JP4596750B2 - Redundant network management system switching automatic detection method, redundant network management system, monitoring program, and network management system program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a duplexed network management system, and in particular, when an active system is switched due to a system abnormality or the like, a switching network automatic detection method for a duplexed network management system for notifying an operator that the network management system has switched, and a duplexed network The present invention relates to a management system, a monitoring program, and a network management system program.
[0002]
[Prior art]
A network management system is required to have high reliability. One way to increase reliability is to duplicate the network management system. In this system, two network management systems with the same configuration are prepared. One is an active system that performs normal operation, and the other is a standby system. If an abnormality occurs in the active system, the standby system is newly operated. By switching to the system and continuing operation, it is possible to prevent a network non-monitoring state due to a network management system going down.
[0003]
Conventionally, in order to duplicate the network management system, a dedicated application for realizing the duplication has been introduced separately from the network management system from the viewpoint of development cost.
[0004]
[Patent Document 1]
JP-A-8-163165 [0005]
[Problems to be solved by the invention]
An operator who operates the duplicated network management system can handle the network management system as if there was only one. Therefore, even if a redundant network management system is switched due to a system error, the operator may not immediately notice. This delays the maintenance of the network management system, leading to a decrease in the reliability of the service provided.
[0006]
An object of the present invention is to solve the above-mentioned problems, and has a function of automatically detecting switching to a client terminal side when a redundant network management system is switched due to a system abnormality. By doing so, it is possible to quickly maintain the network management system.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, in a network management mode in which a duplexed network management system is operated from a terminal via a network, when the operator accesses the duplexed network management system from the terminal, the duplexed network management system is duplicated. A monitoring program is acquired from the network management system, and the acquired monitoring program is started on the terminal.
[0008]
The monitoring program activated at the terminal periodically transmits a communication request to the representative IP address of the duplicated network management system. The representative IP address is a virtual address, and when this address is accessed, it is connected to the operating system of the duplex network management system.
[0009]
Upon receiving the communication request, the duplexed network management system returns its own IP address as response information to the terminal. The returned IP address is an active IP address in the duplex network management system. Therefore, when the duplexed network management system is switched due to an abnormality or the like, the response information is also the IP address of the one switched from the standby system to the active system.
[0010]
The monitoring program started at the terminal stores the IP address received from the duplexed network management system, determines that the duplexed network management system has switched when the stored IP address changes, and the terminal By displaying the switched information on the screen, the operator can detect that the switched network management system has been switched.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of the entire network system according to the embodiment of the present invention. This network system includes a client terminal 1, a duplex network management system 2, and a communication network 3 that connects the client terminal 1 and the duplex network management system 2.
[0012]
The client terminal 1 includes a screen display unit 11 that displays operation results, alarms, and the like on a screen, and a monitoring program control unit 12 that acquires and executes a monitoring program from the redundant network management system 2.
[0013]
The duplexed network management system 2 includes an active network management system 21 (hereinafter referred to as an active system 21), a standby network management system 22 (hereinafter referred to as a standby system 22), and an active system 21 and a standby system. The shared data storage unit 23 that stores data common to the system 22 (for example, data on the status of managed devices such as routers and servers), and the standby system 22 operates when a system abnormality occurs in the active system 21 And a communication line 24 for transmitting a switching signal for switching to the system.
[0014]
The active system 21 sends a monitoring program to the client terminal 1 in response to an access from the client terminal 1 and returns a response to communication from the monitoring program, and when a system abnormality occurs in the active system Control the process for switching the standby system to the active system, and transmit a switching signal to the communication line 24; status monitoring for managed devices such as communication devices (eg, routers) and servers; The network management unit 213 executes management operations such as data setting. The network management unit 213 represents functions of a general network management system for convenience.
[0015]
The standby system 22 has the same configuration as the active system 21, and sends a monitoring program to the client terminal 1 in response to access from the client terminal 1 and returns a response to communication from the monitoring program 221. A duplex control unit 222 that controls processing for switching the standby system to the active system when a system abnormality occurs in the active system, and transmits a switching signal to the communication line 24; and a managed device such as a communication device or a server And a network management unit 223 that executes management operations such as status monitoring and data setting.
[0016]
When accessing the duplexed network management system 2 from the client terminal 1, an IP address for specifying the access destination is required. The IP address of the access destination is controlled by the duplexing control unit 212 and the duplexing control unit 222. A virtual IP address (representative IP address) is designated.
