KR20050081232A - Apparatus and method of information management in network device - Google Patents

Abstract

The present invention relates to a method and a device for managing information of a network device, and to allow an administrator to manage various network devices through a single server, OAM information, and to control the traffic generated in the existing method using SNMP, RMON, etc. It can minimize the quantity and automatically detect network equipment connected through the network, so that OAM information can be collected / managed.

In addition, the present invention is to extend each server in a hierarchical structure, so that the administrator can manage a variety of network equipment in multiple regions through a single server.

Description

Apparatus and method of information management in Network Device}

The present invention relates to a method and a device for managing information of a network device, and more particularly, even if a separate management device or a single management device is used to manage / operate various network devices according to the characteristics of each device. The present invention relates to a method and apparatus for managing information of a network device for efficiently managing management information of a plurality of network devices without setting information.

In general, the method of managing information of various network equipment is as follows.

First, it is possible to manage the management information of a plurality of network equipment of one kind in a zone by a single network management system (NMS) or element management system (EMS).

Second, in order to manage management information of several types of network devices as a management device, each network device and management information is provided by a device capable of interpreting a standard management information base (MIB) or a supported enterprise MIB. In this case, the device that connects the devices may be HP openview.

Third, information that needs to be processed immediately, such as fatal alarm information of each network device, is connected to the alarm panel of each network device and the alarm panel of the service provider's own alarm panel. The management equipment can be easily obtained.

Fourth, if you have a log server connected to each network device to analyze the log information (Log server), or if you support a Web server (Web server), separately from the Web log server (Web log server) Install to monitor current network device status.

Fifth, individual or equipment company's own tools can be used to monitor the traffic of each network device.

Sixth, you can use Remote Network Monitoring (RMON). However, RMON often causes a load in the transmission of information of each network device.

RMON provides administrators with standard information from a central server that can be used to monitor, analyze, and troubleshoot distributed local area network groups with T-1 / E-1 and T-2 / E-3 lines connected to each other. .

Seventh, in order to manage the information of each network device, use a configuration tool or management device provided by the provider of each network device.

However, this general method requires the use of tools provided by the manufacturer of each network equipment, or the use of SNMP MIB or RMON to control / monitor the whole.

In case of using the tool provided first, it is easy to use and manage when using the same manufacturer's equipment in the whole network, but when using the equipment of different manufacturers together, there is a problem of interoperability. Problems that are difficult to manage information.

Therefore, in an entire network using equipment from different manufacturers, it is necessary to purchase tools created by agreements between network equipment companies or use standard SNMP and RMON to use existing monitoring servers.

However, RMON, which was initially standardized for integrated monitoring, is difficult to use due to heavy loads, and it is not suitable for real-time monitoring because it is slow to perform the entire work using the MIB.

Therefore, the present invention was devised to solve the above problems, and even if individual management equipment is used to manage / operate various network equipments or one management equipment is used, information is set according to the characteristics of each equipment. Instead, the object of the present invention is to provide a method and apparatus for managing information of network equipment that can efficiently manage management information of a plurality of network equipment.

Network equipment management system according to an aspect of the present invention for achieving the above object, generates OAM (Operations, Administration and Maintenance) information, when the OAM information request message is received, and transmits a response message including the OAM information At least one network device, and when the network device is connected through the network, and automatically transmits the OAM information request message through the network, and at least one server to extract and manage the OAM information from the response message.

Each server according to the present invention includes a network interface unit for connecting each network device and another server through a network, and a communication processing unit for setting a communication path for exchanging messages when each network device is connected through the network interface unit. And, when the network equipment is connected through the network interface unit, the information monitoring unit for transmitting the OAM information request message through the communication path, storing the OAM information extracted from the response message, and provides the stored OAM information at the request of the administrator; It includes a database that stores OAM information.

In addition, the information monitoring unit according to the present invention manages at least one or more of the alarm OAM information, security OAM information, log OAM information or system OAM information.

In addition, the network device according to the present invention, when the network connection unit for connecting to other network equipment and each server through the network, and generates OAM information of the network equipment, and receives the OAM information request message from the network connection unit from each server, An information processing unit for transmitting a response message including the OAM information, and OAM information storage unit for storing the generated OAM information.

In addition, the information processing unit of the network equipment according to the present invention, a communication connection processing unit for setting the communication path for transmitting the OAM information according to the message transmitted from each server through the network connection unit, and if the OAM information request message is received from each server, And an information exchange unit for generating and transmitting a response message including the OAM information stored therein.

