KR20060059738A - Method for managing fault information of distributed forwarding architecture router - Google Patents

Abstract

The present invention relates to a failure information management method of a distributed forwarding router that provides information useful for system management to an operator by managing a state of a physical component of a router through a private MIB in a network management manager system.

In the present invention, after the server for managing the failure information of the router is running, when the network management manager system receives a failure level setting or change request message from the operator is sent to the router and stored in the database, the network management manager system is When the failure level change notification message is received from a router, the failure level change information transmitted from the router is stored in a database. When the network management manager system receives a hardware failure notification message from the router, the grade of the failure notification message is analyzed. Store in the database.

In this way, the operator can perform a failure management function for each failure level for the router, and also can handle the failure for each hardware device, it can be useful for stabilizing the network and router in the remote network management system.

Network Management Manager System, Router, Failure, Private MIB, Operator, Failure Rating

Description

Fault information management method of distributed forwarding structure router {METHOD FOR MANAGING FAULT INFORMATION OF DISTRIBUTED FORWARDING ARCHITECTURE ROUTER}

1 is a structural diagram of a distributed forwarding structure router to which the present invention is applied.

2 is a structural diagram of a management information base (MIB) for failure management of a distributed forwarding structure router according to the present invention.

3 is an information table for setting a failure level and collecting failure information for failure management of a distributed forwarding structure router according to the present invention.

4 is a flowchart illustrating a failure information management method of a distributed forwarding structure router in a network management manager system according to the present invention.

 Explanation of symbols on the main parts of the drawings

1: network management manager system 2: routing processor

3: operator matching function unit 4: network management agent function unit

5: Configuration management function 6: Fault management function

7 statistical function 8 routing protocol function

9: line processor

The present invention relates to a method of managing failure information of a distributed forwarding structure router, and more particularly, to manage failure information of a distributed forwarding structure router in a network management manager system through a private management information base (hereinafter referred to as a private MIB). By doing so, the present invention relates to a method of managing fault information of a distributed forwarding router that provides an operator with useful information for system management.

Currently, most network management devices using the Internet use the Simple Network Management Protocol (SNMP) to manage the network and monitor the operation of the network management systems. Such SNMP is the most common network management protocol, and is composed of a structure for exchanging information between a network management manager system for managing a network and a network management agent system of a router, which is a network management target system.

As described above, a standard is used between a network management manager system including an element management system (EMS) function and an network management agent system using a standard protocol such as SNMP in an Internet Protocol (IP) network. Alternatively, it performs network management function with private MIB, and manages configuration management, fault management, performance management, account management, and security for network managed systems such as routers. (Security Management) function.

In the network management manager system, it is necessary to promptly provide the operator with the failure of the router which is the network management target. To this end, the current network management manager system uses entity MIB, interface MIB information, and trap MIB for configuration management, configuration management, and fault management of a managed router. The entity MIB provides physical and logical configuration information of the system, the interface MIB provides configuration information and traffic statistics information for a physical link connected to a network, and the trap MIB provides linkUp / linkDown) information. The network management system (NMS) periodically reads the MIB information (GET) or receives the router's event information to perform the logic function.

However, the failure management function of a physical component is dependent on the physical shape of the network equipment, and the fault information defined by the standard also defines only information about the up / down of a physical link. There is a difficulty in collecting information. In particular, since the definition of fault information MIB such as physical link up / down is defined many years ago, it is impossible to provide information for hardware failure management of distributed forwarding structure routers in which the routing engine and the forwarding engine handle distributed high-speed traffic. Do. Therefore, most router equipment companies provide information by defining private MIBs for each router device. However, this means that when the configuration of a router changes or a new module is added, the private MIB must be changed, and the router as well as the system management function to handle the router There is a problem that the functions of the EMS network management manager system and the network management agent system for remote management must also be inevitably changed.

In addition, since a router transmits a trap message to a network management manager system when a failure occurs, the network management manager system has a problem of collecting a failure message regardless of the nature of the failure or whether an operator takes action. Furthermore, even in the network management manager system, there is a problem in that the failover processing is delayed due to an error in the failure level setting between the router and the network management manager system by managing the fault information that is unilaterally delivered from the system.

On the other hand, a paper on the development of a Java-based EMS system that provides effective network management by providing simplified network management information through CLI (Command Line Interface) has been presented. Development of SNMP-based EMS for Korean Society of Information Scientists and Engineers, vol.28 no.2 pp.481 ~ 483, 2001.). In addition, Korean Patent Publication No. 10-0357636 (2002.10.08) discloses an alarm information management method in a network management device. The paper and the prior patent do not propose a solution to the problems caused by the change of the shape of the router which is the network management target or the addition of a new module as described above.

