JP2003152720A - Network management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network management system that manages all of a plurality of devices to be managed in real time while relieving a processing load of a management station attended with increase in the devices to be managed and management information items. SOLUTION: The management station 100 attaches a designation key generated by a designation key generating section 108 to a Set Request message and broadcasts the resulting message when setting a definition condition of Trap message transmission of a device 101 to be managed by using the Set Request message. The device 101 to be managed uses a designation key analysis section 114, decides a transmission right of the Trap message on the basis of the designation key and internal information and stores the transmission right of the Trap message to a management information storage device 109 together with the definition condition in the Set Request message. The device 101 to be managed transmits the Trap message to the management station 100 only when the definition condition of the Trap message transmission includes the transmission right.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an SNMP (Simple
The present invention relates to a network management system for performing network management using a network management protocol, and particularly to a network management system that monitors the occurrence of a network failure and minimizes the damage when the failure occurs.

[0002]

2. Description of the Related Art As networks become more complex and larger in scale, it is becoming difficult to manually manage computers and communication devices. Therefore, SNMP (Simple N
A network management protocol called "etworkManagement Protocol" provides a method for gathering statistical information from communication devices installed in a wide area in a management station and quickly and accurately detecting a failure.

FIG. 2 is a schematic diagram showing network management by SNMP. Management station 200 is SNMP
As a manager, the managed device 201 functions as an SNMP agent. The SNMP manager 202
It has five functions: failure management, account management, communication device management, performance management, and security management. The managed device 201 uses the management information base (Management Information) as statistical information to be provided to the SNMP manager 202.
mation base; MIB) 204.

The SNMP manager 202 obtains statistical information by using at least one of polling and Trap message. At this time, the SNMP is UDP (User Data).
Since the (gramProtocol) protocol is used, the reliability of communication is not guaranteed.

In network management using polling, the SNMP manager 202 requests statistical information of the managed device 201 by periodically transmitting a Get Request message to the SNMP agent 203, and the SN
The MP agent 203 acquires statistical information from the management information 204 in response to a request from the management station 200, and sends a Get Response message.

On the other hand, in the network management using the Trap message, when the definition condition set in the management information 204 occurs in the managed device 201, the event is notified to the SNMP manager 202 and polling is performed. Higher real-time monitoring can be performed compared to the method.

Further, the SNMP manager 202 sets the MIB variable that can be changed in the management information 204,
You can also send a Set Request message. One of the usage methods is to set the Trap message transmission of the SNMP agent 203 to the definition event or the definition condition detected by the SNMP agent 202.

[0008]

However, the above S
In network management using NMP, the processing load on the SNMP manager increases as the statistical information to be managed and the target managed devices increase. In other words, if management is performed by polling the Get Request message in a large-scale network with many managed devices, the processing load of the SNMP manager increases, and the polling cycle of the Get Request message becomes long, so real-time network management is possible. There was a problem that it would be difficult.

In the same environment, even when network management is performed using Trap messages, if Trap messages occur at the same time, traffic will concentrate at the management station, and the processing load of the SNMP manager will increase. This can be solved by designating the managed device transmitting the Trap message by the Set Request message, but in fact, the definition condition of the Trap message generated in the managed device not under the control of the management station cannot be acquired. Therefore, in order to comprehensively manage the managed devices, it is necessary to switch the managed devices using the Set Request message, and eventually, the same problem as the network management by polling the Get Request message occurs.

Therefore, conventionally, a large-scale network has been
In order to manage by NMP, it is necessary to adopt a high-performance dedicated device or install a plurality of SNMP managers to distribute the load.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a network management system that manages the entire network in real time while suppressing the processing load of the SNMP manager.

[0012]

In order to solve the above-mentioned problems, a network management system according to claim 1 of the present invention provides a management device for broadcasting data and a management device for the management device via a communication network. In the network management system including at least one managed device connected, the management device transmits a Set Request message requesting a value change of the management information to the managed device S
From the et Request message sending unit and the managed device,
Get Response which is the response of the above Set Request message
Tr that monitors the events notified from the Get Response message receiving unit that receives the message and the managed device.
Interface between the Trap message receiving unit that receives the ap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator And a network management unit that displays management information acquired from the managed device, and specifies the management information for managing the managed device. The Set Request message receiving part that receives the above Set Request message and the above Set Reque
A designated key analysis unit that determines the authority to notify an event using the designated key included in the st message, and Get R that is a response to the Set Request message received from the management device.
The management device includes a Get Response message transmission unit that transmits an esponse message, and a Trap message transmission unit that notifies the management station of an event when a definition condition occurs as a Trap message. The defined condition for notifying an event of the specified management information and the specified key created by the specified key generation unit are inserted into the SetRequest message and broadcast to the managed device to manage the managed device. Device is the above Set
When a Request message is received and the specified key is included in the message, the specified key analysis unit analyzes the specified key to determine the authority to notify the event,
It is characterized in that the authority is recorded as management information together with the definition condition detected in the Set Request message. As a result, event notifications from the managed devices concentrated in the management device can be thinned out, and the processing load on the management device can be reduced.

The network management system according to claim 2 of the present invention is the network management system according to claim 1, wherein the management device sends a Get Request message requesting acquisition of management information to the managed device. Further equipped with a Get Request message sending unit to send,
The managed device receives the Get Request from the managed device.
It is characterized by further comprising a Get Request message receiving unit for receiving a message. This makes it possible to obtain more detailed management information than the Trap message.

According to a third aspect of the present invention, there is provided a network management system comprising: a management device for broadcasting data, and at least one managed device connected to the management device via a communication network. In the network management system consisting of, the management device monitors the event notified from the managed device, and a set request message transmission unit for transmitting a set request message requesting a change in management information value to the managed device. The Trap message receiving unit that receives the Trap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the administrator Designation of management information for managing the managed device to be acquired as an interface, and management information acquired from the managed device. A network management unit that displays information and a timekeeping unit that monitors the time of broadcast distribution of the Set Request message, and the managed device receives the Set Request message from the management device. Receiver and above Set Reque
A specified key analysis unit that determines the authority to notify an event using the specified key included in the st message, and a Trap message transmission unit that notifies the management station of the event when the definition condition occurs as a Trap message. The management device sets the definition conditions for notifying an event of the management information specified by the network management unit and the specified key created by the specified key generation unit to the Set Reques
When the managed device receives the Set Request message and the designated key is included in the message, the designated key analysis unit inserts it into the t message and periodically broadcasts it to the managed device. The specified key is analyzed to determine the authority to notify the above event, and the authority is set to the Se above.
It is characterized by being recorded as management information together with the definition condition detected from the t Request message.
This makes it easy to manage all of the multiple managed devices,
It is possible to reduce the processing load on the managed device and the management device due to an increase in management information.

The network management system according to claim 4 of the present invention is the network management system according to claim 3, wherein the management device sends a Get Request message requesting acquisition of management information to the managed device. Further equipped with a Get Request message sending unit to send,
The managed device receives the Get Request from the managed device.
It is characterized by further comprising a Get Request message receiving unit for receiving a message. This makes it possible to obtain more detailed management information than the Trap message.

