JP2953358B2 - Network monitoring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network monitoring apparatus for monitoring in real time the active state of each node in a network system in which a host computer is connected to a plurality of nodes via a communication control processor and a communication path.

In particular, in a network system in which a host computer is connected to a plurality of terminals via a communication path, each terminal communicates with an application program on the host computer via communication control means, and an application in the host computer The present invention relates to a session state monitoring device that monitors an active state of a session in real time when communication is performed between the apparatuses via a communication control unit.

[0002]

2. Description of the Related Art Monitoring the active state of a plurality of nodes such as terminals connected to a host computer via a communication path has been conventionally performed by the host computer.
For example, Japanese Patent Application Laid-Open No. 2-75046 discloses a node state change detection mechanism for detecting a change in an active state of a node connected to a host, that is, a change from an active state to a non-active state and vice versa. And a node state management mechanism that updates the active state management information of a corresponding node to the latest state each time a change in the active state is detected by this mechanism. The above publication also discloses a technique for notifying another host of the detected active state of a node.

[0003]

By the way, the purpose of monitoring the active state of a node is not only to eliminate wasteful transmission of a command to a node in an inactive state as described in the above-mentioned publication, but also to a fault. The purpose is to monitor the presence or absence of occurrence. That is, for example, if a node that should be in the active state is in the inactive state, it is considered that some failure has occurred in the network.

As described above, since the current active state of each node is grasped by the host computer, if it is desired to know the active state of each node, the node state may be output and checked by an operator command or the like. However, this makes it difficult to know immediately when the active state changes. On the other hand, if the latest active state is notified to the outside each time the active state of the node changes as described in the above-mentioned publication, it is possible to know immediately when the active state has changed. Even after adoption, the following problems remain. (1) Since no notification is issued unless the active state actually changes, for example, an event in which activation has failed due to some failure even though an activation request has been issued to a node in an inactive state When an event occurs, even the occurrence of the event cannot be monitored. (2) Since only the latest active state of each node is managed, it is not possible to know the cause of the state change (for example, due to a request from the host).

An object of the present invention is to monitor the latest active state of a node in real time, not only when the active state of a node has actually changed, but also when the change of the active state has failed. It is an object of the present invention to provide a network monitoring device capable of easily analyzing the cause of the change or the cause of the change failure.

Another object of the present invention is to provide a communication system in which a failure occurs in communication between an application in a host computer and a terminal and between applications in a host computer.
While minimizing the load on the host computer,
An object of the present invention is to improve the reliability and maintainability in the operation of a network system by providing a user with information in real time that can promptly determine the cause of a failure and deal with it.

[0007]

A first network according to the present invention is provided.
In the network monitoring device, the host computer
Connected to a plurality of terminals via the
Communication between the application program in the
Communication between the application program and the terminal
Application programs that communicate between application programs-Applications
Network system with session between programs
The host controlling the two types of sessions
Communication control means in a computer and the communication control means
Within the application program-terminal session, and
Power of the application program-application program session
A session message notification means for acquiring and outputting a sentence;
The message output from the session message notifying means is
Message information stored for each pair of endpoints
Means, and a message is output from the session message notifying means.
Each time the message is stored in the message information storage means.
Along with whether the active state of the session has changed,
Or the feasibility of the criterion of whether the change failed
And when the criteria are met, the session
Message related to the change of the activation status of the server or the failure of the change
Is extracted from the message information storage means, and the extracted message information is extracted.
Report and endpoint names at both ends of the session and the latest
Session state information, including state and matching criteria
A session state information creation notifying means for creating and outputting;
Session output from the session status information creation notification means
Session to save session status information for each endpoint
State management means, and the session state information creation notifying means.
Each time the stage outputs session state information,
Storing session state information in the session state management means.
And the session state information from the session state information
A session state information processor that creates and outputs change notifications
And a stage.

[0008] The second network monitoring device of the present invention comprises:
In the first network monitoring device, the session
State change notification includes both ends identifying the session.
Includes point names and criteria that match the latest status
It is characterized by that.

A third network monitoring device according to the present invention comprises:
In the second network monitoring device, the session status
Searches the session state management means in response to an acquisition request
Session state searcher that sends the search result to the requestor.
It is characterized by having a step.

[0010] A fourth network monitoring device of the present invention comprises:
In the third network monitoring device, the session
Status information creation notification means extracted from the message information storage means
Message information controls session activation and deactivation
It is characterized in that it is limited to only message information.

