JP3625710B2 - Network management system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a network management system, and is suitable for application to a case where a backbone network is managed through a redundant network management path using, for example, CMIP (Common Management Information Protocol).
[0002]
[Prior art]
Generally, in a transmission line network management system having a manager (management system) / agent (managed system) relationship, a network management path exists between the manager and the agent. The network management path is a logical communication path that connects the manager and the agent.
[0003]
In the case of a transmission line network management system in which one manager and one agent are directly connected via one network management path, only one transmission line can physically exist. When a failure occurs in a transmission path for which a path is set, the manager and the agent are connected by waiting for the failure of the transmission path to be recovered and setting a path in the transmission path again.
[0004]
Therefore, the connection software for connecting the manager and the agent is configured as independent from the manager and the agent, and simply has a function of logically connecting the manager and the agent.
[0005]
In the connection process, the manager simply designates the target agent uniquely, and the connection software receiving it only connects the manager to the agent. The connection software is independent of the manager and does not have a function of notifying the manager of the specific connection path. The manager is only provided with the result of processing in the connection software called connection.
[0006]
[Problems to be solved by the invention]
However, among transmission line network management systems, there is a system in which a manager and an agent are connected via a transmission line itself to be managed. The connection software of such a management system sets two physically different network management paths between the manager and the agent by accessing from the path via either the left or right end of the transmission path. It is possible.
[0007]
That is, the connection by the connection software can be performed not only by one network management path but also by using another path (redundant network management path).
[0008]
The routing of the connection software for connecting the communication path between the manager and the agent having a redundant network management path includes static routing and dynamic routing.
[0009]
In static routing, a route is manually set between a manager and an agent based on static route information prepared in advance.
[0010]
On the other hand, in dynamic routing, a route information change communication procedure (routing protocol) that dynamically changes route information according to network failure information or the like is used. Based on the route information dynamically changed according to this routing protocol, the route setting is performed by the connection software, and the manager and the agent are connected. Similar to the connection software, the routing protocol functions independently of the manager and the agent.
[0011]
In the case of the latter dynamic routing, even if a failure occurs in one route that has set a network management path at a certain point in time, the connection software or routing protocol automatically selects another route and It is possible to continue normal communication between agents.
[0012]
Normally, the normality of communication is ensured in this way, but it is also possible that a failure will occur in a new route after that, so restore the route where the failure occurred as soon as possible, It needs to be normalized.
[0013]
However, since the operator (maintenance / inspection worker) who operates the manager cannot recognize which route the failure has occurred, it immediately determines which route the recovery operation should be performed on. There is a disadvantage that you can not.
[0014]
On the other hand, in the case of the former static routing, the operator manually rewrites the route information when a failure occurs. Therefore, not only to recognize which route the failure recovery operation should be performed on, but also when a failure occurs. In order to resume normal communication between the manager and the agent later, it is necessary to specify the path on which the failure has occurred.
[0015]
That is, in the static routing, if the failure path is delayed, the restart of communication between the manager and the agent is delayed, and management cannot be performed during that period. For this reason, in the case of static routing, the specific urgency of the failure path is generally considered to be higher than that of dynamic routing.
[0016]
It should be noted that the operator should be able to easily recognize which route is used for communication between the manager and the agent, not only in the case of the failure described above, but also in other maintenance inspections. In addition, the case where it is necessary to collect information on the operation state of the transmission path network management system is considered to be widely applicable.
[0017]
[Means for Solving the Problems]
In order to solve such a problem, in the present invention, a system agent arranged for each management target, a system manager for managing the management target via the system agent, and the system manager for communicating with the system agent In a network management system comprising a plurality of management communication paths physically provided, among the plurality of management communication paths provided for the system manager, functioning independently from the system agent and system manager, A connection processing means for connecting the system manager and the system agent through one selected management communication path, and a communication path notification means for notifying the system manager of path information related to the management communication path selected by the connection processing means. And with It is characterized in.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
(A) Embodiment
The embodiment will be described with reference to an example in which the network management system according to the present invention is applied to a transmission line network management system that performs dynamic routing.