According to a fifth aspect of the present invention, there is provided a network management system comprising: a management device for broadcasting data; and at least one managed device connected to the management device via a communication network. In the network management system, the management device monitors the event notified from the set request message sending unit that sends a set request message requesting a change in management information value to the managed device and the managed device. The Trap message receiving unit that receives the Trap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the administrator Designation of management information for managing the managed device to be acquired as an interface, and management information acquired from the managed device. A network management unit for displaying information and a Trap counter for counting the number of received Trap messages, wherein the managed device receives the Set Request message from the management device.
et Request message receiving unit, specified key analysis unit that determines the authority to notify the event using the specified key included in the Set Request message, and notifies the management station of the event when the definition condition occurs as a Trap message And a trap message sending unit, wherein the management device is a definition condition for notifying an event of the management information designated by the network management unit when the Trap counter exceeds a predetermined value, The specified key created by the specified key generation unit is inserted into the Set Request message and broadcast-delivered to the managed device, and the managed device receives the Set Request message and sends the message. When the specified key is included in the specified key, the specified key analysis unit analyzes the specified key to determine the authority to notify the event, and the authority is set to the Set Reque It is characterized by being recorded as management information together with the definition condition detected from the st message. As a result, it is possible to easily manage all of the plurality of managed devices and reduce the processing load on the managed devices and the management device associated with an increase in management information.

A network management system according to claim 6 of the present invention is the network management system according to claim 5, wherein the management device sends a Get Request message requesting acquisition of management information to the managed device. Further equipped with a Get Request message sending unit to send,
The managed device receives the Get Request from the managed device.
It is characterized by further comprising a Get Request message receiving unit for receiving a message. This makes it possible to obtain more detailed management information than the Trap message.

Further, a network management system according to claim 7 of the present invention comprises a management device for broadcasting data, and at least one managed device connected to the management device via a communication network. In the network management system, the management device transmits a Set Request message transmitting unit that transmits a Set Request message requesting a value change of management information to the managed device, and a response of the Set Request message from the managed device. The Get Response message receiving unit that receives the Get Response message, the Trap message receiving unit that receives the Trap message that monitors the notified event from the managed device, and the authority that the managed device notifies the event. is there
A designated key generation unit that creates a designated key used when determining the right to send a Trap message, designation of management information for managing the managed device that should be acquired as an interface with an administrator, and the managed device And a network management unit that displays the management information acquired from the managed device, wherein the managed device receives a Set Request message receiving unit that receives the Set Request message from the management device, and a designated key included in the Set Request message. Specified key analysis unit that determines the authority to notify an event by using the Get Response message that is a response to the Set Request message received from the management device.
The se message transmission unit, the Trap message transmission unit that notifies the management station of an event when the definition condition occurs as a Trap message, and the designated key analysis unit determines the response delay time using the designated key. Set Re
After obtaining the Set Request message by the quest message receiver, wait for the response delay time to elapse, then
Get Respons above to send a GetResponse message
An e-mail message transmission unit is controlled, and the management device includes a definition condition for notifying an event of the management information specified by the network management unit, and the specified key generation unit. Set Reques to the specified key above
t message and send it to the managed device, the managed device receives the Set Request message,
When the specified key is included in the message, the specified key analysis unit analyzes the specified key to determine the authority to notify the event, and manages the authority together with the definition condition detected from the Set Request message. It is characterized by being recorded as information. As a result, response messages concentrated on the management device can be distributed, and the processing load on the management device can be reduced.

A network management system according to claim 8 of the present invention is the network management system according to claim 7, wherein the management device sends a Get Request message requesting acquisition of management information to the managed device. Further equipped with a Get Request message sending unit to send,
The managed device receives the Get Request from the managed device.
It is characterized by further comprising a Get Request message receiving unit for receiving a message. This makes it possible to obtain more detailed management information than the Trap message.

Further, a network management system according to claim 9 of the present invention comprises a management device for broadcasting data, and at least one managed device connected to the management device via a communication network. In the network management system, the management device transmits a Set Request message transmitting unit that transmits a Set Request message requesting a value change of management information to the managed device, and a response of the Set Request message from the managed device. The Get Response message receiving unit that receives the Get Response message, the Trap message receiving unit that receives the Trap message that monitors the notified event from the managed device, and the authority that the managed device notifies the event. is there
A designated key generation unit that creates a designated key used when determining the right to send a Trap message, designation of management information for managing the managed device that should be acquired as an interface with an administrator, and the managed device And a network management unit that displays the management information acquired from the managed device, wherein the managed device receives a Set Request message receiving unit that receives the Set Request message from the management device, and a designated key included in the Set Request message. Specified key analysis unit that determines the authority to notify an event by using the Get Response message that is a response to the Set Request message received from the management device.
The management apparatus comprises an se message transmission section and a Trap message transmission section for notifying the management station of an event when a defined condition occurs as a Trap message.
The definition condition for notifying the event of the management information designated by the network management unit and the designation key created by the designation key generation unit are inserted into the Set Request message and transmitted to the managed device. Then, the managed device receives the Set Request message, and when the message includes the designated key, the designated key analysis unit analyzes the designated key to determine the authority to notify the event. , The authority is recorded as management information together with the definition condition detected in the Set Request message, the number of definition conditions that occurred while not having the authority to notify the event is recorded in the management information, and the event is notified The management information is transmitted from the Trap message transmission unit when the authority to operate is acquired. Accordingly, it is possible to manage the definition condition that occurs while the managed device does not have the authority to notify the event, and reduce the processing load of the managed device and the management device due to the increase of management information.

A network management system according to a tenth aspect of the present invention is the network management system according to the first aspect, wherein the management apparatus sends a Get Request message requesting acquisition of management information to the managed apparatus. The managed device further includes a Get Request message transmission unit for transmitting, and
It is characterized by further comprising a Get Request message receiving unit for receiving an est message. This makes it possible to obtain more detailed management information than the Trap message.

A network management system according to an eleventh aspect of the present invention includes a management device for broadcasting data, and at least one managed device connected to the management device via a communication network. In the network management system, the management device monitors the event notified from the set request message sending unit that sends a set request message requesting a change in management information value to the managed device and the managed device. The Trap message receiving unit that receives the Trap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the administrator Designation of management information for managing the managed device to be acquired as an interface, and management acquired from the managed device And a network management unit for displaying information, wherein the managed device receives a Set R message that receives the Set Request message from the management device.
The equest message receiving unit, the specified key analysis unit that determines the authority to notify the event using the specified key included in the Set Request message, and the event when the definition condition occurs is notified to the management station as a Trap message. A trap message transmission unit is provided, and the management device provides definition conditions for notifying an event of the management information specified by the network management unit and the specified key created by the specified key generation unit. When it is inserted into the Set Request message and transmitted to the managed device, the managed device receives the Set Request message, and when the message includes a designated key, the designated key analysis unit performs the designated key. Is analyzed to determine the authority to notify the above event, and the authority is used as management information together with the definition condition detected from the above Set Request message. Record,
In the communication network, communication from the management device to the managed device uses a satellite line, communication from the managed device to the management device uses a terrestrial line, and the definition condition is via the satellite line. It is characterized in that the data cannot be received. As a result, it is possible to grasp the down state of the satellite line in real time and reduce the processing load on the managed device and the management device due to an increase in management information.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The embodiment shown here is merely an example, and the present invention is not necessarily limited to this embodiment.

(Embodiment 1) A network management system according to Embodiment 1 corresponding to claims 1 and 2 of the present invention will be described below. FIG. 1 is a diagram showing a network management system according to the first embodiment. In FIG. 1, 100 is a management station (management device) having an SNMP manager function, 101 is a managed device having an SNMP agent function,
A communication network 102 connects the management station 100 and the managed device 101.

