JP3149924B2 - Network monitoring control method and system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a system for monitoring and controlling a network, and more particularly to a configuration of a monitoring system hierarchy, a monitoring system updating method for a route failure, and a system thereof.

[0002]

2. Description of the Related Art Conventionally, in a network monitoring method, a plurality of monitoring devices in a network collect monitoring information of each node under management and concentrate the information on a network monitoring center.

[0003]

The above-described conventional network monitoring and control method is based on a system in which a monitoring device monitors the status of a monitored device. The monitoring accuracy increases as the number of monitored devices increases. drop down. In the conventional method in which a monitoring device directly collects device information from each monitoring device, the number of monitoring devices and the time required for collecting information are proportional,
Monitoring accuracy is significantly reduced. Further, when a line failure occurs in a network employing the above method, monitoring becomes impossible until the line failure is recovered. In addition, measures such as searching for a detour route by broadcast when a line failure occurs can be mentioned. However, implementation of the broadcast will extremely increase the network load at that time.

An object of the present invention is to provide a network monitoring control method and system for collecting a monitoring state in the shortest required time while eliminating the above-mentioned drawbacks, finding a failed node at the time of failure, and changing the route thereof. To provide.

[0005]

A network monitoring and control method according to the present invention comprises a network monitoring device, a monitoring relay node having a monitored node at a lower level, a monitoring lowest node having no monitored node at a lower level, and each of them. A network monitoring control method having a hierarchical monitoring system of a network including a line connecting nodes, wherein each node includes a ranking of a monitoring system in a network of its own node,
Holding the monitoring relationship of the adjacent node to its own node, the connection route name to the adjacent node, and the monitoring status display, periodically collecting the monitoring status of all nodes in the network by polling through the monitoring system, and no response in polling Requesting an adjacent relay node to perform an alternate route detection of a route failure of a corresponding lower node by a detection polling request to a non-responding node; and changing an upper node and a route associated with the alternate route detection;
Performing an update record in the network information storage device of the relevant node due to the change.

A step of changing a route in response to a route failure of a corresponding non-responding node in response to a non-response in polling.

In the step of aggregating by polling, a polling command is sent from a monitoring relay node directly connected to the network monitoring apparatus to a node lower in the ranking of the monitoring system at a predetermined cycle, and a response is received by a polling response command. An embodiment of the present invention is a step of reporting monitoring status information and connection status of the entire network in response to a request from the monitoring device.

[0008] The step of performing a route change in response to the route failure includes identifying a corresponding node by non-arrival of a polling response command, and transmitting a non-response node detection request command describing the node to each adjacent node excluding the monitoring upper ranking. And the monitoring relay node that has received the non-response node detection request command similarly transfers the self-node ID to the adjacent node except for the higher-ranking node in the monitoring ranking, and transmits the response from the non-response node. It is a preferred embodiment of the present invention to include a step of updating the monitoring relay node that first receives the response with the monitoring relay node of the non-responding node when the response is obtained.

Further, the network monitoring system of the present invention provides a network monitoring device, a monitoring relay node having a monitored node at a lower level, a monitoring lowest node having no monitored node at a lower level, and a line connecting the respective nodes. This is a network monitoring and control system that periodically polls the monitoring status information of the lower monitoring nodes to detect route anomalies and updates the network configuration in response to the anomalies. Network monitoring information storage means for recording the monitoring ranking of the adjacent node, the monitoring relationship of the adjacent node to the own node, the connection route name to the adjacent node, and the monitoring state, and the spontaneous polling command to other adjacent monitoring nodes , Polling response command to polling command from adjacent node, spontaneous Transmission means for transmitting a non-response node detection request command, a non-response node detection completion command, a monitoring relay node update request command, etc., for a node that has not responded to the The apparatus includes a receiving unit that receives the commands, and a monitoring command processing unit that analyzes the received commands, edits the corresponding commands, and transfers the edited commands to the transmitting unit.