[0019]
(A-1) Configuration of the embodiment
The configuration of the transmission line network management system 10 of this embodiment is shown in FIG.
[0020]
In FIG. 1, a transmission line network management system 10 includes a transmission line network 15 to be managed, and a management network (that is, a management network) 16 that executes the management.
[0021]
The illustrated transmission line network 15 can be regarded as a larger original transmission line network (not shown) cut out at any two cut planes P1 and P2. Therefore, the topology of the original transmission line network can be any shape such as a ring shape or a bus shape.
[0022]
Of course, it is natural that the transmission line network 15 may have a configuration as shown in FIG. 1 as a whole.
[0023]
In any case, the transmission line network 15 includes communication devices 12 to 14 and a transmission line 17 that connects them. The communication devices 12 to 14 may be any communication device such as an exchange, a multiplexing device, a router, a hub, a switch, or a MAU (medium access unit).
[0024]
Of the communication devices 12 to 14, the communication device 12 is equipped with the agent 11 in a form that is incorporated in, for example, a memory or ROM incorporated in the communication device 12. The agent 11 is software for managing the communication device 12 to be managed (managed object), and the manager A described later acquires and collects information about the managed object through the agent 11. Therefore, the agent 11 has a function of notifying the manager A of the information according to a predetermined protocol.
[0025]
For example, CMIP (Common Management Information Protocol) can be used as the protocol.
[0026]
In this embodiment, it is assumed that the other communication devices 13 and 14 are also equipped with agents 18 and 19 that manage themselves. However, since the management target is abstracted, one communication device does not necessarily need to be one management target. One agent targets a plurality of communication devices, or a plurality of agents specify one communication device as a management target. It is also possible to do.
[0027]
Note that the types of information acquired by the agents 11, 18, and 19 include, for example, hardware configuration information, software configuration information, various setting information, information on operating conditions, information on fault locations, and the like regarding each management target. obtain.
[0028]
On the other hand, the management network 16 includes a manager A (21) and a manager B (22), and network interface proxy connection units 100A and 100B added thereto. That is, the manager A and the proxy connection unit 100A are mounted on one communication device, and the manager B and the proxy connection unit 100B are mounted on another communication device.
[0029]
If the transmission line network 15 is a backbone network, the management network 16 may be a single LAN.
[0030]
The manager A is software that manages the management target 12 via the agent 11 as described above, and is connected to the west side (left side) of the management target transmission line 17.
[0031]
The contents of management by the manager A are determined in advance, and the type of information to be acquired is determined according to the management contents. The management can include not only monitoring of the management target but also control of the management target. In other words, the manager A can also control the settings and operation status of the management target device 12 via the agent 11.
[0032]
When performing such management, it is also desirable for the manager A to display information acquired by the agent 11 on the manager A.
[0033]
Since the relationship between the agents 18 and 19 and the manager A is the same as that between the agent 11 and the manager A, the agent 11 is assumed to be an act system, and the following description will be given mainly focusing on the communication between the agent 11 and the manager A.
[0034]
Another manager B connected from the east side (right side) of the transmission line 17 may be software having the same function as the manager A.
[0035]
Regarding the relationship between the manager A and the manager B, various things can be considered.
[0036]
For example, if manager A and manager B manage at the same time and the contents of the management are different, manager A manages management object 14 and manager B manages management object 13. In the present embodiment, it is assumed that they are in a backup relationship with each other and have a duplex configuration.
[0037]
In the duplex configuration, manager A and manager B have the function of executing the management of exactly the same contents. However, for example, when manager A functions as a manager in the act system, manager B does not function as a manager in the standby system. When a failure occurs in the act manager A itself, system switching is performed, so that manager A becomes a standby system and manager B becomes an act system. This makes it possible to continue management without interruption even when a failure occurs.
