JP3197946B2 - Operation management method of loop network - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the operation of a loop network in which a network management device collects the operation status of each node and manages the transmission of control commands to each node in a loop network such as a LAN. Improvement of management method.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram of a conventional loop type network, and FIG. 7 is a diagram showing a flow of processing for collecting control commands and operation state information in FIG.

[0003] In FIG. 6, the nodes 1 ′ to 5 ′ and the master node 30 of the network management device 52
0, are connected in a loop by the standby transmission line 91, use the active transmission line 90 when normal, use the standby transmission line 91 when the active transmission line 90 is abnormal, and enable the node to perform reception relay. When there is no abnormality, loop back is performed by a control command from the network management device 52.

The master node 30 has a master node 3
A network service processor (hereinafter, referred to as NSP) 31 for taking in the operation state information of each of the nodes 1 'to 5' collected by polling and transmitting a control command, and a spare NSP 32 are connected.
The operation status of the nodes 1 'to 5' is displayed on the display device 40, and an alarm is issued when any of the nodes 1 'to 5' is abnormal.

[0005] When the NSP 31 sends a control command for causing the node 5 ′ to perform, for example, loopback or time setting to the master node 30, the master node 30 uses the active transmission line 90 as shown in FIG. Then, this is relay-transmitted, and the nodes 1 'to 4' also relay-transmit using the active transmission line 90 and send it to the node 5 '.

The node 5 'receiving this control command returns a response signal using the active transmission line 90.
As shown in (A), when the nodes 4 ′ to 1 ′ relay and transmit using the active transmission line 90 and reach the master node 30, the master node 30 relays and transmits to the NSP 31.

The operation status of each of the nodes 1 'to 5' is
7, when the master node 30 first sends a polling signal to the node 1 ′ to the active transmission line 90 as shown in FIG. , An abnormal state, and operation state information indicating the operation state according to the control command are returned to the master node 30. When the operation state information is returned, the master node 30 returns to the state shown in FIG.
When a signal for polling the node 2 ′ is sent to the working transmission line 90, this signal is relayed and transmitted by the node 1 ′ and sent to the node 2 ′. When the operation status information indicating the operation status according to the control command is returned, this information is transmitted to the node 1 '.
And relayed back to the master node 30.

As described above, when a polling signal is sent from the master node 30 to the working transmission line 90 in the order of the nodes 3 ', 4', and 5 ', as shown in FIG. Relayed to reach nodes 3 ', 4', 5 ',
When the operation status information of the own node is returned from the nodes 3 ′, 4 ′, 5 ′ to the working transmission line 90, it is relayed and transmitted by a node in the middle to reach the master node 30, and the master node 30 receives the nodes 1 ′ to 5 ′. Is recorded in the memory.

[0009] Then, the NSP 31
To send back the operating state information of each of the nodes 1 'to 5', display them on the display device 40, and output an alarm if there is abnormal information to notify the administrator.

[0010] If the polled node is abnormal and does not return operation status information after a certain period of time, the master node 30 records this node as abnormal in the memory.

[0011]

However, in the conventional loop network operation management method, since a single transmission line is used to transmit control commands via the master node 30, it is farther than half of all nodes. Node 4 ',
5 'has a problem that transmission is slow, and the master node 30'
Since the operation status information of all nodes is collected by polling sequentially using one transmission line, it takes time to collect the operation status information. If a response cannot be made due to a node error, a predetermined time is waited. It is determined that there is an abnormality, and next, there is a problem that it takes more time to collect data because polling is performed on the subsequent nodes in the reverse direction using the backup transmission line 91.
When the master node 30 to which P31 is connected is abnormal, transmission of control commands and collection of operation state information cannot be performed.

According to the present invention, a control command can be transmitted quickly to a node farther than half of all nodes, the operation status information of all nodes can be collected quickly, and a control command can be transmitted even if a node connected to a network management device is abnormal. Another object of the present invention is to provide a loop-type network operation management method capable of collecting operation state information.