The transmitting means has an ID storage unit for storing the ID of the own node, a serial number storage unit for assigning and storing a serial number of a command to be transmitted, and a transmitting function for transmitting the command to another node. The receiving means has a receiving function of receiving a command transmitted from another node, a command history storage unit for recording the identifier and time of the received command, and a function of filtering presence / absence of the reception history of the received command. Is a preferred embodiment.

Further, the means for updating the network configuration in response to the route abnormality is configured to edit a non-response node detection request command which describes the non-response node specified by the non-arrival of the polling response command. Means for sending to each adjacent node except the monitoring system high ranking,
The monitoring system relay node that has received the non-response node detection request command similarly transmits the ID of the own node to the received non-response node detection request command toward all adjacent nodes except for the top of the monitoring system ranking and the received route. And when a response from the non-responding node is obtained, the monitoring relay node that first receives the response is used as a monitoring relay node of the non-responding node. It is.

The network monitoring and control system of the present invention considers a network in which a network monitoring device and a node are connected via a communication line. Each node has a network information storage unit, and stores therein network information including parameters relating to a monitoring rank used in monitoring control. In addition, each node can use the NWDB to recognize whether each adjacent node connected to the line belongs to the monitored lower rank node or the monitored upper rank node. (Hereinafter, a node having a monitoring lower rank node and a node having no monitoring lower rank node will be referred to as a monitoring relay node and a monitored node, respectively.) In such a network, the monitoring relay node is an NWD.
In accordance with B, the monitoring lower rank node is polled, the monitoring status information collected by the polling is stored in the NWDB storage unit, and when polling is received from the monitoring device or the monitoring higher rank node, the own node and the monitoring lower rank node are monitored. And a monitoring control method for responding to the monitoring status information.

Further, when a non-response is detected during polling, the node which has detected the non-response first detects a non-response node for the monitoring lower rank node group of the own node. By shifting the detection to a higher rank node, a monitoring route is detected so as not to significantly affect network traffic.

In addition, when a node is added / deleted, node information is changed, a monitoring route is changed, etc., the monitoring route can be dynamically changed by downloading the NWDB from the monitoring device to the node. Also features.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a network diagram showing an entire configuration of an embodiment of a system to which a network monitoring control method of the present invention is applied. This network includes a monitoring device 1, monitoring relay nodes 21 to 23, lowest monitoring nodes 31 to 34, and a group of communication lines (hereinafter referred to as a route) connecting the nodes.

FIG. 2 is a block diagram of a general node 10 which is a component of the present invention. The node 10 includes a transmitting device 5, a receiving device 6, a command processing unit 7 for processing command transmission / reception with another node, and network information (hereinafter NWD).
B).

The transmitting device 5 includes a self-node ID storage unit 51,
It has a serial number storage unit 52 and a transmission unit 53 for transmitting a command to another node. The own node ID storage unit 51 stores the own node ID. The serial number storage unit 52 stores a serial number assigned to each transmission command that is a source of a command identification number described later.

The receiving device 6 includes a command history storage unit 61
And a receiving unit 63 that receives a command transmitted from another node, and a filtering unit 62 that filters the received command. The command history storage unit 61 stores a command reception history (composed of the command identifier of the received command and the received time data) corresponding to the number of commands that can be received within a certain period of time.

The NWDB storage unit 8 stores an NWDB 80 that has a default value determined by a configuration or is updated by a new NWDB notification command described later.

The NWDB 80 has its own node ID information 81,
Route information 82, monitoring type information 83, monitoring status information 84
Consists of The own node ID information 81 stores the own node ID. The route information 82 stores the relationship between the own node and other nodes in the line connection. The monitoring type information 83 stores the monitoring type of each node.
D, the node ID of the monitored lower rank node, and the node monitored by the monitored lower rank node, if any
(Hereinafter, the node ID of the subordinate node of the monitoring lower rank node) can be identified. Monitoring status information 84
Stores the monitoring status information 84 of the own node, the monitoring lower rank node, and the nodes under the monitoring lower rank node.