[0038]
For example, even when the manager B is a standby system, the proxy connection unit 100B of the manager B needs to maintain a functioning state for the manager A of the act system.
[0039]
FIG. 1 shows a network management path A (31) connecting the manager A and the agent 11 counterclockwise from the west side of the transmission path 17, and from the east side of the transmission path 17 via the proxy connection unit 100B on the east side (clockwise). The network management path B (32) connected in FIG. If there is one network management path, communication between the manager and the agent can be performed. In this embodiment, the second network management path (redundant network management path) is set in this way. It has a configuration that can. If the network management path 31 is the first network management path, the network management path 32 is a redundant network management path. Conversely, if the network management path 32 is the first path, the network management path 31 is a redundant network management path.
[0040]
FIG. 2 shows an internal configuration of the network interface proxy connection units 100A and 100B added to the managers A and B, respectively.
[0041]
(A-1-1) Internal configuration of network interface proxy connection unit
In FIG. 2, the network interface proxy connection unit 100A includes a transmission line side connection transmission processing unit 200A, a network management network side connection transmission processing unit 300A, a message reception unit 400A, a message transmission unit 500A, and a message distribution unit 600A. I have.
[0042]
The message receiving unit 400A is a part that first receives a message from the manager A in the forward message transfer in which the message is transmitted from the manager A to be finally supplied to the agent 11.
[0043]
The message received by the message receiving unit 400A is normally sent to either the transmission line side connection transmission processing unit 200A or the network management network side connection transmission processing unit 300A by the message distribution unit 600A.
[0044]
When the network management path is set counterclockwise, the message distribution unit 600A sends the message in the forward direction to the transmission path side connection transmission processing unit 200A, and conversely when the network management path is set clockwise. This is a part for sending a message in the forward direction to the network management network side connection transmission processing unit 300A.
[0045]
In the backward message transfer in which the manager A receives the message transmitted by the agent 11, the message distribution unit 600A is supplied from the transmission path side connection transmission processing unit 200A or the network management network side connection transmission processing unit 300A. The message is sent to the message transmission unit 500A.
[0046]
The message transmission unit 500A is a part that transmits the backward message received from the message distribution unit 600A to the manager A.
[0047]
The message distribution unit 600A receives a message from the transmission path side connection transmission processing unit 200A in the counterclockwise direction from the agent 11 in order to supply the message to the manager A in the network management path 31 set in the counterclockwise direction. When receiving a message, or when receiving a backward message from the agent 11 for supplying to the manager B in a state where the manager B is an act system and the network management path 31 is set counterclockwise.
[0048]
The messages received by the message distribution unit 600A via the transmission path side connection transmission processing unit 200A for supply to the act manager B are sequentially transmitted from the message distribution unit 600A to the network management network side connection transmission processing unit 300A, the network. The data is supplied to the manager B via the management network side connection transmission processing unit 300B, the message distribution unit 600B, and the message transmission unit 500B.
[0049]
In addition, the message distribution unit 600A receives the message from the network management network side connection transmission processing unit 300A because the network management path 32 is set clockwise and the agent 11 is supplied to the act manager A. To receive messages from. At this time, the message received by the message distribution unit 600A is supplied to the manager A via the message transmission unit 500A.
[0050]
That is, among the constituent elements of the proxy connection unit 100A, at least the transmission path side connection transmission processing unit 200A, the message distribution unit 600A, and the network management network side connection transmission processing unit 300A have manager A acting and manager B standby. In the case of the system, the manager A must function even when the manager A is the standby system and the manager B is the act system.
[0051]
In addition, the network interface proxy connection unit 100A includes a network management path connection state table 1001A set / referenced by the transmission path side connection transmission processing unit 200A, the network management network side connection transmission processing unit 300A, and the message distribution unit 600A (see FIG. 3). ).