[0013]

FIG. 1 is a block diagram showing the principle of the present invention. As shown in FIG. 1, a plurality of nodes (1 to
5) is a loop type network connected in a loop by a clockwise transmission line 60 and a counterclockwise transmission line 61, respectively. In the loop type network, the network management device collects the operation state of each node and controls commands to each of the nodes 1 to 5. When performing the operation management of transmission, each of the nodes 1 to 5 is provided with operation state information indicating the normal / abnormal state and the operation state of its own node with a fixed number of source node numbers and all node numbers as destinations. When the operation status information is received within a predetermined time period, it is transmitted to the clockwise transmission line 60 and the counterclockwise transmission line 61, and is written into the operation status accumulation file 71, and is relayed and transmitted in the received direction. If the status information is not received after a predetermined time, the node transmitting the operation status information is written as abnormal in the operation status storage file 71, and a control command is transmitted to the network. When it is received from a physical device, it is fetched when it is addressed to its own node, when it is addressed to another node, it is transmitted to the clockwise transmission line 60 and counterclockwise transmission line 61, and when it receives a control command from an adjacent node, it is addressed to its own node. At the time of capture,
In the case of a destination addressed to another node, a transmission / reception means 70 for relay transmission in the receiving direction is provided, and a plurality of network management devices 5 are provided.
0, 51 are connected to separate nodes 1 and 3, respectively. Operation status information is fetched from the connected nodes 1 and 3, and when a control command is transmitted, a control with a source network management device number and a destination node number is added. A command is transmitted to the connected nodes 1 and 3.

[0014]

According to the present invention, control commands for each node are sent from the clockwise transmission line 60 and the counterclockwise transmission line 61, so that the transmission time to nodes farther than half is shorter than before. The operation status information of the own node is stored in each node 1
5 through the clockwise transmission line 60 and the counterclockwise transmission line 61, and the nodes 1 to 5 receive this and store the operation state information of each node 1 to 5 in the operation state accumulation file 71. Since the collection of the operation status information is quicker, the operation status information of each of the nodes 1 to 5 is stored in the operation status accumulation file 71 at each node, and the relay of the control command to each node can be performed. Regardless of which node the network management device is connected to, collection of the operation status of each node and operation management of transmission of control commands to each of the nodes 1 to 5 can be performed quickly.

For example, if the network management devices 50 and 51 are connected to the nodes 1 and 3 to transmit control commands and collect operation status information, for example,
Even if node 1 connecting 0 becomes abnormal, node 3
The network management device 51 can transmit a control command and collect the operation status of each node via, and can perform network operation management.

[0016]

FIG. 2 is a block diagram of a loop type network according to an embodiment of the present invention, FIG. 3 is a format of management information according to the embodiment of the present invention, and FIG. FIG. 5 is a block diagram showing operation state information processing according to the embodiment of the present invention.

In FIG. 2, the nodes 1 to 5 are connected in a loop by a clockwise transmission line 60 and a counterclockwise transmission line 61. For example, the node 1 has a network management device 5 provided in an operation room.
0, and a network management device 51 provided in the shift room is connected to the node 3 (this connection may be at any node and the number of network management devices may be two or more). The NSPs 33 and 34 transmit control commands and collect the operation status of each node,
The operation status of each node can be displayed on the display devices 41 and 42.

FIG. 3 shows the format of the control information output from the NSPs 33 and 34 and the management information of the operation state information output from each of the nodes 1 to 5 indicating the normal / abnormal state of the own node and the operation state according to the control command. In addition to the information, a source node number writing area, a destination node number (in the case of operation status information, all nodes) writing area, and a time stamp area for writing a time when the data is transmitted are written in these areas. Is to be sent.

The operation of each node will be described with reference to FIG. 4 and FIG. When the control command having the format shown in FIG. 3 sent from the NSP 33 is transmitted, as shown in FIG. 4A, the transmission processing program 80 transmits the control command to the node 2 on the right via the clockwise transmission line 60. The signal is transmitted to the node 5 on the left side via the left-hand transmission line 61.

When the control command is relayed, the control command is transmitted from the clockwise transmission line 60 and the counterclockwise transmission line 61 and relayed. In FIG. 4B, the control command is input from the clockwise transmission line 60, and This shows a case where the control command of the same time stamp is input earlier than the control command input from the counterclockwise transmission line 61, and is received by the reception processing program 81, and the destination node number and the time stamp of the format are checked. Since the time stamp control command has not been input, the transmission processing program 80 sends the control command to the node 2 via the clockwise transmission line 60 in the direction of the transmission, and transmits the time stamp transmitted from the counterclockwise transmission line 61 to the node 2. When the control program of the stamp is received by the reception processing program 81, the control command of the time stamp is already received. To.

Next, the receiving process will be described. FIG. 4 (C)
As shown in (1), when a control command is sent from the nodes 5 and 2 via the clockwise transmission line 60 and the counterclockwise transmission line 61, it is received by the reception processing program 81, and the destination node number and the time stamp of the format are set. At first, the first-arriving one is received, and the second-arriving one is discarded and sent to the processing program 82 for the own node.

