JP2009232422A - Network system, network equipment, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable network equipment to be controlled by an OAM by allocating MAC address to the network equipment. <P>SOLUTION: In a network system provided with a master switch 1 and a slave switch 11 connected to the master switch 1, the master switch 1 is provided with a master-side use address setting part 102 for setting the use MAC address nx1 which is the MAC address given to the slave switch 11, a use address transmitting part 105 for transmitting the use MAC address nx1 toward an initial MAC address n1 being an address showing the slave switch 11, and a master-side initial address setting pare 104 for setting the initial MAC address n1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to the management of network equipment such as switches, eg switching hubs or routers.

  Conventionally, it is known to test a network device such as a switch via a network (see, for example, Patent Document 1 and Patent Document 2).

SNMP (Simple
If the Network Management Protocol is implemented, the switch can be managed via the network. However, since SNMP is not implemented in an inexpensive dumb switch, the setting cannot be changed via the network, and it is difficult to manage at low cost.

Therefore, cheap dam switches etc.
Management by Maintenance and Maintenance) is considered. The OAM is for managing Ethernet (registered trademark). Ethernet (registered trademark) corresponds to layer 2 of an OSI (Open Systems Interconnection) reference model. Therefore, in OAM, switches and the like are managed in association with MAC (Media Access Control) addresses, which are layer 2 addresses.

JP 2004-364065 A JP 2002-359663 A

  Therefore, it is necessary to assign a MAC address to the switch to be managed.

  Accordingly, an object of the present invention is to assign a MAC address to a network device so that it can be managed by OAM.

  A network system according to the present invention is a network system including a first network device and a second network device connected to the first network device, wherein the first network device is connected to the second network device. First used MAC address setting means for setting a used MAC address that is a MAC address to be assigned, and used MAC address transmitting means for transmitting the used MAC address toward an initial MAC address that is an address indicating the second network device And a first initial MAC address setting means for setting the initial MAC address, wherein the second network device sets the initial MAC address as an address indicating the second network device. A MAC address transmitted by the setting means and the MAC address transmitting means. The second MAC device is set as an address indicating the second network device to be used for communication between the first network device and the second network device after transmission by the used MAC address transmission means. Using MAC address setting means.

  The network system configured as described above includes a first network device and a second network device connected to the first network device.

  In the first network device, first use MAC address setting means sets a use MAC address that is a MAC address to be given to the second network device. The used MAC address transmitting means transmits the used MAC address toward an initial MAC address that is an address indicating the second network device. First initial MAC address setting means sets the initial MAC address.

  In the second network device, second initial MAC address setting means sets the initial MAC address as an address indicating the second network device. Second used MAC address setting means receives the used MAC address transmitted by the used MAC address transmitting means, and the used MAC address is transmitted to the first network device after transmission by the used MAC address transmitting means and the first It is set as an address indicating the second network device used for communication with the second network device.

Further, in the network system according to the present invention, the second network device transmits a setting completion transmitting unit that transmits to the first network device that the second used MAC address setting unit has completed setting the used MAC address. The first network device comprises:
When the first network device receives a transmission from the setting completion transmission unit, it may include a setting cancellation unit that cancels the setting of the initial MAC address.

  In the network system according to the present invention, the first network device includes first address recording means for recording the used MAC address and the initial MAC address, and the second network device includes the used MAC address and the used MAC address. Second address recording means for recording the initial MAC address may be provided.

  In the network system according to the present invention, the second network device may include status transmission means for transmitting the status of the second network device and the used MAC address to the first network device.

  In the network system according to the present invention, the first network device includes a read instruction transmitting unit that transmits a read instruction of data recorded in the data recorder of the second network device toward the MAC address used. The second network device reads the data recorded in the data recorder when the second network device receives the read instruction transmitted by the read instruction transmitting means, and You may make it provide the read data transmission means transmitted to a network apparatus.

  Further, the network system according to the present invention comprises a write instruction transmitting means for transmitting an instruction for the first network device to write data to the data recorder of the second network device toward the MAC address used, The second network device includes data writing means for writing the data to the data recorder when the second network device receives the writing instruction transmitted by the writing instruction transmitting means. Also good.

  In the network system according to the present invention, the first network device and the second network device may be a switching hub or a router.

  The first network device according to the present invention is a first network device to which a second network device is connected, and a first used MAC address setting that sets a used MAC address that is a MAC address assigned to the second network device. Means, a used MAC address transmitting means for transmitting the used MAC address toward an initial MAC address that is an address indicating the second network device, and a first initial MAC address setting means for setting the initial MAC address. Configured to provide.