[0017]
When the virtual IP address is accessed, the active system 21 can be automatically accessed. Further, when the virtual IP address is accessed after switching to the standby system 22 due to a system abnormality of the active system 21, the standby system 22 is automatically accessed. That is, the operator who operates the client terminal 1 does not need to be aware of whether the operating system 21 or the standby system 22 is accessed. Note that real IP addresses are assigned to the active system 21 and the standby system 22, respectively.
[0018]
A specific mechanism for automatically accessing the active system 21 when the client terminal 1 accesses the virtual IP address of the duplicated network management system 2 is, for example, as follows.
[0019]
For example, Linux or the like has a function of setting another IP address (alias IP address) in addition to a normal IP address in one network interface. This function is called IP alias. The IP address dynamically assigned using the IP alias is called a virtual IP address, and the virtual IP address of the network management system 2 in which the client terminal 1 is duplicated by dynamically assigning the virtual IP address to the active system 21 When accessing, the active system 21 is automatically accessible.
[0020]
When the client terminal 1 specifies a virtual IP address and accesses the active system 21, the monitoring program control unit 12 of the client terminal 1 acquires the monitoring program from the monitoring response unit 211 of the active system 21, and the acquired monitoring program Execute.
[0021]
The monitoring program periodically accesses the monitoring response unit 211 of the active system 21 by designating the virtual IP address, and the monitoring response unit 211 that receives the access returns the real IP address of the active system 21 as a response. The monitoring program stores the IP address value received as a response.
[0022]
Here, it is assumed that a system failure has occurred in the active system 21, a switching signal is transmitted from the duplex control unit 212 to the duplex control unit 222 via the communication line 24, and the standby system 22 becomes a new active system. After this, when the monitoring program specifies the virtual IP address and accesses the duplicated network management system 2, it automatically accesses the monitoring response unit 221 of the standby system (new active system) 22 and receives the access. The monitoring response unit 221 returns the real IP address of the standby system (new operation system) 22 as a response to the monitoring program.
[0023]
Here, since the value of the IP address received by the response is different from the stored IP address, the monitoring program determines that the duplexed network management system 2 has been switched, and has switched to the screen display unit 11. Command to output a message to notify.
[0024]
FIG. 2 is a diagram illustrating an example of a switching monitoring process flow of a duplexed network management system.
[0025]
When the monitoring program control unit 12 of the client terminal 1 designates a virtual IP address and makes an HTTP access to the duplicated network management system 2, it automatically accesses the active system 21 (A in FIG. 2).
[0026]
The monitoring program control unit 12 acquires the monitoring program from the active system 21 (B) and starts the monitoring program (C). The activated monitoring program designates the virtual IP address of the duplicated network management system 2 and periodically makes HTTP access to the active system 21 and receives a response from the active system 21 (D).
[0027]
The real IP address of the active system 21 is included in this response information. The monitoring program stores the value of the real IP address received as a response. Here, when a system failure occurs in the active system 21 (E), the standby system 22 becomes a new active system by switching and the connection destination of the access specifying the virtual IP address is changed to the standby system 22 (F). .
[0028]
After the connection destination is changed, when the monitoring program designates a virtual IP address and makes an HTTP access (G), it automatically accesses the standby system (new active system) 22 and responds from the standby system (new active system) 22. Receive. The response information includes the actual IP address of the standby system (new operation system) 22.
[0029]
The monitoring program confirms that the real IP address received in the response is different from the stored real IP address, and confirms that the redundant network management system 2 has been switched to the screen display unit 11. Instruct the message to be displayed on the screen (H), and the screen display unit 11 displays the message on the screen according to this command (I).
[0030]
FIG. 3 is a diagram illustrating a processing flow of the monitoring response unit. As shown in FIG. 3, the monitoring response unit 211 of the active system 21 (same as the monitoring response unit 221 of the standby system 22) sends a monitoring program to the client terminal 1 during the initial access with respect to HTTP access from the client terminal 1. The real IP address is returned as a response to the HTTP access from the monitoring program activated on the client terminal 1.
