management apparatus 1 according to the present invention extracts control information for path deletion. In the MPLS or GMPLS network, path deletion is performed by transferring a message for path deletion on the route, similarly to path setting.

  The network management device 1 determines whether or not the path deletion has ended normally based on the extracted series of control information and the protocol for path deletion being used (S31).

  When transmission / reception of control information for path deletion is normally completed, it is determined whether or not a path deletion event generated as management information by the node 2 has been received for the path indicated by the control information (S32). . If not received, there is a possibility that a problem has occurred in the management network 10, so a user notification process (S33) is performed, and the user performs a mask process for each node in advance for path deletion. Therefore, it is confirmed whether or not mask processing is being performed (S34).

  If the mask processing has been completed, it can be determined that the normal deletion processing has been completed normally, the control information for path deletion is stored in the database in association with the path, and the path status is deleted. Change to finished. Thereby, a series of control information transmitted by each node from generation to deletion of the path is stored in association with the path, and the information is also used for later failure analysis. If the mask process has not been completed, it can be determined that a failure has occurred. Therefore, the control information used for recovery of the failure path is extracted from the received control information and analyzed (S35). If the fault path is bypassed from the control information and the alarm is restored (S36), the database path detailed information is updated (S37), and a notification process to the user (S39) is performed. If the failure path is not bypassed and the failure continues, the control information is analyzed as in the case of path setting, and the cause of the path not being bypassed is determined (S38).

  If the determination result in S31 is an abnormal end, the problem location is isolated (S38) from the received control information as in the case of path setting.

  Furthermore, when the network management apparatus 1 extracts control information for updating a path that has already been set, the network management apparatus 1 stores the extracted control information in association with the path in the database.

  FIG. 4 is a block diagram of the network management apparatus 1 according to the present invention. As shown in FIG. 4, the network management device 1 includes a database generation unit 11, a database 12, a path information acquisition unit 13, and a control information acquisition analysis unit 14.

  The control information acquisition / analysis unit 14 acquires control information for path setting and / or deletion transmitted from each node 2 to the other node 2, and a series for setting or deleting the same path from the acquired control information. The control information is extracted, and it is determined whether it is normal end or abnormal end. In the case of an abnormal end, the location where an abnormality has occurred is isolated, and a user notification process is performed by controlling an output unit (not shown). The abnormality occurrence location is specified, for example, by a section obtained by dividing the path route by the node 2 on the path. When the control information acquisition / analysis unit 14 acquires a series of control information for the same path, the path information acquisition unit 13 transmits detailed information about the path status from the node 2 on the path of the path via the management network 10. Get information about alarm masking.

  When the series of control information ends normally and the detailed information about the state of the same path acquired from the path information acquisition unit 13 can be acquired, the database generation unit 11 associates the series of control information with the path. If the detailed information on the same path cannot be acquired, the output unit (not shown) notifies the abnormality, and the output unit displays network problems such as displaying a problem on the screen and generating a warning sound. Processing for notifying the user of the device 1 of the occurrence of an abnormality is performed.

  FIG. 5 is a diagram showing information stored in the database 12. FIG. 5A shows detailed information about the state of the path. The path with the path name “path 1” starts from the node with the node address “1.1.1.1” and has a node address “7.7.7”. .7 "node is set and its route is shown. FIG. 5B is an example of control information transmitted by each node for setting the path.

  The network management apparatus according to the present invention can be realized by a computer program that causes a computer to function as each unit in FIG. This computer program is stored in a computer-readable storage medium or can be distributed via a network. Furthermore, the present invention can be realized not only by hardware and software but also by a combination thereof.

It is a figure which shows the communication system structure by this invention. It is a control flow figure at the time of path setting. It is a control flow figure at the time of path deletion. 1 is a block diagram of a network management device according to the present invention. FIG. It is a figure which shows the information of a database.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Network management apparatus 2 Node 10 Management network 20 Data network 30 Control network 11 Database production | generation part 12 Database 13 Path information acquisition part 14 Control information acquisition analysis part

Claims (4)

Means for acquiring control information for path setting and / or deletion transmitted by each communication device to other communication devices;
Among the acquired control information, in order to set or delete the same path, a series of control information transmitted by each communication device on the path of the path is extracted, and control information for path setting or deletion is transmitted and received. A means for analyzing whether or not has been successfully completed;
A means for storing the extracted series of control information in association with the path when the processing is normally completed;
A network management device. The means for analyzing, when transmission / reception of control information ends abnormally, identifies the section that caused the abnormal end from among the sections divided by the communication device on the path,
The network management device according to claim 1. When transmission / reception of control information for path setting is normally completed, information on the status of the set path is acquired from at least one communication device on the set path indicated by the control information,
The saving means stores the extracted series of control information in association with the acquired information on the set path status when the information on the set path status can be acquired. Process notifications,
The network management device according to claim 1 or 2.   The program for functioning a computer as a network management apparatus of any one of Claim 1 to 3.

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