The management station 100 is an interface with an administrator who designates and acquires management information, which has a function of notifying the administrator of the management information by an image device or an audio device, and a management information of the management information. Get Request message, Get Next Request to request acquisition
Get Request for sending a message to the managed device 101
A message transmission unit 104, a Set Request message transmission unit 105 that transmits a Set Request message requesting a change in the value of management information to the managed device 101, and the above Get Req
Get Resp that receives the uest message or the Get Response message that is the response to the above Set Request message
Onse message receiving unit 106 and a Tr that receives a Trap message for monitoring the event notified from the managed device 101.
The ap message receiving unit 107 and the designated key generation unit 1 that creates a designated key used when determining the transmission right of a Trap message that is the authority to notify an event in the managed device 101.
08 and. The Get Request message transmission unit 104, the Set Request message transmission unit 105, and Get R
The esponse message receiving unit 106 and the Trap message receiving unit 107 are directly connected to the network management unit 103, respectively. The designated key generation unit 108 passes through the network management unit 103 and the Set Request message transmission unit 105.

The managed device 101 is a management information 109 which is a storage device holding statistical information of the managed device 101.
And Get Reques that receives a Get Request message and a Get Next Request message from the management station 100.
t message receiving unit 110 and management station 100
From the management station 100, or the Set Request message receiving unit 111 that receives the Set Request message from the management station 100.
A Get Response message transmission unit 112 that transmits a Get Response message, which is a response to the equest message, to the management station 100, a Trap message transmission unit 113 that notifies the management station 100 of an event when a definition condition occurs as a Trap message, and Set The specified key analysis unit 114 determines the authority to notify an event using the specified key included in the Request message. The management information 109, the Get Request message receiving unit 110, S
The etRequest message receiving unit 111, the Get Response transmitting unit 112, and the Trap message transmitting unit 113 are directly connected to the management information 109. Designated key analysis unit 114
Via the network management unit 109 and the Set Request message receiving unit 111.

The operation of the network management system configured as above will be described. First, the operation of the management station 100 will be described with reference to FIG. The administrator designates a management information name (definition condition for transmitting a Trap message) to the network management unit 103 via the network management unit 103 (S301), and designates the designation key generation unit 108 based on the management information name. Create key (S
302). Then, the Set Request message transmission unit 10
5. Set Reques including the management information name and specified key
A t message is created and broadcasted to a plurality of managed devices 101 (S303).

From the managed device 101, the above Set Request
Get Response which is the response of the message Get the message
When received by the Response message receiving unit 106, the Ge
The t Response message is analyzed by the network management unit 103 (S304) and notified to the administrator by image or sound (S305). In addition, the managed device 10
When the Trap message is received by the Trap message receiving unit 107 from 1 (S306), the received contents are notified to the administrator by the network management unit 103 (S30).
7).

Next, the operation of the managed device 101 will be described with reference to FIG. Set Request message receiver 1
The Set Request message is received at 11 and the message is analyzed (S401).

When the Set Request message includes the designated key, the process proceeds to S403, and the designated key analysis unit 114
In step S40, the transmission right of the Trap message is determined from the specified key included in the Set Request message and the internal information of the managed device 101 (identifier of managed device, time).
3) The transmission right is set in the management information 109 together with the management information name included in the message (S404). Then, the Get Response message transmitting unit 112 is a response to the received Set Request message, that is, Get Response.
A message is created and transmitted to the management station 100 (S406), and the process proceeds to S407.

On the other hand, if the Set Request message does not include the designated key, the management information name and its value included in the message are set in the management information 109 (S405),
Proceed to S407.

In S407, when the definition condition for the management information name set in the management information 109 occurs, if there is a transmission right of the Trap message, the Trap message transmission unit 11
The Trap message is transmitted from 3 to the management station 100 (S408).

As described above, in the network management system according to the first embodiment, each managed device 101 is managed from the common designated key broadcasted to a plurality of managed devices 101.
Is configured to individually determine the transmission right of the Trap message, the managed device 10 having the transmission right of the Trap message
Since 1 is only a part, even if the definition conditions of the Trap message occur simultaneously in a plurality of managed devices 101, a high-performance dedicated device as in the past is used or a plurality of SNMP managers are installed. The processing load on the management station 100 can be suppressed without distributing the processing load.

It should be noted that the Set Request message for directly specifying the management information name and its value and requesting the value change of the management information 109 is issued from the network management unit 103 without using a specification key as in the case of normal SNMP. You may make it transmit from the message transmission part 105.

Although not shown in FIGS. 3 and 4, Ge
t Request message transmission unit 104 requests acquisition of management information, and Get Request message reception unit 110 requests Get R
When you get the equest message, the response is Get Re
Send response message to Get Response message 11
If it is transmitted from 2, it is possible to acquire detailed management information as compared with the Trap message.

The designated key created by the designated key generation unit 108 is not only randomly created, but also calculated from the total number of managed devices and the number of managed devices that have the transmission right of the Trap message. It is also possible, and these numbers shall be given from the network management unit.

(Embodiment 2) A network management system according to Embodiment 2 corresponding to claims 7 and 8 of the present invention will be described below. FIG. 5 is a diagram showing a network management system according to the second embodiment. In FIG. 5, reference numeral 500 is a management station (management device) having an SNMP manager function, 501 is a managed device having an SNMP agent function,
A communication network 502 connects the management station 500 and the managed device 501.

The management station 500 is an interface with a manager who designates and acquires management information, which has a function of notifying the manager of the management information by an image device or an audio device, and a management information of the management information. The managed device 50 sends a Set Request message requesting a value change.
1 and a Set Request message transmission unit 504,
Get Response which is the response of the above Set Request message
Get Response message receiving unit 5 that receives a message
05, and a Trap message receiving unit 50 that receives a Trap message for monitoring the event notified from the managed device 501.
6 and the authority to notify an event in the managed device 501.
And a designated key generation unit 507 that creates a designated key used when determining the transmission right of the Trap message.

The managed device 501 is a management information 508 which is a storage device holding statistical information of the managed device 501.
And a Set Request message receiving unit 509 that receives a Set Request message from the management station 500,
Get Response which is the response of the above Set Request message
Send message to management station 500 Get Re
The sponse message transmission unit 510 and the management station 5 as an event when a defined condition occurs as a Trap message.
Trap message sending unit 511 that notifies 00 and Set Re
A specified key analysis unit 512 that determines the authority to notify an event using the specified key included in the quest message, and a timer unit 513 that monitors the passage of time and measures the response delay time inserted until the Get Response message is transmitted. Have.

The operation of the network management system configured as above will be described. Management station 5
At 00, a Set Request message including the management information name specified by the network management unit 503 and the specified key created by the specified key generation unit 507 is created, and the Set Request message is created.
Broadcast from the message transmission unit 504 to a plurality of managed devices 501.

The managed device 501 receives and analyzes the Set Request message from the management station 500. When the Set Request message includes the designated key, the designated key analysis unit 512 determines the transmission right of the Trap message from the designated key included in the Set Request message and the internal information of the managed device 501, and transmits the Trap message. Management information 5 along with the management information name included in the message
Set to 08. At this time, with the same procedure, the time to send the Get Response message using the specified key,
That is, from receiving the Set Request message from Get Respons
Determine the response delay time before sending e-message,
After waiting for the response delay time using the time counting unit 513, the Get Response message is transmitted from the Get Response message transmitting unit 510 to the management station 500.
On the other hand, if the Set Request message does not include the designated key, the management information name and its value included in the message are set in the management information 508.

