JP2003032257A - Method of specifying installed spot of lan component unit and retrieval device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of easily specifying installed spot of a LAN component unit with a MAC address from the MAC address. SOLUTION: A retrieval device sequentially transmits an IP packet to all the LAN component units. The retrieval device demands the LAN component units, which have returned a normal response, that a port number in a MAC address learning table and a MAC address as extension MIB information are stored in an extension MIBMAC address learning table. Then, each information of extension MIBMAC address learning table is gathered from the LAN component units, and a MAC address learning list table is generated. The retrieving device specifies the installed spot of the LAN component unit with the designated MAC address, by retrieving the MAC address learning list table.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a LAN (Local Area).
a Network), the devices that make up the LAN (hereinafter LA
The present invention relates to a method and a search device for identifying the installation location of the LAN constituent device based on the MAC address given to the N constituent device). With the recent development of network technology, the scale of LAN has increased, and the number of LAN constituent devices and the number of terminal devices accommodated in the LAN constituent devices has also increased. When a failure occurs in such a network environment, the MAC address of the failed terminal device can be easily determined by checking the transmitted / received IP packet.

However, in a large scale LAN,
Even if the MAC address of the faulty terminal device is found, it is difficult to determine where the terminal device is installed, and it takes a long time to recover from the fault. In such a LAN, there is a demand for a method of identifying the installation location of a LAN constituent device and a search device that can easily identify the installation location of the terminal device in which a failure has occurred, from the MAC address of the terminal device in which a failure has occurred.

[0003]

2. Description of the Related Art FIG. 14 is a diagram for explaining the system configuration of the prior art. In FIG. 14, reference numeral 400 denotes a bridge device as a LAN configuration device that transfers a packet to a transfer destination of an address specified by the header of the packet,
Reference numerals 410, 411, 412, 420, and 421 are hub devices as LAN constituent devices that transfer the packet to the transfer destination of the address specified by the header of the packet. Further, 300 and 310 are terminal devices connected to the hub devices 412 and 421.

The bridge device 400 comprises an IP processing unit 10A and a MAC address learning table (shown as a learning table in the figure) T11, and hub devices 410, 411, 4 are provided.
12, 420, and 421 include an IP unit 10A and a MAC address learning table T11. Bridge device 400
IP section 10A and IPs of hub devices 410 to 421
The unit 10A has an IP packet transmission / reception function. Although the number of networks is one in FIG. 14, the bridge device 400 can also connect a plurality of networks.

Here, the MAC address learning table T1
Reference numeral 1 is a table for registering the source MAC address of the received IP packet when the layer 2 IP packet is received, in correspondence with the receiving ports of the bridge device 400 and the hub device 4ij (i, j = arbitrary number). In FIG. 14, when the terminal device 300 and the terminal device 310 communicate with each other, the path passing through the LAN constituent devices (hereinafter, the bridge device 400 and the hub device 4ij are collectively referred to as the LAN constituent device) forming the LAN is the terminal device 300. ⇒ Hub device 41
2 ⇒ hub device 410 ⇒ bridge device 400 ⇒ hub device 4
20-> hub device 421-> terminal device 310.

At this time, in the MAC address learning table T11 of the hub device 412, the hub device 410, the bridge device 400, the hub device 420, and the hub device 421 that have passed through, the MAC address of the terminal device 300 and the packet from the terminal device 300 are all included. The received port number is registered. Here, when a failure occurs in the terminal device 300,
In order to specify the installation location of the terminal device 300, Telnet (login to another computer from a remote location and perform remote control based on LAN configuration device information such as the MAC addresses of the bridge device 400 and the hub devices 410 to 421). The MAC address learning table T peculiar to the vendor of each LAN component is performed by remotely logging in to each LAN component from the management terminal 500 via the virtual terminal protocol).
A display command for displaying 11 is input, the MAC address learning table T11 is displayed, and the display is manually analyzed to specify the installation location of the LAN component equipment.

[0007]

In the prior art described with reference to FIG. 14, for example, since an IP address is manually set in each LAN constituent device, there is a case where the IP address is erroneously set in duplicate. . When the LAN constituent device having the duplicated IP address is a server, communication with this server becomes impossible.

However, since the LAN used by each company has become large-scale and the business environment of the company is becoming severe, the organization is changed and the personnel are frequently moved within the company. Therefore, the layout of LAN constituent devices is frequently changed. However, a LAN including a terminal device
There are few companies that manage the LAN by constructing a LAN management database that includes the arrangement of constituent devices.

In such a LAN, when a failure occurs in the LAN constituent device and its MAC address is found, it is necessary to identify the installation location of the failed LAN constituent device from the MAC address and take measures. Become. However, in general, the LAN constituent device information does not manage the connection destination port and the MAC address in many cases. Therefore, in order to identify the installation location of the LAN constituent device from the MAC address, a high technique and long time are required. It takes time.

