JPH0787088A - Network monitor form decision device - Google Patents

Abstract

PURPOSE:To always monitor a network optimizingly by revising a monitoring form depending on a change in the network configuration due to addition of a monitored node or a monitored line and on a tentative change in the network configuration due to a fault of the monitored node or line. CONSTITUTION:At first a concerned monitored node number is sent from a transmission means in each monitored node 20 to each monitoring node 10. A relay number calculation means 14 calculates number of times of relay of monitored nodes to be relayed from each monitoring mode 10 to each monitored node 20 for each monitoring node 10 based on the concerned monitor node number. Then a monitor form decision means 15 compares number of times of relay to a same monitored node among each the monitoring nodes and decides a monitoring form so as to share the monitored node with a monitoring node whose relay number is minimized. Even when a change in the network configuration takes place due to addition or a monitored node or line and due to a fault in the monitored node or line, each monitoring node monitors the monitored node whose relay number of times is minimized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network monitoring mode determining apparatus for dynamically determining a monitoring mode of each monitored node in a network including a plurality of monitoring nodes and monitored nodes.

[0002]

2. Description of the Related Art In a communication network, a monitoring node collects statistical information such as the traffic status and usage status of the communication network and changes the scale and configuration of the network. Further, the monitoring node is an exchange node (hereinafter, referred to as a monitored node) that constitutes a network.
It monitors the real-time status such as the operating status of and the line failure.

Further, in recent years, networks have been increasing in scale, and the components of the network have been changed to those having higher and more complicated mechanisms. Therefore, the network monitoring load was distributed as a whole by installing multiple monitoring nodes.

In this case, each monitoring node is required to optimally share the target range of the monitored node. For example, as shown in FIG. 13, as a network monitoring form, the monitoring node 10A is connected to the monitored node 2 through the line 1.
Monitor 0-2, 20-6, 20-9. Monitoring node 1
OB monitors the monitored nodes 20-1, 20-3, 20-4. The monitoring node 10C is a monitored node 20-5, 2
Monitor 0-7, 20-8.

Further, as shown in FIG. 14, it is assumed that a monitoring node 10B among a plurality of monitoring nodes cannot be monitored due to, for example, a failure or maintenance. In this case, the monitoring node 10A takes over the monitored nodes 20-1 and 20-3 shared by the monitoring node 10B and monitors them. Further, the monitoring node 10C takes over the monitored node 20-4 shared by the monitoring node 10B and monitors it.

[0006]

As described above, the allocation of each monitored node to the monitoring node is uniquely determined when the network is set up. Further, when the monitoring becomes impossible due to a failure of a certain monitoring node, the taking over of the sharing of the monitoring by other monitoring nodes was uniquely determined when the network was designed.

Therefore, when the network becomes large in scale, it becomes difficult to design the network monitoring mode. Also,
When the network topology changed due to the change of the network configuration, the network monitoring form had to be designed again. Further, if the design of the network monitoring form is not optimal, there is a risk that the distribution of the network monitoring load will be abnormal and the communication of network users will be adversely affected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform network monitoring by dynamically designing a network monitoring mode. It is to provide a shape determining device.

[0009]

The present invention has the following constitution in order to solve the above problems. That is, the network monitoring form determining device of the present invention changes the monitoring form according to a change in the network configuration due to the addition of monitored nodes or lines and a temporary change in the network configuration due to a failure of the monitored nodes or lines. It always performs optimal network monitoring. FIG. 1 is a principle diagram of the present invention, and the present invention will be described with reference to FIG.

The apparatus comprises a plurality of monitoring nodes 10 and a plurality of monitored nodes 20 monitored by the plurality of monitoring nodes 10 through the line 1. Each of the monitored nodes 20
Transmission means 2 for transmitting its own node number to each monitoring node 10
4 is provided.

Each of the monitoring nodes 10 includes a relay number calculating means 14 and a monitoring mode determining means 15. The number-of-relays calculating unit 14 calculates the number of relays of the monitored node to be relayed from each monitoring node 10 to each monitored node 20 for each monitoring node 10 based on the own node number from the transmission unit 24.