Next, the operation of the constituent devices included in each node of the network monitoring and control system will be described.

When the transmitting device 5 receives the information on the route for transmitting the command and the transmission command from the command processing unit 7, the transmitting device 5 combines the command identifier of the received transmission command with the own node ID and the serial number so as to be unique in the network. And sends the send command to the specified route. However, when transferring a non-response node detection request command and a new NWDB notification command, which will be described later, the command identifier of the transfer source is used as it is.

When receiving the command, the receiving device 6 checks whether data having the same value as the command identifier of the received command exists in the command history storage unit 61. As a result of the check, if there is no equivalent command identifier, the command identifier and the reception time are stored in the command history storage unit 61 as a command reception history, and the information of the route that received the command and the received command are stored. Deliver to the command processing unit 7. If the result of the check indicates that a command reception history exists in the command history storage unit 61, the received command is discarded.
The receiving device 6 deletes the command history stored in the command history storage unit 61 after a lapse of a predetermined time.

The first processing of the command processing unit 7 is NWD
The route to the monitoring lower rank node in the monitoring type information of the NWDB 80 is checked from the route information of the B80, and the polling command 41 specifying the route is delivered to the transmitting device 5. The polling command 41 stores a command ID, a command identifier, and a node ID (for the number of nodes) of a monitoring target node (monitoring lower rank node and its subordinate nodes). The command ID has a unique value determined in advance for each command.

In the second process of the command processing section 7, when a polling command is received from another node, the command processing section 7 transfers the polling response command 42 to the transmitting device 5 specifying the route from which the polling command was received.

In this case, the polling response command 42
Is composed of a command ID, a command identifier, and monitoring state information 84 (for the node) of the monitoring target node. The monitoring status information 84 of the monitoring target node is configured by combining the node ID and the monitoring status information.

The third process of the command processing section 7 is to receive the polling response command 42 from the polled target node, and change the monitoring status information of the monitoring target node on the received polling response command 42 to the monitoring status information 84 on the NWDB 80. Overwrite to

When there is no expected monitoring status information of the monitoring target node in the monitoring status information of the monitoring target node of the received polling response command 42, the monitoring type information (on the NWDB 8) of the node having no monitoring status information is monitored. From "Yes" to "No Monitoring".

The fourth process of the command processing unit 7 is to transmit the polling command, and if the polling response command 42 is not received within a predetermined time from the same route, the transmitting device 5
Is sent to send a no-response node detection request command 43 specifying all routes other than the route to the monitored higher rank node.

The non-response node detection request command 43 includes a command ID, a command ID, a node ID of a detection request node (non-response node), a node ID of a node that has detected no response, and relay node information. The own node ID is stored in the relay node information.

The fifth process of the command processing section 7 is as follows. After the non-response node detection request command 43 is delivered to the transmitting device 5, if the non-response node detection completion notification command 45 described later is not received within a predetermined time, The monitoring type of the corresponding node on the NWDB 80 and, if it exists, the monitoring lower rank node is changed from “monitoring lower” to “not monitor”, and a route to the monitoring upper rank node is specified for the transmitting device 5. The response node detection request command 43 is delivered so as to be transmitted.

In the sixth process of the command processing section 7, when the non-response node detection request command 43 is received, the node ID of the detection request node stored in the received non-response node detection request command 43 and the self- Compare node IDs.

When the result of the comparison is "not equal", the node ID of the own node is added to the end of the relay node information on the command, and the transmission device 5 is given a route other than the route that received the command, and Then, the non-response node detection request command 43 specifying all the routes to the nodes whose monitoring type in the monitoring type information on the NWDB 80 is other than “monitoring upper rank node” is transferred (transfer of the non-response node detection request command).

When the result of the comparison is "equal", the self-node is the corresponding non-response node, so that the monitoring higher-rank node has been changed, and the node ID of the monitoring higher-rank node in the monitoring type information on the NWDB 80 Is changed to the node ID of the node connected by the route that received the no-response node detection request command. Further, it sends a non-response node detection notification command 44 specifying the route that has received the non-response node detection request command 43 to the transmission device 5.