Next, the operation state information processing will be described with reference to FIG. As shown in FIG. 5A, the node 1 uses the operation state collection program 83 to execute the operation state according to the control command,
The operation status information in which the normal and abnormal states of hardware and software are collected is set to the destination node number in the format shown in FIG. 3 as all nodes, the time to be transmitted is written in the time stamp area, and the transmission processing program 80 turns clockwise at a constant period. Transmission line 60
To the node 2 via the counterclockwise transmission path 61.

Next, the case of relay reception will be described with reference to FIG. The operation processing information in the format shown in FIG. 3 sent from the clockwise transmission line 60 and the counterclockwise transmission line 61 is received by the reception processing program 81, and FIG. In addition, this shows a case where the operation status information is input earlier than the same time stamp input from the counterclockwise transmission line 61, and is received by the reception processing program 81, and the destination node number and the time stamp of the format are viewed. Since the time stamp control command has not been input, the time stamp control command is sent to the processing program 82 and stored in the operation state storage file 71. 60, and transmits the operation status information of the time stamp sent from the counterclockwise transmission line 61 to the reception processing program. 81 when received in the,
Since the operation status information of this time stamp has already been received, it is discarded.

The operation state information of the node 1 is collected in the own node and stored in the operation state storage file 71. In this way, all the nodes 1 to 5 can accumulate the operation status information of all the nodes in the operation status accumulation file 71, and all the nodes 1 to 5 can relay the control command. No matter which node you connect to,
Operation management can be performed.

When the operation status information cannot be transmitted due to a node failure, each node is not transmitted even after waiting for a predetermined time, so that this node is recognized as abnormal and the corresponding node column of the operation status accumulation file 71 is abnormal. Accumulate as

Therefore, the network management devices 50 and 51
NSPs 33 and 34 poll the nodes 1 and 3 to collect operation state information of each node, display the information on the display devices 41 and 42, and output an alarm if there is an abnormal node to notify the administrator.

[0027]

As described above in detail, according to the present invention, a control command can be transmitted to a node farther than half faster, control operation can be accelerated, and operation status information collection of all nodes can be accelerated. Even if the connected node is abnormal, it is possible to transmit a control command and collect operation state information of all nodes.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle of the present invention;

FIG. 2 is a block diagram of a loop network according to an embodiment of the present invention;

FIG. 3 is a format of management information according to the embodiment of the present invention;

FIG. 4 is a block diagram showing control command processing of a node according to the embodiment of the present invention;

FIG. 5 is a block diagram showing operation state information processing according to the embodiment of the present invention;

FIG. 6 is a block diagram of a conventional loop network.

FIG. 7 is a diagram showing a flow of a process of collecting control commands and operation state information of FIG. 6;

[Explanation of symbols]

1 to 5, 1 'to 5' are nodes, 31 to 34 are network service processors, 40 to 42 are display devices, 50,
51 and 52 are network management devices, 60 is a clockwise transmission line, 61 is a counterclockwise transmission line, 70 is a transmission / reception means, 80 is a transmission processing program, 81 is a reception processing program, 82 is a processing program, 90 is an active transmission line, Reference numeral 91 denotes a spare transmission path.

Continuation of front page (72) Inventor Masashi Hirome 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-63-193632 (JP, A) JP-A-59-92650 (JP) JP-A-4-20144 (JP, A) JP-A-4-150238 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 12/437

Claims (1)

(57) [Claims] 1. A transmission direction for clockwise and counterclockwise transmission of a plurality of nodes.
Loop network connected in a loop by the
Network, the network management device connected to the nodes
That collects operational status information and controls each node.
With regard to the operation management method of the network, each node stores an operation state
Product file, its own node number as the source node number, and all node numbers
Attached as the destination number, indicating the normal or abnormal status of the own node
The operation status information is transmitted at regular intervals to the clockwise transmission path and counterclockwise.
Transmitting means for simultaneously transmitting the operation status information to the transmission path.
When received from another node within the time, the clockwise and counterclockwise
Out of the information of the same time stamp,
In addition to writing to the operation status accumulation file at the node location,
Means for relaying the received signal to the transmission line in the same direction
It has the 該運for status information, prior to the the reception time a predetermined time other Bruno
If no other node is received, the other node is judged to be abnormal.
Corresponding to the position of the other node in the operation status accumulation file.
The abnormal state is written to the state table, and the control command is transmitted to the network via the adjacent node.
When it is received from the management device or addressed to its own node, this control
When a command is fetched and addressed to another node,
Transmission / reception means for relaying data to the same transmission line
And multiple network management devices are connected to separate nodes.
And the plurality of network management devices are
The operation status information stored in the operation status accumulation file
And the plurality of network management devices transmit a control command.
Source network management device number and destination node
Via the connection node.
A loop-type network operation management method characterized in that transmission is performed simultaneously on clockwise and counterclockwise transmission lines.
Law.