JPH04326640A - Hierarchical LAN management method - Google Patents

Abstract

PURPOSE:To improve the reliability and the efficiency by sharing the load in a LAN management function with a management equipment and a master node. CONSTITUTION:A management equipment 1 sends a master health check (MHC) periodically to a master node 2 through a transmission line 6 and when the node 2 receives the MHC, the state information of the master node and a slave node latched in the master node is sent to the equipment 1 by MHC reply. Moreover, the node 2 sends a slave health (SHC) periodically to nodes 3-5 through a transmission line 7 to monitor the state of the slave nodes 3-5 and when the nodes 3-5 receive the SHC, they send the respective state to the node 2. The state information of the nodes 3-5 obtained by the node 2 is sent to the equipment 1 to manage the entire LAN. Thus, in the LAN handling information of high speed and large capacity, the central operation management by the management equipment is attained, the load of the master node is relieved to improve the reliability and the efficiency.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local area network (LAN) management system.

0002

[Prior Art] In the conventional technology, the master node had all the management functions, so the load on the master node was large in a LAN that transmitted high-speed, large-capacity information.
Furthermore, if a failure occurs in the master node, there is a possibility that the entire LAN will stop functioning. For example, application code related to this type of LAN management method is
There is a Token Ring LAN configuration management method disclosed in Japanese Unexamined Patent Application Publication No. 2-202743.

0003

[Problem to be solved by the invention] The above-mentioned prior art is a LAN
There was a lack of consideration for the functions of the master node, and the master node had all the management functions for the entire LAN, which increased the load on the master node in a LAN that handled high-speed, large-capacity information.

[0004] Furthermore, if a failure occurs in the LAN management function of the master node, there is a possibility that the entire system will be stopped.

SUMMARY OF THE INVENTION An object of the present invention is to provide a RAS function that reduces the load on a master node in a LAN and prevents the entire system from stopping due to a failure in the LAN management function.

[0006]

[Means for Solving the Problem] In order to achieve the above object, in this patent, a management device having a LAN management function is installed separately from the master node, and the management device is connected to the LAN for the master node. The master node has a function to perform a master health check to inquire about the status of a slave node, and the master node has a function to perform a master health check to inquire about the status of a slave node to all slave nodes. Furthermore, when a status change occurs in a slave node, it responds to the slave health check with a request to suck up the status information of the slave node, and The master node uses a hierarchical LAN management system that has the function of monitoring the entire LAN through two-step polling, in which the status of slave nodes whose status has changed is reported to the management device in response to the master health check. This is what I did.

[0007]

[Operation] In order to achieve the purpose of the present invention, most of the functions of the master node as a management device in the LAN, which have conventionally been possessed, are separated from the functions of the master node and made independent as a management device. , the entire system does not stop functioning due to a management device failure, and the master node
In addition to reducing the load on the master node, since the master node does not have the function of a management device, the structure of the master node itself is simplified compared to the conventional master node structure, improving system reliability. It is possible to improve the

[0008]

[Embodiments] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a LAN connection diagram, and 1 is a LAN connection diagram.
2 is a master node having a function of inquiring the status of all slave nodes connected to the LAN; 3;
4 and 5 are slave nodes that have a status monitoring function within the slave nodes, and the management device 1 and master node 2 constitute a LAN with the transmission path 6, and the master node 2 and Slave nodes 3, 4, and 5 form a LAN with 7 transmission lines, and the two LANs are connected via master node 2 to form one network and realize data transfer. do.

FIG. 2 is a configuration diagram of the management device, where 8 is an all-node management mechanism that manages all nodes connected to the network, and 9 is an all-node management mechanism that manages all nodes connected to the LAN. The all-node status monitoring mechanism 10 monitors the status of the master node 2 and the statuses of slave nodes 3, 4, and 5 connected via the master node 2. MHC transmission mechanism 11 has the function of periodically transmitting master health checks (MHC) to master node 2; This is a node status receiving mechanism.

The operation of each mechanism within the management device will be explained below.

The all-nodes management mechanism 8 notifies the all-nodes status monitoring mechanism 9 of a node status monitoring command to manage the status of the nodes, and the all-nodes status monitoring mechanism 9 Upon receiving the monitoring command, the MHC transmitting mechanism 10 periodically notifies the master node 2 of an MHC transmitting instruction, and the MHC transmitting mechanism 1
0 periodically transmits MHC to the master node 2 via the transmission path control mechanism 12 upon receiving an MHC transmission instruction.
The all-node status receiving mechanism 11 receives the MHC response containing node status information transmitted via the transmission path control mechanism 12, and transmits the received node status information to all nodes. Notify the status monitoring mechanism 9. All node status monitoring mechanism 9
It determines whether the node status is normal or abnormal, and if it is normal, there is no abnormality, and if there is an abnormality, the detailed information of the abnormal node is notified to the all node management mechanism 8, and all nodes are managed. The mechanism 8 has a function of converting the sent node status information into characters, and here converts it into characters and provides the node status information to the user.

