JP2000324121A - System changeover device in network management system and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system changeover device in a network management system where an operation disabled state by a client unit can be avoided in monitor and control of the network management system adopting a server client system and to provide its method. SOLUTION: Server monitor sections 11, 12 respectively use a health check channel 30 to check the health of opposite servers thereby monitoring the state of them. When the server monitor section 21 of the server monitor sections 11, 21 detects a fault of a current system server 1, the server monitor section 21 issues a server start request (C) to a server management 22. Hardware managements 13, 23 detect a fault in the hardware. Execution managements 14, 24 detect an end of fault in an application. A communication management 15 monitors a connection state of itself to network components 41. Client managements 16, 26 monitor a connection state of them to clients 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to monitoring and control of a server / client type network management system, and more particularly to a system switching device and method in a network management system having a redundant configuration for avoiding an inoperable state from a client device.

[0002]

2. Description of the Related Art In a conventional network management system having a redundant configuration, a method of detecting a server failure by a health check mechanism between servers and switching the servers is generally used. One example is disclosed in
No. 9-116538. The fault tolerant broadband network management system described in this publication has an active system and a standby system, and
The terminal device is connected to the broadband network by the AN. In the broadband network management system, an active system and a standby system are connected to each other through a duplication server of each system, and are synchronized. When a failure occurs in the active system, the standby system automatically starts up and monitors the broadband network. When the active system is restored, the standby system takes over the monitoring of the broadband network to the active system.

[0003]

However, the conventional network management system having a redundant configuration described in Japanese Patent Application Laid-Open No. 09-116538 has the following problems.

[0004] Since the network management system does not use the connection status with the network component (exchange or the like) to be monitored or controlled as a switching factor of the system, the network component (exchange or the like) even if the server is in a normal state. Is not able to connect to the network, and the network management service cannot be provided.

[0005] In the network management system, there is a case that the monitoring and control cannot be performed because the operator cannot connect to the server in the client device that performs monitoring and control because only the normality of the server is a switching factor.

An object of the present invention is to monitor a connection state between a network component (exchange machine or the like) managed by a network management system and a client that actually monitors and controls, and to use it as a switching factor, thereby enabling operation from a client device. An object of the present invention is to provide a highly reliable network management system by avoiding a failure such as a failure to perform.

[0007]

A system switching device in a network management system according to the present invention includes a client-side terminal device connected to a network, and a server that monitors and controls communication on the network.
Having a plurality of the servers, each of the servers monitors the state of each partner system, further monitors the connection state of the terminal device, and determines that the server needs to be switched from the respective monitoring states, Switching the network management system.

[0008] A system switching method in a network management system according to the present invention includes two terminals, an active system and a standby system, each including a client-side terminal device connected to a network, and a server for monitoring and controlling communication on the network. Having the server, each of the servers being connected by a line and monitoring the status of each of the other servers, the standby server monitoring the connection status between the active server and the terminal device, When it is determined from the monitoring state that the server needs to be switched, the server is switched.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a server / client type network management system having a redundant configuration using two servers. A highly reliable network management system that avoids the inoperable state of the client device by monitoring the target network components (exchanges, etc.) and the connection status with the client device that performs monitoring and control and using it as a switching factor. is there.

An embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is a diagram showing a configuration of a system switching device of the present invention.

Referring to FIG. 1, an active server 1 and a standby server 2 are connected to a client device 40 and network components 41 via a plurality of service networks (TCP / IP) 31. Further, the active server 1 and the standby server 2 are connected to each other by a health check line (TCP / IP) 30. In the network management system, the redundant configuration processes 10 and 20 monitor the connection status of the network component 41 and the client device 40 in addition to a mechanism for detecting a health check failure, a hardware failure, and an execution process failure between the respective servers. When it is determined that server switching is necessary, the redundant configuration processes 10 and 20 switch from the active server 1 to the standby server 2 for use. Switching can continue to provide network management services.

The active server 1 and the standby server 2 have redundant configuration process groups 10 and 20, respectively.
The server monitoring units 11 and 21 mutually perform a health check using the health check line 30, and monitor the state of the partner server. Here, the server monitoring units 11 and 21
Issues a server start request c to the server management 22 when the server monitoring unit 21 of the standby server 2 detects a failure of the active server 1. Hardware management 13, 23
Detects a hardware failure. Execution management 14,2
4 detects an abnormal termination of the application. The communication management 15 started only in the active server 1 monitors the connection state with the network component (exchanger, etc.) 41. The client management 16, 26 is the client 40
Monitor the connection status with.

When a fault is detected, a fault notification a is issued to the fault managements 17 and 27. The failure management 17 of the active server 1 that has received the failure notification a analyzes the failure information, and if it is determined that the switching is necessary, the failure management 17
Issues a server switching request b. Backup server 2
When the failure management 27 receives the failure notification a, the lock processing is performed so that switching from the active server 1 to the standby server 2 cannot be performed. Server management 12, 22
Upon receiving the server switching request b and the server activation request c, the server switching and activation processing is executed.

The network management system having a redundant configuration of the two servers 1 and 2 is used not only for server failure but also for the network component 41 to be monitored and controlled and the operator to perform monitoring and control. Since the connection state of the client device 40 is also monitored as a switching factor, a highly reliable network management system is provided.

The configuration of the embodiment has been described in detail above. The server monitoring mechanism based on health checks performed by the server monitoring units 11 and 21 and the fault detection mechanism performed by hardware management and execution management are described below. Since this is a general failure detection mechanism in a network management system having a redundant configuration and is not directly related to the present invention, its detailed configuration is omitted.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS.
This will be described in detail with reference to FIG. FIG. 2 is a diagram showing a server switching operation by detecting a connection failure with a network component according to the present invention. FIG. 3 is a diagram illustrating a server switching operation based on detection of a connection failure with a client device according to the present invention.