In the managed device 501, when the definition condition for the management information name set in the management information 508 occurs, the Trap message is transmitted to the management station 500 if the Trap message has the transmission right.

At the management station 500, Get Respon
Upon receiving the se message, the network management unit 503
Notifies the administrator of the content of the Get Response message. When the Trap message is received, the network management unit 503 notifies the administrator of the content of the Trap message.

As described above, in the network management system according to the second embodiment, when the definition condition of the Trap message is set by using the Set Request message, Get Re
The response delay time until the sponse message is transmitted is calculated from the specified key, and the transmission of the Get Response message is delayed. The processing load can be reduced.

Note that the response delay time from the designated key to the transmission of the Get Response message is not determined, but the Trap
It also includes the case where the sending of Get Response message is prohibited when the message is not sent.

Further, the management device further comprises a Get Request message transmission unit for transmitting a Get Request message requesting acquisition of management information to the managed device, and the managed device receives the Get Request message from the management device. If a Get Request message receiving unit for receiving is further provided, it is possible to obtain more detailed management information than the Trap message.

(Third Embodiment) A network management system according to a third embodiment corresponding to claims 3 and 4 of the present invention will be described below. FIG. 6 is a diagram showing a network management system according to the third embodiment. 6, reference numeral 600 is a management station (management device) having an SNMP manager function, 601 is a managed device having an SNMP agent function,
A communication network 602 connects the management station 600 and the managed device 601.

The management station 600 is an interface with an administrator who designates and obtains management information, and has a function of notifying the administrator of the management information by an image device or an audio device, and a management information of the management information. The managed device 60 sends a Set Request message requesting a value change.
1, a Set Request message transmission unit 604 for transmitting to
A Trap message receiving unit 605 that receives a Trap message that monitors the event notified from the managed device 601, and the authority to notify the event in the managed device 601, that is, Trap
A designated key generation unit 606 that creates a designated key used when determining the message transmission right, and monitors the passage of time,
Set including the specified key created by the specified key generation unit 606
The network management unit 603 transmits a Request message, and a clock unit 607 that measures a periodic interval.

The managed device 601 is a management information 608 which is a storage device holding the statistical information of the managed device 601.
And a Set Request message receiving unit 609 that receives a Set Request message from the management station 600,
A Trap message transmission unit 610 that notifies the management station 600 of an event when the definition condition occurs as a Trap message, and a designated key analysis unit 611 that determines the authority to notify the event using the designated key included in the Set Request message. With.

The operation of the network management system configured as above will be described. Management station 6
At 00, a Set Request message including the management information name specified by the network management unit 603 and the specified key created by the specified key generation unit 606 is created, and the Set Request message is created.
Broadcast from the message transmission unit 604 to a plurality of managed devices 601. The time information at this time is recorded by the clock unit 607.

In the managed device 601, the Set Request message receiving unit 609 receives the Set Request message from the management station 600 and analyzes it. Set Re
When the quest message includes the designated key, the designated key analysis unit 611 determines the transmission right of the Trap message from the designated key included in the SetRequest message and the internal information of the managed device 601, and sets the transmission right to the same message. It is set in the management information 608 together with the management information name included in. On the other hand, if the Set Request message does not include the designated key, the management information name and its value included in the message are set in the management information 608.

Then, when the definition condition for the management information name set in the management information 608 occurs, if there is the right to send the Trap message, the Trap message sending unit 610 sends
The Trap message is transmitted to the management station 600.

When the Trap message receiving unit 605 of the management station 600 receives the Trap message, the network management unit 603 notifies the administrator of the received content of the Trap message. Then, the network management unit 603 which has confirmed the elapse of a predetermined time by the timer unit 607.
Sends a Set Request message including the management information name and the specified key newly created by the specified key generation unit 606 to Set Reque
A plurality of managed devices 601 from the st message transmission unit 604
Broadcasting is carried out to, and the time information at this time is recorded by the clock unit 607.

As described above, in the network management system according to the third embodiment, the managed device 601 which broadcasts the designated key periodically and has the Trap message transmission right.
Since it was changed dynamically, the management station 6
00 manages only a part of the plurality of managed devices 601 connected via the communication network 602 at a certain point of time, but manages all of the plurality of managed devices 601 after a certain time elapses. As a result, the processing load on the managed device 601 and the management station 600 associated with an increase in management information can be reduced.

The management device further includes a Get Request message transmission unit for transmitting a Get Request message requesting acquisition of management information to the managed device, and the managed device receives the Get Request message from the management device. If a Get Request message receiving unit for receiving is further provided, it is possible to obtain more detailed management information than the Trap message.

(Embodiment 4) A network management system according to Embodiment 4 corresponding to Claims 5 and 6 of the present invention will be described below. FIG. 7 is a diagram showing a network management system according to the fourth embodiment. In FIG. 7, reference numeral 700 is a management station (management device) having an SNMP manager function, 701 is a managed device having an SNMP agent function,
A communication network 702 connects the management station 700 and the managed device 701.

The management station 700 is an interface with a manager who designates and acquires management information, and has a network management unit 703 having a function of notifying the manager of the management information by an image device or an audio device, and the management information of the management information. The managed device 70 sends a Set Request message requesting a value change.
1 and a Set Request message transmission unit 704,
The Trap message receiving unit 705 that receives a Trap message that monitors the event notified from the managed device 701, and the authority to notify the event in the managed device 701, that is, Trap
It has a designated key generation unit 706 that creates a designated key used when determining the message transmission right, and a Trap counter 707 that counts the number of Trap messages received. Note that when the number of Trap messages received by the Trap counter 707 exceeds a predetermined value, the managed device 701 having the authority to create a specified key and broadcast the Set Request message to notify the event. To switch dynamically.

The managed device 701 is a management information 708 which is a storage device holding statistical information of the managed device 701.
And a Set Request message receiving unit 709 that receives a Set Request message requesting a value change of the management information from the management station 700, and a Trap message transmitting unit that notifies the management station 700 of an event when a definition condition occurs as a Trap message. 710 and a designated key analysis unit 711 that determines the authority to notify an event using the designated key included in the Set Request message.

The operation of the network management system configured as above will be described. Management station 7
At 00, a Set Request message including the management information name specified by the network management unit 703 and the specified key created by the specified key generation unit 706 is created, and the Set Request message is created.
Broadcast from the message transmission unit 704 to a plurality of managed devices 701.

The managed device 701 receives and analyzes the Set Request message from the management station 700. When the Set Request message includes the designated key, the designated key analysis unit 711 determines the transmission right of the Trap message from the designated key included in the Set Request message and the internal information of the managed device 701, and the transmission right is determined. And management information 708 included in the message together with the management information name.
Set to. On the other hand, if the Set Request message does not include the designated key, the management information name and its value included in the message are set in the management information 708.

Then, if a definition condition for the management information name set in the management information 708 occurs and there is a Trap message transmission right, the Trap message transmission unit 710 transmits the Trap message to the management station 700.

In the management station 700, when the Trap message receiving section 705 receives the Trap message, the Trap message is received.
The counter 707 is updated, and the reception contents are notified to the administrator by the network management unit 703. When the Trap counter 707 detects that the number of received Trap messages exceeds the predetermined number, the network management unit 703
The Set Request message including the management information name and the designated key newly created by the designated key generation unit 706 is broadcast from the Set Request message transmission unit 704 to the plurality of managed devices 701.