On the other hand, the network device management method according to another aspect of the present invention, when detecting at least one network device connected to the network via the network, automatically setting a communication path for message exchange, the network equipment OAM information Generating and storing a message; transmitting, by the server, an OAM information request message to each network device through a communication path; and when the network device receives the OAM information request message, transmitting a response message including the stored OAM information. And extracting, by the server, OAM information from the response message and managing the network equipment.

In addition, the network device management method according to the present invention, when the administrator of the network equipment changes the OAM information management method through the server, the server transmits an information change message including the OAM information management method information is changed to the network device And changing, by the network equipment, the OAM information management scheme according to the information change message, and transmitting a response message to the server.

In addition, the step of setting the communication path of the network equipment management method according to the present invention, the step of transmitting a hello message to each network equipment connected through the network, and when the network equipment receives the hello message, the communication path information And transmitting a hello response message including a server to the server, and establishing a communication path with the network equipment according to the communication path information included in the hello response message.

The network device management method according to the present invention further includes the step of determining, when at least one server is included, one server to function as an agent server and another server to function as a subagent server. do.

Hereinafter, a method and apparatus for managing information on network equipment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a configuration of an information management apparatus of network equipment according to an exemplary embodiment of the present invention.

Referring to FIG. 1, an information management apparatus for network equipment according to the present invention includes a plurality of operations, administration and maintenance (OAM) servers 11 to 1n, and a plurality of network equipments 21 to 2n.

Each OAM server 11-1n and each network device 21-2n are connected by a network 30.

Each network equipment 21-2n processes packets exchanged through the network 30 in order to provide a service at the request of subscribers.

And, each OAM server (11 ~ 1n) monitors the OAM information of each network equipment (21 ~ 2n).

That is, each OAM server 11 to 1n collects and manages OAM information generated by each network device 21 to 2n, and provides OAM information to be managed according to the administrator's request, or the administrator sets specific OAM information to be set. The output is recognizable so that the administrator can efficiently manage each network device 21-2n.

In this case, one OAM server 11 to 1n is provided to monitor the OAM information of each network device 21 to 2n, or each OAM information is provided to the OAM server 11 to 1n, and each OAM information is assigned. Can be monitored.

At this time, the type of OAM information may be classified into alarm information, log information, security information, and system information.

When a plurality of OAM servers 11 to 1n are provided, one agent OAM server 11 to 1n and a plurality of subagent OAM servers 11 to 1n may be determined and configured, and the determined agent OAM server 11 may be configured. 1n), the OAM server 11-1n of one of the subagent OAM servers 11-1n can be re-determined as the agent OAM server 11-1n.

2 is an internal block diagram illustrating a configuration of an OAM server according to an exemplary embodiment of the present invention.

2, the OAM server 100 according to the present invention includes a database (DB) 130, an information management unit 120, and a network interface unit 110, and the information management unit 120 monitors information. The unit 140 and the communication processing unit 150 is included.

The network interface unit 110 exchanges messages and packets with other OAM servers 11-1n and respective network equipments 21-2n by using a communication path established through the network 30.

The database 130 stores OAM information of each network device 21-2n managed by the OAM server 100, and provides corresponding OAM information at the request of the information manager 120.

In addition, the information manager 120 generates a hello message and a request message, and transmits them to the other OAM servers 11-1n and each network equipment 21-2n through the network interface unit 110, and transmits each network equipment ( 21-2n) and OAM information is extracted from messages transmitted from other OAM servers 11-1n, stored in the database 130, and provided by the administrator at the request.

In addition, the information manager 120 immediately provides the manager with specific OAM information set by the manager, for example, alarm information.

In addition, the information monitoring unit 140 of the information management unit 120 monitors the OAM information of each network equipment (21 ~ 2n) received through the message.

3 is an internal block diagram illustrating an information monitoring unit according to the present invention.

Referring to FIG. 3, the information monitoring unit 140 according to the present invention may include an alarm information monitoring unit 141, a log information monitoring unit 142, a security information monitoring unit 143, and a system information monitoring unit 144. Include.

The alarm information monitoring unit 141 collects and manages alarm information transmitted from each network device 21-2n.

The alarm information monitoring unit 141 may be implemented similarly to general SNMP processing, and extracts and collects alarm information from an OAM report message.

In addition, the alarm information monitoring unit 141 is provided so that the administrator can recognize when the alarm information set by the administrator is collected, so that the administrator can quickly respond to the problem occurred in the network equipment (21 ~ 2n). .