[0052]
Similar to the network interface proxy connection unit 100A, the network interface proxy connection unit 100B includes a transmission path side connection transmission processing unit 200B, a network management network side connection transmission processing unit 300B, a message reception unit 400B, and a message transmission unit 500B. A message distribution unit 600B, and a table 1001B having contents corresponding to the network management path connection state table 1001A.
[0053]
In the proxy connection unit 100B, the transmission line side connection transmission processing unit 200B corresponds to the transmission line side connection transmission processing unit 200A, the network management network side connection transmission processing unit 300B corresponds to the network management network side connection transmission processing unit 300A, Since the message receiver 400B corresponds to the message receiver 400A, the message transmitter 500B corresponds to the message transmitter 500A, and the message distribution unit 600B corresponds to the message distribution unit 600A, detailed description thereof will be omitted. .
[0054]
Next, the network management path connection state table 1001A (1001B) shown in FIG. 3 will be described. This table 1001A shows information related to the network management path currently used.
[0055]
(A-1-2) Network management path connection status table configuration
In FIG. Indicates a logical number for identifying each network management path, connection destination address DA indicates the address of the final transmission destination of the message, connection source address SA indicates the address of the transmission source of the message, The blocking flag FF indicates the connection state of the network management path.
[0056]
In the vacant / blocked flag FF, the connection state of the network interface proxy connection unit 100A is shown for each path. By examining this state, it can be determined whether each path is vacant or blocked. Further, it can be seen whether the connection target is a transmission line (transmission line 17 of the transmission line network 15) or a network management network.
[0057]
In the state shown in the figure, it is assumed that XXX of the connection destination address DA indicates the address of the agent 11, XXX1 indicates the address of the agent 18, and YYYY of the connection source address SA indicates the address of the manager A. A counterclockwise path 31 having a logical number 1 is set between the manager A and the agent 11 via the “transmission path”, and between the manager A and the agent 18 via the “network management network”. Thus, a clockwise path of logical number 2 is set.
[0058]
The logical numbers 3 to N (N is a positive integer) are “vacant”, that is, unused. Also, the logical number No. This difference indicates a logical difference in the network management path, and whether the free / blocked flag FF is “transmission path” or “network management network” depends on the physical path of the transmission path in which the network management path is set. Showing the difference.
[0059]
The contents of the table 1001B held by the proxy connection unit 100B of the manager B that is a standby system also correspond to FIG. Therefore, FIG. 3 can also be regarded as showing a table 1001B at a certain point in time.
[0060]
However, between the tables 1001A and 1001B, the logical number No. Does not necessarily correspond, and the logical number No. of FIG. Since the contents of the first column are unrelated to the proxy connection unit 100B, the table 1001B does not need to have the contents.
[0061]
Therefore, the table 1001B has at least the logical number No. of the table 1001A. What is necessary is just to provide the column corresponding to 2 columns.
[0062]
Further, in the present embodiment, due to the functions of the tables 1001A and 1001B, the column in which both the connection destination address DA and the connection source address SA are the same exists only in one of 1001A and 1001B, and does not exist in both. . That is, for example, when the connection destination address DA is “XXXX” and the connection source address SA is “YYYY” in the table 1001A, the same column for DA and SA is also present in the table 1001B. It is impossible. This is because communication between the same manager and agent is performed only in one of the counterclockwise and clockwise paths.
[0063]
In this embodiment, the No. The connection state FF in column 2 is “transmission path”. As a result, the message distribution unit 600B of the proxy connection unit 100B receives the message transmitted from the manager A to the agent 18 from the network management network side connection transmission processing unit 300B and sends it to the transmission path side connection transmission processing unit 200B. Can do.
[0064]
On the other hand, with regard to the backward direction in which the message is transmitted from the agent 18 to the manager A, the message follows the same route as the forward direction in the opposite direction, and the transmission path side connection transmission processing unit 200B, the message distribution unit 600B, the network management network side The proxy connection unit 100B is transferred in the order of the connection transmission processing unit 300B, and the network management network side connection transmission processing unit 300A, the message distribution unit 600A, and the message transmission unit 500A are transferred in this order in the proxy connection unit 100A. The configuration reaches the target manager A.