According to the present invention, when a failure occurs in a LAN constituent device, installation of the LAN constituent device can easily identify the installation place of the LAN constituent device having the MAC address from the MAC address of the failed LAN constituent device. An object is to provide a method of identifying a place and a search device.

[0011]

According to a first aspect of the present invention, there is provided a method for identifying a location of a LAN constituent device to which a MAC address is assigned, wherein a search device for identifying the location of the LAN constituent device from the MAC address is provided. An IP address list table is generated from the entered segment numbers and IP addresses of LAN constituent devices, and IP packets are sequentially transmitted to all LAN constituent devices registered in the IP address list table. L returned a response to
The LAN that extracted the AN constituent device and returned a normal response
For the constituent device, the port number and the MAC address in the MAC address learning table are set to the extended MIB information (MI
B ManagementInformation Base is an LA for hub devices, etc.
(It defines the items for managing the N component devices, and the extended MIB is a management item determined by the manufacturer.)
As an instruction to store in the extended MIB MAC address learning table, the information of the extended MIB MAC address learning table is collected from the LAN configuration device normally stored in the extended MIB MAC address learning table,
The MAC address learning list table of the LAN constituent devices in the network is generated, the MAC address learning list table is searched, and the L having the specified MAC address is generated.
This is a method for identifying the installation location of a LAN configuration device that identifies the installation location of an AN configuration device.

According to the first aspect of the present invention, for example, when a failure occurs in a LAN constituent device that constitutes a LAN and the installation location of the LAN constituent device is specified from its MAC address, first, an IP is determined from the segment number and the IP address. Generate an address list table. When the MAC address search command is input from the search device, the search device determines that the input command is the MAC address search command, and then all the L addresses registered in the IP address list table are searched.
IP packets are sequentially transmitted to the AN constituent device, and the LAN constituent device whose IP packet response is normal is specified.

Next, L which normally responds to the IP packet
The AN constituent device is instructed to store the information in the MAC address learning table in the extended MIB MAC address learning table, and the result is received.
Here, the extended MIB MAC of each LAN constituent device
Since the information in the MAC address learning table is stored in the address learning table, the search device collects the information of the extended MIB MAC address learning table from each LAN constituent device and generates the MAC address learning list table.

In the MAC address learning list table, L
The MAC addresses and port numbers of all LAN constituent devices in the AN and the MAC addresses of LAN constituent devices accommodated in the port numbers are written. This MAC address learning list table is searched to determine the connection status for each port number of each LAN constituent device to determine the specified MAC.
The installation location of the LAN constituent device having the address is specified.

A second aspect of the present invention is a method for identifying the installation location of a LAN constituent device to which a MAC address is assigned, which is LA
The search device that identifies the installation location of the N component device from the MAC address detects all LAs within the entered segment number.
LAN that has transmitted an IP packet by broadcast to N constituent devices and has normally returned a response to the IP packet
Automatically generate an IP address list table from the configuration device,
All L's registered in the IP address list table
IP packets are sequentially transmitted to the AN constituent device, LAN constituent devices that normally return a response to the IP packet are extracted, and to the LAN constituent device that normally returns a response,
Port number and MA in MAC address learning table
Extended MIB MAC with C address as extended MIB information
The extension MI is instructed to be stored in the address learning table.
The L stored normally in the BMAC address learning table
Information of the extended MIB MAC address learning table is collected from the AN constituent device to generate a MAC address learning list table of the LAN constituent devices in the network, and the MAC address learning list table is searched to specify the specified MAC address. Is a method for identifying the installation location of a LAN configuration device for identifying the installation location of the LAN configuration device.

According to the second aspect of the invention, for example, when a failure occurs in a LAN constituent device that constitutes a LAN and the installation location of the LAN constituent device is specified from its MAC address, a MAC address search command is input from the searching device. To do. When the search device determines that the input command is a MAC address search command, it sends an IP packet by broadcast to all LAN constituent devices in the specified segment, and returns a response to the IP packet normally. An IP address list table is automatically generated from the constituent devices.

Next, the IP packet is sequentially transmitted to all the LAN constituent devices registered in the IP address list table, and the LAN constituent device for which the IP packet response is normal is specified. Next, L that normally responds to the IP packet
The AN constituent device is instructed to store the information in the MAC address learning table in the extended MIB MAC address learning table, and the result is received.
Here, the extended MIB MAC of each LAN constituent device
Since the information in the MAC address learning table is stored in the address learning table, the search device collects the information of the extended MIB MAC address learning table from each LAN constituent device and generates the MAC address learning list table.

In the MAC address learning list table, L
The MAC addresses and port numbers of all LAN constituent devices in the AN and the MAC addresses of LAN constituent devices accommodated in the port numbers are written. This MAC address learning list table is searched to determine the connection status for each port number of each LAN constituent device to determine the specified MAC.
The installation location of the LAN constituent device having the address is specified.