The log information monitoring unit 142 collects and manages log information transmitted from each network device 21-2n. Then, the log information of each collected network equipment (21 ~ 2n) is analyzed and provided to the administrator.

That is, since the network equipment 21-2n generally implements a system log information forwarding function, the log information monitoring unit 142 may collect log information through an OAM report message.

The security information monitoring unit 143 collects and manages security information transmitted from each network device 21-2n. Such security information is information transmitted when abnormal packet congestion or malicious chip or interference of each network device 21 to 2n is detected, and the security information monitoring unit 143 transmits each network device 21. If security information is sent via an OAM report message from ˜2n), it is desirable to immediately provide it to the administrator.

The system information monitoring unit 144 monitors state information of a system in which each OAM server 11-1n and each network device 21-2n are connected through the network 30.

In addition, the information monitoring unit 140 of the OAM servers 21 to 2n according to the present invention implements all the functions of the monitoring units 141, 142, 143, and 144, or at least one monitoring unit so as to suit their characteristics. Only the functions of 141, 142, 143, and 144 may be implemented.

4 is an internal block diagram illustrating a configuration of a communication processing unit according to the present invention.

Referring to FIG. 4, the communication processor 150 according to the present invention includes a connection manager 151 and an agent determiner 152.

The connection manager 151 sets a communication path for exchanging messages with other OAM servers 11-1n and respective network devices 21-2n through the network interface 110.

When the plurality of OAM servers 11 to 1n are connected through the network 30, the agent determination unit 152 may communicate with the agent OAM server and the subagent OAM server through communication between the respective OAM servers 11 to 1n. Determine.

At this time, a condition for determining the agent OAM server may be set as follows.

(1) When the administrator sets an arbitrary OAM server 11-1n as an agent OAM server, that is, two or more OAM servers 11-1n are connected through the network 30, and must be set as an agent OAM server. In this case, the MAC addresses or IP addresses of the respective OAM servers 11 to 1n are compared with each other to determine an OAM server having a large address as the agent OAM server, and when one OAM server is set as the agent OAM server, the corresponding OAM server. The remaining OAM servers 11-1n are determined as subagent OAM servers.

(2) When the agent OAM server needs to be set up automatically, the agent determination unit 152 of each OAM server 11-1n compares the MAC address or IP address of each OAM server 11-1n with each other. Automatically sets the largest OAM server (11 to 1n) as the agent OAM server.

The OAM servers 11 to 1n may have a hierarchical structure in order to extend network equipment 21 to 2n to manage OAM information.

5 is a diagram illustrating a hierarchical configuration of an OAM server according to the present invention.

Referring to FIG. 5, in a structure in which a plurality of OAM servers 11-1n are provided to manage OAM information of each network device 21-2n, one OAM server 11-1n is configured as an agent OAM server in a higher layer. If it is determined as (100), and the remaining agent OAM servers 11 to 1n in the lower layer are determined as subagent OAM servers 11 to 1n, a large number of network equipments (22 ~) have a hierarchical structure. 2n) can be managed.

At this time, if the hierarchical structure of each OAM server (11 ~ 1n) is extended, the administrator can manage the OAM information of the network equipment (21 ~ 2n) in multiple regions through one OAM server (1900) in one region. Can be.

That is, in order to manage the network equipment (21 ~ 2n) of several stations in one OAM server 100, as shown in Figure 5, the network between the agent OAM server 100 and other OAM server (11 ~ 1n) A hierarchical configuration is possible through the connection, and the agent OAM servers 11 to 1n of the lower layer function as the subagent OAM servers 11 to 1n for the agent OAM server 100 of the upper layer.

In addition, a plurality of monitoring units may be implemented in the information monitoring units of the respective OAM servers 11 to 1n, or one monitoring unit may be implemented.

For example, when one network device must be managed by one OAM server, the information monitoring unit of the OAM server, as shown in FIG. 3, preferably implements a function for monitoring all kinds of OAM information. .

However, when a plurality of OAM servers need to manage network equipment, it is preferable to implement a different monitoring function in each OAM server to distribute OAM information.

6 is an internal block diagram illustrating a configuration of network equipment according to an embodiment of the present invention.

Referring to FIG. 6, the network equipment 200 according to the present invention includes an OAM information storage unit 210, an information processing unit 220, and a network connection unit 230, and the information processing unit 220 includes a connection processing unit 221. ) And an information exchange unit 222.

The network connection unit 230 may exchange messages with each OAM server 11-1n and other network equipment 21-2n through the network 30.