The monitoring mode determining means 15 compares the number of relays for the same monitored node among the monitoring nodes, and determines the monitoring mode so that the monitored node is assigned to the monitoring node having the minimum number of relays. .

Here, the relay number calculation means 14 and the transmission means 24 may be a monitoring form determination protocol. Also,
Furthermore, each of the monitoring nodes 10 includes a monitoring mode determination command unit 13 that activates the relay number calculation means 14 by inputting a command when the number of the lines 1 or the monitored nodes 20 increases.

Then, the monitoring mode determining means 15 compares the number of relays with respect to the same monitored node between the respective monitoring nodes based on the number of relays changed with the increase of the line 1 or the number of monitored nodes 20 and relays the relays. The monitoring mode is changed so that the monitored node is assigned to the monitored node having the minimum number of times.

Here, the monitoring mode determination protocol 14 in the monitoring node 10 to which the command is input transmits monitoring mode determination start instruction data to each monitored node 20. Each monitored node 20 sends a monitoring target notification data unit in which the self-monitored node number is the transmission source, the node number of the monitoring node 10 is the transmission source, and the relay count is 0.
It may be transmitted to.

Each monitored node 20 adds 1 to the number of times of relay when the monitored data unit is relayed. As a result, each monitoring node can calculate the number of relays between each monitored node and itself. Then, each monitoring node 10 monitors the monitored node 20 having the shortest distance from itself.

The monitoring node 10 and the monitored node 20
If the distances between and are the same, it is advisable to provide a rule such that the monitoring nodes with smaller node numbers have priority among the monitoring nodes.

Further, each monitored node 20 monitors each other to detect an abnormality occurring in one of the monitored nodes and activates the relay number calculation means 14 to monitor the monitored nodes. 26 is provided.

Then, the monitoring mode determining means 15 compares the number of relays with respect to the same monitored node between the respective monitoring nodes based on the number of relays changed due to the abnormality of any one of the monitored nodes and relays the relays. The monitoring mode is changed so that the monitored node is assigned to the monitored node having the minimum number of times.

Here, the monitored node 20 adjacent to the monitored node in which the abnormality has occurred notifies the monitored node 10 and the relay number calculation means 14 is activated when the monitored node does not recover within a certain time. You may do it. Alternatively, when a monitored node that has not returned within a certain time period returns after a certain period of time, the monitored node itself may notify the monitoring node.

Further, each monitoring node 10 is provided with a monitoring node monitoring unit 16 which detects an abnormality occurring in any one of the monitoring nodes by mutually monitoring and activates the relay number calculation means 14.

Then, the monitoring mode determining means 15 compares the number of relays with respect to the same monitored node between the respective monitoring nodes based on the number of relays changed due to the abnormality of any one of the monitoring nodes, and repeats the number of relays. The monitoring mode is changed so that the monitored node is assigned to the monitoring node with the minimum.

[0023]

According to the present invention, first, the transmitting means 24 in each monitored node 20 transmits its own monitored node number to each monitored node 10. The relay count calculation means 14 calculates the relay count of the monitored node to be relayed from each monitoring node 10 to each monitored node 20 for each monitoring node 10 based on the self-monitored node number.

Then, the monitoring mode determining means 15 compares the number of relays for the same monitored node among the monitoring nodes and determines the monitoring mode so that the monitored node is shared by the monitoring node having the minimum number of relays. This simplifies network design work.

Further, even if a monitored node or line is added or the network configuration changes due to a failure of the monitored node or line, each monitoring node responds to this change and monitors the monitored node that minimizes the number of relays. Therefore, optimum network monitoring can always be performed.

[0026]

EXAMPLES Specific examples of the present invention will be described below.
FIG. 2 is a block diagram showing the configuration of an embodiment of the network monitoring mode determining device of the present invention. In FIG. 2, the apparatus is provided with three monitoring nodes 10 (10A, 10B, 10C) and nine monitored nodes 20 (20-1 to 20-9, node numbers 010 to 090). Each monitoring node 10
A line 1 is connected between the monitored nodes 20 and the monitored nodes 20 and between the monitored nodes 20 to form a network.

