KR100770920B1 - Method for managing simple network management protocol based network system using management information base array - Google Patents

Abstract

The present invention provides a simple network management protocol based network system management method using an array of management information bases, and has similar characteristics in order to reduce the number of complex and variable management information bases (MIBs) in a simple network management protocol (SNMP) based network system. Branching MIB into one category, and using it as a management information base, and using the management information database array structure that lists the details inside, multiple simple network management protocol request and simple network management protocol response Allows you to manage information. The present invention can reduce the number of management information base in the simple network management protocol-based network system and can adjust the variable characteristics can significantly reduce the number of simple network management protocol request and simple network management protocol response.

Simple Network Management Protocol (SNMP), Management Information Base (MIB), Array

Description

METHODO FOR MANAGING SIMPLE NETWORK MANAGEMENT PROTOCOL BASED NETWORK SYSTEM USING MANAGEMENT INFORMATION BASE ARRAY}             

1 is a view showing the configuration of a simple network management protocol (SNMP) based network system to which the present invention is applied;

2 is a view showing a simple network management protocol (SNMP) message format according to the prior art;

3 is a diagram illustrating a simple network management protocol (SNMP) message format having a management information base (MIB) arrangement according to an embodiment of the present invention.

The present invention relates to a network system based on the Simple Network Management Protocol (hereinafter referred to as "SNMP"), and in particular, using an arrangement of Management Information Base (hereinafter referred to as "MIB"). The present invention relates to a method of managing a network system based on a simple network management protocol.

In general, network devices such as Asynchronous Transfer Mode (ATM) switch (S / W), router, router, Ethernet switch, hub, etc. It is managed remotely by a connected Manager. Early Internet network management simply provided functions such as measuring the response time or information on whether the other party's host is operating. However, with the enormous increase in network equipment connected to the Internet and the complexity of the network configuration, a new standardized protocol for managing managers and network equipments in these network systems has been required.

An example of such a standardized protocol is SNMP. SNMP is a protocol for monitoring and integrating network management and network devices and their operations, and is not necessarily limited to TCP / IP (Transport Control Protocol / Internet Protocol) networks. SNMP-based network management is basically performed by exchanging specific information between two data link entities, an SNMP manager and an SNMP agent.

In SNMP-based network management, the SNMP manager sends a request message (Request PDU (Protocol Data Unit)) to the SNMP agent at the user's request as the subject of the operation, and receives the response message from the SNMP agent. It does work as a structure. The SNMP manager can be located on a server or a personal computer, and the SNMP agent resides on a target system, which is a network device such as a router or a PC. The SNMP agent is generally in a standby state, receives a request message from an SNMP manager, processes information managed by the SNMP manager, and transmits a response message.

When a specific information is exchanged between an SNMP manager and an SNMP agent, a collection of objects corresponding to specific information and resources to be managed on the network is called a MIB. Therefore, managing a network system means that a specific value is taken from the MIBs provided by the managed network devices and the status of the device is changed or the value is changed. Therefore, SNMP-based management can be referred to as MIB-based management. . The use of such MIB can achieve the standardization and management of access between SNMP manager and SNMP agent under SNMP base.

SNMP can use either a standard MIB or a private MIB to manage network devices. If a network device is more focused on system management, configuration, and control than network status or statistics management, the private MIB is much more important. Therefore, the private MIB can be complicated according to the characteristics of the network device, and the contents are also complicated and variable because the characteristics are changed each time the version of the network device is changed. In addition, since a single SNMP request and an SNMP response are required to read and write a MIB, many SNMP requests and SNMP responses are required for various MIBs, so that a lot of network traffic and time are required, and overall reliability is inferior. .

Accordingly, an object of the present invention is to provide a method for managing a network system using a management information base array (MIB Array) in a network system based on a simple network management protocol (SNMP).

In order to achieve these objectives, the present invention is to group MIBs having similar characteristics into one category and to list details therein by using them as one MIB to reduce the number of complex and variable MIBs in an SNMP-based network system. Use MIB array structure. Therefore, we propose a method to manage a large number of information in one SNMP request and SNMP response. The present invention can reduce the number of MIBs in the SNMP-based network system and adjust the variable characteristics can significantly reduce the number of SNMP requests and SNMP responses.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now 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. Terms to be described later are defined in consideration of functions in the present invention, which may vary according to a user or a custom, and the definitions should be made based on the contents throughout the present specification.                     

1 is a view showing the configuration of a simple network management protocol (SNMP) based network system to which the present invention is applied, the manager and agent of the network system is commonly referred to as the Simple Network Management Protocol (hereinafter referred to as "SNMP"). ) To communicate.

Referring to FIG. 1, an SNMP manager 10 is connected to an INTERNET / INTRANET 30 to remotely manage an SNMP agent 20 connected to the INTERNET / INTRANET 30. can do. The SNMP manager 10 may be implemented as a personal computer (PC), and the SNMP agent 20 may include an ATM switch (S / W), an Ethernet switch (S / W), a router, a hub ( Hub).