A third aspect of the present invention is a search device for identifying the installation location of a LAN constituent device to which a MAC address has been assigned, the command receiving part analyzing an input command, and the command receiving part input via the command receiving part. An IP address list table generation unit that generates an IP address list table from the segment number and the IP address of the LAN constituent device,
In the LAN constituent device registered in the IP address list table, the extended MIBMA is set with the port number and the MAC address in the MAC address learning table as extended MIB information.
The MAC address learning table pre-collection processing unit for instructing the storage in the C address learning table and collecting the storage result, and the information of the extended MIB MAC address learning table of the LAN constituent device that has normally returned a response. ,
A MAC address learning table collection processing unit that generates a MAC address learning list table; and a MAC address search processing unit that searches the MAC address learning list table and identifies the installation location of the LAN constituent device having the specified MAC address. It is a search device equipped with.

According to the third aspect of the invention, the search device analyzes the command input in the command reception unit, and when the input command is the IP address list table generation command, activates the IP address list table generation unit. Then, the IP address list table is manually generated from the segment number and the IP address input at the same time. Then MAC
The address learning table pre-collection processing unit determines whether the LAN constituent devices stored in the IP address list table are
An instruction to store the information in the C address learning table in the extended MIB MAC address learning table is issued, and the result is received. The MAC address learning table collection processing unit selects an extension M from the LAN configuration device that can store the MAC address learning table in the extended MIB MAC address learning table.
Collect the information of IBMAC address learning table,
A C address learning list table is generated.

This MAC address learning list table stores all the LAN constituent devices in the LAN, their MAC addresses, and port numbers and the MAC addresses of the LAN constituent devices accommodated for each port number. The MA specified by searching the MAC address learning list table by the processing unit.
The installation location of the LAN constituent device having the C address can be specified.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining the system configuration of the present invention. In FIG. 1, 100 is a packet,
A bridge device as a LAN configuration device that transfers to a transfer destination of an address specified by a header in the packet, and 110, 111, 112, 120, and 121 are packets of the address specified by the header in the packet. It is a hub device as a LAN constituent device that transfers to a transfer destination. Although the number of networks is one in FIG. 1, the bridge device 400 can also connect a plurality of networks. Further, 300 and 310 are hub devices 11.
2, 121 is a terminal device connected to.

The bridge device 100 and the hub device 1
10, 111, 112, 120, 121 are IP processing units 1
0A, MAC address learning table T11 and extension M
An IBMAC address learning table (shown as an extended MBT in the figure) T12. The IP processing unit 10A and the MAC address learning table T11 of the bridge device 100 and the hub devices 110 to 121 are the same as those described in the related art of FIG.

In the present invention, each LAN constituent device is provided with an extended MIB MAC address learning table T12. According to the present invention, by using the extended MIB, it is possible to collect the extended MIB MAC address learning table T12 from each LAN constituent device by the same processing even in a multi-vendor environment. In FIG. 1, when the terminal device 300 and the terminal device 310 communicate with each other, the path passing through the LAN constituent devices forming the LAN is: terminal device 300 ⇒ hub device 112 ⇒ hub device 1
10 ⇒ bridge device 100 ⇒ hub device 120 ⇒ hub device 121 ⇒ terminal device 310, and packets are received from the MAC address of the terminal device 300 and the terminal device 300 in all the MAC address learning tables T11 of the LAN constituent devices that have passed through. The operation to register the port number is shown in Fig. 1.
4 is the same as the prior art. (In FIG. 1, the state is shown in which the MAC address of the terminal device 300 is “a” and the MAC address “a” is written corresponding to the received port number.) In this state, the search terminal 200 registers in the IP address list table. To all the LAN configuration devices
Ping request of (Internet Control Message Protocol, protocol for error notification and communication status diagnosis)
(A command for checking whether or not an IP packet has reached the destination on the TCP / IP network) is transmitted. Upon receiving the Ping request, the LAN constituent device Ping
The Ping response to the request is returned to the search terminal 200.

During the transmission / reception of this Ping, the port that received the Ping request is also connected to the LAN constituent device that has transmitted the Ping request, in this case M of the search terminal 200.
The AC address is registered. (In FIG. 1, the state is shown in which the MAC address of the search device 200 is “b” and the MAC address “b” is written corresponding to the received port number.) The search device 200 updates the information in the MAC address learning table T11 with the extended MIBMAC. A command to be written in the address learning table T12 is sent. By writing the information of the MAC address learning table T11 of each LAN constituent device in the extended MIB MAC address learning table T12,
From the search device 200, expand M of all LAN constituent devices
The IBMAC address learning table T12 can be collected by the extended MIB. In this way, the extended MIBMA of all LAN components in the network
The information of the C address learning table T12 is searched by the search device 200.
MAC address learning list table T22 (shown as a learning list table in the figure).