The present invention has been made to solve the above problems, and in the network management manager system, additional information that cannot be managed by standard MIB information defined for network management of a managed router is defined as a private MIB to manage a failure management function of the router. The purpose of the present invention is to provide a method for managing fault information of a distributed forwarding router.

In the failure information management method of the distributed forwarding structure router in the EMS according to the present invention for achieving the above object, in the failure information management method of the distributed forwarding structure router managed by the network management manager system including the EMS (EMS) function,

A first step of monitoring an operation state of a management target router connected to a network by a network management manager system and providing the operation state information to a network topology; Checking whether the configuration information of the router is stored in a database, and if not, requesting the configuration information of the router to the corresponding router, collecting the configuration information from the router, and storing the configuration information in the database; A third step of driving a server for managing failure information of the router to wait for reception of a failure information message; In the third step, the network management manager system transmits the message to a router when receiving a failure level setting or change request message from an operator, and receives a response from the router and stores the response in a database; In the third step, when the network management manager system receives a failure level change notification message from the router, requesting a failure level to the router, and receiving the changed failure level information from the router and storing the changed failure level information in a database; And in the third step, when the network management manager system receives the hardware failure notification message from the router, analyzing the class of the failure notification message and storing it in a database.

In one embodiment of the present invention, in the failure information management method of the distributed forwarding structure router according to the present invention, in the third step, when the network management manager system receives a failure information retrieval request message from the operator from the operator, the failure information is displayed. The method may further include a seventh step of searching a stored database and delivering the retrieved fault information to an operator.

The present invention defines a private MIB capable of integrated management of failure level setting and status information for standardizing failure information for failure management of a router having a distributed forwarding structure, and setting and changing a failure level from a network management manager system to a router. Or by providing analysis information on fault information, minimizing the change of fault function even if the router shape is changed, and analyzing the received fault information, operators can perform a quick action for changing the state of the router to operate the network stably. The EMS provides a method of managing fault information in a distributed forwarding structure router.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, detailed descriptions of preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a structural diagram of a distributed forwarding structure router to which the present invention is applied. Referring to FIG. 1, a processor architecture and a routing processor of a distributed forwarding architecture router are conceptually illustrated. As shown in FIG. 1, a router having a distributed forwarding structure according to the present invention increases traffic throughput as the Internet traffic increases, thereby processing high-speed data. The distributed forwarding structure router performs routing information and system management. It is implemented by separating the routing processor 2 to perform and the line processor 9 which carries routing information.

Referring to FIG. 1, the present invention is applied to a distributed router system including a routing processor 2 performing routing and system operation management functions and a plurality of line processors 9 performing forwarding of routing information. The routing processor 2 includes an operator matching function unit 3, an SNMP network management agent function unit 4, a configuration management function unit 5 for system configuration management, and a failure management function unit 6 for fault and state management. ), The statistical function unit 7 and the routing protocol function unit 8, and the network management manager system 1 including the EMS function of the router perform configuration management, performance management, fault management, security management, and network management functions. Each server for the operation operates, and consists of a database (DB) and MIB for information management between them.

The EMS network management manager system 1 of the router may remotely manage and control physical and logical information of the router through a Graphic User Interface (GUI). First, each router shown in the network topology (priority) periodically connects system group MIB (system group MIB) information to provide a normal operation of the router, and reads the MIB and interface MIB information to access the network To provide (10). This information uses the information provided by the standard MIB and is provided by the configuration management function. However, in a system consisting of a routing process 2 and a plurality of line processors 9, hardware failure and status information for each processor, and information on the degree of failure cannot be provided by the standard MIB described above. Thus, this information is implemented using a private MIB defined further in the fault management function (11).

2 is a structural diagram of a private MIB for fault management of a router having a distributed forwarding structure according to the present invention, which is a diagram of a private MIB structure for hardware fault information / status information management and fault level setting for each processor of the router. As shown in FIG. 2, a system managed through SNMP in an IP network may additionally define a private MIB and provide information in addition to the standard MIB. Currently, MIBs for fault information management are not defined as standards. The private MIB shown in FIG. 2 is a failure information MIB applicable to all routers having the distributed router structure described in FIG. 1. However, if the hardware structure of a specific router provides hardware other than the type defined in the fault hardware type (faultHwType) of the MIB, only the corresponding information needs to be added.

