JP3114656B2 - Network configuration detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network management system having a network management device for displaying a physical connection configuration of a device to be managed in a network, and more particularly to a network configuration detection for recognizing the network connection configuration of the device to be managed. Related to the device.

[0002]

2. Description of the Related Art Conventionally, when a network configuration is detected by a network management device, the device to be managed is provided with physical connection information, and the physical connection information is transmitted from the device to be managed to the network management device. Physical connection information of the management target device is collected from the management device.

FIG. 4 is a block diagram showing a configuration example of a device for detecting the configuration of a network disclosed in Japanese Patent Laid-Open No. 4-296136. In this conventional example, in a network including concentrators 61 to 65 in which terminals T1 to T7 each having an individual address are connected to each of a plurality of lower ports, the individual concentrators 61 to 65 are connected to their own lower ports. The address of the terminal T is stored in the address storage means M for each port, and a packet including the data of the address for each port is generated by the packet generating means G and sent to a network management device (not shown). Thus, the network management device may be connected to any place on the network, and can detect the connection configuration of the network by checking the inclusion relation of the addresses for each port from each of the concentrators 61 to 65.

[0004]

As described above, in the conventional system, the managed device has the physical connection information, and even if the managed device does not need to have the physical connection information, It is necessary to register the physical connection information for the managed device only in order to display the network configuration in the network management device, which is troublesome in the operation of the network and deteriorates the maintainability of the network. Was. Further, in the conventional system, the address of the terminal connected to the lower port of the managed device is stored in the managed device. Therefore, when a loop is formed between the managed devices, the There is a possibility that the own device may be registered in a lower order. Therefore, in the case of a network configuration in which a loop is formed by the physical connection of each managed device, there has been a problem that the network configuration cannot be accurately recognized. Therefore, an object of the present invention is to recognize and display a network configuration in a network management device without registering the physical connection information in the managed device when the managed device does not need to have the physical connection information. And It is another object of the present invention to recognize and display a network configuration in a network management device regardless of a network configuration mode.

[0005]

SUMMARY OF THE INVENTION To solve such a problem, the present invention relates to a network management system having a network management device for displaying a physical connection configuration of a device to be managed in a network. A line control pattern creating unit for turning on / off the physical signal line of the managed device in an arbitrary pattern, and a pattern created by the line control pattern creating unit for the on / off detection signal of the physical signal line received from the managed device. A line failure pattern search unit for comparing with a line control unit that turns on / off a physical signal line in accordance with an instruction from a line control pattern creation unit, and detects on / off of a physical signal line in the managed device. And a line operation detecting unit for transmitting an on / off detection signal to the network management device. In addition, the line failure pattern search unit
When the on / off pattern of the physical signal line received from the managed device other than the managed device specified by the line control pattern creating unit matches the pattern created by the line control pattern creating unit, these managed devices are This is to recognize the connection between them.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a network to which the present invention is applied. In FIG. 1, the network includes managed devices 1 to 4 and each managed device 1.
4 to monitor the network management device 5.

The managed device 1 receives a control signal for turning on / off a line port sent from the network management device 5, and turns on / off the line port.
And a line failure detection unit 12 that detects ON / OFF of a line port in the device to be managed and notifies the network management device 5 of the ON / OFF. Further, the managed device 1 has line ports 101, 10 as ports for accommodating physical lines (physical signal lines).
2, 103.

Similarly, the management target device 2 includes a line control unit 21
And line failure detection unit 22, and line ports 201 and 20
2, 203. Similarly, the managed device 3 also has a line control unit 31, a line failure detection unit 32, and line ports 301 and 302. Further, the management target device 4 also has a line control unit 41, a cyclic failure detection unit 42, and line ports 401 and 402.

On the other hand, the network management device 5 includes
A line control signal transmitting unit 51 for transmitting a control request signal for turning on / off a line port of the managed device 1
And a line fault receiver 52 for receiving on / off detection signals of the physical signal lines sent from the respective line fault detectors. Further, the network management device 5 includes a line control pattern creating unit 53 for creating an on / off pattern of the line port for recognizing the physical connection configuration of the line, and an on / off of the line port received by the line failure receiving unit 52. And analyze
A line failure pattern search unit 54 for determining whether or not the pattern is the same as the pattern created by the line control pattern creation unit 53.

The operation of the network configured as described above will be described with reference to the flowchart of FIG. Here, the managed device 4 is newly connected to the network,
The operation when the network management device 5 recognizes the network connection configuration of the managed device 4 will be described. When the network management device 5 detects that the management target device 4 has been newly added to the network (step S1), the network management device 5 determines a line control pattern using the line control pattern creation unit 53 (step S1).
2) The management target device 4 using the line control signal transmission unit 51
A line control signal for turning on / off the line port 401 is transmitted (step S3).