Three monitoring nodes 10A, 10B, 10C
Are the nine monitored nodes 20-1 and 20-2 in the network.
Monitor by sharing 0-9. Further, in the device shown in FIG. 2, the monitored node 2 is different from the device shown in FIG.
Line 1 is added between 0-9 and the monitored node 20-7.

FIG. 3 is a configuration block diagram of the monitoring node. In FIG. 3, each monitoring node 10A, 10B, 1
A line 1 and a console 2 are connected to 0C. Each of the monitoring nodes 10A, 10B, and 10C has a console control unit 11 that controls the console 4 and a communication protocol control unit 12 that controls the line 1.

Further, each monitoring node 10A, 10B, 10
C has a monitoring mode determination command unit 13, a monitoring mode determination protocol 14, a monitoring mode determination unit 15, an inter-monitoring node monitoring unit 16, and a network monitoring unit 17.

The monitoring mode determination command section 13 activates the monitoring mode determination protocol 14 in response to an operator command instruction from the console 4 through the console control section 11. When a network element (for example, a monitoring node, a monitored node, or a line) is added or deleted, the operator inputs a command when the work of adding or deleting the line 1 is completed.

This is the monitored node 2 in the network.
This is because, when 0 or the line 3 is added or deleted, the number of relays of the monitored node 20 adjacent to it changes.

The monitoring mode determination protocol 14 transmits a monitoring mode determination start instruction unit to determine the network monitoring mode to all the monitoring nodes 20, and receives a monitoring target notification data unit from each monitored node 20.

The monitoring form determining protocol 14 is a monitored node to be relayed from each monitoring node 10 to each monitored node 20 for each monitoring node 10 based on the self-monitored node number included in the monitored object notification data unit. Calculate the number of relays of.

The monitoring mode determination protocol 14 has a list section 18 for storing the obtained number of times of relaying. The list unit 18 stores the number of relays of each monitored node for each monitoring node.

The monitoring mode determining unit 15 receives the number of relays of each monitored node for each monitoring node stored in the self and other list units 18 via the monitoring mode determining protocol 14 and the communication protocol control unit 12. Monitoring form determination unit 15
On the basis of the number of times of relaying, the number of times of relaying with respect to the same monitored node among the monitoring nodes is compared, and the monitoring mode is determined so that the monitored node is shared by the monitoring node having the minimum number of times of relaying.

The monitoring node monitoring unit 16 detects that the system of another monitoring node 10 has gone down by performing mutual monitoring, and if the monitoring node 10 does not recover within a fixed time, the monitoring mode determination protocol 14 To start. The network monitoring unit 17 performs basic monitoring of the network.

FIG. 4 is a block diagram of the monitored node. In FIG. 4, each monitored node 20 has a line 1
Are connected. Each monitored node 20 has a communication protocol control unit 22, a monitoring form determination protocol 24, a monitoring form determination unit 25, and a monitored node monitoring unit 26.

The monitoring mode determination protocol 24 receives the monitoring mode determination instruction data unit from all the monitoring nodes 10, transmits the monitoring target notification data unit to all the monitoring nodes 10, and sets the number of relays of the line 1. .

Each monitoring form determination protocol 24 transmits the monitoring target notification data unit in which the own node number is set for all the monitoring nodes 10 and the initial value "0" of the number of relays is set. The monitored node 20 to be relayed receives the monitoring target notification data unit from another monitored node 20,
Add 1 to the number of relays.

The monitoring mode determining unit 25 is notified of the final monitoring mode determination result from the monitoring node 10 and recognizes the monitoring node 10 that should monitor itself. Monitored node monitoring unit 2
6 monitors the other monitored node 20 via the communication protocol control unit 22 to make the other monitored node 20
Detects that the system is down and activates the monitoring mode determination protocol 14. <Operation of Embodiment> Next, the operation of the embodiment thus configured will be described. FIG. 5 is a flow chart showing the allocation decision of the monitored node executed by the monitoring node. (1) Operation by Command Input by Operator Here, as shown in FIG. 2, for example, the monitored node 20
A case in which the line 1 is added between the node 9 and the monitored node 20-7 will be described.