As shown in FIG. 2, the private MIB applied to the present invention is largely composed of a failure information management table 201 and a failure occurrence notification 211. The failure information entry 202 of the failure information table 201 includes a failure information identifier 203, a failure hardware type 205, identification information for each failure hardware type 205, a description of failure information 206, and a failure. Hardware implementation information 207, faulty hardware status information 208, faulty hardware redundancy information 209, and fault rating 210. FIG. In addition, the failure occurrence notification 211 includes a hardware implementation state change notification 212, a hardware operation state change notification 213, a hardware redundancy state change notification 214, a hardware failure class change notification 215.

The failure information management table 201 and the failure occurrence notification 211 of the private MIB will be described in more detail with reference to FIG. 3.

3 is an information table for setting a failure level and managing failure information for failure management of a distributed forwarding structure router according to the present invention. 3 (a) is for an object for setting a failure level and collecting failure information in an EMS. The object of the fault identifier (faultIndex) 203 is an identifier for fault information, and a fault hardware type (faultHwType) 204 indicates information about hardware (H / W) constituting a router. Meanwhile, the distributed forwarding structure router according to the present invention includes a routing processor (RP), a switch, a line processor LP, a power supply, a fan, and the like. Hardware information not defined in the fault information management table according to the present invention may be added when the MIB is compiled.

The identification information (faultHwNo) 205 for each failure hardware type is configured as one or more entities according to the failure hardware type (faultHwType) 204, and thus is used as an identifier for the same type. 204) The formula x 100 + serial_no 'is used. That is, when two routing processors (RP) are implemented in redundancy and two are mounted, the faulty hardware type (faultHwType) 204 is '3', and the faulty hardware type identification information (faultHwNo) 205 is '301, 302'. A row of values is created. In the case of a router having five line processors LP, the fault hardware type (faultHwType) 204 for the line processor LP is '5', and the fault information for each hardware type (faultHwNo) 205 is '501'. Rows of values 502, 503, 504, 505 'are generated.

A description of fault information (faultHwDescr) 206 indicates a description of the corresponding failing hardware type. The failing hardware mounting information (faultHwFilledStats) 207 indicates the mounting status of the failing hardware, the failing hardware status information (faultHwOperStatus) 208 indicates the operation status of the failing hardware, and the failing hardware redundancy information ( faultHwDualStatus) 209 indicates the redundancy application state of the corresponding failing hardware, and fault class (faultHwClass) 210 indicates the fault level of the corresponding failing hardware.

On the other hand, when a failure and state change occurs in the distributed forwarding structure router according to the present invention, the EMS network management manager system (1) by putting information defined in the fault notification (211) in the private MIB in the SNMP trap message To pass. In other words, when the failure status of the failed hardware is changed, the corresponding failed hardware implementation status change trap (hwFilledChange Trap); when the operation status of the failed hardware is changed, the corresponding failure hardware operation status change notification trap (hwOperChane Trap) When a faulty hardware duplication state is changed, a corresponding faulty hardware duplication state change notification trap (hwDualChange Trap) is transmitted. When a faulty hardware fault class is changed, a corresponding faulty hardware fault class change notification trap (hwFaultClassChange Trap) is transmitted. The name of the object defined in the present invention may be arbitrarily changed within the range including the meaning of the aforementioned object.

4 is a flowchart illustrating a failure information management method of a distributed forwarding structure router in EMS according to the present invention. Referring to FIG. 4, when a network management manager system and a router are connected to a network, each process is driven to communicate between networks (S10), and a network topology is configured by an operator (S11). In this case, the operator may configure a multi-router management group, which is preferably configured in a tree structure. The operation state of the management target router connected to the network is monitored (S12) to determine whether the management target router is normally operating (S13). If the router does not operate normally as a result of the determination in step S13, a failure of the corresponding router is processed in a network topology (S14), and the monitoring is periodically performed until the router in which the network failure is detected becomes a normal state. (S12 to S14). If the router is in normal operation (S13), it is determined whether the configuration information of the router exists in the database (S15). If the configuration information exists in the DB, the operation state of the router is periodically monitored (S12 to S15). . If the configuration information of the router does not exist in the DB (S15), that is, when the network topology is initially configured or a newly managed router is newly added, the system configuration information is requested to the corresponding router for the EMS configuration (S16). After collecting the information (S17) and configuring the EMS, and stores the configuration information of the router in the DB (S18). The above function provides the router status information to the network map through the periodic monitoring function of the router, so that the network operator can determine whether the network or the router is operating normally. When the server for the failure management function of the router is driven (S19), a message reception wait state for processing a failure management message (S20).

As such, when an operator requests a failure level setting or change in a message reception waiting state (S20) for processing a failure management message (S21), an SNMP message for setting / changing a failure level is transmitted to the router (S22). When the router receives a response after changing the failure level information (S23), the network management manager system changes its DB information (S24).