[0065]
The operation of the present embodiment having the above configuration will be described below. This operation is performed when manager A is an act system and manager B is a standby system.
[0066]
(A-2) Operation of the embodiment
FIG. 4 shows a processing flow when the manager A (21) connects to the agent 11. This is because the logical number of FIG. This is a process for storing the contents of the first column in the table 1001A.
[0067]
(A-2-1) Operation of network interface proxy connection unit 100A
As a premise, when connecting to the agent 11, the manager A (21) designates the address “XXXX” of the agent 11 and issues a connection request to the network interface proxy connection unit 100A.
[0068]
In FIG. 4, in the network interface proxy connection unit 100A, the message reception unit 400A receives the connection request from the manager A, and passes the connection request to the message distribution unit 600A (S1120).
[0069]
The message distribution unit 600A refers to the network management path connection state table 1001A and confirms the connection state to the agent 11 corresponding to the designated address “XXXX” (S1130).
[0070]
If this connection state is “free”, a connection request is sent to the transmission path side connection transmission processing unit 200A (S1140).
[0071]
The requested transmission path side connection transmission processing unit 200A executes the connection process for the agent 11 of the designated address “XXXX” (S1150). Then, “transmission path” (counterclockwise) is set in the connection state FF of the network management path connection state table 1001A.
[0072]
Further, the message transmission unit 500A is notified that the counterclockwise path (network management path A (31)) is connected, and the manager A is also notified of this connection state (S1170).
[0073]
If the connection process on the transmission line side fails, the connection request is transmitted to the network management network side connection transmission processing unit 300A without setting the connection state to the network management path connection state table 1001A and issuing the connection completion notification (S1180). ).
[0074]
Here, the failure of the connection process indicates the logical number No. of the counterclockwise route. This may occur when there is no free space in 1 to N, or when there is an unrecovered failure in the counterclockwise route.
[0075]
The network management network side connection transmission processing unit 300A executes a connection process to the network interface proxy connection processing unit 100B added to the east side manager B (22) connected via the network management network 16 (S1190). ).
[0076]
When the connection process is completed, “network management network” is set in the connection state FF of the network management path connection state table 1001A (S1200).
[0077]
At this time, the message transmitting unit 500A is notified that the clockwise path (network management path B (32)) is connected, and the manager A is also notified of the connection state (S1210).
[0078]
As a result, the manager A can inform the operator of whether the connection state FF of the network management path being used is “transmission path” or “network management network” by displaying the screen or the like.
[0079]
In the case of dynamic routing, if a failure occurs in the route during connection (see FIG. 7), an operation similar to the case of the connection processing failure is automatically performed. However, in step S1150, the connection is made with the clockwise route only when the connection cannot be made with the counterclockwise route. However, since the failure may occur in either the counterclockwise route or the clockwise route, dynamic routing is possible. The route newly selected by can be either clockwise or counterclockwise.
[0080]
If it is notified that a failure has occurred and communication between the manager A and the agent 11 is normally performed, it means that the route information has been automatically rewritten by dynamic routing. The route opposite to the route confirmed through A is the failure occurrence route.
[0081]
Next, FIG. 5 shows a processing flow of the network interface proxy connection unit 100B added to the manager B (22) on the east side requested to connect. This is an operation performed by the proxy connection unit 100B in response to the processing of the flowchart of FIG.
[0082]
(A-2-2) Operation of network interface proxy connection unit 100B
In FIG. 5, the network interface proxy connection processing unit 100B of the east manager B (22) sends a connection request from the manager A (21) on the west side to the network management network side connection transmission processing unit 300B and the message distribution unit 600B. The message reception unit 400B receives the connection request and passes the connection request to the message distribution unit 600B (S1320).
[0083]
The message distribution unit 600B refers to the network management path connection state table 1001B and confirms the connection state to the agent corresponding to the designated address (S1330).