In this case, for example, in the monitoring node 10A, the operator inputs a command from the console 4 to the monitoring mode command unit 12 through the console control unit 11. Then, the monitoring mode determination command unit 12 issues a request to activate the monitoring mode determination protocol 14 by the command input by the operator (step 101a). Then, the monitoring mode determination protocol 14 is activated and the operation is started (step 102).

Next, the monitoring mode determination protocol 14 in the monitoring node 10A transmits a monitoring mode determination start data unit to all the monitored nodes 20 as shown by the thick solid line in FIG. 2 (step 103).

Further, when each monitored node 20 receives the monitoring mode determination start instruction data unit, the monitoring mode determination protocol 24 in each monitored node 20 sends to all monitoring nodes 10 as shown in FIG. Then, the self-monitoring node number is set as the transmission source, the node number of the monitoring node 10 is set as the transmission source, and the monitoring target notification data unit in which the number of relays "0" is set is transmitted.

Each monitored node 20 increments the number of relays by 1 when relaying the monitoring target notification data unit. Monitoring mode determination protocol 14 of each monitoring node 10
Determines whether or not a monitoring target notification data unit has been received from each monitored node 20 (step 10).
4). When there is no reception from all monitored nodes 20, all reception is awaited.

When the monitored object notification data unit is received from all the monitored nodes 20, the monitoring mode determining protocol 14 in each monitoring node 10 determines the node number and the number of relays for each monitored node. The associated list section 18 is created (step 105).

For example, as shown in FIG. 7, each monitoring node 1
The list unit 18 is created for each of 0A0, 10B, and 10C. As a result, each monitoring node can calculate the number of relays between each monitored node and itself. For example, the number of relays between the monitoring node 10A and the monitored node 20-1 is 2.

Here, the minimum number of relays among the number of relays shown in the list is shown by hatching. Monitoring node 1
In 0A, the relay count is 0 for the node number 020, and the relay count is 1 for the node numbers 040 and 060.
In the monitoring node 10B, the relay count is 0 for the node number 030 and 1 is relay for the node numbers 010 and 050. In the monitoring node 10C, the number of relays is 0 for the node number 070, and the number of relays is 1 for the node numbers 080 and 090.

The distance between a certain monitoring node 10 and the monitored node 20 may be equal to the distance between another monitoring node 10 and the monitored node 20. In consideration of such a case, it is preferable to determine in advance which monitoring node 10 should be prioritized based on static information, for example, the size of the node number.
Here, the monitoring node number is given priority in ascending order.

Then, the created list is transmitted and received between the monitoring nodes (step 106), and each monitored node 20 receives the monitoring target notification data unit. Furthermore, the monitoring mode determination unit 15 determines whether or not the number of relays of its own monitored node 20 to the same monitored node 20 is smaller than the number of relays of other monitored nodes 20 (step 107). When the number of times of relaying of itself is larger than the number of times of relaying other than itself, the process proceeds to step 109.

On the other hand, when the number of times of relaying of itself is smaller than the number of times of relaying other than itself, the monitoring mode determining unit 15 determines that the monitored node is responsible for monitoring (step 1
08). That is, as a result of the comparison, the monitoring node 10 having a small number of relays takes charge of the monitored node 20.

Then, it is judged whether or not the processing has been completed for all the nodes on the list (step 109), and when the processing has been completed for all the nodes, the processing for determining the monitoring form is completed. That is, since this comparison work is performed in all the monitoring nodes 10, no contradiction occurs in the entire network.

On the other hand, if the above process is not completed, the process returns to step 107 and the processes of steps 107 and 108 are repeated. By performing such a process, the sharing of monitoring is changed as shown in FIG. Here, the number of relays of the monitored node 20-9 to the monitoring node 10C is 1. Further, the number of relays of the monitored node 20-9 to the monitoring node 10A is 2. That is, the number of relays to the monitoring node 10C is smaller than the number of relays to the monitoring node 10A.

Therefore, the monitored node indicated by the node number 090 is shared by the monitoring node 10C. (2) Operation of the monitored node when the system is down Next, the operation of the monitored node 20 when the system is down will be described. As shown in FIG. 9, it is assumed that the monitored node 20-9 is down. Then, the monitored node monitoring unit 26 in the monitored node 20-2 detects that the monitored node 20-6 is down (step 101).
b).

