JP2002084279A - System and method for managing snmp network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network management system that allows an SNMP(Simple Network Management Protocol) agent to take proper countermeasures on the occurrence of a fault in a network. SOLUTION: An SNMP manager 1 detects a fault on the network on the basis of MIB(Management Information Base) information from the SNMP agent 2, updates network information corresponding to a fault on the network in the MIB information stored in a built-in MIB database, instructs the SNMP agents 2-6 to update the MIB information, and the SNMP agents 2-6 update the stored MIB information in response to an update instruction of the MIB information from the SNMP manager.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an SNMP network management system and method for managing a network using an SNMP protocol in a TCP / IP network.

[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 a single 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 B information, and it was necessary for the network administrator to analyze the MIB information, 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]

In order to achieve the above object, an SNMP network management system according to the present invention comprises an SNMP manager for storing network information in a built-in MIB database and a plurality of SNMP managers for notifying the SNMP manager of the network information. The SNMP manager, based on the network information from the SNMP agent, a failure detecting means for detecting a failure on the network, and out of the network information stored in the MIB database First network information updating means for updating network information corresponding to the detected failure on the network, and providing the SNMP agent with network information based on the detected failure on the network. Network information update instructing means for instructing new information, and the SNMP agent comprises second network information updating means for updating the held network information in response to an update instruction of network information from the SNMP manager. .

In particular, it is preferable that the SNMP agent further includes a network information update notifying means for notifying another SNMP agent of the update of the network information.

Further, the SNMP network management method according to the present invention provides an SNMP manager for storing network information in a built-in MIB database;
A procedure for detecting a failure on a network based on the network information from the SNMP agent, wherein the SNMP manager comprises:
Extracting, from the MIB database, network information corresponding to the detected fault on the network from among the network information stored in the MIB database; And the SNM
The SNMP agent includes a procedure for instructing the P agent to update network information, and a procedure for updating the held network information in the SNMP agent in response to the network information update instruction from the SNMP manager.

In particular, it is preferable that the SNMP agent has a network procedure for notifying another SNMP agent of the update of the network information.

[0009]

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 6 operating on network devices such as routers and hubs
And 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. MIB for storing network information (MIB information)
It comprises a database 103 and a TCP / IP processing unit 104.

FIG. 3 is a block diagram showing the configuration of the SNMP agent. The SNMP agent 2 shown in FIG.
It comprises an MP library 202, an MIB database 203, a transmission / reception control unit 204, a TCP / IP processing unit 205, and a network application 206. Since the SNMP agents 3 to 6 have the same configuration, the following description focuses on the SNMP agent and the SNMP manager 1.

The SNMP manager 1 sends the MIB information to the MI
When the information is stored in the B database 103, the SNMP manager 101 of the SNMP manager 1 issues a request at predetermined time intervals, for example. The SNMP library 102
When a request for MIB information is issued by the SNMP management unit 101, an SNMP message (request message) for requesting MIB information is generated. The MIB information is provided with an MIB number according to its contents.
The NMP library 102 generates a request message including an MIB number corresponding to required MIB information.

The TCP / IP processing unit 104 adds the address, port number, and the like 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 stores the MIB information generated by the SNMP agent processing unit 201 in the MIB database 203 and generates an SNMP message (response message) including the MIB information. This response message is transmitted to the T
It is sent to CP / IP processing section 205.

The TCP / IP processing unit 205 sends the response message to the TCP / IP network 7 after adding the address, port number, and the like 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 the MIB information included in the response message into the MIB database 10.
Store in 3. Thus, the MIB database 1
03 stores MIB information from all SNMP agents existing on the TCP / IP network 7.

When a failure occurs on the TCP / IP network 7, one of the SNMP agents
A message (failure message) is notified to the MP manager 1. For example, in FIG. 1, when a failure occurs in the network between the SNMP agent 2 and the SNMP agent 3, one of the SNMP agents 2 and 3 notifies the SNMP manager 1 of a failure message.