FIG. 3 is a block diagram of the master node, where 13 is a master node control function that manages all functions in the master node 2, and 14 is a self-control function that monitors the status of its own node (master node). A node status monitoring mechanism 15 is an MHC sent by the management device 1 to monitor the status of the master node 2.
The MHC reception mechanism 16 has the function of receiving the MH
17 is a slave node status monitoring mechanism that has a function to monitor the status of slave nodes 3, 4, and 5; 18 is a thread - A slave node that has the function of receiving a slave health check (SHC) response sent from a slave node in order for the master node 2 to recognize the status of the slave nodes 3, 4, and 5. The status receiving mechanism 19 is an SHC transmitting mechanism that has a function of transmitting SHC to the slave nodes 3, 4, and 5 in order to monitor the status of the slave nodes 3, 4, and 5. Data is transmitted and received via transmission line control mechanisms 20 and 21.

The operation of each mechanism within the master node will be explained below.

When the MHC receiving mechanism 15 receives the MHC transmitted from the management device 1 via the transmission path control mechanism 20, the MHC receiving mechanism 15 informs the own node status monitoring mechanism 1 that the MHC has been received.
4, the self-node status monitoring mechanism 14 determines whether the master node 2 is normal or abnormal, and notifies the master node control mechanism 13 of the information. Upon receiving the notification from the own node status monitoring mechanism 14, the master node control mechanism 13 determines whether the status is normal or not.
Regardless of the abnormality, the own node status monitoring mechanism 14 notifies the MHC response sending command to the own node status monitoring mechanism 14, and the own node status monitoring mechanism 14 notifies the master node status transmitting mechanism 16 of the MHC response sending command. The MHC response is sent to the management device via the control mechanism 20.

[0016] Also, the master node 2 is connected to the slave node 3.
, 4, and 5 status monitoring functions, the master node
The slave node status monitoring mechanism 13 notifies the slave node status monitoring mechanism 17 of a slave node status monitoring command, and upon receiving the notification, the slave node status monitoring mechanism 17 issues an SHC transmission command to the SHC transmission mechanism 19. Upon receiving the notification of the SHC transmission command, the SHC transmission mechanism 19 transmits the transmission path control mechanism 21.
SHC is sent to slave nodes 3, 4, and 5 via.

When the slave node status receiving mechanism 18 receives the SHC response containing the status information of the slave nodes 3, 4, and 5 via the transmission path control mechanism 21, the slave node status receiving mechanism 18 transmits the information to the slave nodes. - Notify the slave node status monitoring mechanism 17.
The node status monitoring mechanism 17 notifies the master node control mechanism 13 of slave node status information.

The master node control mechanism 13 is a slave node.
By notifying the status information of the node to the own node status monitoring mechanism 14, and having received the notification, the own node status monitoring mechanism 14 transmits the status information of the slave nodes 3, 4, and 5 to the MHC response. , sends the status information of the slave nodes 3, 4, and 5 to the management device 1.

FIG. 4 is a diagram showing the configuration of the slave node.
is a slave node that manages the functions of slave nodes 3, 4, and 5.
23 is a self-node status monitoring mechanism that has a function of monitoring the status of slave nodes; 24 is a management device 1 that monitors the status of slave nodes 3, 4, and 5; The SHC receiving mechanism 25 has a function of receiving SHC sent periodically from the master node 2 in order to transmit the status of the slave nodes 3, 4, and 5 to the master node 2 by SHC responses. This is a slave node status transmission mechanism with a transmission function, and all data is transmitted and received via 26 transmission line control mechanisms.

The operation of each mechanism within the slave node will be explained below.

[0021] When the SHC receiving mechanism 24 receives the SHC transmitted from the master node via the transmission line control mechanism 26, it notifies the own node status monitoring mechanism 23 that the SHC has been received. The board status monitoring mechanism 23 determines whether the slave node is normal or abnormal, and transmits this information to the slave node.
The code control mechanism 22 is notified. Slave node control mechanism 2
Upon receiving the notification from the own node status monitoring mechanism 23, the node 2 notifies the own node status transmitting mechanism 23 of a slave health check response transmission command regardless of whether it is normal or abnormal, and the own node status monitoring mechanism 2 sends SHC to the slave node status transmitting mechanism 25.
By notifying the response transmission command, the transmission path control mechanism 2
A slave health check response is sent to the master node 2 via 6.