[0084]
If the connection state is “free”, a connection request is sent to the transmission path side connection transmission processing unit 200B (S1340).
[0085]
The requested transmission path side connection transmission processing unit 200B executes the connection process for the agent 11 of the designated address “XXXX” (S1350). Then, “transmission path” is set in the connection state FF of the network management path connection state table 1001B (S1360).
[0086]
Here, since the designated address is XXXX, the connection process to the agent 11 is performed. However, if the designated address is, for example, XXX1, it is a connection process to the agent 18.
[0087]
Next, FIG. 6 shows a flow of message transmission / reception processing after the connection processing is completed. Only after the connection process is completed, a message corresponding to the above-described predetermined protocol is transmitted and received between the manager A and the agent 11 and the management is performed.
[0088]
(A-2-3) Operation of network interface proxy connection unit 100A during message transmission / reception
In FIG. 6, after the connection process is completed, the network interface proxy connection unit 100A waits for a message from the manager A by the message reception unit 400A (S1420).
[0089]
When the message from the manager A is received, the message is transferred to the message distribution unit 600A (S1430).
[0090]
The message distribution unit 600A refers to the network management path connection state table 1001A and identifies whether the currently connected network management path is the transmission path side or the network management network side (S1440).
[0091]
In the case of the transmission line side, a message is transmitted to the transmission line side connection transmission processing unit 200A (S1450). The transmission path side connection transmission processing unit 200A transmits a message to the agent 11 of the designated address “XXXX” (S1460).
[0092]
When the currently connected network management path is the path 32 on the network management network side, a message is transmitted to the network management network side connection transmission processing unit 300A (S1470).
[0093]
The network management network side connection transmission processing unit 300A transmits a message to the network interface proxy connection unit 100B added to the manager B (22) on the east side (S1480).
[0094]
The network interface proxy connection unit 100B added to the manager B (22) on the east side performs the same processing as when a message is received from the manager B, and sends a message to the agent 11 at the designated address “XXXX”. . As a result, an instruction regarding management can be transmitted from the manager A to the agent 11.
[0095]
On the other hand, when the manager A receives a message transmitted by the agent 11, the message is received by the manager A by being transferred in the opposite direction on the same path connecting the parts. . Thereby, the manager A can receive information acquired and collected by the agent 11 from the management target 12.
[0096]
As described above, when a message is exchanged between the manager A and the agent 11 (during connection), a failure may occur in the network monitoring path (network management path) used for the exchange. .
[0097]
Here, it is assumed that the network monitoring path used for the exchange and in which the failure has occurred is the path A (31), and the flow of processing when reconnecting to the network monitoring path B (32) is shown in FIG. Show.
[0098]
(A-2-4) Operation when a failure occurs
In FIG. 7, the transmission path side connection processing unit 200A of the network interface proxy connection processing unit 100A added to the manager A (21) detects a failure in the network management path A (31) (S1620).
[0099]
When detecting a failure, the transmission path side connection processing unit 200A changes the connection state of the path in the network management path connection state table 1001A to “free” (S1630).
[0100]
Then, the address “XXXX” of the corresponding agent 11 is designated and a connection request is issued to the network management network side connection transmission processing unit 300A (S1640).
[0101]
The network management network side connection transmission processing unit 300A executes connection processing to the network interface proxy connection processing unit 100B added to the east side manager B (22) connected via the network management network (S1650). .
[0102]
When this connection processing is completed, the network management network side connection transmission processing unit 300A sets “network management network” as the connection status in the network management path connection status table 1001A (S1660).
[0103]
The message transmission unit 500A is also notified that the network management path B (32) is connected, and the manager A is notified of which network management path is connected (S1670).
[0104]
(A-3) Effects of the embodiment
According to the present embodiment, the act manager can connect to each agent without being aware of the network interface proxy connection unit, and the operator can check which network management path is being used.
