JP4872107B2 - MAC address writing system, writing control terminal, set device, MAC address assignment method and program - Google Patents

Description

  The present invention relates to a MAC address of a network device, and more particularly to writing a MAC address to each device at the time of manufacturing the network device.

  The MAC address is a unique number assigned to all network devices connected to Ethernet (registered trademark). Based on this, data is transmitted and received between cards. The MAC address is represented by a combination of a number unique to each manufacturer managed and assigned by IEEE and a number uniquely assigned to each card by the manufacturer.

  FIG. 8 is a conceptual diagram showing the configuration of a normal MAC address 401. When IEEE assigns “00-1B-8B” as the vendor ID 402 unique to this manufacturer, this manufacturer can arbitrarily assign the lower 24 bits 403 to the network device that it manufactures. For example, the vendor IDs “00-0D-02” and “00-1B-8B” are assigned by the IEEE Access Technica Co., Ltd., the applicant of the present application, from IEEE.

  That is, this manufacturer has been assigned a MAC address in the range of “00-1B-8B-00-00-00” to “00-1B-8B-FF-FF-FF” by the IEEE. An arbitrary MAC address can be assigned to a network device manufactured by itself. Usually, among the lower 24 bits 403, the first 8 bits are often the model ID 404 and the remaining 16 bits are the serial ID 405 which is the serial number.

  The following documents are known for automatic setting of addresses of network devices. Patent Document 1 discloses a MAC address setting method in which a temporary MAC address is distributed and set to devices to be set, each device is sequentially connected to the network with a temporary MAC address, and a unique MAC address is distributed. Are listed.

  In Patent Document 2, a network address to be set is transmitted from a setting PC by broadcast to a network device, and the network device sets a network address based on its own physical address. However, this operation is based on the assumption that a physical address (= MAC address) has already been set for each network device.

  Patent Document 3 describes a method for suppressing the occurrence of collision in the transmission of real-time data.

JP 2006-246223 A JP 2000-269999 A JP 2005-124206 A

  In the manufacturing process of network devices, there is an operation of writing a unique MAC address for each manufactured device. Due to the nature of the MAC address, it is impossible to write a common value for a plurality of devices. Conventionally, this writing process requires manual work, and it has been difficult to automate this process.

  Furthermore, since it is necessary to manage unused MAC addresses and assigned MAC addresses within the range of assigned MAC addresses, duplicate MAC addresses can be written to network devices by human work. I cannot deny sex. A network device in which a duplicate MAC address is written cannot connect to Ethernet (registered trademark) and function normally. Not only that, the entire connected network will be adversely affected, such as equipment damage and communication failures. For this reason, the repair work which reassigns a MAC address by human work, and the cost accompanying this occur.

  The setting method of Patent Document 1 requires means for sequentially connecting each device to which a temporary MAC address is distributed to the network using the temporary MAC address, and a plurality of servers for managing the connection and setting, for example, a DHCP server And a connection management server are required. Therefore, the cost for implementation is large. Since Patent Documents 2 and 3 are not intended to set a MAC address, the combination with Patent Document 1 does not solve the above problem.

  An object of the present invention is to provide a MAC address writing system, a write control terminal, a write target device, and a MAC address assignment method capable of assigning and writing a unique MAC address to each manufactured device in the manufacturing process of the network device. And to provide a program.

  In order to achieve the above object, a MAC address writing system according to the present invention includes a MAC address configured by connecting a write control terminal and n set devices to be MAC address setting targets to each other via a network. The write control terminal transmits a first broadcast frame including a first MAC address to the network, and the other device to be set is about to set the first MAC address. It is characterized by setting the first MAC address to itself after confirming that the device does not exist.

  In order to achieve the above object, a write control terminal according to the present invention is a write control terminal connected to n set devices to be MAC address set by a network and attempts to write to the set device. A user interface unit that receives an input of a first MAC address that is an initial value of a MAC address to be transmitted, a frame generation unit that generates a first broadcast frame including the first MAC address, and a first broadcast frame to the network And a frame transmission unit that transmits the frame.