This MAC address learning list table T2
It is possible to easily specify the LAN constituent device accommodating the LAN constituent device having the designated MAC address and the port number by searching for No. 2 according to the following procedures (1) to (3). (1) The search device 200 searches the MAC address learning list table T22 with the specified MAC address “a”. Here, in the MAC address learning list table T22, LAN constituent devices (hub device 111 in FIG. 1) that have not learned the designated MAC address “a” are excluded.

(2) Specified MAC address "a"
A Ping request is transmitted to the LAN constituent device that is learning. At this time, the extended MIB is collected from the LAN constituent device that has transmitted the Ping request, and the MAC address learning list table T22 is updated. Here, the MAC address “a” designated in the process of (1) is written in L
The port number of the AN constituent device is extracted, and it is searched whether or not the MAC address "b" of the search device 200 is written in the port number.
The constituent device (the hub device 121 in FIG. 1) is excluded.

(3) M in the remaining LAN constituent devices (bridge device 100, hub devices 110 and 112 in FIG. 1)
The port number in which the AC address "a" was written is extracted. It is searched whether or not the MAC address of any of the LAN constituent devices exists in the extracted port number of the LAN constituent device, and if there is nothing, the LAN constituent device having the port number (the hub of FIG. 1). The device 112) becomes a LAN constituent device having a designated MAC address.

FIG. 2 is a diagram for explaining the configuration of the search device according to the first embodiment of the present invention. In FIG. 2, 201 is a command reception unit, 202 is an IP address list table generation unit, T21 is an IP address list table, 203 is a MAC address learning table pre-collection processing unit, and 204 is a MAC address learning table collection unit. A processing unit, 205 is an ICPM unit, 206 is an IP unit, 20
7 is SNMP (Simple Network Management Protocol,
Management protocol under TCP / IP network environment) Manager unit, T22 is MAC address learning list table, 2
Reference numeral 08 is a MAC address search processing unit, 209 is a command output unit, and 210 is a MAC address management unit.

In FIG. 2, the command receiving unit 201 analyzes the input command, and the command is “IP address list generation command (command in the figure indicates CMD)”.
If it is determined that the IP address list table generation unit 202
To generate an IP address list table T21 from the input segment number and IP address. Then, when a search command is input, Ping of ICPM
The ICPM unit 205 is requested to send the request. Then M
The collection processing unit 203 before the AC address learning table is set to Pin.
IP to the LAN constituent device that normally responds to the request.
Extended MIB MAC address learning table T1 by packet
2 is generated. The MAC address learning table collection processing unit 204 instructs the SNMP manager unit 207 to execute the GE for the LAN constituent device that normally responds to the IP packet.
Extended MIB MAC address learning table T to T command
Request transmission by setting the index value in which 12 is stored. Then, when the extended MIB attribute in the GET response to the GET command is the extended MIB MAC address learning list table, the contents of the extended MIB MAC address learning table T12 are stored in the MAC address learning list table T22 in correspondence with the port numbers.
Store the address.

FIG. 3 is a diagram for explaining the hub device of the present invention. 3, 101 is an IP unit, 102 is an SNMP agent unit, 103 is an extended MIB MAC address learning table generation unit, 104 is a MAC address management unit, T11 is a MAC address learning table, and T12 is an extended MIBMA.
It is a C address learning table. Although FIG. 3 shows the configuration of the hub device, the basic configuration of the bridge device is the same, and only the processing of the IP unit 101 is different.

In FIG. 3, the IP unit 101 is another LAN.
IP packets are transmitted / received to / from the constituent devices, and the MAC addresses of the transmitted / received IP packets are stored in the MAC address learning table T11. Further, when receiving an instruction to create the extended MIB MAC address learning table T12 from the search device 200, the extended MIB MAC address learning table generation unit 103 is activated, and the information in the MAC address learning table T11 and the MAC address management unit 104 generate the information. Extended MIB by acquiring the MAC address of the LAN component
It is set in the MAC address learning table T12 as an extended MIB.

Then, the SNMP agent unit 102 receives the GE from the SNMP manager unit 207 of the search device 200.
When the T command is received, the information of the extended MIB MAC address learning table T12 is transmitted to the search device 200 as a GET response. FIG. 4 is a diagram for explaining the IP address list table and the MAC address learning list table of the present invention.

FIG. 4A shows an IP address list table T21. The IP address list table T21 is a table in which the entire network is divided into a plurality of segments and the IP addresses of LAN constituent devices accommodated in the segments are registered. FIG. 4B shows the MAC address learning list table T22. The MAC address learning list table T22 is generated by reading the information of the extended MIB MAC address learning table T12 provided in each LAN constituent device, and the IP address, MAC address, port number, and port number of each LAN constituent device. Each time, the MAC address of the LAN constituent device of the other party with whom the communication is performed is registered.