[0011] A fifth network monitoring device of the present invention comprises:
In the third network monitoring device, the session
Status information creation notification means extracted from the message information storage means
Message information controls session activation and deactivation
The telegram information and a few telegrams and
It is limited to a few telegrams just before the session ends
And

[0012] A sixth network monitoring apparatus of the present invention comprises:
In a fourth network monitoring device, the session
The output destination of the status change notification runs on the host computer.
It is an application program that makes
I do.

[0013] A seventh network monitoring apparatus of the present invention comprises:
In a fourth network monitoring device, the session
The output destination of the status change notification is a user terminal.
I do.

[0014] An eighth network monitoring apparatus according to the present invention comprises:
In a fifth network monitoring device, the session
The output destination of the status change notification runs on the host computer.
It is an application program that makes
I do.

A ninth network monitoring apparatus according to the present invention comprises:
In a fifth network monitoring device, the session
The output destination of the status change notification is a user terminal.
I do.

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described in detail with reference to the drawings.

Referring to FIG. 1, a network monitoring apparatus according to a first embodiment of the present invention comprises a host computer 1
A communication control processor (hereinafter referred to as FEP) 2 connected to the host computer 1 and nodes 3-1 to 3-x connected to the FEP 2 via a communication path L. The computer 1 is further connected to a user terminal 4 including a CRT 4a and a keyboard 4b and a node status management file 5. In the host computer 1, a communication control unit 11 having a control information notifying unit 12, a node state information creation notifying unit 13, a control information storage table 14, a node state information processing unit 1
5 and a node status search means 16.

The nodes 3-1 to 3-x are typically terminals, but may be constituted by other host computers or terminal control devices. Each of the nodes 3-1 to 3-x is assigned a node name that can be uniquely identified on the network. The nodes 3-1 to 3-x are connected to the FEP 2 via a communication path L including a dedicated line, a dedicated network, a local area network, a switching network, and the like. Processing related to establishment and release of a data communication path necessary for communication between the host computer 1 and the nodes 3-1 to 3-x and actual transmission and reception of data are performed by the communication control unit 11 and the FEP 2 in the host computer 1. This is performed according to a predetermined communication protocol.

The control information notifying means 12 provided in the communication control means 11 is a means for outputting control information exchanged between the communication control means 11 and the FEP 2 for controlling a node. The output control information is notified to the node state information creation notifying unit 13. In this embodiment,
Since all the control information transmitted and received for controlling the nodes between the communication control means 11 and the FEP 2 is notified, an activation request of the node transmitted from the communication control means 11 to the FEP 2, a deactivation Requests, F for them
Control information relating to a change in the active state of the node, such as a response from the EP 2 to the communication control unit 11 and a notification of deactivation of the node from the FEP 2 to the communication control unit 11,
Other control information is also notified.

Referring to FIG. 2, the control information storage table 14 constitutes a control information storage means for storing the control information output from the control information notifying means 12 for each node. As shown in FIG.
4 has a header structure H1 to Hx corresponding to each of the nodes 3-1 to 3-x on a one-to-one basis, and the control information related to each node includes, as illustrated in the header structure H1, the header structure H1 to Hx. The corresponding header structures are sequentially connected and stored. H in FIG. 2 is an upper header corresponding to a node name and pointing to the position of the header structure corresponding to the node. As will be described later, when a determination criterion is established for a certain node, node state information is created from the control information stored in the control information storage table 14 for that node, and the currently stored control information is cleared. When the control information of the node appears again, it is newly stored.

The node status information creation notifying means 13 is means for storing control information in the control information storage table 14, determining whether the criterion is established, creating node status information when the criterion is established, and notifying the node information. FIG. 3 shows an example of the processing.
Shown in

Here, in the case of the present embodiment, there are the following three criteria. The node in the inactive state has changed to the active state.The node in the inactive state has failed in activation.The criterion for determining that the node in the active state has changed to the inactive state is as follows. It is determined that the condition is established when the communication control unit 11 issues a request for activation of the node to the node in the active state from the communication control unit 11 to the FEP 2, and then transmits a response to the communication control unit 11 that the process has been normally completed from the FEP 2. You. The criterion is that a request for activating the node is issued from the communication control means 11 to the FEP 2 to the node in the deactivated state, and then a response indicating abnormal termination including the reason code is sent from the FEP 2 to the communication control means 11. It is determined that it has been established at the time of transmission. The communication control means 11 sends a deactivation request to the FEP 2 to the node in the active state to the FEP 2, and the response (including both normal and abnormal) is transmitted from the FEP 2 to the communication control means 1.
1 or when a notification of deactivation of the node is transmitted from the FEP 2 to the communication control unit 11,
It is determined that each has been established. Note that an event in which an activated node fails to deactivate is included in the event.
This is due to the fact that the node which has issued the deactivation request is managed not only when the response is normal termination but also when the response is abnormal termination in the communication control of the communication control means 11.