The non-response node detection notification command includes a command ID, a command identifier, a node ID of a node whose monitoring higher rank node is to be changed, and a relay having the same value as the relay node information in the received non-response node detection request command 43. It consists of node information.

The own node ID is stored in the node ID of the node whose monitoring higher rank node is to be changed.

The seventh process of the command processing section 7 is as follows. When the non-response node detection notification command 44 is received, the NWDB 8
0, the node connected to the route that received the command is its own monitoring lower-rank node, and the transmission device 5 is connected to the monitoring upper-rank node that is connected to the monitoring upper-rank node. Deliver the NWDB update request command that specifies

The NWDB update request command 46 stores a command ID, a command identifier, a node ID of a node whose monitoring upper rank node is to be changed, and a node ID of a new monitoring upper rank node. Further, the command processing unit 7 receives the non-response node detection notification command 44
, Deletes the node ID of the own node at the end of the relay node information, and transmits a non-response node detection completion notification command 45 specifying the route to the last node of the deleted relay node information to the transmitting device 5 Let it.

No-response node detection completion notification command 45
Consists of a command ID, a command identifier, a node ID of a node whose monitoring higher rank node is to be changed, and relay node information. In the node ID of the node whose monitoring upper rank node is to be changed, the node ID of the node whose monitoring upper rank is to be changed stored in the received non-response node detection notification command 44 is stored. In the relay node information,
Stores the node ID of the node at the end deleted from the relay node information of the no-response node detection notification command 44.

The eighth process of the command processing unit 7 is to delete the node ID of the own node at the end of the relay node information stored in the command when the non-response node detection completion notification command 45 is received, If there is relay node information, the same command specifying the route to the last node of the relay node information (no response node detection completion notification command)
To the transmitting device 5. If there is no relay node information after deletion, do nothing.

The ninth process of the command processing unit 7 is NWDB
When receiving the update request command 46, the NWDB 8 of the node to change the monitoring higher rank node on the command
0 is changed to a subordinate of the node to which the received route is connected, and a new monitoring upper rank node that specifies a route to the monitoring upper rank node of the own node to the transmitting device 5. The NWDB update request command 46 in which the node ID of the own node is stored in the node ID of the own node is delivered. The monitoring device directly connected node 21 without the “monitoring upper rank node” information in the monitoring type information 83 of the NWDB 80 is an NW
Only the DB 80 is updated.

The monitoring device 1 can obtain monitoring status information of all nodes in the network by transmitting a polling command designating all nodes to the monitoring device directly connected node 21.

The tenth process of the command processing section 7 is as follows. When the new NWDB notification command 47 is received from the monitoring device 1 or the monitoring upper node, the NWDB of the own node is extracted from the new NWDB information of all nodes, and the NWDB 8 of the own node is extracted.
Then, the same command specifying all routes is transferred to the transmitting device 5. New NWDB notification command 4
7 is a command ID, a command identifier, and N of all nodes.
It consists of new NWDB information consisting of WDB.

Next, the network monitoring control method of the present invention will be described with reference to the operation of one embodiment. FIG. 8 is a flowchart summarizing the basic flow of the network monitoring control method of the present invention.

Polling is started in each node according to an instruction from the network monitoring apparatus 1 (step A1). When all polling response commands are returned in response to the polling command, it indicates a stable state. If there is no response from a certain node, the upper node sends a non-response node detection request storing the non-response node name to the adjacent relay node, and requests a proxy route detection for the non-response node (step A2). When a proxy route to a non-response node is detected, the route is set as an update route of the non-response node,
Disseminate update of network information record (step A
3).

A specific example of the above method will be described with reference to the operation of the embodiment. FIG. 3 is a network diagram showing one embodiment of the present invention. FIG. 3 is a block diagram showing a network configuration according to an embodiment of the present invention, and FIGS.
And FIG. 6 and FIG. 7 are flowcharts showing the operation of the monitoring and control system according to this network monitoring and control method.