If, in the message reception waiting state (S20), a trap message for the occurrence of a failure and an event is received from the router (S25), it is determined whether the notification is for failure level change (S26). Request a failure level from (S27) collects the changed failure information (S28) and stores it in the DB (S29). If the trap message received from the router is not a failure level change notification of the router (S26), this is a message for notifying the occurrence of a failure of the router. The failure level of the received failure occurrence notification message is mapped (analyzed) (S30). After storing in (S31), it processes the operator notification function for each failure level or failure message defined in the network management manager system (S32).

If a failure information search request is received from an operator in the message reception waiting state (S20) (S33), a DB is searched (S34), and information of an operator request form is transmitted (S35). That is, the failure-related information provided to the operator provides information on failure statistics, failure records, failure causes, and failure grades for each router, and is provided in the form of a graph or a table according to the characteristics of the provided information (S36).

The detailed description and the contents of the drawings described above disclose the optimal embodiments of the present invention, and the present invention is not limited to these embodiments. In addition, although specific terms are used in the embodiments of the present invention, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Furthermore, it is apparent to those skilled in the art that various modifications and imitations can be made without departing from the scope of the technical idea of the present invention.

Therefore, the scope of the present invention should be determined by the appended claims rather than by the foregoing description or drawings.

According to a failure management method of a distributed forwarding structure in a network management manager according to the present invention, a network management operator sets a failure level of a router and transmits it to a router, and receives and manages the grade information set by a router operator to cause a failure for each failure level. Since the management function can be performed and failure handling of each hardware device can be performed, it can be usefully used for stabilizing the network and the router by quickly and accurately determining the state of the router in the remote network management system.

Claims (14)

In the failure information management method of a distributed forwarding structure router managed by a network management manager system including an EMS function, A first step of monitoring an operation state of a management target router connected to a network by a network management manager system and providing the operation state information to a network topology; Checking whether the configuration information of the router is stored in a database, and if not, requesting the configuration information of the router to the corresponding router, collecting the configuration information from the router, and storing the configuration information in the database; A third step of driving a server for managing failure information of the router to wait for reception of a failure information message; In the third step, the network management manager system transmits the message to a router when receiving a failure level setting or change request message from an operator, and receives a response from the router and stores the response in a database; In the third step, when the network management manager system receives a failure level change notification message from the router, requesting a failure level to the router, and receiving the changed failure level information from the router and storing the changed failure level information in a database; And A sixth step in which the network management manager system analyzes the grade of the failure notification message and stores it in a database when receiving the hardware failure notification message from the router; Disability information management method of a distributed forwarding structure router comprising a. The method of claim 1, wherein the first step, And configuring a network topology for the router by an operator when a network connection is made with the router to be managed in the network management manager system. The method of claim 1, wherein the first step, The network management manager system monitors an operation state of the router to be managed and provides failure information of the corresponding router to the network topology if it is not in normal operation. . The method according to any one of claims 1 to 3, The network topology is a failure information management method of a distributed forwarding structure router, characterized in that the tree structure. The method of claim 1, wherein the second step, Disability information management method of a distributed forwarding structure router, characterized in that whether the configuration information of the router that is operating normally stored in the database. The method of claim 1, wherein the second step, The network management manager system comprises configuring an element management system (EMS) by using the collected configuration information of the router failure information management method of a distributed forwarding structure router. The method of claim 1, wherein the fourth step, The network management manager system forwarding an SNMP message for setting / changing a failure level to the router; And A router receiving the SNMP message, performing a failure level setting / change and transmitting the failure level setting / change result to the network management manager system; Disability information management method of a distributed forwarding structure router comprising a. The method of claim 1, wherein the sixth step is And informing the operator of each failure level or failure occurrence message defined in the network management manager system. The method of claim 1, In the third step, when the network management manager system receives a failure information search request message of a router from an operator, the network management manager system may further include a seventh step of searching a database storing the failure information and delivering the retrieved failure information to the operator. Disability information management method of a distributed forwarding structure router, characterized in that. The method of claim 9, wherein the failure information, Failure information management method of a distributed forwarding structure router, characterized in that the failure-related information including failure statistics, failure history, failure cause, failure level for each router. The method of claim 9, The network management manager system, the failure information management method of the distributed forwarding structure router, characterized in that for generating a graph or table to transmit the retrieved failure information according to the failure information search request of the operator. The method of claim 11, The table is a failure information management method of a distributed forwarding structure router, characterized in that the private MIB. The method of claim 1, And the network management manager system receives a trap message including the failure information from the router. The method of claim 1, The network management manager system manages failure information of the router through a graphical user interface (GUI).

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