When the SNMP agent 2 notifies a failure message, the SNMP library 202 generates a failure message. This failure message is sent to the TCP / IP processing unit 205 via the transmission / reception control unit 204. The TCP / IP processing unit 205 adds the address, port number, and the like of the other party's SNMP manager 1 to the failure message and sends the message to the TCP / IP network 7.

The SNMP library 102 stores MIB information corresponding to the detected fault in the MIB database 1.
03 and updated.

The TCP / IP processing unit 104 of the SNMP manager 1 receives the failure message sent from the SNMP agent 2. SNMP library 10
2 detects the occurrence of a failure by analyzing the failure message received by the TCP / IP processing unit 104. If a failure is detected, the SNMP library 10
2 extracts MIB information corresponding to the failure from the MIB database 103 and updates it. Further, the SNMP library 102 generates a message (update instruction message) for instructing the SNMP agent to update the MIB information based on the detected failure. The TCP / IP processing unit 104 adds an address, a port number, and the like of the other party's SNMP agent to the update instruction message generated by the SNMP library 102,
The packet is sent to the TCP / IP network 7. The update instruction message may be sent to only some SNMP agents, or may be sent to all SNMP agents.

The TCP / IP processing unit 205 of the SNMP agent 2 receives the update instruction message sent from the SNMP manager 1. The update instruction message is sent to the SNMP library 202 via the transmission / reception control unit 204, and the SNMP library 202 analyzes the content of the update instruction message and extracts MIB information corresponding to the update instruction message from the MIB database 203. And update.

The SNMP library 202 transmits the update instruction message to the transmission / reception control unit 204, the TCP / I
The packet is sent to another SNMP agent via the P processing unit 205. The other SNMP agent responds to the update instruction message from the SNMP agent 2 or the update instruction message from the SNMP manager 1 by the SNMP.
Similarly to the P agent 2, MIB information corresponding to the update instruction message is extracted from the MIB database and updated.

As described above, the MIB information held by the SNMP agent is updated, so that the SNMP
When the network application 206 or the like performs communication, the transmission / reception control unit 204 of the agent 2 recognizes the state of the communication partner and the state of the route to the communication partner based on the updated MIB information, and performs communication based on these states. If a problem is expected to occur, transmission and reception can be stopped or suspended. That is, 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.

Further, the TCP / IP processing section may notify the transmission source that the transmission has been stopped or other measures have been taken due to a failure, so that the transmission source can also know the occurrence of the failure. Becomes

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.

[0026]

As described above, according to the present invention, each SNMP
The agent 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 2-6 SNMP agent 7 TCP / IP network 10 Network management system 101 SNMP management unit 102 SNMP library 103 MIB database 104 TCP / IP processing unit 201 SNMP agent processing unit 202 SNMP library 203 MIB database 204 Transmission / reception control unit 205 TCP / IP processing unit 206 Network application

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (4)

[Claims] An SNMP manager for storing network information in an MIB database containing the network information;
In an SNMP network management system having a plurality of SNMP agents for notifying the P manager of the network information, the SNMP manager comprises: a failure detection unit for detecting a failure on a network based on the network information from the SNMP agent; A first network information updating unit that updates network information corresponding to the detected failure on the network among the network information stored in the MIB database, based on the detected failure on the network, Network information update instructing means for instructing the SNMP agent to update network information, wherein the SNMP agent stores the network information in response to the network information update instruction from the SNMP manager. Network management system characterized in that it comprises a second network information updating means for updating the network information that you are. 2. The SNMP network management system according to claim 1, wherein said SNMP agent further comprises a network information update notifying unit for notifying another SNMP agent of an update of said network information. 3. An SNMP manager for storing network information in a built-in MIB database;
An SNMP network management method comprising: a plurality of SNMP agents for notifying a P manager of the network information; and a step of detecting a failure on a network based on the network information from the SNMP agent in the SNMP manager; A step of extracting, from the MIB database, network information corresponding to the detected failure on the network from among the network information stored in the MIB database in the SNMP manager; A step of instructing the SNMP agent to update network information based on the failure of the SNMP agent; Updating the held network information in response to a network information update instruction. 4. The SNMP network management method according to claim 3, wherein the SNMP agent further comprises a step of notifying another SNMP agent of the update of the network information.