As described above, in the network management system according to the fourth embodiment, the designated key is broadcast by using the number of received Trap messages as a trigger, and the managed device having the right to send the Trap message is dynamically changed. Therefore, the management station 700 recognizes whether the definition condition of the Trap message received from the managed device 701 is the same in the other managed devices, and the management station 700 manages the plurality of managed devices 701. You can easily manage everything,
As a result, the processing load on the managed device 701 and the management station 700 due to the increase in management information can be reduced. There may be a case where a plurality of Trap counters 707 are provided for each definition condition of the Trap message.

Further, the management apparatus further comprises a Get Request message transmitting section for transmitting a Get Request message requesting acquisition of management information to the managed apparatus, and the managed apparatus receives the Get Request message from the management apparatus. If a Get Request message receiving unit for receiving is further provided, it is possible to obtain more detailed management information than the Trap message.

(Embodiment 5) A network management system according to Embodiment 5 corresponding to claims 9 and 10 of the present invention will be described below. FIG. 8 is a diagram showing a network management system according to the fifth embodiment. In FIG. 8, reference numeral 800 is a management station (management device) having an SNMP manager function, 801 is a managed device having an SNMP agent function,
A communication network 802 connects the management station 800 and the managed device 801.

The management station 800 is an interface with an administrator who designates and acquires management information, and has a function of notifying the administrator of the management information by an image device or an audio device, and a management information of the management information. The managed device 80 sends a Set Request message requesting a value change.
1 and a Set Request message transmission unit 804,
Get Response which is the response of the above Set Request message
Get Response message receiving unit 8 for receiving a message
05, and a Trap message receiving unit 80 that receives a Trap message for monitoring the event notified from the managed device 801.
6 and a designated key generation unit 807 that creates a designated key used when determining the event of the managed device 801, that is, the transmission right of the Trap message.

The managed device 801 is a management information 808 which is a storage device holding the statistical information of the managed device 801.
And a Set Request message receiving unit 809 that receives a Set Request message from the management station 800,
Get Response which is the response of the above Set Request message
Send message to management station 800 Get Re
The sponse message transmission unit 810 and the management station 8 as a Trap message indicating the event when the defined condition occurs.
Trap message sending unit 811 that notifies 00 and Set Re
The specified key analysis unit 812 determines the authority to notify the event using the specified key included in the quest message.

The operation of the network management system configured as above will be described. Management station 8
In 00, a Set Request message including the management information name specified by the network management unit 803 and the specified key created by the specified key generation unit 807 is created, and the Set Request message transmission unit 804 sends the managed devices 801 a plurality of managed devices 801. Broadcast.

The managed device 801 receives and analyzes the Set Request message from the management station 800. When the Set Request message includes the designated key, the designated key analysis unit 812 determines the transmission right of the Trap message from the designated key included in the Set Request message and the internal information of the managed device 801, and determines the transmission right. Management information 80 together with the management information name included in the message
Set to 8. On the other hand, if the Set Request message does not include the designated key, the management information name and its value included in the message are set in the management information 808.

When the definition condition set in the management information 808 occurs, if there is no transmission right of the Trap message, the number of occurrences of the definition condition is set in the management information 8 for each definition condition.
It is recorded in 08. Then, the managed device 801 is
If the transmission right of the Trap message is acquired, the management information 808
The management information relating to the Trap message stored in the above is transmitted to the management station 800.

As described above, in the network management system according to the fifth embodiment, the managed device 801 that does not have the right to send the Trap message manages the number of times the Trap message is generated for each definition condition, and Since the management information related to the Trap message is transmitted when the transmission right is acquired, the management station 800 also manages the definition condition that occurs while the managed device 801 does not have the authority to notify the event. , All the plurality of managed devices 801 can be easily managed, and as a result, the managed device 801 and the management station 80 accompanying the increase of management information
The processing load of 0 can be reduced.

The management apparatus further comprises a Get Request message transmitting unit for transmitting a Get Request message requesting acquisition of management information to the managed apparatus, and the managed apparatus receives the Get Request message from the management apparatus. If a Get Request message receiving unit for receiving is further provided, it is possible to obtain more detailed management information than the Trap message.

(Sixth Embodiment) A network management system according to a sixth embodiment of the present invention will be described below. FIG. 9 is a diagram showing a network management system according to the sixth embodiment. In FIG. 9, reference numeral 900 is a management station (management apparatus) having an SNMP manager function, and 901 is a managed apparatus having an SNMP agent function. Also, 902
The satellite link is from the management station 900 to the managed device 9
01, and the ground line 903 is a communication route from the managed device 901 to the management station 900.

The management station 900 sends a Set Request message requesting a value change of the management information to the managed device 9
Set Request message sending unit 904 to send to 01
And an authority to notify an event in the managed device 901, that is, a designated key generation unit 905 that creates a designated key used when determining a transmission right of a Trap message, and an administrator who designates and acquires management information. Is the interface of
A network management unit 906 having a function of notifying management information to an administrator by an image device or an audio device, and a managed device 9
And a Trap message receiving unit 907 that receives a Trap message that monitors the event notified from 01.

The managed device 901 is a management station 9
00 to receive a Set Request message requesting a change in the value of the management information.
And a designated key analysis unit 909 that determines the authority to notify an event using the designated key included in the Set Request message.
Management information 910, which is a storage device that holds the statistical information of the managed device 901, and a Trap message transmission unit 911 that notifies the management station 900 of an event when a definition condition occurs as a Trap message. .

The operation of the network management system configured as above will be described. Management station 9
At 00, a Set Request message including a data unreceivable state via the satellite line 902 designated as the management information name by the network management unit 906 and the designated key created by the designated key generation unit 905 is created. Broadcast transmission is performed from the transmission unit 904 via the satellite line 902.

The managed device 901 receives and analyzes the Set Request message from the management station 900. When the Set Request message includes the designated key, the designated key analysis unit 909 determines the transmission right of the Trap message from the designated key included in the Set Request message and the internal information of the managed device 901. The management information 910 is set in the management information 910 together with the management information name that is included and the state that data cannot be received via the satellite line. Then, when the data cannot be received via the satellite line and the Trap message transmission right is given, the Trap message transmission unit 911 transmits the Trap message to the management station 900. In the management station 900, when the Trap message reception unit 907 receives the Trap message, the network management unit 906 notifies the reception content to the administrator.

As described above, in the network management system according to the sixth embodiment, when the communication path from the management station 900 to the managed device 901 is only the satellite line 902, the Trap message via the ground line 903 is used. It is possible to detect a state in which data cannot be received via the satellite line without performing network management using the SNMP Get Request message as in the related art.

Further, since only the managed device 901 having the right to transmit the Trap message is made to transmit the Trap message, the Trap for the data unreceivable state via the satellite line which may possibly occur at the same time due to the influence of weather or the like. The messages can be thinned out, and the processing load on the management station can be further reduced.