  In order to achieve the above object, a device to be set according to the present invention is a device to be set for MAC address setting, which is connected to a write control terminal and another device to be set by a network, and has a MAC address. , A frame determination unit that detects that the first broadcast frame including the first MAC address has been received from the write control terminal, and a device to be set that is to be set with the first MAC address. When it is confirmed that there is no control unit for confirming that there is no other setting device and another device to be set for setting the first MAC address, the first MAC address is written to the EEPROM. And a MAC address writing unit.

  In order to achieve the above object, a MAC address assignment method according to the present invention is a MAC address writing system configured such that a write control terminal and n set devices are connected to each other via a network. The write control terminal transmits a first broadcast frame including the first MAC address to the network, and the set device assigns the first MAC address to the set device. When it is confirmed that there is no other device to be set to be set, and the device to be set confirms that there is no other device to be set to set the first MAC address, 1 MAC address is set.

  In order to achieve the above object, a MAC address assignment program according to the present invention provides a set device to a computer constituting a write control terminal connected to n set devices to be MAC address set and a network. Processing for accepting an input of a first MAC address that is an initial value of the MAC address to be written to, processing for generating a first broadcast frame including the first MAC address, and sending the first broadcast frame to the network And the process of transmitting.

In order to achieve the above object, another MAC address assignment program according to the present invention controls a set device having an EEPROM for storing a MAC address, which is mutually connected by a network with a write control terminal and another set device. A process for detecting that the computer has received the first broadcast frame including the first MAC address from the write control terminal, and the other set device to which the set device is trying to set the first MAC address A process for confirming that the first MAC address does not exist, and a process for writing the first MAC address to the EEPROM when it is confirmed that there is no other device to be configured to set the first MAC address. It is characterized by .

  The present invention is configured to set the MAC address after confirming that there is no other configured device that the configured device intends to set the same MAC address as itself. , It can be set collectively for a plurality of set devices. Thereby, in the manufacturing process of the network device, a unique MAC address writing system, a writing control terminal, a writing target device, which can assign and write a unique MAC address to each manufactured device, A MAC address assignment method and program can be provided.

[First Embodiment]
FIG. 1 is a conceptual diagram showing a configuration of a MAC address writing system 1 according to the first embodiment of the present invention. The MAC address writing system 1 is configured by connecting a write control terminal 10 and n set devices 11 that are network devices for MAC address setting to each other via an Ethernet (registered trademark) 13. n is an integer of 2 or more.

  The first broadcast frame 12a including the first MAC address is transmitted from the write control terminal 10 to the Ethernet (registered trademark) 13, and the first device to be set 11a having received the first broadcast frame 12a receives the first MAC address. The second broadcast frame 12b including the second MAC address is set to itself and transmitted to the Ethernet (registered trademark) 13. Receiving this, the second device to be set 11b sets the second MAC address to itself, and transmits the third broadcast frame 12c including the second MAC address to the Ethernet (registered trademark) 13. Thereafter, the same operation is repeated for all the set devices 11. Details of this operation will be described later.

  FIG. 2 is a functional block diagram showing an internal configuration of the write control terminal 10 shown in FIG. The write control terminal 10 is a general computer device. The operations described below can be provided as a program that runs on this computer apparatus.

  The write control terminal 10 displays a frame reception unit 21 that receives a frame from the Ethernet (registered trademark) 13, a frame determination unit 22 that determines what the content of the received frame is, and displays the processing result to the user. Also, based on a user interface unit 24 that receives an operation from the user, a control unit 23 that performs processing such as generation of a new frame based on the content of the received frame and an operation from the user, and an instruction from the control unit The frame generation unit 25 generates a frame, and the frame transmission unit 26 transmits the generated frame to the Ethernet (registered trademark) 13.

  FIG. 3 is a functional block diagram showing an internal configuration of the device 11 to be set shown in FIG. The device to be set 11 is a network device controlled by a built-in microcomputer (not shown). The operations described below can be provided as a program that operates on this microcomputer device.