Referring to FIG. 2, network element 41
The operation of server switching by detecting a connection failure with the server will be described.

Referring to FIG. 2, upon detecting a connection failure with the network component 41, the communication management 15 issues a failure notification a to the failure management 17 (A2-1). The failure management 17 issues a health check request b to the failure management 27 of the standby server 2 (A2-2). Fault management 1
7 and 27 execute a health check on all the network components 41 (A2-3), and
The fault management 27 notifies the fault management 17 of the active server 1 of the execution result c (A2-4). The failure management 17 of the active server 1 determines that the number of network components 41 in which the connection has failed exceeds the specified upper limit.
A server switching request d is issued to the server management 12 (A2-5), and the server switching process is executed by the server management 12.

Next, referring to FIG.
The operation of server switching by detecting a connection failure with the server will be described. As shown in FIG.
Performs a health check at regular intervals for all the client devices 40 connected to the service network 31 (A3-1), and when a connection failure is detected for all the client devices 40, a failure notification is sent to the failure management 17, 27. is issued (A3-2). The fault management 17 of the active server 1 includes the standby server 2 and the client device 4
If the connection of No. 0 is normal, a server switching request b is issued to the server management 12 (A3-3), and the server switching processing is executed by the server management 12.

Next, another embodiment of the present invention will be described in detail with reference to FIG. FIG. 4 is a diagram showing the operation of another embodiment of the present invention.

In another embodiment of the present invention, the basic configuration is as described above, but a health check mechanism between servers is further devised. The configuration is shown in FIG. In the figure, the server monitoring units 11 and 21 execute a health check by using the health check line 30 to monitor the partner server (A4-1). Here, when the health check fails, the health check is executed using the service network 31 to which a plurality of services are connected next (A4-2). Only when the health check fails for all routes, the partner server is determined to be faulty. If the standby server 2 detects a failure of the partner server, the standby server 2 issues a server start request a to the server management 22 to execute the start processing with the standby server 2 as the active server.

[0022]

The system switching device in the network management system according to the present invention monitors the connection state with the network components (exchanges and the like) and uses it as a switching factor. Therefore, the system switching device switches to a server whose connection with the network components is normal. It is possible to avoid the occurrence of network elements that cannot be used and services cannot be performed.

Further, since the network management system monitors the connection state with the client device and uses it as a switching factor, it is possible to prevent the operation from the client device from becoming unexecutable and to provide a network management service.

As described above, in this embodiment, since the health check mechanism for monitoring between servers is executed using a plurality of paths, an effect is obtained that the state of the server can be monitored more accurately.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a system switching device of the present invention.

FIG. 2 is a diagram illustrating a server switching operation based on detection of a connection failure with a network component according to the present invention.

FIG. 3 is a diagram illustrating an operation of switching a server by detecting a connection failure with a client device according to the present invention.

FIG. 4 is a diagram showing the operation of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Active server 2 Spare server 10 Redundant configuration process 11 Server monitoring unit 12 Server management 13 Hardware management 14 Execution management 15 Communication management 16 Client management 17 Fault management 20 Redundant configuration process 21 Server monitoring unit 22 Server management 23 Hardware management 24 execution management 26 client management 27 fault management 30 health check line 31 service network 40 client device 41 network component

Claims (6)

[Claims] 1. A client-side terminal device connected to a network, and a server for monitoring and controlling communication on the network, comprising a plurality of the servers, each of which is connected by a line, and A system in a network management system characterized by monitoring a status of a partner server, further monitoring a connection status of the terminal device, and switching the server when it is determined from the respective monitoring statuses that the server needs to be switched. Switching device. 2. The server according to claim 1, wherein the plurality of servers are an active server that normally monitors and controls the network, and a standby server that operates when a failure occurs in the active server. A system switching device in the network management system according to the above. 3. The standby server further comprises: a server monitoring unit for performing a check by using the line to monitor the status of the active server, and issuing a server start request when detecting a failure of the active server. Hardware management for detecting a hardware failure, execution management for detecting an abnormal termination of an application, client management for monitoring a connection state with a client and issuing a failure notification when a failure is detected, The failure information is analyzed, and when it is determined that the switching is necessary, the server management issues a server switching request to the server management, and executes the server switching and startup processing in response to the server switching request and the server startup request. 3. The network according to claim 2, further comprising: server management. System switching device in a click management system. 4. The active server checks each other by using the line to monitor the status of the standby server, issues a server start request, and detects a hardware failure. Hardware management, execution management for detecting abnormal termination of applications, client management for monitoring the connection status with the client and issuing a failure notification when a failure is detected, analysis of failure information based on the failure notification, and switching If the server management request is determined to be necessary, the server management issues the server switching request and the server startup request to issue a server switching request to the server management, and executes the server switching and startup processing; and the connection of the network components as exchanges. Communication management for monitoring the status. System switching device in the network management system of claim 2 or 3 wherein. 5. A server comprising a client-side terminal device connected to a network, and a server for monitoring and controlling communication on the network. A server is connected by a line and monitors the status of each of the other servers, the standby server monitors the connection status between the active server and the terminal device, and switching of the server from the respective monitoring status is performed. A system switching method in a network management system, wherein the server is switched when it is determined that the server is necessary. 6. The system according to claim 5, wherein said active server and said standby server are connected by a dedicated line for monitoring the status of each of the other servers.
Switching method in the network management system described in the above.