The information processing unit 220 stores the OAM information generated in the network equipment 21-2n in the OAM information storage unit 210, and when a request message is transmitted from the OAM server 11-1n, the OAM information storage unit 210. Send OAM information stored in).

At this time, messages exchanged between the respective OAM servers 11-1n and the network equipments 21-2n may be exchanged in the form of packets, and the OAM information corresponds to alarm information, log information, security information, and system information.

When the network equipment 21-2n is connected to the network 30, the connection processor 221 establishes a communication path for exchanging messages between each OAM server 11-1n and other network equipment 21-2n. Set it. That is, when the network equipment 21-2n is connected to the network 30 and a message is transmitted from the OAM servers 11-1n, the network device 21-2n sets a communication path for exchanging messages with the corresponding OAM servers 11-1n.

When the request message is transmitted from the OAM servers 21 ˜ 2n, the information exchanger 222 transmits the OAM information stored in the OAM information storage unit 210 to the corresponding OAM servers 21 ˜ 2n.

At this time, the information exchange unit 222 may include the OAM information in the response message and transmit.

7 is a flowchart illustrating a message flow between an initial OAM server and network equipment according to an embodiment of the present invention.

Referring to FIG. 7, the OAM server 11 transmits a hello message to each network device 21 ˜ 2n connected through the network 30 in a broadcast manner (S 1).

In this case, the OAM server 11 may exchange messages with each network device 21-2n through a protocol such as the HELLO protocol.

That is, the OAM server 11 transmits a hello message to each network device 21-2n connected to the network 30, and when a hello response message is received from each network device 21-2n, the corresponding network device ( 21-2n) to start communication.

Here, each of the network equipments 21 to 2n may inform whether a TCP connection is possible, interface address information, ID information of the network equipment 21 to 2n, and types of OAM information that can be transmitted through the hello response message.

Then, the first network equipment 21 transmits the hello response message for the hello message transmitted from the OAM server 11 in a unicast manner (S 2).

If the OAM server 11 detects that the second network equipment 22 is connected through the network 30 in a state in which a communication path is established with the first network equipment 21 (S 3), the OAM server ( 11) transmits the hello message to each network equipment 21, 22 in a broadcast manner (S 4, S 5).

At this time, the first network equipment 21 discards the hello message received because the communication path with the OAM server 11 is established (S 6).

Then, the second network equipment 22 transmits the hello response message for the hello message transmitted from the OAM server 11 in a unicast manner (S7).

The OAM server 11 transmits a hello message indicating that it is an OAM server to the first and second network equipments 21 and 22 that have transmitted the hello response message (S 8 and S 9).

When the connection request message is transmitted from the first network equipment 21 (S10), the connection response message is transmitted, and a communication path is established with the first network equipment 21 (S11).

In addition, when a connection request message is transmitted from the second network equipment 22 (S 12), the connection response message is transmitted, and a communication path is established with the second network equipment 22 (S 13).

The first and second network equipments 21 and 22 store the OAM information in the OAM information storage unit 210 when the OAM information is generated while the communication path is established with the initial OAM server 11, and the OAM generated through the established communication path. The information is transmitted to the OAM server 11 through the OAM report message (S 14, S 15, 1 16).

The OAM server 11 collects and manages OAM information transmitted from each network device 21 or 22.

The OAM server 11 can be extended to a hierarchical structure through an agent / subagent.

In addition, the OAM server 11 provides the administrator to recognize when specific OAM information set by the administrator, for example, alarm information, is collected among the OAM information collected from each network device 21 or 22. To quickly respond to the problem that caused the alarm information.

8 is a flowchart illustrating a flow of a method of managing OAM information of a network device according to a preferred embodiment of the present invention.

Hereinafter, a case in which alarm information is managed by the agent OAM server 11 and log information is managed by the subagent OAM server 22 will be described with reference to FIG. 8.

First, the OAM information request message is transmitted to the network device in a state in which a communication path for exchanging messages with the first OAM server 11 and the first network device 21 determined as the agent OAM server is established (S20).

That is, the first OAM server 11 transmits an OAM information request message for requesting alarm information to the first network equipment 21.

In addition, the information exchange unit 222 of the first network equipment 21 searches for alarm information among the OAM information stored in the OAM information storage unit 210 in response to the received OAM information request message, and includes alarm information. The OAM report message is transmitted to the first OAM server 11 (S 21).