The network monitoring device 1 has nodes N2 and N3 whose status is directly monitored by a monitoring relay node N1 (hereinafter, node x is referred to as Nx) directly connected to the monitoring device, and the nodes N2 and N3 whose status is directly monitored by N2. Lower nodes N4, N5, N6,
And a lowest node N7 whose status is directly monitored by the relay node N3, and lines L1 to L8 connecting the nodes.

Each node is shown in FIG.
It is assumed that the NWDB 80 for each node shown in FIG.

At this time, N2 is the NWD shown in FIG.
According to B (b), N which is the monitoring lower rank node of N2
4, N5 and N6 are monitored by the polling command, and the own node and the monitoring lower rank nodes N2, N4, N5,
The monitoring state information of N6 is held in the NWDB80. Upon receiving a polling command from the monitoring higher rank node N1, it responds by adding the held monitoring status information to the polling response command.

Similarly, according to the NWDB shown in FIG. 4 (c), N3 monitors the lowest monitoring node N7, which is the lower monitoring node of the node N3, with a polling command, and monitors the own node and the monitoring lower rank nodes N3, N7. The monitoring state information 84 is held in the NWDB shown in FIG. The monitoring relay node N1, which is the higher rank node, sends a polling command according to an instruction from the network monitoring device 1 (step S1). When the lower node receives the polling command 41, the lower node receives the polling command 41 and sends the held monitoring status information to the polling response. A response is made with the command 42 (step S2).

N1 is in accordance with NWDB of FIG.
2, the polling command 41 is transmitted to N3. Since both N2 and N3 have monitoring lower rank nodes, the nodes ID of the monitoring target nodes of the polling command to N2 include N2, N4, N5, and N6. Node I
D to obtain monitoring state information of N2, N4, N5, and N6. Similarly, the polling command to N3 is transmitted by including the node IDs of N3 and N7 as the node IDs of the nodes to be monitored, and the monitoring status information of N3 and N7 is obtained (steps S3 and S4).

As described above, N1 holds all the monitoring status information of N1 to N7. When N1 receives the polling command from the monitoring device, it responds by adding the held monitoring status information to the polling response command.

The network monitoring device 1 can obtain monitoring status information of all nodes in the network by transmitting a polling command designating all nodes to N1.

Here, it is assumed that a line failure has occurred between N2 and N6.

N2 which cannot receive a polling response command from N6 in response to the polling command within a predetermined time
Transmits the non-response node detection request command 43 to all routes L4, L5, and L6 other than the route to the monitoring upper rank node N1, such as N2 → N3, N4, N5, and N6 (steps S3 and S5).

N6 cannot receive the no-response node detection request command 43 due to a line failure. When N4 and N5 receive the no-response node detection request command 43 (step S1)
0), the own node ID is compared with the node ID (N6) of the detection request node on the received non-response node detection request command 43 (step S11). Attempt to transfer command 43. However, there is no route outside the route to the monitoring upper rank node and there is no route other than the route that has received the no-response node detection request command 43 (step S12).

N3 is a no-response node detection request command 43
Is received (step S10), the own node ID is compared with the node ID (N6) of the detection request node on the received non-response node detection request command 43 (step S1).
1) Since the values do not match, the transfer of the no-response node detection request command 43 is attempted (step S12).

Transfer to routes L7 and L8 other than the route to the monitored higher rank node and routes other than the route L2 that has received the no-response node detection request command 43 (N
3 → N6, N7). When transferring, the own node ID is added to the end of the relay node information of the no-response node detection request command 43. At this point, N2 and N3 have been recorded.

Upon receiving the no-response node detection request command 43 (step S10), the N7 receives the non-response node detection request command 43 in the same way as the above-described N4 and N5. Node ID (N
6) are compared, but since the two values do not match, the non-response node detection request command 43 is transferred. But,
Since there is no route other than the route to the monitoring upper rank node and the route other than the route that has received the no-response node detection request command 43, nothing is performed (steps 11 and 1).
2).