And, as shown in Figure 1, SNMP basically manages the network in three operations. In brief operation, GET is a request message for the SNMP manager to get the value of the object in the SNMP agent, SET is a request message for the SNMP manager to change the value in the SNMP agent, TRAP is a specific situation of the SNMP agent This message informs the SNMP manager. And GET-NEXT allows you to get the next index value of the object value specified by the SNMP manager or the next index value if the specified object is a table.

In this case, the object used in the SNMP-based network system is a specific value for specific information and resources to be managed in the management information base (MIB) provided by the network devices, and the SNMP manager and the SNMP agent. It is the data of SNMP messages sent and received between.                     

Accordingly, as shown in FIG. 1, the SNMP manager and the SNMP agent determine the state of the network device by sending and receiving the three messages as a protocol data unit type (PDU Type) according to a request or a response. It is possible to instruct and perform certain operations.

The present invention is to implement a method for managing a network system using a MIB array in a network system based on SNMP configured as shown in FIG.

2 and 3, FIG. 2 is a view showing an SNMP message format according to the prior art, and FIG. 3 is a view showing an SNMP message format having an MIB arrangement according to an embodiment of the present invention. In addition, the MIB arrangement implemented to manage the network system according to the present invention has a configuration as shown in FIG.

Referring to FIG. 2, the SNMP message format according to the related art is a version field for matching an SNMP version between an SNMP manager and an SNMP agent system, and communication between both systems having an encryption function for minimal authentication procedure. It consists of a community field for matching names, a protocol data unit type field (PDU Type Field) that is allowed by SNMP upon request or response, and an SNMP data field.

As shown in FIG. 2, in the prior art, only data related to one MIB is transmitted in the SNMP data field according to a request or a response. Therefore, if you want to read an entire table that contains many rows, such as a routing table, you must send and receive numerous request and response messages.

In the present invention for solving the above-described problems of the prior art, the SNMP data field is subdivided as shown in FIG. Therefore, the existing MIB can be divided into several large categories, each category becomes a single MIB, and the number of complex and variable MIBs can be reduced, and the MIB array structure can be used to vary multiple detail yields for one MIB. It can be added and managed.

Looking at the SNMP data field structure having a MIB array according to the present invention in more detail with reference to Figure 3, the data type is an octet string (Octet String) can transmit any value from 0 to 255, to distinguish each item Send by inserting NULL between each item. Therefore, there should be no NULL data in the middle of the item values to be transmitted.

In order to list and transmit a plurality of details in an SNMP data field having a MIB array structure according to the present invention, a plurality of details should be merged into one data packet. To this end, the SNMP manager and the SNMP agent that want to transmit the SNMP message implement and call a function (hereinafter, referred to as "merge function") that adds the data packet to one shared buffer. The merged function is then merged into a single data packet in a MIB array structure according to the present invention, and the merged data packet is loaded in the SNMP data field area and transmitted to the counterpart. Then, the receiving side of the SNMP message calls a function (hereinafter referred to as an "extraction function") that extracts each item using the NULL delimiter from the merged data in the SNMP data field area. Then, a plurality of detailed items are extracted using the called extraction function to perform a corresponding task.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention manages a plurality of sub-items with a single MIB in a network system based on SNMP, thereby allowing access to more detailed information, and newly reconfiguring the MIB itself when updating sub-items. There is an advantage that can be easily changed without having to. In addition, even if you want to manage objects such as tables as a whole, you can set desired values with one request and response, so you can provide SNMP network system management method that can access more contents stably, quickly and easily. There is this.

Claims (4)

In a network system management method for transmitting and receiving using a simple network management protocol message between a simple network management protocol manager and a simple network management protocol agent, Merging a plurality of details related to a request message to be transmitted from one of the manager and the agent, the transmitting entity to the other entity; Loading the merged detailed items into a data field area of the request message in a management information database arrangement and transmitting the merged detailed items to a receiving entity; Receiving, by the receiving entity, the request message and extracting the loaded details; Merging the response data corresponding to the extracted sub-items, loading the received entity into a management information base array structure in the data field area of the response message corresponding to the request message, and transmitting the response data to the transmitting entity; Network system management method characterized in that. The method of claim 1, The process of loading and transmitting the request message and the response message, Merging the detailed items of the management information database array structure into a single shared buffer by calling a merge function, and forming one data packet; And loading the data packet into a data field area of the request message. The method of claim 1, The management information base arrangement structure, And a separator for dividing each subitem between each subitem loaded in the data field area of each of the request message and the response message.        The method of claim 1,       The extraction process, And extracting each of the detailed items using a separator inserted between the detailed items loaded in the request message.

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