  According to the first network device configured as described above and connected to the second network device, the first used MAC address setting means sets the used MAC address that is the MAC address to be given to the second network device. . The used MAC address transmitting means transmits the used MAC address toward an initial MAC address that is an address indicating the second network device. First initial MAC address setting means sets the initial MAC address.

  Further, the first network device according to the present invention is used for communication between the first network device and the second network device after transmitting the used MAC address from the second network device by the used MAC address transmitting means. When the first network device receives communication indicating that setting as an address indicating the second network device is used, a setting cancellation unit that cancels the setting of the initial MAC address may be provided. Good.

  The first network device according to the present invention may include first address recording means for recording the used MAC address and the initial MAC address.

  In addition, the first network device according to the present invention may include a read instruction transmission unit that transmits a read instruction of data recorded in the data recorder of the second network device toward the MAC address used. Good.

  In addition, the first network device according to the present invention may include a write instruction transmission unit that transmits an instruction to write data to the data recorder of the second network device toward the MAC address used.

  In the first network device according to the present invention, the first network device may be a switching hub or a router.

  A second network device according to the present invention is a second network device connected to the first network device, wherein a second initial MAC address setting means for setting an initial MAC address indicating the second network device; Receiving a used MAC address transmitted from one network device, and using the used MAC address for communication between the first network device and the second network device after transmission of the used MAC address by the first network device; Second-use MAC address setting means for setting as an address indicating the second network device.

  According to the second network device configured as described above and connected to the first network device, the second initial MAC address setting means sets an initial MAC address indicating the second network device. The second used MAC address setting means receives the used MAC address transmitted from the first network device, and the used MAC address is the first network device after transmission of the used MAC address by the first network device. An address indicating the second network device used for communication with the second network device is set.

  Further, the second network device according to the present invention comprises a setting completion transmission means for transmitting to the first network device that the second used MAC address setting means has completed the setting of the used MAC address. Also good.

  Further, the second network device according to the present invention may comprise second address recording means for recording the used MAC address and the initial MAC address.

  The second network device according to the present invention may further include a status transmission unit that transmits the status of the second network device and the used MAC address to the first network device.

  In the second network device according to the present invention, the second network device may be a switching hub or a router.

  The present invention is a program for causing a computer to execute information processing in a first network device to which a second network device is connected, wherein the information processing is a MAC address that is a MAC address assigned to the second network device A first used MAC address setting step for setting an address; a used MAC address transmitting step for transmitting the used MAC address toward an initial MAC address that is an address indicating the second network device; and the initial MAC address is set. A first initial MAC address setting step.

  The present invention is a program for causing a computer to execute information processing in a second network device connected to a first network device, wherein the information processing sets a first MAC address indicating the second network device. Two initial MAC address setting step, receiving the used MAC address transmitted from the first network device, the used MAC address, the first network device after transmission of the used MAC address by the first network device and the A second use MAC address setting step for setting an address indicating the second network device used for communication with the second network device.

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

  FIG. 1 is a diagram showing a configuration of a network system 10 according to an embodiment of the present invention. The network system 10 includes a master switch (first network device) 1 and slave switches (second network devices) 11, 12, and 13.

  The master switch (first network device) 1 and slave switches (second network devices) 11, 12, and 13 are switches, and may be, for example, a switching hub or a router. Therefore, the master switch 1 and the slave switches 11, 12, and 13 are connected to various network devices (not shown) such as a personal computer. Note that the slave switches 11, 12, and 13 do not have to be assigned MAC addresses at the time of shipment.

  The master switch 1 includes a CPU port (port connected to the CPU inside the master switch 1) P0 and slave connection ports Px1, Px2, and Px3. The master switch 1 also has other ports, which are not shown. Slave switches 11, 12, and 13 are connected to the slave connection ports Px1, Px2, and Px3, respectively.

  The slave switches 11, 12, and 13 include CPU ports P01, P02, and P03 (ports connected to CPUs inside the slave switches 11, 12, and 13), respectively. The slave switches 11, 12, and 13 also have other ports, but are not shown. The CPU ports P01, P02, and P03 are connected to the slave connection ports Px1, Px2, and Px3, respectively.

  The CPU ports P01, P02, and P03 and the slave connection ports Px1, Px2, and Px3 may be connected by a normal communication cable or may be connected by a network.

First Embodiment FIG. 2 is a functional block diagram showing a configuration of a master switch 1 according to the first embodiment. However, FIG. 2 illustrates a state in which a slave switch (second network device) 11 is connected to the master switch (first network device) 1.