On the other hand, when N6 receives the non-response node detection request command 43, the self-node ID and the detection request node ID N6 on the received non-response node detection request command 43 match, so that the non-response node detection request The node N3 connected to the route receiving the command 43 is updated as its own monitoring upper rank node, and the non-response node detection notification command 44 is transmitted to N3 (step S1).
3).

N3 that has received the no-response node detection notification command 44 (step S14) updates the NWDB 80 so that N6 connected to the route that received the no-response node detection notification command 44 becomes the monitoring lower rank node. NWDB to the route of N1 which is the higher rank node of monitoring
An update request command 46 is transmitted (step S16).
Prior to transmission, N which is the node ID of the node that changes the monitoring higher rank node on the NWDB update request command 46
6 and the node ID of the new monitoring upper rank node N3 are entered.

Also, the node ID N3 of the own node at the end of the relay node information N2 and N3 of the received non-response node detection notification command 44 is deleted, set to N2, and the route to the node N2 at the end again is deleted. Is checked by NWDB,
Non-response node detection completion notification command 4 to the route L3
5 is transmitted (step S15).

N2, which has received the no-response node detection completion notification command 45 transmitted by N3, sets the node ID of its own node at the end of the relay node information stored in the command.
Was deleted and the relay node information disappeared after the deletion.
Do nothing (step S7).

N2, which has received the non-response node detection completion notification command 45, does not transmit the non-response node detection request command 43 to the monitoring higher rank node since it has received the non-response node detection completion notification command 45.

On the other hand, N1 which has received the NWDB update request command 46 transmitted by N3 indicates the monitoring type on the NWDB of the node N6 which changes the monitoring higher rank node in the command, and the node to which the received route is connected. Change to N3.

The monitoring device directly connected node N1 having no information of “monitoring upper rank node” in the monitoring type information of the NWDB is the NWDB.
Will only be updated.

To perform the relevant NWDB updates,
The network monitoring device 1 sends a new N to the required directly connected relay node.
The relay node transmits the WDB notification command, and the relay node transfers the command, whereby each node receiving the new NWDB updates its own NWDB (step S17).

In the embodiment of the present invention, the initial value of the NWDB is statically set by the configuration. As an application of the present invention, there is an example in which a monitoring route can be dynamically changed by performing the same method in a network in which a monitoring device can download an NWDB to a node.

[0069]

As described above, the first effect is that even if the number of monitoring nodes increases, the monitoring efficiency does not decrease in proportion to the number. The reason is that the monitoring relay node holds its own node and the monitoring status under its own node in its NWDB.

The second effect is that even if the number of steps between the monitoring device and the non-response node is large, the non-response node can be quickly changed.
In addition, the network can be accommodated in a monitorable state without giving much load to the network. The reason is that the node that detects no response detects the monitoring route and reconstructs an alternative route.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a network to which a network monitoring control method according to the present invention is applied.

FIG. 2 is a diagram showing an internal configuration of each node shown in FIG.

FIG. 3 is a network configuration diagram of an embodiment of the network monitoring and control system of the present invention.

4 (a) is the NWDB of N1 shown in FIG. 3, (b) is the NWDB of N2, (c) is the NWDB of N3, and (d) is N4 shown in FIG.
(E) shows the NWDB of N5, (f) shows the NWDB of N6, and (g) shows the NWDB of N7.

5A is a polling command, FIG. 5B is a polling response command, FIG. 5C is a non-response node detection request command, FIG. 5D is a non-response node detection notification command, and FIG.
Is a non-response node detection completion command, (f) is an NWDB update request command, and (g) is a new NWDB notification command.

FIG. 6 is a diagram illustrating a polling step of a flowchart of an embodiment of the network monitoring control method of the present invention.

FIG. 7 is a flowchart showing the steps subsequent to FIG. 6 after a no-response node detection request.