[0105]
Therefore, the operator of the manager who is also a maintenance inspector can immediately specify the failure occurrence route.
[0106]
(B) Other embodiments
In the above embodiment, dynamic routing has been described as an example. However, the present invention can also be applied to static routing.
[0107]
Rather, the advantage of the present invention of the specific speed of the failure path is even more effective when applied to static routing where even the resumption of communication after a failure occurs is left to the operator.
[0108]
In other words, when it is applied to dynamic routing, it only speeds up the start of recovery work for the failure path. However, when it is applied to static routing, it starts recovery work for the faulty path earlier and normal operation between the manager and agent is normal. The resumption of communication is also accelerated.
[0109]
In the case of static routing, since the program does not automatically rewrite the route information, for example, an operator who has received a notification of failure occurrence confirms the table 1001A shown in FIG. 3 displayed on the screen by an act manager. At this time, if the communication between the manager A and the agent 11 is not normally performed, it can be seen that a failure has occurred in the “transmission path”, that is, the counterclockwise path. The normal communication between the manager A and the agent 11 can be resumed immediately by performing an operation corresponding to the operation of rewriting the connection state FF of 1 from “transmission path” to “network management network”.
[0110]
In the above-described embodiment in which dynamic routing is performed, the manager A displays the current connection state as it is. However, when the route information is automatically rewritten due to the occurrence of a failure, the rewrite is performed to prevent misidentification. The manager A may be equipped with a function of displaying the previous connection state FF as a failure occurrence path.
[0111]
This function may or may not be present in cases where there are only two network management paths or static routing, but in dynamic routing where there are three or more usable network management paths. Required. This is because, even after displaying the network management path that is currently used after the route information has been automatically rewritten, the failure occurrence route cannot be identified.
[0112]
On the other hand, in the above-described embodiment, an example in which the redundant network management path using the transmission line itself to be managed is shown. However, the present invention is applicable to any system having a redundant network management path. .
[0113]
In the above embodiment, one redundant network management path is available and a total of two network management paths are possible. However, in the present invention, three or more network management paths can be set.
[0114]
Furthermore, in the said embodiment, although the number of managers was two, A and B, one may be sufficient and three or more may be sufficient.
[0115]
That is, the present invention is provided with a plurality of system agents arranged in each management target, a system manager that manages the management target via the system agent, and a plurality of the system managers to communicate with the system agent The present invention can be widely applied to a network management system provided with a management communication path.
[0116]
【The invention's effect】
As described above, according to the present invention, the route information related to the management communication route can be recognized and displayed by the system manager, and the number and time of maintenance and inspection can be reduced. In addition, a highly reliable network management system can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a configuration of a transmission line network management system according to an embodiment.
FIG. 2 is a block diagram illustrating an internal configuration of a network interface proxy connection unit according to the embodiment.
FIG. 3 is a schematic diagram showing a configuration of a network management path connection state table.
FIG. 4 is a flowchart showing the operation of the embodiment.
FIG. 5 is a flowchart showing the operation of the embodiment.
FIG. 6 is a flowchart showing the operation of the embodiment.
FIG. 7 is a flowchart showing the operation of the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Transmission path network management system, 11 ... Agent, 12-13 ... Communication apparatus, 15 ... Transmission path network, 16 ... Network management network, 21, 22 ... Manager, 100A, 100B ... Network interface proxy connection part.

Claims (2)

A system agent arranged in each management target, a system manager for managing the management target via the system agent, and a plurality of management communication paths physically provided for the system manager to communicate with the system agent In a network management system comprising:
Functions independently of the system agent and the system manager, and connects the system manager and the system agent through one selected management communication path among the plurality of management communication paths provided for the system manager. Connection processing means;
A network management system comprising: communication path notification means for notifying the system manager of path information related to the management communication path selected by the connection processing means. The network management system according to claim 1,
The management communication path is:
2. A network management system comprising a plurality of target transmission lines that connect the management targets.

Images