The information monitoring unit 140 of the first OAM server 11 extracts alarm information from the OAM response message transmitted from the first network equipment 21, stores the alarm information in the database 130, and provides the information to the manager.

In this case, the alarm information collection of the first OAM server 11 may be collected by transmitting the OAM information request message to the corresponding network equipment 21-2n according to the administrator's request, or periodically by transmitting the OAM information request message. Each network device 21-2n transmits each time alarm information is generated through an OAM report message, so that the OAM server 11 can collect alarm information.

When the first OAM server 11 receives the log information of the first network equipment 21 from the administrator, that is, the manager transmits log information of the first network equipment 21 to the first OAM server (the agent OAM server). 11), the first OAM server 11 transmits an OAM information request message for requesting log information to the second OAM server 12 which manages log information according to a request of an administrator (S 22). ).

When the second OAM server 12 receives an OAM information request message for requesting log information from the first OAM server 11, the second OAM server 12 transmits an OAM information request message for requesting log information to the first network equipment 21 ( S 23).

When the OAM information request message is received from the second OAM server 12, the information exchange unit 222 of the first network equipment 21 searches for log information among OAM information stored in the OAM information storage unit 210 and logs the log. The OAM report message including the information is transmitted to the second OAM server 12 (S 24).

The information monitoring unit 140 of the second OAM server 12 stores the OAM information transmitted from the first network equipment 21, that is, log information in the database 130, and includes an OAM report message including log information. Is transmitted to the first OAM server 11 (S 25).

In addition, the information monitoring unit 140 of the first OAM server 11 stores the log information transmitted from the second OAM server 12 in the database 130 and provides the administrator so that it can be recognized.

At this time, since the first OAM server 11 and the second OAM server 12 has only a function of monitoring one piece of OAM information in the information monitoring unit 140, it broadcasts from each network device 21-2n. When the OAM information is transmitted in a manner, only OAM information having a function implemented may be extracted and stored in the OAM information storage unit 210.

On the other hand, when the administrator changes the way to manage the OAM information through the first OAM server 11, which is an agent OAM server, for example, when changing the way to manage the log information to 'A' method, The OAM server 11 transmits an information change message indicating the 'A' method, which is the changed log information management method, to the second OAM server 12, which is a subagent OAM server (S 26).

When the second OAM server 12 receives the information change message from the first OAM server 11, the second OAM server 12 changes the method of managing log information to the 'A' method, and manages the log information with the first network equipment 21. An information change message indicating that the method is changed is transmitted (S 27).

When the information change message is received from the second OAM server 12, the first network equipment 21 changes the management method of the log information to the 'A' method, and changes the response message ACK to the second OAM server ( 12) (S 28).

In addition, the second OAM server 12 transmits a response message (ACK) indicating that the management method of the log information is changed to the 'A' method to the first OAM server 11 (S 29).

In this case, the first OAM server 11 may transmit to each network equipment 21-2n and each subagent OAM server 12-2n in a broadcast manner.

That is, the first OAM server 11 transmits the information changed by the administrator through a network 30 in a broadcast manner, so that each network equipment 21-2n and other OAM servers 11-1n are changed at the same time. Information can be received.

In addition, when OAM information changed from each network device 21-2n is transmitted, each OAM server 11-1n updates the OAM information stored in the OAM information storage unit 210, and is updated to the agent OAM server. It is desirable to transmit the OAM information so that the agent OAM server can maintain the optimal OAM information.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

As described above, according to the present invention, there is an effect that the administrator can manage the OAM information through a single server of various network equipment.

In addition, the amount of traffic generated in the existing method using SNMP, RMON, etc. can be minimized, and network equipment connected through a network can be automatically detected to collect / manage OAM information.

In addition, by extending each server in a hierarchical structure, the administrator can manage a variety of network equipment in multiple regions through a single server.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram illustrating a configuration of an information management apparatus of network equipment according to a preferred embodiment of the present invention.

Figure 2 is an internal block diagram illustrating the configuration of an OAM server according to a preferred embodiment of the present invention.

3 is an internal block diagram illustrating an information monitoring unit according to the present invention.

4 is an internal block diagram for explaining a configuration of a communication processing unit according to the present invention;

5 is a diagram illustrating a hierarchical configuration of an OAM server according to the present invention.

6 is an internal block diagram illustrating a configuration of network equipment according to an embodiment of the present invention.

7 is a flowchart illustrating a message flow between an initial OAM server and network equipment according to a preferred embodiment of the present invention.