FIG. 8 is a basic flowchart of the network monitoring control method of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 network monitoring device 5 transmission device 6 reception device 7 command processing unit 8 NWDB storage unit 21, 22, 23 monitoring relay node 31, 32, 33, 34 monitoring lowest node 41 polling command 42 polling response command 43 no response node detection request Command 44 No response node detection notification command 45 No response node detection completion notification command 46 NWDB update request command 47 New NWDB notification command N1, N2, N3 Monitoring relay nodes N4, N5, N6, N7 Monitoring lowest nodes L1, L2, L3 , L4, L5, L6, L7, L8
Route (line)

Claims (6)

(57) [Claims] 1. A network monitoring control for a network comprising a network monitoring device, a monitoring relay node having a monitored node at a lower level, a monitoring lowest node having no monitored node at a lower level, and a line connecting each of the nodes. A method wherein each node retains and stores a monitoring ranking in the network of the own node, a monitoring relationship of the adjacent node to the own node, a connection route name to the adjacent node, and a monitoring status display; Aggregating the monitoring state of the node by polling, and requesting an adjacent relay node to perform an alternate route detection of a route failure of a corresponding lower node by a detection polling request to a non-responding node in response to a non-response in polling. , Change of upper node and route due to detection of proxy route, Network monitoring control method and a step of updating records in the network information storage device nodes associated by change. 2. The step of aggregating by polling includes sending a polling command from a monitoring relay node directly connected to a network monitoring device to a node lower in the monitoring ranking at a predetermined cycle, receiving a response by a polling response command, and monitoring the network. 2. The network monitoring control method according to claim 1, further comprising the step of reporting monitoring status information and connection status of the entire network in response to a request from the device. 3. The step of performing a route change in response to the route failure includes sending a non-response node detection request command describing a node specified by the non-arrival of a polling response command to each of the adjacent nodes except for the monitoring upper ranking. When the monitoring relay node receiving the no-response node detection request command attaches its own node and transfers it to an adjacent node excluding the higher-ranking node in the monitoring ranking, and obtains a response from the non-response node, the 3. The network monitoring control method according to claim 1, further comprising the step of: setting the monitoring relay node received in (1) as a monitoring relay node of the non-responding node. 4. A network monitoring apparatus, a monitoring relay node having a monitored node at a lower level, a monitoring lowest node having no monitored node at a lower level, and a line connecting each of the nodes, and periodically monitoring the nodes. A network monitoring and control system that polls the monitoring status information of lower nodes to detect route anomalies and updates the network configuration in response to the anomalies. A network monitoring information storage unit in which a monitoring relation to the own node, a connection route name to an adjacent node, and a monitoring state are recorded; a polling command to another adjacent monitoring node;
Transmitting means capable of transmitting at least any one of commands including a polling response command, a non-response node detection request command, a non-response node detection completion command, and a monitoring relay node update request command; A network monitoring control system comprising: a receiving unit that receives each command; and a monitoring command processing unit that analyzes the received command, edits a corresponding command, and transfers the command to a transmitting unit. 5. The transmission means has an ID storage unit for storing an ID of the own node, a serial number storage unit for assigning and storing a serial number of a command to be transmitted, and a transmission function for transmitting a command to another node. A receiving function for receiving a command transmitted from another node, a command history storage unit for recording the identifier and time of the received command, and a filtering function for detecting the presence or absence of a received history of the received command. The network monitoring and control system according to claim 4, comprising: 6. A means for updating a network configuration in response to the route abnormality by editing a non-response node detection request command which describes a non-response node identified by non-arrival of a polling response command. Means for sending to the adjacent nodes excluding the monitoring system high ranking, and the monitoring system relay node receiving the non-response node detection request command is directed to all the adjacent nodes except for the route having received the monitoring system high ranking and the received route. Transferring the received non-response node detection request command with the ID of the own node, and when a response from the non-response node is obtained, the monitoring relay node that first receives the response monitors the non-response node. 6. The network monitoring and control system according to claim 4, further comprising a relay node.