In this case, upon receiving the line control signal from the network management device 5, the management target device 4 turns on / off the physical signal line 2B of the line port 401 using the line control unit 41 (step S4). . Thereby, the management target device 4
The line failure detection unit 42 detects port on / off of the own line port 401 (step S5), and transmits it to the network management device 5 as a line failure detection signal (step S6).

The line port 401 and the physical signal line 2B
The line fault detection unit 22 of the management target device 2 which is the opposite connection destination connected via the network also detects on / off of the line port 203 connected to the line port 401 (step S7), and the network management device 5 Then, a line failure detection signal is transmitted (step S8). In the network management device 5, the line failure receiving unit 52 receives the line failure detection signals from the managed devices 4 and 2 (step S9). Further, the line failure pattern search unit 54 analyzes the line failure detection signal received by the line failure reception unit 52, and the line control signal transmission unit 5 created by the line control pattern creation unit 53.
1 is compared with the pattern transmitted from step 1 (step S1).
0).

The line failure pattern search unit 54 recognizes that the line port 401 of the managed device 4 and the line port 203 of the managed device 2 match the pattern of the line control pattern creating unit 53 (step S11). As a result, the network management device 5 sets the line port 40 of the
1 and the line port 203 of the managed device 2 are recognized to be connected (step S12).

Similarly, the network management device 5 manages the managed device 4
Also, the line control pattern is determined using the line control pattern creation unit 53 and the line control signal is transmitted using the line control signal transmission unit 51 to the line port 402. When the management target device 4 receives the line control signal from the network management device 5, it uses the line control unit 41 to
Of the physical signal line 1C is turned on / off. As a result, the line failure detection unit 42 of the managed device 4
2 is detected as on / off and transmitted to the network management device 5 as a line failure detection signal. Further, the line failure detection unit 12 of the managed device 1 which is the opposite connection destination connected to the line port 402 via the physical signal line 1C also detects the on / off of the own line port 103 connected to the line port 402. Then, a line failure detection signal is transmitted to the network management device 5.

In the network management device 5, the line failure receiving unit 52 receives the line failure signals from the managed devices 4 and 1, and the line failure pattern search unit 54 receives the line received by the line failure receiving unit 52. The failure detection signal is analyzed and compared with the pattern created by the line control pattern creation unit 53 and transmitted from the line control signal transmission unit 51. The line failure pattern search unit 54 recognizes that the line port 402 of the managed device 4 and the line port 103 of the managed device 1 match the pattern of the line control pattern creation unit 53. Thus, the network management device 5 recognizes that the line port 402 of the managed device 4 and the line port 103 of the managed device 1 are connected.

Next, the operation of the main part of this embodiment will be described in more detail with reference to the time chart of FIG. FIG. 3 shows an example of a line on / off pattern held by the line control pattern creation unit 53 of the network management device 5. In FIG. 3, a pattern A is a pattern in which on / off of a physical signal line is repeated five times at 1 second intervals, and a pattern B is a pattern.
Is an example of a pattern in which a pattern of turning off for 2 seconds and a pattern of on for 1 second are repeated three times, and a pattern C is an example of a pattern in which off / on is repeated three times at 2-second intervals.

The operation when the managed device 4 is newly connected to the network and the network management device 5 recognizes the physical connection configuration of the managed device 4 will be described in the same manner as described with reference to FIG. When the network management device 5 detects that the management target device 4 has been newly added to the network, the line control pattern creation unit 53 determines that the line control pattern is the pattern A. And the line port 401 of the managed device 4 using
Is transmitted.

Upon receiving the line off instruction signal from the network management device 5, the managed device 4 turns off the physical signal line 2B of the line port 401 using the line control unit 41. As a result, the line failure detection unit 42 of the management target device 4 detects that the physical signal line 2B of the line port 401 is off, and transmits a line off detection signal of the line port 401 to the network management device 5.
At the same time, the line failure detection unit 22 of the management target device 2 also detects the line off of the line port 203 and transmits a line off detection signal of the line port 203 to the network management device 5.

In the network management device 5, these line off detection signals are received by the line fault receiving unit 52. One second later, the network management device 5 transmits a line-on instruction signal to the line port 401 of the managed device 4 using the line control signal transmission unit 51. The management target device 4 is a network management device 5
Receiving the line on instruction signal from the
To turn on the physical signal line 2B of the line port 401. As a result, the line failure detection unit 42 of the managed device 4
This time, the ON of the physical signal line 2B of the line port 401 is detected, and the line ON detection signal of the line port 401 is transmitted to the network management device 5. At the same time, the line failure detection unit 22 of the management target device 2 also detects the line ON of the line port 203 and transmits a line ON detection signal of the line port 203 to the network management device 5. In the network management device 5, these line ON detection signals are received by the line failure receiving unit 52.