  The set device 11 includes a frame receiving unit 31 that receives a frame from the Ethernet (registered trademark) 13, a frame determination unit 32 that determines what the content of the received frame is, and the content of the received frame. A control unit 33 that performs processing such as setting of a MAC address and generation of a new frame, a MAC address writing unit 34 that performs setting of MAC address setting based on an instruction from the control unit, and an instruction from the control unit The frame generation unit 35 generates a frame, the frame transmission unit 36 transmits the generated frame to the Ethernet (registered trademark) 13, and the EEPROM 37 into which the MAC address writing unit 34 writes the MAC address.

  FIG. 4 is a conceptual diagram showing a data configuration of the broadcast frame 12 shown in FIG. 1 that is transmitted from the write control terminal 10 and the set device 11 to the Ethernet (registered trademark) 13 in the present embodiment. The broadcast frame 12 is based on the known Ethernet (registered trademark) version 2 (IEEE 802.3) specification.

  The destination MAC address 51 is “FF-FF-FF-FF-FF-FF” representing a broadcast frame. The source MAC address 52 can take an arbitrary value. In the present embodiment, the device to be set 11 in which its own MAC address is not set may transmit the broadcast frame 12, and in this case, the source MAC address 52 may be an arbitrary value.

  The data type 53 uses an identification code unique to the present embodiment, for example, “FF-FF”. A frame whose data type 53 is not a code specific to the present embodiment is ignored in the operation of the present embodiment. The data 54 includes a MAC address 56 to be set. The CRC 55 is known error check data.

  As described above, in the MAC address 56, the upper 24 bits are the vendor ID 41, the subsequent 8 bits are the model ID 42, and the lower 16 bits are the serial ID 43 which is a serial number. Here, it is assumed that the vendor ID 41 is “00-1B-8B”, the model ID 42 is “01”, and serial numbers starting with the serial ID 43 “00-00” are assigned to the n set devices 11.

The first MAC address 56a “00-1B-8B-01-00-00” is assigned to the first device to be set 11a. The second MAC address 56b “00-1B-8B-01-00-01” is assigned to the second device to be set 11b. Thereafter, similarly, the n-th MAC address 56n “00-1B-8B-01-00-0n ^* ” is assigned to the n-th set device 11n. Here, n ^* = n−1.

  In the following description, a MAC address to be assigned to the nth device to be set 11n is referred to as an nth MAC address 56n, and a broadcast frame including the nth MAC address 56n is referred to as an nth broadcast frame 12n.

  FIG. 5 is a flowchart showing processing executed by the write control terminal 10 shown in FIG. Based on a user operation from the user interface unit 24, the control unit 23 sets a range in which MAC addresses are assigned to n set devices 11 and sets a first MAC address 56a that is the head of this address range. (Step S101). Subsequently, the first broadcast frame 12a including the first MAC address 56a is transmitted to the frame generation unit 25 (step S102).

  After that, while waiting for a certain time, whether or not the broadcast frame 12 that each set device 11 sends to the Ethernet (registered trademark) 13 is the (n + 1) th broadcast frame 12n + 1 including the (n + 1) th MAC address 56n + 1. Is determined (step S103). If the (n + 1) th broadcast frame 12n + 1 is detected within the waiting time, the setting of the MAC address has been completed for all n set devices 11. At this time, the range of the first MAC address 56a to the nth MAC address 56n is the assigned MAC address.

  FIG. 6 is a flowchart showing processing executed by each of the set devices 11 shown in FIG. When the frame determination unit 32 detects that the i-th broadcast frame 12i including the i-th MAC address 56i is received (step S201), the control unit 33 includes the i + 1-th MAC address 56i + 1 in the frame generation unit 35. The i + 1th broadcast frame 12i + 1 is transmitted (step S202). Note that i is a natural number and i ≦ n.

  Here, if there is an object that transmits the broadcast frame 12i + 1 (to set the i-th MAC address 56i) in the device 11 to be set connected to the same Ethernet (registered trademark) 13, a collision occurs. The presence or absence of collision is confirmed, and if there is no collision (step S203: NO), it means that there is no other device to be set 11 that is going to set the i-th MAC address 56i. The address writing unit 34 is instructed to write the i-th MAC address 56i, and the MAC address writing unit 34 writes the i-th MAC address 56i in the EEPROM 37 accordingly (step S204). Thereafter, all broadcast frames 12 sent to the device to be set 11 are ignored.