FIG. 5 is a diagram for explaining the extended MIB MAC address learning table. The extended MIB MAC address learning table T12 is provided for each LAN constituent device, and the extended MIB MAC address learning table as attributes, the MAC address of its own device, the port number and the MAC of the LAN constituent device of the other party with which the port communicates. The address is registered.

FIG. 6 shows a flowchart of the IP address list table generation processing according to the first embodiment of this invention. The generation process of the IP address list table T21 will be described below in accordance with the steps of the flowchart (denoted by S in the figure). S101: The IP address list table generation command is input to the search device 200, and the IP address of the LAN configuration device accommodated in the segment number is input.

S102: The command reception unit 201 analyzes the input command and recognizes that it is an IP address list table generation command. S103: The command reception unit 201 activates the IP address list table generation unit 202, and the IP address list table generation unit 202 determines the segment number and the LAN configuration device accommodated in the segment (hereinafter, the LAN configuration device The IP address of the device) is described as the IP address list table T in FIG.
21.

7 and 8 are flowcharts (No. 1 and No. 2) of the MAC address learning table generation process according to the first embodiment of the present invention. S201: A MAC address learning table generation command is input by designating a network address. S202: The command reception unit 201 analyzes the command,
Recognize that it is a MAC address learning list table generation command.

S203: The MAC address learning table pre-collection processing unit 203 extracts the IP address stored corresponding to the designated segment, and the ICPM unit 205 Pin
g Request transmission. The destination address of the Ping request is the IP address stored in the IP address list table T21, and the source address is the IP address of the own device.

S204: The ICPM unit 205 receives the Ping response. S205: Collection processing unit 2 before MAC address learning table
03 is the P of the LAN constituent device whose Ping response was normal.
Extracting the source address in the ing response and expanding MIBM
A generation instruction event of the AC address learning table T12 is generated. S206: An extended MIB MAC address learning table creation instruction is set in the IP packet, and the Ping response is transmitted to the LAN constituent device that was normal.

S207: IP unit 101 of the LAN constituent device
Receives the IP packet, and from the contents of the extended MIBMA
The C address learning table generation unit 103 is activated, and the self L
By referring to the MAC address of the AN constituent device and the MAC address learning table T11, the information is expanded MIBMAC
It is stored in the address learning table T12. (The alphabet in the flowchart follows the same alphabet on the next page.) S208: The IP unit 101 sets the own IP address as the source address and the storage result as the data in the IP packet, and transmits the IP packet.

S209: IP unit 206 of the search device 200
Receives the IP packet, and the MAC address learning table pre-collection processing unit 203 extracts the source address of the IP packet of the LAN constituent device whose reception result is normal. S210: Extended MIB MAC address learning table T1
The storage index value storing 2 is extracted.

S211: The MAC address learning table collection processing unit 204 sends an IP address to the SNMP manager unit 207.
The LAN constituent device, which has received the packet normally, is requested to transmit the GET command in which the storage index value of the extended MIB MAC address learning table T12 is set. S212: SNMP agent unit 1 of LAN constituent device
02 receives the GET command, extracts the information in the extended MIB MAC address learning table T12 from the index value, sets the extracted extended MIB information in the GET response, and transmits it.

S213: The MAC address learning table collection processing unit 204 of the LAN constituent device extracts the source address of the normal GET response and the extended MIB information, and stores them in the corresponding segment of the MAC address learning list table T22. S214: Output completion of storage as a command execution result. The steps shown on the left side in the flowchart show the processing of the search device 200, and the steps shown on the right side show the processing of the hub device 4ij.

9, 10 and 11 are flow charts (No. 1, No. 2 and No. 3) of the MAC address search process according to the first embodiment of the present invention. The MAC address learning list table T22 at the time when the search by the processing of this flowchart is started is created according to the processing of FIGS. S301: A MAC address search command is input by designating the MAC address and segment number.

S302: The command receiving unit 201 analyzes the command and recognizes that it is a MAC address search command. S303: The MAC address search processing unit 208 searches the MAC address learning list table T22 linked to the segment number from the MAC address, and specifies the designated M
The IP address, the MAC address, the port number, and the MAC address accommodated in the port of the LAN constituent device accommodating the AC address are extracted. (The hub device 111 that is not extracted is excluded as a target.) S304: It is determined whether or not the number of extracted LAN constituent devices is one.

S305: The number of extracted LAN constituent devices is 2
If the number is equal to or more than the number, the IP addresses of the extracted LAN constituent devices are extracted. S306: The ICPM unit 205 sets the IP address extracted from the destination address in the Ping request and the source address to its own I
Set to P address and send. S307: Receive a Ping response from the LAN constituent device.