Referring to FIG. 4, the node status information is
The information includes control information related to a change in the activation state of the node or a failure in the change, the node name of the node, the latest state, and a corresponding criterion.

Referring to FIG. 5, the node status management file 5 constitutes node status management means for storing node status information on a node-by-node basis. As shown in the figure, the node status management file 5 contains each of the nodes 3-1 to 3-1.
3-x has records R1 to Rx corresponding one-to-one.
Each of the records R1 to Rx is a variable-length record and has a record length for storing a plurality of node state information. At the head of each of the records R1 to Rx, there are columns for storing a node name, a state, and a determination criterion. The node name is the node name of the node, and the state is the latest state of the node (active state, (Activation state) is stored as the determination criterion, which is the latest determination criterion, and subsequently, a plurality of node status information is stored in order from the oldest one. When some node state information is stored and new node state information cannot be stored due to the limitation of the maximum record length, the oldest node state information is evicted and new node state information is stored to always store The latest plurality of node state information is held.

Referring to FIG. 6, the node status information processing means 15 stores the node status management file 5 of the node status information.
This is a means for storing the information in the node, creating a node status change notification, and outputting the notification.

Referring to FIG. 7, the node status change notification is obtained by extracting, from the information included in the node status information, information that needs to be notified to the notification destination at a minimum.
In the present embodiment, the state change notification is configured by the node name in the node state information and the matching criterion.

The node state search means 16 is a user terminal 4
Is a means for searching the node status management file 5 in response to a node status acquisition request from the keyboard 4b, and outputting the search result to the CRT 4a of the user terminal 4 as a node status acquisition response. The search conditions include searching for all node status information of all nodes, searching for all node status information for each node specifying a specific node, the current status specifying a specific node, and the control causing the status. Various searches such as information search are possible.

Hereinafter, a network monitoring apparatus according to a first embodiment of the present invention will be described with reference to FIGS.

Communication control means 11 of host computer 1
When the control information for controlling the node 3-1 is transmitted to the FEP 2 from the control information, the control information is picked up by the control information notifying means 12 and notified to the node state information creation notifying means 13.

The node status information creation notifying means 13 is provided in FIG.
The control information notified as shown in (1) is stored in the control information storage table 14 (S1). That is, as shown in FIG.
If the header structure H1 corresponding to the node 3-1 or another control information has already been linked to the header structure H1, it is linked to the last control information. Then, the node state information creation notifying means 13 determines whether or not the criterion is satisfied (S2), and terminates the process if none of the criterion is satisfied.

Similarly, when control information concerning the control of the node 3-1 is transmitted from the FEP 2 to the communication control means 11, this control information is also picked up by the control information notifying means 12, and the node state information creation notifying means 13 And the node state information creation notifying means 13 links this control information to the header structure H1 or the last control information corresponding to the node 3-1 in the control information storage table 14. And
It is determined whether the criterion is satisfied or not, and if none of the criterion is satisfied, the process is terminated.

The above operation is continued until one of the criteria is satisfied for the node 3-1. As a result, as shown in FIG. 2, the control information transmitted and received for controlling the node 3-1 between the communication control means 11 and the FEP 2 is stored in the header structure H1 corresponding to the node 3-1. ,
It is held sequentially until one of the criteria is satisfied.

Now, for example, if it is assumed that the node state information creation notifying means 13 determines that any of the above-mentioned determination criteria is satisfied at the time of processing the control information (N) shown in FIG. The operation is performed. The case where the criterion is established at the time when the control information (N) is processed is the following case. (A) Judgment criteria; control information (N-1) is a request for activation of node 3-1 transmitted from communication control means 11 to FEP2, and control information (N) is a normal end response from FEP2 to the request. If there is. (B) criteria: control information (N-1) is an activation request for node 3-1 transmitted from communication control means 11 to FEP2, and control information (N) is an abnormal end response from FEP2 to the request. If there is. (C) Judgment criteria; control information (N-1) is a request for deactivation of node 3-1 transmitted from communication control means 11 to FEP2, and control information (N) responds thereto from FEP2 (success And the control information (N) is transmitted from the FEP 2 to the communication control unit 11.
Is the deactivation notification of the node 3-1 transmitted to the server.