The operation of this configuration will be explained below.

[0023] The management device 1 provides LA to the master node 2.
It has a function to inquire about the status of each node connected to the master node 2, and periodically transmits MHC to the master node 2 via the transmission path 6 using the 10 MHC transmission mechanisms.
The SHC transmission mechanism 19 periodically transmits the SHC for monitoring the status of each slave node to all slave nodes via the transmission line 7.

[0024] When a state change, failure occurrence, or failure recovery occurs in a slave node, the 23 SHC reception mechanisms
Upon receiving C, the slave node status transmitting mechanism 24 sends an SHC response to the master node 2 via the transmission path 7, requesting to download the status information of the slave nodes 3, 4, and 5. The master node 2 receives the slave node 3 according to the SHC response received by the 19 slave node status receiving mechanisms.
4 and 5 state change information is added to the MHC response, and 16
It is transmitted to the management device via the transmission line 6 by the master node status transmission mechanism.

FIG. 5 is a sequence diagram showing the operation flow of this method. The management device 1, which has the function of monitoring the status of all nodes connected to the LAN, regularly sends messages to the master node 2. When the master node 2 receives the MHC, the master node 2 transmits the state information of the master node and slave nodes held by the master node to the management device by an MHC response. To monitor the status of slave nodes 3, 4, and 5, periodically perform SHC on slave node 3.
, 4, 5, and slave nodes 3, 4, 5 send SHC
When received, the status of slave nodes 3, 4, and 5 is
The response is sent to the master node 2. Slave nodes 3, 4, 5 obtained by master node 2 by SHC response
The status information is included in the MHC response and sent to the management device 1, and the management device 1 uses the above two-step polling to
Performs overall management of N.

[0026]

[Effects of the Invention] According to the present invention, in a LAN that handles high-speed, large-capacity information, centralized operation and management by a management device is possible, and since the master node does not have the function of a management device, This has the effect of not being burdensome.

[0027] Furthermore, when the management device stops functioning due to some kind of failure, data exchange on the transmission path between the master node and slave nodes can continue as usual, and the system This has the effect of avoiding an overall outage.

[Brief explanation of drawings]

Figure 1 is a LAN connection diagram showing the connection relationships in the entire LAN, Figure 2 is a configuration diagram of the management device to explain the operation of each mechanism in the management device, and Figure 3 is a diagram to explain the operation of each mechanism in the master node. Figure 4 is a master node configuration diagram for explaining the operation of each mechanism within the slave node.
Figure 5 is an operation chart showing the flow of operation of this method.
This is a cans diagram.

[Explanation of symbols]

1: Management device 2: Master node 3: Slave node 4: Slave node 5: Slave node 6: Transmission line 7: Transmission line 8: All node management mechanism 9: All nodes - Node status monitoring mechanism 10: MHC transmitting mechanism 11: All node status receiving mechanism 12: Transmission path control mechanism (in the management device) 13
: Master node control mechanism 14 : Own node status monitoring mechanism (master node
(inside the code) 15: MHC reception mechanism 16: Master node status transmission mechanism 17:
Slave node status monitoring mechanism 18: Slave node status receiving mechanism 19: SHC transmitting mechanism 20: Transmission path control mechanism (in master node)
21: Transmission line control mechanism (in master node)
22: Slave node control mechanism 23:
Own node status monitoring mechanism (in slave node) 24: SHC receiving mechanism

Claims (1)

[Claims] Claim 1: One management device and a plurality of switching centers (
In a local area network (LAN) in which nodes (nodes) are interconnected for communication, the management device is connected to the LAN.
At least one of the plurality of nodes is a master node that manages the other plurality of nodes (slave nodes), and the management device includes: The master node has a function that periodically performs polling (master health check) to inquire about the status of each node connected to the LAN, and the master node performs polling (master health check) to inquire about the status of each node connected to the LAN. It has a function that periodically performs polling (slave health check) to inquire about the status of each slave node, and each slave node checks when the status changes or a failure occurs. At the time of failure recovery, the master node responds to the slave health check with a request to suck up the state information of its own node, and the master node receives the state of the slave node whose state has changed from the management device. A hierarchical LAN management method characterized by responding to a master health check.