S308: The IP unit 206 sends the extended MIBMA to the LAN constituent device for which the Ping response is normal.
An IP packet instructing the creation of the C address learning table T12 is transmitted. S309: The IP unit 101 of the LAN constituent device receives the IP packet, activates the extended MIB MAC address learning table generation unit 103, and outputs the MAC address of the own LAN constituent device and the information of the MAC address learning table T11 to the MA.
The C address management unit 104 and the MAC address learning table T11 are referred to and stored in the extended MIB MAC address learning table T12.

S310: The IP unit 101 sets the own IP address as the source address and the storage result as the data in the IP packet and transmits the IP packet. S311: The IP unit 206 receives the IP packet,
The C address learning table pre-collection processing unit 203 extracts the source address of the IP packet of the LAN constituent device whose reception result is normal, and the SNMP manager unit 207 sets the GE
Extended MIB MAC address learning table T to T command
The index value of 12 is set and transmitted.

S312: SNMP agent section 102
Receives the GET command, extracts the information of the extended MIB MAC address learning table T12, sets the extracted extended MIB information in the GET response, and transmits it. S313: The SNMP manager unit 207 receives the GET response, and the MAC address learning table collection processing unit 204
Extracts the source address of the normal GET response and the extended MIB information, and stores them in the corresponding segment of the MAC address learning list table T22.

S314: The MAC address of the search device 200 is detected from the MAC address management unit 210. S315: The MAC address registered corresponding to the port number of the first LAN constituent device extracted in S304 is extracted. S316: MAC address of the search device 200 and S315
It is determined whether or not the MAC addresses extracted in step 3 match, and if they match, the next LAN constituent device is set and the process returns to step S315. (If they match, the hub device 121 in FIG. 1 is excluded as a target.) S317: If they do not match, the IP addresses and port numbers of the LAN component devices that do not match are extracted.

S318: It is determined whether all the LAN constituent devices have been completed. S319: If not completed, set the next LAN constituent device and return to S315. S320: It is determined whether or not there is one mismatched LAN constituent device. S321: When there are two or more mismatched LAN constituent devices,
The MAC address of the LAN component device itself is extracted.

S322: IP of LAN constituent device which does not match
The MAC address corresponding to the address and the port number is extracted. S323: S is included in the MAC address extracted in S321.
It is determined whether or not the MAC address of the LAN constituent device that does not match is extracted in 320. (If it exists, the bridge device 100 and the hub devices 110 and 112 of FIG. 1 are excluded from the target.) S324: Extract the next device S326: Extract the IP address and port number of the LAN constituent device that did not exist. To do. (The hub device 112 in FIG. 1 is specified.) S325: The IP address and port number extracted in S324 are output as the command execution result.

When the network address and the MAC address are designated by the processing of the above flow chart, the IP address and port number of the LAN constituent device accommodating the LAN constituent device having the designated MAC address can be searched. FIG. 12 is a diagram for explaining the search device according to the second embodiment of the present invention. The command receiving unit 201 and the IP address list tables T21 and M in FIG.
AC address learning table pre-collection processing unit 203, MAC
Address learning table collection processing unit 204, ICPM unit 2
05, IP section 206, SNMP manager section 207, M
The AC address learning list table T22, the MAC address search processing unit 208, the command output unit 209, and the MAC address management unit 210 have the same configurations as those of the first embodiment of the present invention described in FIG.

In the embodiment of the second invention of FIG. 12, the IP address list table generation unit 202
The IP address list table automatic generation unit 211 is configured. When the IP address list table automatic generation command is input, the IP address list table automatic generation unit 21.
1 broadcasts P to the ICPM unit 205
ping request from the LAN configuration device
IP address list table T21 automatically by g response
The configuration is different from that of the first embodiment in that the IP address list table automatic generation unit 211 is directly connected to the SNMP manager unit 207 and the ICPM unit 205.

FIG. 13 shows a flowchart of the IP address list table automatic generation processing according to the second embodiment of the present invention. S401: An IP address list automatic generation command is input to the search device 200 by designating a segment number. S402: The command receiving unit 201 analyzes the input command and recognizes that it is an IP address list automatic generation command.

S403: The command reception unit 201 activates the IP address list table automatic generation unit 211, and the IP address list table automatic generation unit 211 sets the network address part to all "1". With this setting, L
All LAN constituent devices in the AN are subject to the following processing. S404: The ICPM unit 205 broadcasts the Ping request to the LAN constituent device whose network address is all “1” as the destination address.

S405: The ICPM unit 205 receives the Ping response. S406: IP address list table automatic generation unit 211
Is the Pin of the LAN constituent device whose Ping response was normal.
g Extract the source address in the response and extend MIBMAC
An index value indicating the location where the address learning table T12 is stored is extracted.