First, the node status information creation notifying means 13
The node status information is created (S3 in FIG. 3). That is, of the control information linked to the header structure H1 corresponding to the node 3-1 of the control information storage table 14, the control information N, N-1 (where F
Only N in the case of the deactivation notification from EP2), some control information connected immediately after the header structure H1, and some control information connected immediately before the control information that caused the determination criterion. The control information (the number of which is predetermined and the control information that is the cause of the above-mentioned determination criterion being duplicated is excluded) is extracted and the node 3-
The node status information is created by adding the node name of No. 1, the current status of the node 3-1 and the determination criteria established this time. In the node state information illustrated in FIG. 4, two pieces of control information (1) and (2) connected immediately after the header structure H1 and the control information (N-
1), and one piece of control information (N-2) immediately before (N) is included. As described above, the control information (1) and (2) immediately before and immediately after the establishment of the previous determination criterion are extracted in addition to the control information that caused the determination criterion established this time. This is because it is often useful for analysis.
Of course, as another embodiment, only the control information which has caused the current determination criterion to be established may be extracted.

Next, the node status information creation notifying means 13
The node state information created as described above is notified to the node state information processing means 15 (S4), and all the control information linked to the header structure H1 corresponding to the node 3-1 of the control information storage table 14 is transmitted. Delete (S5) and end the process. Therefore, when control information related to the control of the node 3-1 is transmitted and received again between the communication control unit 11 and the FEP2, the control information is connected from the header structure H1.

The node state information processing means 15 notified of the node state information from the node state information creation notifying means 13 stores the notified node state information in the node state management file 5 as shown in FIG. (S11). That is, as shown in FIG. 5, the node status information notified this time is added to the end of the record R1 corresponding to the node 3-1 in the node status management file 5, and the status and the determination criterion of the record R1 are updated. Update to something. As described above, when the maximum record length is exceeded, the oldest node state information in the record is deleted so that some latest node state information is always retained.

At the same time, the node state information processing means 15 includes the node name of the node 3-1 which is the minimum necessary information to be notified to the user terminal 4 and the determination criteria established this time as shown in FIG.
(S12), a node state change notification as shown in FIG.
This is output to the user terminal 4 (S13). The user terminal 4 displays this node state change notification on the screen of the CRT 4a. As a result, the system operator can monitor the active state of the network node in real time.

The details of the node status information are stored in the node status management file 5, and if the user terminal 4 starts the node status search means 16 and performs a search, it may be a cause of the judgment criteria established this time. The contents of control information and the like can be confirmed.

Although the operation of the present embodiment has been described focusing on the node 3-1, the same operation is performed on the other nodes 3-2 to 3-x.

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiments, and various other additions and changes are possible. For example, although the notification destination of the node status change notification and the request source of the node status acquisition request are the user terminals 4 in the above-described embodiments, they may be application programs that operate on the host computer 1. Further, the control information notifying means 12 uniformly notifies not only the control information but also data transmitted / received through communication with the node, and the node state information creation notifying means 13 stores these in the control information storage table 14 and then sets the criteria. The establishment may be determined, and when it is established, necessary control information may be extracted from the control information storage table 14. By doing so, the amount of data stored in the control information storage table 14 increases, but the control information notifying unit 12 does not need to notify control information and data separately.

Thus, the processing of the network monitoring apparatus according to the first embodiment of the present invention is completed.

The network monitoring apparatus according to the first embodiment of the present invention provides control information relating to a change in the active state of a node or a failure in the change, that is, FE from the communication control means.
Node status information including a request for activation or deactivation of a node to P, a response to the request from the FEP to the communication control means, and a notification of deactivation of the node from the FEP to the communication control means is stored in the node state management means. Is held in
By examining them, it is possible to grasp the change in the activation state and the cause of the failure of the change, and this has the effect of clarifying the cause of the failure. In particular, when the activation request from the communication control means is not completed normally, the reason code is included in the response from the FEP, so that the cause of the failure can be easily clarified. ing.

Further, when the active state of a node changes or the change fails, only minimum information such as the node name and the matching criterion is output to the notification destination as a node state change notification, and the remaining information is output to the node. Since the information is stored in the state management unit and can be referred later, the amount of information to be notified to the notification destination can be reduced. Therefore, there is an effect that the traffic of information for notification is reduced and a load applied to a notification destination can be suppressed.

Further, instead of storing all communication contents exchanged between the communication control means and the FEP, only necessary control information is extracted to create node state information.
Since this is stored in the node state management means, it has an effect that resources can be effectively used, unlike storing all communication contents.