[0031]
FIG. 4 is a diagram illustrating a processing flow of the duplexing control unit. As shown in FIG. 4, the duplexing control unit 212 of the active system 21 monitors the network management by the network management unit 213 (a in FIG. 4). When a failure occurs in the active system 21, the duplex control unit 212 issues a stop command to the network management unit 213 to cause the network management stop process (b).
[0032]
Next, the duplex control unit 212 transmits the switching signal to the duplex control unit 222 of the standby system 22 (c). The duplex control unit 222 issues a startup command to the network management unit 223 (d), and causes the network management unit 223 to perform startup processing. Thereafter, the duplex control unit 222 monitors network management by the network management unit 223 (e).
[0033]
【The invention's effect】
As described above, according to the present invention, when a duplexed network management system is switched due to a system error or the like, the client terminal that operates the duplexed network management system automatically detects the switching. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a block diagram of an entire network system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of a switching monitoring process flow of a duplexed network management system.
FIG. 3 is a diagram illustrating a processing flow of a monitoring response unit.
FIG. 4 is a diagram illustrating a processing flow of a duplex control unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Client terminal 2 Duplexed network management system 3 Communication network 11 Screen display part 12 Monitoring program control part 21 Active system 22 Standby system 23 Shared data storage part 24 Communication line 211,221 Monitoring response part 212,222 Duplexing control part 213 223 Network Management Department

Claims (4)

It is composed of an active system and a standby system that can be operated from a client terminal via a network, and real IP addresses are individually assigned to the active system and the standby system, and further used when the client terminal accesses. the actual IP address switching of the network management system that is duplicated is assigned different representatives IP address and the client terminal is a method for automatic detection,
Said client terminal, the steps of acquiring a monitoring program for monitoring the pre-punch Ttowaku before accessing the management system switching of kine Ttowaku management system,
And the process to start before Ki監 vision program,
Kimi IP address prior to inclusion in said specifying the representative IP address by the execution of the monitoring program periodically accesses before mallet Ttowaku management system, received from the operating system before the pressure rams Ttowaku management system response When the response is received next time, the actual IP address included in the received response is compared with the stored actual IP address. If the value of the actual IP address is different, the network management system automatic detection method switching of the duplex network management system characterized by having the steps of detecting the switching of the front ram Ttowaku management system by determining and switched. Operable from the client terminal via the network, consists of a working system and the standby system, the operating system and the real IP address individually and the standby system are allocated, used when further said client terminal accesses, A network management system in which a representative IP address different from the real IP address is assigned,
If the abnormality occurs in the active system, the duplexing control unit performs control you switch between the standby system and the active system,
Means for sending a monitoring program to the client terminal in response to a monitoring program acquisition request from the client terminal;
To regular access the specified representative IP address from the previous Ki監 view program, the current of the operating system of the device sends back a response including the real IP address to the monitoring program of the client terminal, in the response A duplex network management system comprising: a monitoring response unit that causes the monitoring program to determine whether or not the network management system has been switched based on an actual IP address included therein. It is composed of an active system and a standby system that can be operated from a client terminal via a network, and real IP addresses are individually assigned to the active system and the standby system, and further used when the client terminal accesses. the actual IP address switching of duplexed network management system are assigned different representatives IP address and the client terminal is a monitor program for automatic detection,
And a process of regular access to the punch Ttowaku management system before specifying the previous Kiyo table IP address,
Stores you IP address before being included in the response received from the previous the operating system of the pressure rams Ttowaku management system, the next time a response is received, the real IP address included in the received response, and the memory comparing the actual IP address, if the value of the actual IP address is different, and a process of detecting the switching of the front ram Ttowaku management system by determining that the network management system has switched,
A monitoring program for causing a computer of the client terminal to execute. Operable from the client terminal via the network, consists of a working system and the standby system, the operating system and the real IP address individually and the standby system are allocated, used when further said client terminal accesses, A program for causing a computer of a network management system to be assigned a representative IP address different from the real IP address ,
If the abnormality occurs in the active system, a process of performing control switch between the standby system and the active system,
A process of transmitting a monitoring program to the client terminal in response to a monitoring program acquisition request from the client terminal;
To regular access the specified representative IP address from the previous Ki監 view program, the current of the operating system of the device sends back a response including the real IP address to the monitoring program of the client terminal, in the response Processing for causing the monitoring program to determine whether or not the network management system has been switched based on the included real IP address;
A program for a network management system to be executed by the computer.

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