JP2001333072A - Snmp network management system and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network management system where an SNMP (Simple Network Management Protocol) agent can take a proper measure on the occurrence of a network fault. SOLUTION: The network management system 10 has an SNMP manager 1 that stores MIB(Management Information Base) information to an MIB database 6 and SNMP agents 2-5 that informs the SNMP manager 1 about the MIB information. The SNMP manager 1 transmits the MIB information stored in the MIB database 6 to the SNMP agents 2-5 in response to a request from the SNMP agents 2-5, and the SNMP agents 2-5 request the SNMP manager 1 on the distribution of the MIB information stored in the MIB database 6, collect the MIB information sent from the SNMP manager 1 in response to the request and control communication managed by the SNMP agents according to the MIB information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an SNMP network management system that manages a TCP / IP network using an SNMP protocol.

[0002]

2. Description of the Related Art In communication on a TCP / IP network, SNMP (Simple Network Management Protocol) is widely used as a protocol for managing the network. In this SNMP-based network management system, network management is performed by one SNMP manager that acquires and manages network information and a plurality of SNMP agents that operate on network devices such as routers and hubs and generate network information. Done. Specifically, the SNMP manager
Network information (MI
B (Management Information Base) information), and the SNMP agent responds to this request with the MI.
Generate and notify B information. The MIB information includes a load on the network, an error occurrence rate, information for each protocol, information of a held table, and the like, and is stored in the MIB database.

[0003]

However, in a conventional SNMP-based network management system,
Only the MIB information is stored in the MIB database.
It was not possible to take appropriate measures according to the IB information, and it was necessary for the network administrator to analyze the MIB to find a network failure and take appropriate measures such as failure recovery. Therefore, there is a demand for a network management system capable of taking appropriate measures in the event of a network failure by an SNMP agent.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a network management system capable of taking appropriate measures at the time of a network failure by an SNMP agent.

[0005]

To achieve the above object, an SNMP network management system according to the present invention comprises: an SNMP manager for storing network information in an MIB; and a plurality of SNMP agents for notifying the SNMP manager of the network information. The SNMP manager further comprises: a MIB publishing unit that sends network information stored in the MIB database in response to a request from the SNMP agent. MIB requesting means for requesting and collecting network information stored in the MIB database, and transmission / reception for controlling communication managed by the SNMP agent according to the network information collected by the MIB collecting means. Constituted by a control means.

In this case, it is preferable that the transmission / reception control means of the SNMP agent controls the communication according to a communication partner managed by the SNMP agent and a state of a path to the communication partner.

Further, according to the SNMP network management method of the present invention, an SNMP network storing network information in an MIB is provided.
And a plurality of SNMP agents that notify the SNMP information of the network information to the SNMP manager.
A step of requesting the SNMP manager for network information stored in the MIB database; a step of transmitting the network information stored in the MIB database in the SNMP manager; and a step of transmitting the network information stored in the SNMP database from the SNMP manager. It comprises a procedure for collecting network information to be transmitted and a procedure for controlling communication managed by the SNMP agent in the SNMP agent according to the collected network information.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on one embodiment shown in the drawings. FIG. 1 is a diagram showing a configuration example of a network management system according to the present invention. The SNMP network management system 10 shown in FIG.
/ IP network 7 is managed, and one S
NMP manager 1 and a plurality of SNMP agents 2 to 5 operating on network devices such as routers and hubs
And MIB storing network information (MIB information)
A database 6 is provided.

FIG. 2 is a block diagram showing the configuration of the SNMP manager. SNMP manager 1 shown in FIG.
Is the SNMP management unit 101, the SNMP library 10
2. It comprises an MIB publishing unit 103 and a TCP / IP processing unit 104. Among these components, the MIB publishing unit 103 corresponds to an MIB publishing unit.

FIG. 3 is a block diagram showing a configuration of the SNMP agent. The SNMP agent 2 shown in FIG.
It comprises an MP library 202, an MIB collection unit 203, a transmission / reception control unit 204, a TCP / IP processing unit 205, and a network application 206. Among these configurations, the MIB collection unit 203 corresponds to the MIB collection unit, and the transmission / reception control unit 204 corresponds to the transmission / reception control unit. Note that the SNMP agents 3 to 5 have the same configuration, and the operation of the SNMP agent 2 will be described below.

When the MIB information is stored in the MIB database 6, the SNMP manager 10 of the SNMP manager 1
1 issues the request every predetermined time, for example. SNM
When a request for MIB information is issued by the SNMP management unit 101, the P library 102 generates an SNMP message (request message) for requesting MIB information. The MIB information is provided with an MIB number according to the content, and the SNMP library 102 generates a request message including the MIB number corresponding to the required MIB information.

The TCP / IP processing unit 104 adds the address and port number of the other party's SNMP agent 2 to the request message generated by the SNMP library 102 and then transmits the request message to the TCP / IP network 7. To send to.

The TCP / IP processing unit 205 of the SNMP agent 2 receives the request message sent from the SNMP manager 1. This request message is sent to the SNMP library 202 via the transmission / reception control unit 204, and the SNMP library 202
Analyzes the contents of the request message and instructs the SNMP agent processing unit 201 to generate MIB information. The SNMP agent processing unit 201 generates MIB information according to the instruction. The SNMP library 202 generates an SNMP message (response message) including the MIB information generated by the SNMP agent processing unit 201. This response message is sent to the TCP / I
It is sent to the P processing unit 205.