Referring to FIG. 8, a network monitoring apparatus according to a second embodiment of the present invention
1 and terminals 82-1 to 82-x connected to the host computer 81 via a communication path L. The host computer 81 is further connected to a user terminal 83 and a session state management file 84. I have. The host computer 81 has a message information notifying unit 812 therein.
A communication control unit 811 having a session state information creation notifying unit 813, a message information storage table 814,
A session state information processing unit 815 and a session state search unit 816;
Application programs 817-1 to 81-81 that communicate with the terminals 82-1 to 82-x or mutually via
7-x is in operation.

The terminals 82-1 to 82-x may be constituted by application programs in another host computer. Each of the terminals 82-1 to 82-x is provided with an endpoint name used for performing communication. The terminals 82-1 to 82-x include a dedicated line, a dedicated network,
Communication path L composed of local network, switching network, etc.
Is connected to the host computer 81 via the. Between application programs 817-1 to 817-x,
Alternatively, application programs 817-1 to 81-1
Communication between the 7-x and the terminals 82-1 to 82-x is performed according to a protocol prepared for each of the application programs 817-1 to 817-x.

The message information notifying means 812 provided in the communication control means 811 includes application programs 817-1 to 817- executed through the communication control means 811.
x and application programs 817-1 to 817-1
The message information of the communication between the 817-x and the terminals 82-1 to 82-x is output, and is notified to the session state information creation notifying unit 813. In the present embodiment, since all the message information transmitted and received in the communication is notified, the session activation request, the deactivation request, and a change in the session activation state such as a response to the request in the communication. In addition to the related message information, all message information passing on the session is notified when the session is activated.

Referring to FIG. 9, the message information storage table 814 constitutes a message information storage unit for storing the message information output from the message information notification unit 812 in pairs of endpoint names at both ends of the session. ing. As shown in the figure, the message information storage table 814 has header components H1 to Hx corresponding to the terminals 82-1 to 82-x and the application programs 817-1 to 817-x, respectively. And sub-header structures H1-1 to H1-x corresponding to communication partners (the other end points) on a one-to-one basis under H1 to Hx. The message information related to each session is that the primary station of the session is the header structure side of the two subheader structures identified by the pair of endpoint names at both ends of the session.
Secondary stations are sequentially connected to and stored in a subheader structure which is a subheader structure. Note that H in FIG. 9 is an upper header corresponding to the endpoint name and pointing to the position of the header structure corresponding to the endpoint name. The header structure points to the position of the sub header structure corresponding to the endpoint name with respect to the endpoint name. As will be described later, when the judgment criteria are satisfied for a certain session, the message information storage table 81 for that session is satisfied.
4, the message status information is created from the message information stored in the storage device 4, the currently stored control information is cleared, and when the message information of the session appears again, the message information is newly stored.

Session state information creation notifying means 813
Indicates storage of the message information in the message information storage table 814;
This is a means for determining the establishment of the criterion, creating session state information when the criterion is satisfied, and notifying the same.

Here, in the case of the present embodiment, there are the following three criteria. The session in the inactive state has changed to activation information.The session in the inactive state has failed in activation.The criterion for determining that the session in the active state has changed to the inactive state is as follows. In a session identified by an activated endpoint name pair, one of the endpoints issues a request to activate the session to the other, and then the other sends a response indicating that the session was successfully processed. It is determined that the condition has been satisfied when transmitted to the original endpoint. In the session identified by the pair of endpoint names that are in the inactive state, one of the endpoints issues a request to activate the session to the other, and then the other processes abnormally including the reason code. It is determined that the response is satisfied when a response indicating that the request has been made is transmitted to the endpoint that is the source of the request. The criterion is that, in the session identified by the endpoint name pair in the activation information, a request to deactivate the session was issued from one endpoint to the other, and then the other successfully processed the session. Is determined to be satisfied when the response is sent to the endpoint that originated the request. In the event that the session in the activation information pair has failed to be deactivated, when the session is finally deactivated,
Is determined to be satisfied. When the process of deactivating the session is abnormal and the session ends abnormally, it is also determined that the condition has been satisfied.

Referring to FIG. 10, the session state information is composed of message information relating to a change in the active state of the session or failure of the change, endpoint names at both ends of the session, and a criterion corresponding to the latest state. Information that includes.