8 is a flowchart illustrating a flow of a method for managing OAM information of a network device according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

11 ~ 1n: OAM server 110: network interface unit

120: information management unit 130: database

140: information monitoring unit 141: alarm information monitoring unit

142: log information monitoring unit 143: security information monitoring unit

144: system information monitoring unit 150: communication processing unit

151: connection management unit 152: agent determination unit

21 ~ 2n: network equipment 210: OAM information storage unit

220: information processing unit 221: connection processing unit

222: information exchange unit 230: network connection unit

Claims (19)

In the network equipment management system, At least one network device generating OAM (Operations, Administration and Maintenance) information, and transmitting a response message including the OAM information when an OAM information request message is received; And at least one server for transmitting an OAM information request message through the network and extracting and managing OAM information from the response message when the network equipment is connected through a network. The method of claim 1, wherein each server, A network interface unit for connecting to each of the network equipment and another server through the network; A communication processor configured to set a communication path for exchanging messages when the network equipment is connected through the network interface unit; When the network equipment is connected through the network interface unit, information monitoring for transmitting an OAM information request message through the communication path, storing the OAM information extracted from the response message, and providing the stored OAM information at the request of an administrator. part; Network equipment management system including a database for storing the OAM information. The method of claim 2, wherein the information monitoring unit, And at least one of alarm OAM information, security OAM information, log OAM information, and system OAM information. The method of claim 2, wherein the communication processing unit, Network equipment management system, characterized in that for setting the communication path with each of the network equipment, using the HELLO protocol. The method of claim 2, wherein the communication processing unit, Comparing interface IP address information set to other servers connected through the network interface unit, determining that the server having the largest IP address value functions as an agent server, and determining that the remaining server functions as a subagent. Network equipment management system characterized by. The method of claim 2, wherein the information monitoring unit, If only the specific OAM information monitoring function is implemented in the server, network equipment management system, characterized in that for extracting only the specific OAM information from the response message sent from the network equipment. The method of claim 1, wherein the network equipment, A network connection unit connecting with other network equipment and the respective servers through the network; An information processing unit which generates OAM information of the network equipment and transmits a response message including the OAM information when an OAM information request message is received from each server through the network connection unit; Network equipment management system including an OAM information storage unit for storing the generated OAM information. The method of claim 7, wherein the information processing unit, A communication connection processor configured to set a communication path for transmitting OAM information according to a message transmitted from each server through the network connection unit; And receiving an OAM information request message from each server, and generating and transmitting a response message including the stored OAM information. The method of claim 8, wherein the information exchange unit, And if the OAM information request message is a specific OAM information request message, search for the specific OAM information among the stored OAM information, and transmit a response message. The method of claim 8, wherein the communication connection processing unit, And when the message is transmitted from the server according to the HELLO protocol, transmits a communication request message to the server, and connects the communication path. The method of claim 1, wherein each server, If one server functions as an agent server, the other server is configured in a hierarchical structure to function as a subagent server. In the information management method of the system managing at least one or more network equipment, Establishing a communication path for exchanging messages when detecting at least one network device to which at least one server is connected through a network; Generating and storing OAM information by the network equipment; Sending, by the server, an OAM information request message to each of the network equipment through the communication path; When the network equipment receives the OAM information request message, transmitting a response message including the stored OAM information; And managing, by the server, the network equipment by extracting the OAM information from the response message. The method of claim 12, When the administrator of the network equipment changes the OAM information management scheme through the server, transmitting, by the server, an information change message including the changed OAM information management scheme information to the network equipment; And changing, by the network equipment, an OAM information management scheme according to the information change message, and transmitting a response message to the server. The method of claim 12, wherein the establishing of the communication path comprises: Transmitting each hello message to a network device connected through a network; When the network device receives the hello message, transmitting a hello response message including communication path information to the server: And setting, by the server, a communication path with the network device according to the communication path information included in the hello response message. The method of claim 14, wherein the communication path information, And at least one or more pieces of information of communication connection possible information, communication interface information, ID information, or type information of the generated OAM information of the network equipment. The method of claim 12, wherein the OAM information, And managing at least one or more of alarm OAM information, security OAM information, log OAM information, or system OAM information. The method of claim 12 or 16, wherein each server, And managing at least one OAM information of the respective OAM information. The method of claim 12, If at least one server is included, determining one server to function as an agent server, and determining another server to function as a subagent server. The method of claim 18, wherein the agent server, And comparing the interface IP address information set in each of the servers with each other and determining that the server having the largest IP address value is the agent server.