Then, the monitored node 20-2 notifies the monitored node 1 that the monitored node 20-6 is down.
Notify 0A. On the other hand, the monitored node 20-9 connects the line 1 to the monitored node 20-7 and holds communication.

Further, when the monitored node 20-6 does not recover within the fixed time, the monitoring mode determining protocol 14 in the monitoring node 10A is activated (step 102).
Then, the monitoring form as shown in FIG. 10 is changed by performing the processes of steps 102 to 109.

That is, the monitored node 20-9, which was shared by the monitoring node 10A, is now shared by the monitoring node 10C. (3) Operation of the other monitoring node when the system is down Next, the operation of the other monitoring node when the system is down will be described. First, the monitoring node monitoring units 16 provided in each monitoring node mutually monitor each other.

In the example shown in FIG. 11, the monitoring node 10A
Monitors the monitoring node 10B through the monitored nodes 20-2 and 20-3 (monitoring is indicated by a dotted line portion in the figure).
The monitoring node 10B is a monitored node 20-3, 20-5,
The monitoring node 10C is monitored through 20-7. The monitoring node 10C is a monitored node 20-7, 20-4, 20-.
2 to monitor the monitoring node 10A.

Next, for example, it is assumed that the system of the monitoring node 10B is down (in the figure, the system down is indicated by x). Then, the monitoring node monitoring unit 16 in the monitoring node 10A detects that the system of the monitoring node 10B has gone down (step 101c).

Then, the start form determination protocol 14 in the monitoring node 10A is activated (step 102), and the monitor form determination start data unit is transmitted to all the monitored nodes (step 103).

Then, the processes after step 104 are performed, and the list of the number of relays is exchanged between the monitoring node 10A and the monitoring node 10C in order to finally exclude the monitoring node 10B and perform monitoring.

Here, the number of relays from the monitoring node 10A is 2 for the monitored node 20-1, and the monitored node 2
0-3 and 20-4 are 1. The number of relays from the monitoring node 10C is 3 for the monitored node 20-1, 2 for the monitored node 20-3, and 1 for the monitored node 20-4.

Therefore, the monitored nodes 20-1, 20-
3, 20-4 will be shared by the monitoring node 10A. The monitored node 20-4 is equidistant from the monitoring node 10A and the monitoring node 10C, but in this case, the monitoring node 0A is changed to the monitoring node 10A.
Prioritized over C.

As a result, the monitoring mode shown in FIG.
The monitoring mode is changed to that shown in FIG. As described above, according to the present embodiment, the optimum monitoring form according to the form of the network can be automatically determined, so that the work of designing the network in introducing a large-scale network is simplified.

Further, since the monitoring form is automatically reviewed when the network configuration is added, redesign is unnecessary. Further, even if the network configuration temporarily changes, the monitoring form is automatically changed, so that the optimum monitoring form can be always formed.

In the network, in order to realize more flexible network monitoring, in addition to dynamic network monitoring mode determination, conventional static monitoring mode determination may coexist.

The present invention is not limited to the above embodiment. In the above embodiment, the monitoring node 10 includes the monitoring mode determination command unit 13 and the monitoring node monitoring unit 16. However, for example, the monitoring node 10 does not include the monitoring mode determination command unit 13 but includes the monitoring node monitoring unit 16. You may

In this case, if the inter-monitoring node monitoring unit 16 does not recover the monitored node within a fixed time after the system of the monitored node 20 is down, or if another monitoring node 10 is down, the abnormality is detected. It will be detected and the monitoring form determination protocol 14 will be started. Then, the monitoring mode is changed by performing the processing of step 102 and the subsequent steps of the embodiment.

Further, for example, the monitoring node 10 may be provided with the monitoring mode determination command unit 13 without providing the monitoring node monitoring unit 16. In this case, the monitoring form determination command unit 13 issues an activation request by the command of the operator and activates the monitoring form determination protocol 14. Then, the monitoring mode is changed by performing the processing of step 102 and the subsequent steps of the embodiment.