  If a collision is detected in step S203, the process proceeds to a retransmission timeout process based on the Ethernet (registered trademark) version 2 specification. If a retransmission timeout occurs (step S205: YES), the process returns to step S202 to retransmit the i + 1-th broadcast frame 12i + 1. If the retransmission timeout does not occur and the i + 1th broadcast frame 12i + 1 is received from the other set device 11 (step S206: YES), the retransmission of the i + 1th broadcast frame 12i + 1 is stopped (step S207), and the step The process returns to S201 and waits for reception of a broadcast frame having a larger i value from the other set target device 11.

  By this operation, the set device 11 can set the i-th MAC address 56i after confirming that there is no other set-up device 11 that is going to set the i-th MAC address 56i. It is possible to write MAC addresses that do not overlap between the setting devices 11.

  In addition, this process can be collectively performed for a plurality of set devices 11 by connecting the write control terminal 10 and the set device 11 to the Ethernet (registered trademark) 13. Therefore, it is possible to greatly reduce the human work related to the writing work. In addition, unlike the technique described in Patent Document 1, the write control terminal 10 can be easily realized by one ordinary personal computer that can be connected to the Ethernet (registered trademark) 13. Therefore, the implementation cost can be reduced.

[Second Embodiment]
The configuration of the MAC address writing system 1 according to the second embodiment of the present invention, and the configuration of the write control terminal 10 and the device to be set 11 are the same as those in the first embodiment, and the description thereof will be omitted.

  FIG. 7 is a conceptual diagram showing a data configuration of the broadcast frame 12 that the write control terminal 10 and the set target device 11 transmit to the Ethernet (registered trademark) 13 in the present embodiment. In the present embodiment, the data 324 of the broadcast frame 12 includes a MAC address 326 to be set and an offset value 327.

  For example, when the offset value 327 = “2”, the first MAC address 326a is “00-1B-8B-01-00-00”, but the second MAC address 326b is from the first MAC address 326a. It becomes “00-1B-8B-01-00-02” shifted by a value designated as the offset value 327 (here, “2”). Thereafter, similarly, the n-th MAC address 326n becomes “00-1B-8B-01-00-0N”. Here, N = 2 × (n−1).

  Since the other data structure of the broadcast frame 12 is the same as that shown in FIG. 4, the same type of data is referred to by the same reference number and name, and the description is omitted. The operations of the write control terminal 10 and the device to be set 11 are the same as those in the first embodiment except for the MAC address determination method, and thus the description thereof is omitted.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

  It can be used in the manufacture of network devices, particularly network devices connected to Ethernet (registered trademark).

It is a conceptual diagram which shows the structure of the MAC address writing system which concerns on the 1st Embodiment of this invention. It is a functional block diagram which shows the structure inside the write-control terminal shown in FIG. It is a functional block diagram which shows the structure inside a to-be-set apparatus shown in FIG. FIG. 2 is a conceptual diagram showing a data structure of a broadcast frame shown in FIG. 1 that is transmitted to an Ethernet (registered trademark) by a write control terminal and a set device in the present embodiment. It is a flowchart showing the process which the writing control terminal shown in FIG. 2 performs. It is a flowchart showing the process which each to-be-set device shown in FIG. 3 performs. It is a conceptual diagram which shows the data structure of the broadcast frame which a write control terminal and a to-be-configured apparatus transmit to Ethernet (trademark) in the 2nd Embodiment of this invention. It is a conceptual diagram which shows the structure of a normal MAC address.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 MAC address writing system 10 Write control terminal 11, 11a, 11b, 11c, 11n Device to be set 12, 12a, 12b, 12c, 12i, 12i + 1, 12n, 12n + 1 Broadcast frame 13 Ethernet (trademark)
21 Frame receiving unit 22 Frame determining unit 23 Control unit 24 User interface unit 25 Frame generating unit 26 Frame transmitting unit 31 Frame receiving unit 32 Frame determining unit 33 Control unit 34 MAC address writing unit 35 Frame generating unit 36 Frame transmitting unit 37 EEPROM
41 Vendor ID
42 Model ID
43 Serial ID
51 Destination MAC address 52 Source MAC address 53 Data type 54 Data 55 CRC
56, 56a, 56b, 56c, 56i, 56i + 1, 56n MAC address 324 Data 325 CRC
326, 326a, 326b MAC address 327 Offset value