Referring to FIG. 11, the session status management file 84 constitutes session information management means for storing session status information in pairs of the primary station endpoint name and the secondary station endpoint name. I have.
As shown in the figure, the session state management file 84 contains all of the primary and secondary stations when the terminals 82-1 to 82-x and the application programs 817-1 to 817-x respectively communicate. There are records R1 to Rx that correspond one-to-one to the combinations. Each record R1 to Rx
Is a variable length record having a record length for storing a plurality of pieces of session state information. Each record R1 to R
At the beginning of x, there are columns for storing a primary station endpoint name, a secondary station endpoint name, a state, and a criterion. The primary station endpoint name contains the endpoint name of the primary station of the corresponding session. In the next station endpoint name, the endpoint name of the secondary station of the corresponding session, and in the state,
The latest state (activation state, deactivation information) of the session is stored as the determination criterion, and the latest criterion is stored as the criterion, and a plurality of session state information is stored in order from the oldest one. . If some session state information is stored and new session state information cannot be stored due to the limitation of the maximum record length, the oldest session state information is evicted and new session state information is stored, A plurality of latest session state information is always held.

The session state information processing means 815 is a means for storing session state information in the session state management file 84, creating a session state change notification, and outputting the notice.

Referring to FIG. 12, the session state change notification is information extracted from the information contained in the session state information, which is the minimum necessary to notify the notification destination. The primary station endpoint name, the secondary station endpoint name, the state, and the matching criterion constitute a session state change notification.

The session state search means 816 searches the session state management file 84 in response to a session state acquisition request from the user terminal 83, and outputs the search result to the user terminal 84 as a session state acquisition response. is there. Search conditions include searching for all session state information for all sessions, searching for all session state information in session units specifying a specific session, the current state specifying a specific session, and the message that caused the state. Various searches such as information search are possible.

A network monitoring apparatus according to a second embodiment of the present invention will now be described with reference to the session identified by the application program 817-1 as a primary station and the terminal 82-1 as a secondary station. 13 will be described.

When message information is exchanged between the terminal 82-1 and the application program 817-1 via the communication control means 811, the message information is sent to the session state information creation notifying means picked up by the message information notifying means 812. 813 is notified.

Session state information creation notifying means 813
Stores the notified message information in the message information storage table 814.
To be stored. That is, as shown in FIG. 9, the header structure H1 corresponding to the application program 817-1
Header structure H corresponding to terminal 82-1 connected to
1-1 or another message information already exists in the sub-header structure H
If it is linked to 1-1, it is linked to the last message information. Then, the session state creation notifying means 813
It is determined whether or not the criterion is satisfied. If none of the criterion is satisfied, the process is terminated.

The above operation is performed for the relevant session.
The process is continued until one of the criteria is satisfied. As a result, as shown in FIG. 9, the message information flowing through the session by the application program 817-1 and the terminal 82-1 is sequentially held until one of the criteria is satisfied.

First, session state information creation notifying means 81
3 creates session state information. That is, the sub-header structure H1-1 connected to the terminal 82-1 connected to the header structure H1 corresponding to the application program 817-1 of the message information storage table 814 when the determination criteria are satisfied this time And creates session state information loaded with the endpoint name of the application program 817-1 as the primary station and the terminal 82-1 as the secondary station, the current state of the session, and the currently satisfied criterion. . However, in this method, all the message information flowing in the session is managed and saved, so that there is much waste. Therefore, the traffic in the host computer 81 may be reduced by limiting the message information to be extracted to only the message information that caused the criterion to be satisfied. However, in the present embodiment, the satisfied criterion is satisfied. In the case of (because, of course, the criteria are satisfied in advance), the extraction of the message information due to the fulfillment of the criteria, and the predetermined several pieces of message information immediately after the clearing of the message information and the criteria A predetermined number of pieces of electronic message information immediately before satisfying is satisfied. The reason for acquiring the several telegram information immediately after the session activation and the several telegram information immediately after the deactivation is that activation and deactivation of the session at the level of the communication control unit 811 are also important.
In particular, in the case of deactivation, at the level of the communication control unit 811,
This is because, even if it is normally inactivated, an abnormality at a higher level, that is, a protocol level specific to an application program, is important in the operation of a normal network system. Immediately after the session at the level of the communication control means 811 is activated, the activation processing of the association in the OSI model by the protocol at the application program level occurs, and conversely, immediately before the deactivation at the level of the communication control means 811, the association is activated. This is because a deactivation process occurs.
As a result, information stored in the session state management file 84 also becomes smaller.