[0069]

According to the present invention, the optimum monitoring form can be automatically determined according to the form of the network, so that the work of designing the network in introducing a large-scale network is simplified.

Moreover, since the monitoring form is automatically reviewed when the network configuration is added, redesign is not necessary. Further, even if the network configuration temporarily changes, the monitoring form is automatically changed, so that the optimum monitoring form can be always formed.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a configuration diagram when a line is added in the embodiment.

FIG. 3 is a configuration block diagram of a monitoring node.

FIG. 4 is a configuration block diagram of a monitored node.

FIG. 5 is a flowchart showing network monitoring form determination according to the embodiment.

FIG. 6 is a diagram illustrating transmission of a monitoring target notification data unit.

FIG. 7 is a diagram showing a list of relay times.

FIG. 8 is a diagram showing a change in monitoring allocation when a line is added.

FIG. 9 is a configuration diagram when the monitored node system is down.

FIG. 10 is a diagram showing a change in monitoring allocation when the monitored node system is down.

FIG. 11 is a configuration diagram when the monitoring node system is down.

FIG. 12 is a diagram showing a change of monitoring sharing fields when the monitoring node system is down.

FIG. 13 is a configuration diagram of a conventional network monitoring mode.

FIG. 14 is a backup configuration diagram of a conventional network monitoring mode.

[Explanation of symbols]

 1 ... Line 2 ... Console 10A-10C ... Monitoring node 11 ... Console control unit 12, 22 ... Communication protocol control unit 13, 23 ... Monitoring form determination command unit 14, 24 ... Monitoring form determination protocol 15 , 25 ... Monitoring type determination unit 16 Monitoring node monitoring unit 17 Network monitoring unit 26 Monitored node monitoring unit

Claims (4)

[Claims] 1. A plurality of monitoring nodes (10) and a plurality of monitored nodes (20) monitored by the plurality of monitoring nodes (10) through a line (1), each monitored node (20). Comprises a transmitting means (24) for transmitting its own node number to each monitoring node (10), and each of said monitoring nodes (10) is based on its own node number from said transmitting means (24). ) For each monitoring node (10) to each monitored node (20), the relay count calculation means (14) for calculating the number of relays of the monitored node to be relayed, and the same monitored node between the monitoring nodes. A network supervisor, comprising: monitoring mode determining means (15) for comparing the number of relays to a node and determining the monitoring mode so that the monitored node is assigned to the monitoring node having the minimum number of relays. Form determining device. 2. The monitoring node (10) according to claim 1, wherein the number of relays calculation means (14) is provided by inputting a command when the number of lines (1) or monitored nodes (20) increases. A monitoring mode determination command unit (13) to be activated is provided, and the monitoring mode determination means (15) is configured to monitor each of the monitoring nodes based on the number of relays changed as the number of lines (1) or monitored nodes (20) increases. An apparatus for determining a network monitoring form, characterized in that the number of relays to the same monitored node is compared with each other, and the monitoring form is changed so that the monitored node is shared by the monitoring node having the smallest number of relays. 3. The monitored node (20) according to claim 1 or 2, wherein each monitored node (20) detects an abnormality occurring in one of the monitored nodes by mutually monitoring, and the relay number calculation means ( 14) activating the inter-monitored-node monitoring unit (26), wherein the monitoring mode determining means (15) is configured to monitor each of the monitoring nodes based on the number of relays changed due to an abnormality of any of the monitored nodes. An apparatus for determining a network monitoring form, characterized in that the number of relays to the same monitored node is compared with each other, and the monitoring form is changed so that the monitored node is shared by the monitoring node having the smallest number of relays. 4. The monitoring node (10) according to claim 1 or 2, wherein the monitoring nodes (10) mutually monitor each other to detect an abnormality that has occurred in any one of the monitoring nodes and to calculate the number of relay times (14). Monitoring node monitoring unit (16)
The monitoring mode determining means (15) compares the number of relays with respect to the same monitored node among the monitoring nodes based on the number of relays changed due to the abnormality of any one of the monitoring nodes, and relays the relays. A network monitoring mode determining device, characterized in that the monitoring mode is changed so that the monitored node is assigned to the monitoring node having the minimum number of times.