S407: The SNMP manager unit 207 sends a GET command in which the storage index value of the extended MIB MAC address learning table T12 is set to the LAN constituent device for which the reception result of the Ping response is normal. S408: The SNMP manager unit 207 receives the GET response. S409: The IP address list table generating unit 211 receives the normal GET response and the extended MIB attribute is the extended MIB.
In the case of the MAC address learning table, the source address in the GET response is stored in the IP address list table T21 as the IP address in the segment.

The IP address list table T21 is generated by the processing of the flow charts of S401 to S409.
MA after the IP address list table T21 is generated
The process of generating the C address learning list table T22 and the search of the MAC address are the same as the process of the flowchart described in the first embodiment of the present invention. (Supplementary Note 1) A method of identifying the installation location of a LAN constituent device to which a MAC address has been assigned, in which a search device that identifies the installation location of the LAN constituent device from the MAC address uses the input segment number and IP of the LAN constituent device. An IP address list table is generated from the addresses, IP packets are sequentially transmitted to all LAN constituent devices registered in the IP address list table, and LAN constituent devices that have normally returned a response to the IP packets are extracted. Instructing the LAN constituent device that has normally returned a response to store in the extended MIB MAC address learning table with the port number and the MAC address in the MAC address learning table as extended MIB information, From the LAN constituent device normally stored in By collecting the information of the BMAC address learning table, the MA of the LAN constituent device in the network
A C address learning list table is generated, the MAC address learning list table is searched, and the installation location of the LAN constituent device having the specified MAC address is specified. Method.

(Supplementary Note 2) A method of identifying the installation location of a LAN constituent device to which a MAC address is assigned, which is a LAN
The search device that identifies the installation location of the component device from the MAC address is all LANs within the entered segment number.
Broadcast IP packets to the components,
All the LANs registered in the IP address list table are automatically generated from the LAN constituent devices that have normally returned a response to the IP packet.
IP packets are sequentially transmitted to the constituent devices, and LAN constituent devices that have normally returned a response to the IP packets are extracted,
For the LAN constituent device that normally returned a response, MA
The expansion MIB information is instructed to be stored in the extended MIB MAC address learning table using the port number and the MAC address in the C address learning table as the extended MIB information.
The LAN normally stored in the AC address learning table
The information of the extended MIB MAC address learning table is collected from the constituent devices to generate the MAC address learning list table of the LAN constituent devices in the network.
A method for identifying the installation location of a LAN constituent device, characterized by searching the AC address learning list table and identifying the installation location of the LAN constituent device having the specified MAC address.

(Supplementary Note 3) A search device for identifying the installation location of a LAN constituent device to which a MAC address has been assigned, the command receiving portion analyzing an input command, and the segment input via the command receiving portion. An IP address list table generation unit that generates an IP address list table from the numbers and the IP addresses of the LAN constituent devices;
In the LAN constituent device registered in the IP address list table, the extended MIBMA is set with the port number and the MAC address in the MAC address learning table as extended MIB information.
The MAC address learning table pre-collection processing unit for instructing the storage in the C address learning table and collecting the storage result, and the information of the extended MIB MAC address learning table of the LAN constituent device that has normally returned a response. ,
A MAC address learning table collection processing unit that generates a MAC address learning list table; and a MAC address search processing unit that searches the MAC address learning list table and identifies the installation location of the LAN constituent device having the specified MAC address. And a search device.

(Supplementary Note 4) In the search device according to Supplementary Note 3, the IP address list table generating unit is configured to operate in the network registered in the IP address list table when the command receiving unit receives the MAC address search command. The search device is configured by an IP address list table automatic generation unit that automatically transmits an IP packet to all the LAN constituent devices of 1) and automatically generates an IP address list table in the network from the response.

[0064]

According to the present invention, when a failure occurs in a LAN constituent device having a certain MAC address, even if the LAN constituent device information is not managed, the failure LA occurs.
From the MAC address of the N configuration device (for example, terminal / server), connect to the IP address of the LAN configuration device (for example, bridge device / hub device) connecting the LAN configuration device (for example, terminal / server) in which a failure has occurred It is possible to easily specify the port number.

Therefore, even if a failure occurs in the LAN constituent device, the failure can be dealt with quickly, and the failure can be terminated in a short time. Furthermore, by mounting the extended MIB MAC address learning table, which is the extended MIB of the present invention, in the LAN configuration device, it becomes possible to easily search for the LAN configuration device that accommodates the MAC address even in a multi-vendor environment.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a system configuration of the present invention.

FIG. 2 is a diagram illustrating a search device according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a hub device of the present invention.

FIG. 4 is an IP address list table and MAC of the present invention.
Figure explaining the address learning list table

FIG. 5 is a diagram illustrating an extended MIB MAC address learning table of the present invention.

FIG. 6 is a flowchart of IP address list table generation processing according to the first embodiment of this invention.