As described above, according to the network management system according to claim 1 of the present invention, in order to solve the above-mentioned problems, the network management system according to claim 1 of the present invention uses the same data In a network management system including a management device that performs information distribution and at least one managed device that is connected to the management device via a communication network, the management device requests a change in the value of management information. A Set Request message sending unit that sends a Request message to the managed device, and a Get request that is a response to the Set Request message from the managed device.
Get Response message receiving unit that receives a Response message, a Trap message receiving unit that receives a Trap message that monitors the notified event from the managed device, and a Trap message that is the authority of the managed device to notify the event A specified key generation unit that creates a specified key to be used when determining the transmission right of the device, specification of management information for managing the managed device that should be acquired as an interface with the administrator, and acquisition from the managed device The managed device, the managed device is configured to display the set request message from the managed device, and the managed device is configured to display the set request message.
A designated key analysis unit that determines the authority to notify an event using the designated key included in the equest message, and a response G of the Set Request message received from the management device.
The management device includes a Get Response message transmission unit that transmits an et Response message, and a Trap message transmission unit that notifies the management station of an event when a definition condition occurs as a Trap message. The definition condition for notifying the event of the management information specified by the above and the specified key created by the specified key generation unit are inserted into the SetRequest message and broadcast to the managed device, Management device is above
When the Set Request message is received and the specified key is included in the message, the specified key analysis unit analyzes the specified key to determine the authority to notify the event, and the authority is set in the Set Request message. Since it is recorded as the management information together with the definition condition detected from the above, it is possible to reduce the processing load on the management device by thinning out the event notifications from the managed devices concentrated in the management device.

According to a second aspect of the network management system of the present invention, in the network management system of the first aspect, the management device sends a Get Request message requesting acquisition of management information to the target device. The managed device further comprises a Get Request message transmission unit for transmitting to the management device, and
Since the Get Request message receiving unit that receives the quest message is further provided, it is possible to obtain more detailed management information than the Trap message.

Further, according to the network management system of the third aspect of the present invention, a management device for broadcasting data and at least one or more managed devices connected to the management device via a communication network. In the network management system including the management device, the management device is notified from the managed device and a Set Request message transmission unit that transmits a Set Request message requesting a change in management information value to the managed device. Tr that monitors events
Interface between the Trap message receiving unit that receives the ap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator Network management unit that specifies management information for managing the managed device to be acquired as described above, and displays the management information acquired from the managed device, and timekeeping that monitors the broadcast delivery time of the SetRequest message. The managed device includes a Set Request message receiving unit that receives the Set Request message from the management device, and the S
A specified key analysis unit that determines the authority to notify an event using the specified key included in the et Request message, and a Trap message transmission unit that notifies the management station of the event when the definition condition occurs as a Trap message. The management device includes a definition condition for notifying an event of the management information specified by the network management unit, and the specification key created by the specification key generation unit.
t Request message and periodically broadcast to the managed device.
When a message is received and the specified key is included in the message, the specified key analysis unit analyzes the specified key to determine the authority to notify the event, and the authority is detected from the Set Request message. Since it is recorded as the management information together with the defined conditions, all of the plurality of managed devices can be easily managed and the processing load on the managed device and the management device due to the increase of the management information can be reduced.

According to the network management system of claim 4 of the present invention, in the network management system of claim 3, the management device sends a Get Request message requesting acquisition of management information to the target device. The managed device further comprises a Get Request message transmission unit for transmitting to the management device, and
Since the Get Request message receiving unit that receives the quest message is further provided, it is possible to obtain more detailed management information than the Trap message.

Further, according to the network management system of the fifth aspect of the present invention, a management device for broadcasting data and at least one or more connected devices connected to the management device via a communication network. In the network management system including the management device, the management device is notified from the managed device and a Set Request message transmission unit that transmits a Set Request message requesting a change in management information value to the managed device. Tr that monitors events
Interface between the Trap message receiving unit that receives the ap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator A network management unit that specifies management information for managing the managed device to be acquired as, and displays the management information acquired from the managed device, and a Trap counter that counts the number of received Trap messages, The managed device includes a Set Request message receiving unit that receives the Set Request message from the management device, and the Set R
A specified key analysis unit that determines the authority to notify an event using the specified key included in the equest message, and a Trap message transmission unit that notifies the management station of the event when the definition condition occurs as a Trap message. ,
The management device is created by the specified key generation unit and definition conditions for notifying an event of the management information specified by the network management unit when the Trap counter exceeds a predetermined value. Set Reques to the specified key above
When the managed device receives the Set Request message and the designated key is included in the message, the designated key analysis unit designates the designated key. The authority to notify the above event is determined by analyzing the key, and the authority is notified to the Set Requ
Since it is recorded as management information together with the definition condition detected from the est message, it is possible to easily manage all of the multiple managed devices and reduce the processing load on the managed device and the management device due to an increase in management information. be able to.

Further, according to the network management system of claim 6 of the present invention, in the network management system of claim 5, the management device sends a Get Request message requesting acquisition of management information to the target device. The managed device further comprises a Get Request message transmission unit for transmitting to the management device, and
Since the Get Request message receiving unit that receives the quest message is further provided, it is possible to obtain more detailed management information than the Trap message.

According to a seventh aspect of the network management system of the present invention, a management device for broadcasting data and at least one or more connected devices connected to the management device via a communication network. In a network management system including a management device, the management device transmits a Set Request message transmitting unit that transmits a Set Request message requesting a change in management information value to the managed device, and the Set Request message from the managed device. Get Res, which is the response of the message, Get Response message
The sponse message receiving unit, the Trap message receiving unit that receives a Trap message for monitoring the notified event from the managed device, and the transmission right of the Trap message that is the authority for the managed device to notify the event A designated key generation unit for creating a designated key used at the time, designation of management information for managing the managed device to be acquired as an interface with an administrator, and display of management information acquired from the managed device. And a network management unit for performing the Set Req from the management apparatus.
A Set Request message receiving unit that receives an est message, a designated key analysis unit that determines the authority to notify an event using the designated key included in the Set Request message, and a response to the Set Request message received from the management device. Ge that sends a Get Response message that is
When the t Response message transmission unit, the Trap message transmission unit that notifies the management station of an event when the definition condition occurs as a Trap message, and the designated key analysis unit determines the response delay time using the designated key, The above Set Request by the above Set Request message receiver
After getting the message, wait for the response delay time to elapse, then send the Get Response message as described above.
The response time is controlled by the t Response message transmission unit, and the management device is created by the specified key generation unit and definition conditions for notifying an event of the management information specified by the network management unit. The specified key and the Se
t Request message and transmits to the managed device, the managed device receives the Set Request message, and when the specified key is included in the message, the specified key analysis unit specifies the specified key. Analyze and determine the authority to notify the above event, and set the authority to Set Requ
Since it is recorded as the management information together with the definition condition detected from the est message, the response messages concentrated in the management device can be dispersed and the processing load of the management device can be reduced.

According to the network management system of the eighth aspect of the present invention, in the network management system of the seventh aspect, the management device sends a Get Request message requesting acquisition of management information to the target device. The managed device further comprises a Get Request message transmission unit for transmitting to the management device, and
Since the Get Request message receiving unit that receives the quest message is further provided, it is possible to obtain more detailed management information than the Trap message.