Claims (13)

A MAC address writing system in which a write control terminal and n set devices to be MAC address setting targets are connected to each other via a network,
The write control terminal transmits a first broadcast frame including a first MAC address to the network;
The set device sets the first MAC address to itself after confirming that there is no other set device to which the first MAC address is to be set. Writing system.   If the set device receives the first broadcast frame, it transmits a second broadcast frame including a second MAC address to the network, and if a collision occurs in the transmission of the second broadcast frame. 2. The MAC address writing system according to claim 1, wherein it is determined that there is another device to be set that is going to set the first MAC address.   3. The MAC according to claim 2, wherein, when a collision occurs during transmission of the second broadcast frame, the configured device retransmits the second broadcast frame if a retransmission timeout occurs. 4. Address writing system.   When a collision occurs in the transmission of the second broadcast frame, the set-up device does not generate a retransmission timeout and receives the second broadcast frame from another set-up device. 3. The MAC address writing system according to claim 2, wherein retransmission of the second broadcast frame is stopped.   When the write control terminal receives the (n + 1) th broadcast frame including the (n + 1) th MAC address from the network, it is determined that the setting of the MAC addresses of all n configured devices is completed. The MAC address writing system according to claim 2.   The MAC address writing system according to claim 2, wherein the second MAC address is obtained by incrementing the first MAC address by one.   The first and second broadcast frames include an offset value in addition to a MAC address, and the second MAC address is obtained by increasing the first MAC address by the offset value. The MAC address writing system according to claim 2.   3. The MAC address writing system according to claim 2, wherein the first and second broadcast frames include an identification code representing a data type specific to the MAC address writing system. A write control terminal that is connected to each other by a network with n devices to be set for MAC address setting,
A user interface unit that receives an input of a first MAC address that is an initial value of a MAC address to be written to the set device;
A frame generation unit for generating a first broadcast frame including the first MAC address;
A write control terminal comprising: a frame transmission unit configured to transmit the first broadcast frame to the network. A device to be set that is a target of MAC address setting, mutually connected by a network with a write control terminal and another device to be set,
An EEPROM for storing the MAC address;
A frame determination unit for detecting that a first broadcast frame including a first MAC address is received from the write control terminal;
A control unit for confirming that there is no other device to be set in which the device to be set is going to set the first MAC address;
A MAC address writing unit that writes the first MAC address to the EEPROM when it is confirmed that there is no other device to be set for setting the first MAC address. Device to be set. A MAC address writing system configured by connecting a write control terminal and n set devices to each other via a network, and assigning a MAC address to each of the set devices,
The write control terminal transmits a first broadcast frame including a first MAC address to the network;
The set device confirms that there is no other set device for which the first MAC address is to be set,
The MAC is configured to set the first MAC address to itself when the set device confirms that there is no other set device to which the first MAC address is to be set. Address assignment method. To a computer that constitutes a write control terminal that is interconnected by a network with n devices to be set for MAC address setting,
A process of receiving an input of a first MAC address that is an initial value of a MAC address to be written to the set device;
Generating a first broadcast frame including the first MAC address;
A program for executing a process of transmitting the first broadcast frame to the network. To a computer that controls a set device having an EEPROM that stores a MAC address that is interconnected by a network with a write control terminal and other set devices,
A process of detecting the reception of a first broadcast frame including a first MAC address from the write control terminal;
A process for confirming that the other device to be set for which the device to be set is trying to set the first MAC address does not exist;
A process of writing the first MAC address to the EEPROM when it is confirmed that there is no other device to be set to set the first MAC address. Program to do.

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