FIG. 7 is a flowchart (No. 1) of the MAC address learning table generation processing according to the first embodiment of this invention.

FIG. 8 is a flowchart (No. 2) of the MAC address learning table generation processing according to the first embodiment of this invention.

FIG. 9 is a flowchart (No. 1) of a MAC address search process according to the first embodiment of the present invention.

FIG. 10 is a MAC according to the first embodiment of the present invention.
Flowchart of address search processing (Part 2)

FIG. 11 is a MAC according to the first embodiment of the present invention.
Flowchart of address search processing (3)

FIG. 12 is a diagram illustrating a search device according to the second embodiment of the present invention.

FIG. 13 is a flowchart of an IP address list table automatic generation process according to the second embodiment of the present invention.

FIG. 14 is a diagram illustrating a system configuration of a conventional technique.

[Explanation of symbols]

100, 400 Bridge devices 110, 111, 112, 120, 121, 410, 4
11, 412, 420, 421 Hub device 101, 206 IP unit 102 SNMP agent unit 103 Extended MIB MAC address learning table generation unit 104, 210 MAC address management unit 200 Search device 201 Command reception unit 202 IP address list table generation unit 203 MAC address Pre-learning table collection processing unit 204 MAC address learning table collection processing unit 205 ICPM unit 207 SNMP manager unit 208 MAC address search processing unit 209 command output unit 211 IP address list table automatic generation unit 300, 310 terminal device 500 management terminal device T11 MAC address learning table T12 Extended MIB MAC address learning table T21 IP address list table T22 MAC address learning list table

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04L 12/56 400 H04L 12/56 400A (72) Inventor Shoji Koji Kita-ku, Yokohama, Kanagawa 3-9 Fujitsu Digital Technology Stock Company In-house (72) Inventor Yoshitaka Kataoka 2-3-3 Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa Fujitsu Digital Technology Stock Company F-term (reference) 5B089 GA31 HA06 JA35 KB04 KB06 5K030 GA11 HA08 HC14 HD09 JT03 5K033 AA06 BA04 DA01 DA16 DB02 EA03 EC03

Claims (3)

[Claims] 1. A method of identifying the installation location of a LAN constituent device to which a MAC address is assigned, wherein a search device that identifies the installation location of the LAN constituent device from the MAC address is An IP address list table is generated from the IP address, and all Ls registered in the IP address list table are generated.
The IP packet is sequentially transmitted to the AN component device, the LAN component device that normally returns a response to the IP packet is extracted, and the LAN component device that normally returns the response is
The port number and the MAC address in the C address learning table are used as the extended MIB information to instruct the storage in the extended MIB MAC address learning table, and the extended MIBMAC is stored in the extended MIB MAC address learning table from the LAN constituent device which is normally stored.
The information of the address learning table is collected to generate the MAC address learning list table of the LAN constituent devices in the network, the MAC address learning list table is searched, and the installation location of the LAN constituent device having the designated MAC address. A method for identifying the installation location of a LAN constituent device, characterized by: 2. A method of identifying the installation location of a LAN constituent device to which a MAC address is assigned, wherein a search device that identifies the installation location of the LAN constituent device from the MAC address is all LANs within the input segment number. An LA that has transmitted an IP packet by broadcast to the constituent device and has normally returned a response to the IP packet.
An IP address list table is automatically generated from N constituent devices, and all Ls registered in the IP address list table are automatically generated.
The IP packet is sequentially transmitted to the AN component device, the LAN component device that normally returns a response to the IP packet is extracted, and the LAN component device that normally returns the response is
The port number and the MAC address in the C address learning table are used as the extended MIB information to instruct the storage in the extended MIB MAC address learning table, and the extended MIBMAC is stored in the extended MIB MAC address learning table from the LAN constituent device which is normally stored.
The information of the address learning table is collected to generate the MAC address learning list table of the LAN constituent devices in the network, the MAC address learning list table is searched, and the installation location of the LAN constituent device having the designated MAC address. A method for identifying the installation location of a LAN constituent device, characterized by: 3. A search device for identifying the installation location of a LAN component device to which a MAC address is assigned, the command receiving part analyzing an input command, and a segment number input via the command receiving part. An IP address list table generation unit that generates an IP address list table from the IP addresses of the LAN constituent devices, and a port number and a MAC address in the MAC address learning table for the LAN constituent devices registered in the IP address list table. Extended MIBMA as information
MAC address learning table pre-collection processing unit for instructing storage in the C address learning table and collecting the storage result, and the extended MI of the LAN constituent device that has normally returned a response.
Collect the MAC address learning table information and
A MAC address learning table collection processing unit that generates a C address learning list table; and a MAC address search processing unit that searches the MAC address learning list table and identifies the installation location of the LAN constituent device having the specified MAC address. A search device characterized by being equipped with.