The TCP / IP processing unit 205 sends the response message to the TCP / IP network 7 after adding the address and port number of the other party's SNMP manager 1 to the response message.

The TCP / IP processing unit 104 of the SNMP manager 1 receives the response message sent from the SNMP agent 2. The SNMP library 102 analyzes the response message received by the TCP / IP processing unit 104, and stores MIB information included in the response message in the MIB database 6. In this manner, the MIB database 6 stores all the S existing on the TCP / IP network 7.
MIB information from the NMP agent is stored.

When the MIB information is stored in the MIB database 6, the SNMP agent 2 can collect the MIB information stored in the MIB database 6. In other words, the MIB collection unit 203 of the SNMP agent 2 periodically (for example, at every predetermined time) requests the SNMP information stored in the MIB database 6.
A message (hereinafter, referred to as “MIB open request message”) is generated. The MIB disclosure request message may request all MIB information stored in the MIB database 6.
SNM from the MIB information stored in the database 6
Only the MIB information related to the P agent 2 may be requested.

M generated by the MIB collection unit 203
The IB disclosure request message is added with the address and port number of the other party's SNMP manager 1 by the TCP / IP
It is sent to the P network 7.

The MIB disclosure request message sent to the TCP / IP network 7 is received by the TCP / IP processing unit 104 of the SNMP manager 1,
The data is taken into the IB disclosure unit 103. MIB publishing unit 103
Analyzes the content of the captured MIB disclosure request message, reads MIB information from the MIB database 6, and generates an SNMP message (MIB disclosure response message) including the read MIB information.

This MIB release response message is:
By the TCP / IP processing unit 104, the SN
After the address and port number of the MP agent 2 are added, the packet is sent to the TCP / IP network 7.

The MIB release response message sent to the TCP / IP network 7 is received by the TCP / IP processing unit 205 of the SNMP agent 2,
The data is captured by the MIB collection unit 203. MIB collection unit 20
Numeral 3 analyzes the content of the captured MIB disclosure response message and holds MIB information included in the MIB disclosure response message.

When the network application 206 or the like performs communication, the transmission / reception control unit 204
Based on the MIB information held in 03, the state of the communication partner and the state of the route to the communication partner are recognized. If it is expected that a communication problem will occur from these states,
Stop and suspend transmission / reception. If no problem is expected to occur in the communication, the transmission / reception control unit 204
Performs normal communication control as it is.

As described above, in the SNMP network management system 10, the MIB information sent from each of the SNMP agents 2 to 5 and stored in the MIB database 6 is made public. Can be collected. That is, each SNMP agent 2
5 can collect MIB information generated by other SNMP agents, so that when a failure occurs, appropriate measures can be taken according to the state of the network, such as suspension of transmission and reception and suspension.

The embodiment of the present invention has been described with reference to the drawings. However, it is apparent that the present invention is not limited to the matters described in the above embodiments, and that changes, improvements, and the like can be made based on the description in the claims. For example, in the above-described embodiment, M of the SNMP agent 2
The IB collection unit 203 periodically generates an MIB disclosure request message, but every time communication control is performed by the transmission / reception control unit 204, generates an MIB disclosure request message in accordance with an instruction from the transmission / reception control unit 204. You may.

[0024]

As described above, according to the present invention, each SNMP
The agent can collect network information from another SNMP agent, and can take appropriate measures in the event of a network failure.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a network management system according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of an SNMP manager.

FIG. 3 is a block diagram illustrating a configuration of an SNMP agent.

[Explanation of symbols]

 Reference Signs List 1 SNMP manager 2-5 SNMP agent 6 MIB database 10 Network management system 101 SNMP management unit 102 SNMP library 103 MIB disclosure unit 104 TCP / IP processing unit 201 SNMP agent processing unit 202 SNMP library 203 MIB collection unit 204 Transmission / reception control unit 205 TCP / IP processing unit 206 Network application

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B089 GB02 GB08 HB02 HB06 JA35 JB14 KA12 5K030 GA14 HA08 HC01 HC13 HD03 JA10 KA05 KA07 MA01 MB01 MC07 MC09 5K033 AA06 BA04 BA08 DA01 DB18 DB20 EA04 EA07

Claims (3)

[Claims] 1. An SNMP manager that stores network information in an MIB database, and a plurality of SNMPs that notify the SNMP manager of the network information.
In an SNMP network management system having an agent, the SNMP manager, in response to a request from the SNMP agent,
An SNMP publishing unit for transmitting network information stored in the IB database; wherein the SNMP agent requests and collects the network information stored in the MIB database from the SNMP manager.
A network management system comprising: an IB collection unit; and a transmission / reception control unit that controls communication managed by the SNMP agent in accordance with network information collected by the MIB collection unit. 2. The transmission / reception control means of the SNMP agent according to claim 1, wherein the communication is controlled according to a communication partner managed by the SNMP agent and a state of a route to the communication partner. Network management system. 3. An SNMP manager for storing network information in an MIB database, and a plurality of SNMPs for notifying the SNMP manager of the network information.
An SNMP network management method having an agent, wherein the SNMP agent requests the SNMP manager for network information stored in the MIB database; and the SNMP manager stores the network information stored in the MIB database. Sending the SNMP agent, collecting the network information sent from the SNMP manager in the SNMP agent, and controlling the communication managed by the SNMP agent in the SNMP agent according to the collected network information. A network management method.