Similarly, the line control pattern creating section 53 of the network management device 5 repeats on / off control of the line at one-second intervals a total of five times. These ON / OFF are controlled by the network management device 5
Are transmitted as a line off detection signal and a line on detection signal, and are received by the line fault receiving unit 52. Thereafter, the network management device 5 analyzes the number of receptions and the interval of the line off detection signal and the line on detection signal received by the line failure reception unit 52 by the line failure pattern search unit 54, and
It is detected that the on / off of the line detected from 01 and 203 is the same as the pattern A created and transmitted by the line control pattern creating unit 53. Thereby, the network management device 5 recognizes that the line port 401 of the managed device 4 and the line port 203 of the managed device 2 are connected by the physical signal line 2B.

Similarly, the line port 40 of the managed device 4
In order to detect the connection destination to the network control device 5, the network control device 5 determines the line control pattern to be pattern B using the line control pattern creation unit 53, and first uses the line control signal transmission unit 51 to issue a line off instruction. A signal is transmitted, then a line-on instruction signal is transmitted two seconds later, a line-off instruction signal is transmitted one second later, and then a process of transmitting a line-on instruction signal two seconds later is repeated a total of three times. Accordingly, the operation of receiving the line-off detection signal from the line port 402 of the managed device 4 and the line port 103 of the managed device 1, the line-on detection signal after two seconds, and the line-off detection signal after one second are all performed. Repeat three times.

Thereafter, the network management device 5 analyzes the number of receptions and the interval of the line off detection signal and the line on detection signal received by the line failure reception unit 52 by the line failure pattern search unit 54, and this time, the line ports 402 and 103 It is detected that the on / off of the line detected in (1) is the same as the pattern B created and transmitted by the line control pattern creating unit 53. Thereby, the network management device 5 recognizes that the line port 402 of the managed device 4 and the line port 103 of the managed device 1 are connected by the physical signal line 1C.

As described above, by turning on / off the line port of the device to be managed in an arbitrary pattern, the line port to which the physical line is connected shows the same on / off pattern. The network management device can recognize the physical connection configuration of each management target device without giving the target device physical connection configuration information.

[0024]

As described above, according to the present invention, the network management device turns on / off the physical signal line of the managed device in an arbitrary pattern and turns on / off the physical signal line received from the managed device. Since the connection between each managed device is detected by comparing the / off detection signal with the pattern, the network management device recognizes the network configuration without registering the physical connection information in the managed device. And can be displayed. In addition, the network management device can accurately recognize and display the network configuration regardless of the network configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of a network to which the present invention has been applied.

FIG. 2 is a flowchart illustrating operations of a network management device and a management target device that configure a network.

FIG. 3 is a diagram showing an on / off pattern of a line port instructed from the network management device to the device to be managed.

FIG. 4 is a block diagram illustrating an example of conventional network configuration detection.

[Explanation of symbols]

1-4: managed devices, 5: network management devices, 11, 21,
31, 41 ... line control unit, 12, 22, 32, 42 ... line failure detection unit, 51 ... line control signal transmission unit, 52 ... line failure reception unit, 53 ... line control pattern creation unit, line failure pattern search unit, 101 to 103, 201 to 203, 3
01, 302, 401, 402 ... line port, 1A-1
C, 2A, 2B: physical lines (physical signal lines).

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-250745 (JP, A) JP-A-4-296136 (JP, A) JP-A-5-336135 (JP, A) JP-A 8- 84158 (JP, A) 1997 IEICE Communication Society Conference Proceedings 2, B-7-52, Toshiyuki Ogura, et al. “Development of Integrated Network Management System”, p. 130 (58) Int.Cl. ⁷ , DB name) H04L 12/28 H04L 12/24 H04L 12/26

Claims (2)

(57) [Claims] 1. A network management system having a network management device for displaying a physical connection configuration of a device to be managed in a network, wherein the network management device includes a physical signal line connected to a line port of the device to be managed. A line control pattern creating unit for turning on / off the pattern, and a line fault pattern searching unit for comparing the on / off detection signal of the physical signal line received from the device to be managed with the pattern created by the line control pattern creating unit. A line control unit for turning on / off a physical signal line in accordance with an instruction of the line control pattern creating unit, detecting on / off of the physical signal line, and transmitting the on / off detection signal to the network management device; A network configuration detecting device, comprising: a line operation detecting unit for transmitting to a device. 2. The system according to claim 1, wherein the line failure pattern search unit turns on / off a physical signal line received from a second managed device other than the first managed device specified by the line control pattern creating unit. A network configuration detecting device for recognizing connection between the first and second managed devices by the physical signal line when an off pattern matches a pattern created by the line control pattern creating unit.