In this case, the configuration of the message information storage table 814 may be changed as shown in FIG. Four examples of connecting the message information to the subheader structure are prepared, and the message information D1 at the time of transition from the deactivated state to the activated state is prepared.
-1 to D1-x, predetermined several pieces of message information D2-1 to D2-x after the activation state transition, and predetermined several pieces of message information D3-1 to immediately before the deactivation state transition. D3-
x, message information D4-1 to D4 related to deactivation information transition
-X. It is at the position of D1-1 that the message information is connected in the inactive state, and the message information is connected to the end following D1-1 until the judgment criterion or the judgment criterion is satisfied. The message information immediately after satisfying the criteria is
The message information is connected to the end following D2-1 until the predetermined number of message information is connected to the position of D2-1. The message information immediately after the message information linked to the column starting with D2-1 reaches a predetermined number is D3.
Until the predetermined number of pieces of message information are linked, the message information is linked to the end following D3-1. Here, if the number exceeds a predetermined number, the oldest message information is removed, and new message information is linked to the end, so that the latest predetermined number of message information is always D3-. It is linked to the column starting with 1. The first message information that triggers a transition to the deactivated state, such as a deactivation request, is at the position of D4-1, and the message information until the session transitions to the deactivated state is D
Connect to the end following 4-1. If the message information storage table 14 adopts this configuration, the process of linking the message information to the message information storage table by the session state information creation notifying means 13 increases the load, but creates the session state information from the message information storage table 14. Processing can be reduced. Furthermore, if the total number of message information stored in the message information storage table 14 is such that the session is in an active state for a long time and an enormous number of messages flow during that time, the message information storage table 14 is used very efficiently. Can be
There is no need to squeeze a storage medium such as a memory in the host computer 1.

Next, session status information creation notifying means 81
3 notifies the session state information created by the above to the session state information processing means 815, and stores the application program 81 in the message information storage table 814.
Terminal 8 connected to header structure H1 corresponding to 7-1
All the message information linked to the sub-header structure H1-1 corresponding to 2-1 is deleted, and the process ends. Therefore, thereafter, when message information relating to a session in which the application program 817-1 is set as the primary station and the terminal 82-1 is set as the secondary station flows through the communication control unit 811 again, the connection is established by the subheader structure H1-1. Will go.

The session state information processing unit 815 notified of the session state information from the session state information creation notifying unit 813 stores the notified session state information in the session state management file 84. That is, FIG.
As shown in FIG. 1, in the session state management file 84, the last reported session of the record R1 having the primary station endpoint corresponding to the application program 817-1 and the secondary station endpoint corresponding to the terminal 82-1. The state information is added, and the state of the record R1 and the criterion are updated to the latest state. Also, as mentioned above,
When the record R1 exceeds the maximum record length, the oldest session state information is deleted so that the latest several pieces of session state information are always held.

At the same time, session state information processing means 815
Are the primary station endpoint name, the secondary station endpoint name, which are the minimum necessary information to be notified to the user terminal 83,
A session state change notification including the state and the criterion as shown in FIG. 12 is created and notified to the user terminal 83. As a result, the system operator can always monitor the latest session activation state in real time.

Since the detailed message information and the message information at the association level are held in the session state management file 84, the system operator always refers to the session state search means 816 via the user terminal 84 or the like. It becomes possible.

This embodiment is an example of a session in which an application program 817-1 is used as a primary station and a terminal 82-1 is used as a secondary station. Similar operations are performed for sessions in other combinations.

Further, in this embodiment, the notification destination of the session state change notification is the user terminal, but this may be a higher application program. Also, the present invention is a session monitoring device closed in a single host computer, but the host application receives and processes a session state change notification from a session monitoring device in another host computer, and Utilizing the session state search means of the session monitoring device in the system enables real-time monitoring of a session of a large-scale network system by a plurality of host computers. In addition, if the higher-level application program operates as an agent for OSI management, a more global network real-time monitoring system can be constructed in cooperation with other monitoring devices.

With the above, the processing of the network monitoring apparatus according to the second embodiment of the present invention is completed.

The network monitoring apparatus according to the second embodiment of the present invention is capable of transmitting message information related to a change in the active state of a session or failure of the change, that is, a request for session activation between session endpoints, The session state information including the activation request and the response to the request is stored in the session state management means, and can be searched and referred to, so that it is possible to grasp the change of the active state and the cause of the failure of the change. And has the effect of determining the cause of the failure.

In addition, not all the acquired session state information is notified, but most of the acquired session state information is held by the session state management means, and only the minimum necessary contents are notified. Has the effect of being able to reduce

Furthermore, since all the information flowing in the session is not held but only the information necessary for monitoring the state and analyzing at the time of failure is obtained and held, the load on the host computer can be reduced. have.