Further, according to the network management system of the ninth aspect of the present invention, a management device for broadcasting data and at least one or more connected devices connected to the management device via a communication network. In a network management system including a management device, the management device transmits a Set Request message transmitting unit that transmits a Set Request message requesting a value change of management information to the managed device, and the Set Request message from the managed device. Get Res, which is the response of the message, Get Response message
The sponse message receiving unit, the Trap message receiving unit that receives a Trap message for monitoring the notified event from the managed device, and the transmission right of the Trap message that is the authority for the managed device to notify the event A designated key generation unit for creating a designated key used at the time, designation of management information for managing the managed device to be acquired as an interface with an administrator, and display of management information acquired from the managed device. And a network management unit for performing the Set Req from the management apparatus.
A Set Request message receiving unit that receives an est message, a designated key analysis unit that determines the authority to notify an event using the designated key included in the Set Request message, and a response to the Set Request message received from the management device. Ge that sends a Get Response message that is
The management device includes a t Response message transmission unit and a Trap message transmission unit that notifies the management station of an event when a defined condition occurs as a Trap message. The definition condition for notifying an event of information and the specified key created by the specified key generation unit are inserted into the Set Request message and transmitted to the managed device, and the managed device receives the Set Request. When a message is received and the specified key is included in the message, the specified key analysis unit analyzes the specified key to determine the authority to notify the event, and the authority is detected from the Set Request message. It is recorded as management information together with the defined conditions, and the number of definition conditions that occurred while not having the authority to notify the above event is recorded in the management information. Since the above management information is sent from the Trap message transmission unit when the authority to notify the elephant is acquired, it also manages the definition conditions that occur while the managed device does not have the authority to notify the event. It is possible to reduce the processing load on the managed device and the management device due to an increase in management information.

According to the network management system of the tenth aspect of the present invention, in the network management system of the ninth aspect, the management device sends a Get Request message requesting acquisition of management information to the target device. The managed device further comprises a Get Request message transmission unit for transmitting to the management device.
Since the Get Request message receiving unit for receiving the equest message is further provided, it is possible to obtain more detailed management information than the Trap message.

According to the eleventh aspect of the network management system of the present invention, a management device for broadcasting data and at least one or more connected devices connected to the management device via a communication network. In the network management system including the management device, the management device is notified from the managed device and a Set Request message transmission unit that transmits a Set Request message requesting a change in management information value to the managed device. Tr that monitors events
Interface between the Trap message receiving unit that receives the ap message, the designated key generation unit that creates the designated key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator And a network management unit that displays management information acquired from the managed device, and specifies the management information for managing the managed device. The Set Request message receiving part that receives the above Set Request message and the above Set Reque
A specified key analysis unit that determines the authority to notify an event using the specified key included in the st message, and a Trap message transmission unit that notifies the management station of the event when the definition condition occurs as a Trap message. The management device sets the definition conditions for notifying an event of the management information specified by the network management unit and the specified key created by the specified key generation unit to the Set Reques
t message and send it to the managed device, the managed device receives the Set Request message,
When the specified key is included in the message, the specified key analysis unit analyzes the specified key to determine the authority to notify the event, and manages the authority together with the definition condition detected from the Set Request message. The information is recorded as information, the communication network uses a satellite line for communication from the management device to the managed device, and uses a terrestrial line for communication from the managed device to the management device. By setting the state in which the data cannot be received via the satellite line, the down state of the satellite line can be grasped in real time, and the processing load on the managed device and the management device accompanying an increase in management information can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a network management system according to a first embodiment.

FIG. 2 is a schematic diagram of network management by SNMP.

FIG. 3 is a flow diagram showing transmission / reception of an SNMP message in a management station.

FIG. 4 is a flowchart of a managed device transmitting a Trap message.

FIG. 5 is a block diagram of a network management system according to a second embodiment.

FIG. 6 is a block diagram of a network management system according to a third embodiment.

FIG. 7 is a block diagram of a network management system according to a fourth embodiment.

FIG. 8 is a block diagram of a network management system according to a fifth embodiment.

FIG. 9 is a block diagram of a network management system according to a sixth embodiment.

[Explanation of symbols]

100 management stations 101 managed device 102 communication network 103 network management unit 104 Get Request message sending part 105 Set Request message sending part 106 Get Response Message Receiver 107 Trap message receiver 108 designated key generation unit 109 management information 110 Get Request Message Receiver 111 Set Request message receiver 112 Get Response Message sending part 113 Trap message transmitter 114 designated key analysis unit 200 management stations 201 Managed device 202 SNMP manager 203 SNMP agent 204 MIB 500 management station 501 Managed device 502 communication network 503 Network Management Department 504 Set Request message transmitter 505 Get Response Message receiver 506 Trap message receiver 507 Designated key generation unit 508 management information 509 Set Request message receiver 510 Get Response Message sending part 511 Trap message sending part 512 Specified key analysis unit 513 clock section 600 management station 601 Managed device 602 communication network 603 Network management unit 604 Set Request message sending part 605 Trap message receiver 606 Designated key generation unit 607 Clock part 608 Management information 609 Set Request message receiver 610 Trap message transmitter 611 Designated key analysis unit 700 management station 701 Managed device 702 communication network 703 Network management unit 704 Set Request message transmitter 705 Trap message receiver 706 Designated key generation unit 707 Trap counter 708 management information 709 Set Request message receiver 710 Trap message transmitter 711 Designated key analysis unit 800 management station 801 Managed device 802 communication network 803 Network Management Department 804 Set Request message sending part 805 Get Response Message receiver 806 Trap message receiver 807 Designated key generation unit 808 management information 809 Set Request message receiver 810 Get Response Message sending part 811 Trap message transmitter 812 Designated key analysis unit 900 management station 901 Managed device 902 satellite line 903 Ground line 904 Set Request message transmitter 905 Designated key generation unit 906 Network Management Department 907 Trap message receiver 908 Set Request message receiver 909 Designated key analysis unit 910 Management information 911 Trap message transmitter

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuhiro Iwai             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 5K030 GA14 HA08 HB06 JA10 KA07                       LD02                 5K033 AA03 BA08 CB13 CB14 DB12                       DB14 DB20 EA07

Claims (11)

[Claims] 1. A network management system comprising a management device for broadcasting data and at least one managed device connected to the management device via a communication network, wherein the management device is a management device. A Set Request message sending unit that sends a Set Request message requesting a change in the information value to the managed device, and a Get Response message that is a response to the Set Request message from the managed device Get
Trap that receives the Trap message that monitors the notified event from the Response message receiving unit and the managed device.
The message receiving unit, the specified key generation unit that creates a specified key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the managed device that should be acquired as an interface with the administrator. A network management unit for designating management information for managing the management device and displaying the management information acquired from the managed device, wherein the managed device receives the Set Request message from the management device. Set Request message receiving unit, a designated key analysis unit that determines the authority to notify an event using the designated key included in the Set Request message, and a Get Respo that is a response to the Set Request message received from the management device.
The management device includes a Get Response message transmission unit that transmits an nse message, and a Trap message transmission unit that notifies the management station of an event when a defined condition occurs as a Trap message. The definition condition for notifying the event of the specified management information and the specified key created by the specified key generation unit are set in the Set Re
When the managed device receives the Set Request message and inserts it into the quest message and broadcasts it to the managed device, and the designated key is included in the message, the designated key analysis unit performs the designated key. The authority to notify the above event is determined by analyzing the
A network management system characterized by recording it as management information together with the definition conditions detected in the message. 2. The network management system according to claim 1, wherein the management device requests acquisition of management information.
The management device further includes a Get Request message transmission unit that transmits a t message to the managed device, wherein the managed device receives the Get Request from the management device.
A network management system, further comprising a Get Request message receiving unit for receiving a message. 3. A network management system comprising a management device for broadcasting data and at least one managed device connected to the management device via a communication network. Monitor the event notified from the Set Request message sending unit that sends a Set Request message requesting a change in the value of information to the managed device and the managed device.
Interface between the Trap message receiving unit that receives the Trap message, the specified key generation unit that creates the specified key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator Network management unit that specifies management information for managing the managed device to be acquired, and displays the management information acquired from the managed device, and monitors the broadcast time of the Set Request message. The managed device comprises a Set Request message receiving unit that receives the Set Request message from the management device, and the authority to notify the event using the designated key included in the Set Request message. Specified key parser and Trap message that notifies the above management station of the event when the definition condition occurs as a Trap message The management device includes a definition condition for notifying an event of the management information specified by the network management unit, and the specified key created by the specified key generation unit. Re
When the managed device receives the Set Request message and includes a designated key in the message, the managed device receives the designated key by the designated key analysis unit. The authority to notify the above event is determined by analyzing the specified key, and the authority is assigned to the Set Request.
A network management system characterized by recording it as management information together with the definition conditions detected in the message. 4. The network management system according to claim 3, wherein the management device requests acquisition of management information.
The management device further includes a Get Request message transmission unit that transmits a t message to the managed device, wherein the managed device receives the Get Request from the management device.
A network management system, further comprising a Get Request message receiving unit for receiving a message. 5. A network management system comprising a management device for broadcasting data, and at least one managed device connected to the management device via a communication network. Monitors events notified from the Set Request message sending unit that sends a Set Request message requesting a value change of information to the managed device and the managed device.
Interface between the Trap message receiving unit that receives the Trap message, the specified key generation unit that creates the specified key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator A network management unit that specifies management information for managing the managed device to be acquired as, and displays the management information acquired from the managed device, and a Trap counter that counts the number of received Trap messages, The managed device comprises a Set Request message receiving unit that receives the Set Request message from the management device, and a designated key analysis that determines the authority to notify an event using the designated key included in the Set Request message. Section and Trap message transmission that notifies the above management station of the event when the defined condition occurs as a Trap message And a definition condition for notifying an event of the management information designated by the network management unit when the Trap counter exceeds a predetermined value, and the designated key generation unit. The specified key created in
When the managed device receives the Set Request message and the specified key is included in the message, the specified key analysis unit specifies the specified value. The authority to notify the above event is determined by analyzing the key, and the authority is set to the above Set Request.
A network management system characterized by recording it as management information together with the definition conditions detected in the message. 6. The network management system according to claim 5, wherein the management device requests acquisition of management information.
The management device further includes a Get Request message transmission unit that transmits a t message to the managed device, wherein the managed device receives the Get Request from the management device.
A network management system, further comprising a Get Request message receiving unit for receiving a message. 7. A network management system comprising a management device for broadcasting data and at least one managed device connected to the management device via a communication network. A Set Request message sending unit that sends a Set Request message requesting a change in the value of information to the managed device, and a Get Response message that is a response to the Set Request message from the managed device Get
Trap that receives the Trap message that monitors the notified event from the Response message receiving unit and the managed device.
The message receiving unit, the specified key generation unit that creates a specified key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the managed device that should be acquired as an interface with the administrator. A network management unit for designating management information for managing the management device and displaying the management information acquired from the managed device, wherein the managed device receives the Set Request message from the management device. Set Request message receiving unit, a designated key analysis unit that determines the authority to notify an event using the designated key included in the Set Request message, and a Get Respo that is a response to the Set Request message received from the management device.
Get Response message sending unit that sends nse message, Trap message sending unit that notifies the management station of the event when the definition condition occurs as a Trap message, and the specified key analysis unit uses the specified key for the response delay time. And a time counting unit that controls the Get Response message transmitting unit to transmit the Get Response message after waiting for the response delay time to elapse after the Set Request message receiving unit acquires the Set Request message. The management device includes a definition condition for notifying an event of the management information specified by the network management unit and the specified key created by the specified key generation unit.
When it is inserted into a quest message and transmitted to the managed device, the managed device receives the Set Request message, and when the specified key is included in the message, the specified key analysis unit analyzes the specified key. Then, the authority to notify the above event is determined, and the authority is notified to the above Set Request.
A network management system characterized by recording it as management information together with the definition conditions detected in the message. 8. The network management system according to claim 7, wherein the management device requests acquisition of management information.
The management device further includes a Get Request message transmission unit that transmits a t message to the managed device, wherein the managed device receives the Get Request from the management device.
A network management system, further comprising a Get Request message receiving unit for receiving a message. 9. A network management system comprising a management device for broadcasting data and at least one managed device connected to the management device via a communication network. A Set Request message sending unit that sends a Set Request message requesting a change in the value of information to the managed device, and a Get Response message that is a response to the Set Request message from the managed device Get
Trap that receives the Trap message that monitors the notified event from the Response message receiving unit and the managed device.
The message receiving unit, the specified key generation unit that creates a specified key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the managed device that should be acquired as an interface with the administrator. A network management unit for designating management information for managing the management device and displaying the management information acquired from the managed device, wherein the managed device receives the Set Request message from the management device. Set Request message receiving unit, a designated key analysis unit that determines the authority to notify an event using the designated key included in the Set Request message, and a Get Respo that is a response to the Set Request message received from the management device.
The management device includes a Get Response message transmission unit that transmits an nse message, and a Trap message transmission unit that notifies the management station of an event when a defined condition occurs as a Trap message. The definition condition for notifying the event of the specified management information and the specified key created by the specified key generation unit are set in the Set Re
When it is inserted into a quest message and transmitted to the managed device, the managed device receives the Set Request message, and when the specified key is included in the message, the specified key analysis unit analyzes the specified key. Then, the authority to notify the above event is determined, the authority is recorded as management information together with the definition condition detected in the Set Request message, and the definition condition generated while not having the authority to notify the event A network management system, wherein the number of times is recorded in management information, and the management information is transmitted from the Trap message transmission unit when the authority to notify the event is acquired. 10. The network management system according to claim 9, wherein the management device requests acquisition of management information.
The management device further includes a Get Request message transmission unit that transmits a t message to the managed device, wherein the managed device receives the Get Request from the management device.
A network management system, further comprising a Get Request message receiving unit for receiving a message. 11. A management device for broadcasting data,
In a network management system comprising at least one or more managed devices connected to the management device via a communication network, the management device sends a Set Request message requesting a value change of management information to the managed device. Monitor the events notified from the Set Request message transmission unit and the managed device to be transmitted.
Interface between the Trap message receiving unit that receives the Trap message, the specified key generation unit that creates the specified key used when the managed device determines the transmission right of the Trap message that is the authority to notify the event, and the interface with the administrator A network management unit for designating management information for managing the managed device to be acquired and displaying the management information acquired from the managed device, wherein the managed device is The Set Request message receiving unit that receives the Set Request message, the specified key analysis unit that determines the authority to notify the event using the specified key included in the Set Request message, and the event when the definition condition occurs Trap A Trap message transmission unit for notifying the management station as a message, wherein the management device is the network management unit. The above and defined conditions to notify the events of the specified above management information, and the designated key that was created by the designated key generation unit Te Set Re
When it is inserted into a quest message and transmitted to the managed device, the managed device receives the Set Request message, and when the specified key is included in the message, the specified key analysis unit analyzes the specified key. Then, the authority to notify the above event is determined, and the authority is notified to the above Set Request.
It is recorded as management information together with the definition condition detected in the message. In the communication network, communication from the management device to the managed device uses a satellite line, and communication from the managed device to the management device is on the ground. A network management system, characterized in that, by using a line, the above defined condition is a state in which data cannot be received via the satellite line.