[0078]

As described above, according to the network monitoring apparatus of the present invention, not only when the active state of a node actually changes but also when the change of the active state fails, the latest active state of the node can be displayed in real time. Monitoring can be performed, and further, there is an effect that the cause of the change in the state or the cause of the failure in the change can be easily analyzed.

Further, the network monitoring device of the present invention
When a failure occurs in communication between the application in the host computer and the terminal or between the application in the host computer, the cause of the failure can be quickly identified and information can be dealt with in real time while minimizing the load on the host computer. By providing to the user,
This has the effect of improving reliability and maintainability in the operation of the network system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a network monitoring device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a control information storage table 14 according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing processing of a node state information creation notifying unit 13 according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of node state information according to the first embodiment of this invention.

FIG. 5 is a diagram illustrating a configuration of a node status management file 5 according to the first embodiment of this invention.

FIG. 6 is a flowchart showing processing of the node state information processing means 15 according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating an example of a node state change notification according to the first embodiment of this invention.

FIG. 8 is a block diagram showing a configuration of a network monitoring device according to a second embodiment of the present invention.

FIG. 9 is a diagram illustrating a configuration of a message information storage table 814 according to the second embodiment of this invention.

FIG. 10 is a diagram showing an example of session state information according to the second embodiment of the present invention.

FIG. 11 is a diagram showing a configuration of a session state management file 84 according to the second embodiment of the present invention.

FIG. 12 is a diagram illustrating an example of a session state change notification according to the second embodiment of the present invention.

FIG. 13 is a diagram showing a configuration of a message information storage table 84 according to the second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Host computer 2 FEP (Communication control processing unit) 3-1-3-x Node 4 User terminal 4a CRT 4b Keyboard 5 Node status management file 11 Communication control means 12 Control information notification means 13 Node status information creation notification means 14 Control Information storage table 15 Node state information processing means 16 Node state search means 81 Host computer 82-1 to 82-x Terminal 83 User terminal 84 Session state management file 811 Communication control means 812 Message information notification means 813 Session state information creation notification means 814 Message information storage table 815 Session state information processing means 816 Session state search means 817-1 to 817-x Application program

Claims (9)

(57) [Claims] 1. A communication control processing device comprising: a host computer;
And connected to a plurality of terminals via a communication path,
Communication between the application program in the remote computer and the terminal
Application program-terminal session for performing
Application programs that communicate between application programs-application programs
Network system with inter-program session
The host computer controlling the two types of sessions.
Communication control means in the data communication means, and a communication between the application program and the terminal in the communication control means.
And the application program-application program
Session electricity correspondence to get the message between sessions output
Notification means and the message output from the session message notification means.
Message information stored in pairs of session endpoints
Report storage means and each time a message is output from the session message notification means.
When the message is stored in the message information storage means,
Whether or not the active state of the session has changed
Or whether the change has failed or not.
When the criteria are met, the
A message related to a change in sexual status or failure to change
Extracted from the stored message information storage means, and
Endpoint names and up-to-date status of both ends of the session
Create session state information that includes criteria that match
Means for notifying and outputting session state information, and a session output from the means for notifying session state information.
Session to save session status information for each endpoint
From the session state management means and the session state information creation notifying means.
Each time state information is output, the session state information is
Stored in the session state management means, and
Create a session status change notification from the session status information
Further comprising a session state information processing means for outputting
Characteristic network monitoring device. 2. The session state change notification includes
Endpoint names that identify the application and the latest status
It is characterized by including the judgment criteria that match Claim
Item 2. The network monitoring device according to Item 1. 3. In response to a session state acquisition request,
Search for session state management means, and use search results as request source
Characterized by comprising a session state search means for notifying
The network monitoring device according to claim 2, wherein 4. The method according to claim 1, wherein
The message information extracted from the message information storage means is
Only the message information that controls the activation and deactivation of the application
4. The network monitoring device according to claim 3, wherein:
Place. 5. The session state information creation notifying means
The message information extracted from the message information storage means is
Message information and session that control the activation and deactivation of
A few telegrams immediately after activation and immediately before the session ends
4. The method according to claim 3, wherein the number is limited to a few telegrams.
Network monitoring device. 6. The output destination of the session state change notification is
Application running on the host computer
5. The network according to claim 4, which is a program.
Network monitoring device. 7. The output destination of the session state change notification is
5. The network according to claim 4, which is a user terminal.
Network monitoring device. 8. The output destination of the session state change notification is
Application running on the host computer
6. The network according to claim 5, which is a program.
Network monitoring device. 9. The output destination of the session state change notification is
6. The network according to claim 5, which is a user terminal.
Network monitoring device.