  The master switch 1 includes a master side FDB recording unit (first address recording unit) 100, a CPU port address setting unit 101, a master side use address setting unit (first use MAC address setting unit) 102, a link detection unit 103, and a master side. An initial address setting unit (first initial MAC address setting unit) 104, a used address transmission unit (used MAC address transmission unit) 105, a setting release unit 106, and slave connection ports Px1, Px2, and Px3 are provided.

  The master side FDB recording unit (first address recording means) 100 records a used MAC address and an initial MAC address, which will be described later. Refer to FIG. 5A, FIG. 6A, FIG. 8A, and FIG. 10A for specific examples of recorded contents. The master side FDB recording unit 100 is an FDB (Forwarding Data Base). Various information other than the used MAC address and the initial MAC address is recorded in the FDB, but since it is not directly related to the embodiment of the present invention, illustration and description are omitted.

  The CPU port address setting unit 101 sets the MAC (Media Access Control) address of the CPU port P0 of the master switch 1. Note that “setting” means writing to the master-side FDB recording unit 100. The MAC address of the CPU port P0 is “n0”, for example.

  The master side use address setting unit (first use MAC address setting means) 102 sets a use MAC address that is a MAC address to be given to the slave switches 11, 12, and 13. That is, the used MAC address is written in the master side FDB recording unit 100. For example, the MAC address used by the slave switch 11 is “nx1”, the MAC address used by the slave switch 12 is “nx2”, and the MAC address used by the slave switch 13 is “nx3”. In FIG. 2, since the use MAC address to be given to the slave switch 11 is set, the use MAC address is “nx1”.

  The link detection unit 103 detects that the slave switches 11, 12, and 13 are newly connected to any of the slave connection ports Px1, Px2, and Px3 (link up). In FIG. 2, it is detected that the slave switch 11 is connected to the slave connection port Px1.

  The master-side initial address setting unit (first initial MAC address setting unit) 104 receives the detection of link-up from the link detection unit 103, and sets an initial MAC address to be described later. That is, the initial MAC address is written in the master side FDB recording unit 100. For example, the initial MAC addresses of the slave switches 11, 12, and 13 are “n1”. In FIG. 2, since the initial MAC address of the slave switch 11 is set, the initial MAC address is “n1”.

  Note that the master side initial address setting unit 104 may operate when a link up is detected as described above. However, other operations may be performed when the master-side initial address setting unit 104 receives an instruction to perform setting from a management device (not shown) (connected to the master switch 1).

  The used address transmitting unit (used MAC address transmitting means) 105 transmits the used MAC address toward the initial MAC address that is an address indicating the slave switches 11, 12, and 13. The transmission contents (see FIG. 7) are transmitted to the slave switch 11 via the slave connection port Px1.

  When the master switch 1 receives a transmission from a setting completion transmission unit 116 (to be described later) of the slave switch 11 (the transmission from the setting completion transmission unit 116 is received via the slave connection port Px1). Release the initial MAC address setting. Specifically, the setting cancellation unit 106 deletes the initial MAC address written in the master side FDB recording unit 100.

  FIG. 3 is a functional block diagram showing the configuration of the slave switch 11 according to the first embodiment. The slave switches 12 and 13 have the same configuration. The slave switch 11 includes a slave side initial address setting unit (second initial MAC address setting unit) 111, a slave side FDB recording unit (second address recording unit) 112, and a slave side use address setting unit (second use MAC address setting unit). ) 114, a setting completion transmission unit 116, and a CPU port P01.

  The slave side FDB recording unit (second address recording means) 112 records the used MAC address and the initial MAC address. Refer to FIG. 5B, FIG. 6B, FIG. 8B, and FIG. 10B for specific examples of recorded contents. Note that the slave-side FDB recording unit 112 is an FDB (Forwarding Data Base). Various information other than the used MAC address and the initial MAC address is recorded in the FDB, but since it is not directly related to the embodiment of the present invention, illustration and description are omitted.

  The slave side initial address setting unit (second initial MAC address setting unit) 111 sets the initial MAC address (“n1” in the example of FIG. 3) as the MAC address indicating the slave switch 11. That is, the slave side initial address setting unit 111 writes the initial MAC address in the slave side FDB recording unit 112.

  The slave side use address setting unit (second use MAC address setting means) 114 is a use MAC address (“nx1” in the examples of FIGS. 2 and 3) transmitted by the use address transmission unit 105 of the master switch 1 (transmission). The contents are received through the CPU port P01. Further, the slave side use address setting unit 114 is a MAC address indicating the slave switch 11 used for communication between the master switch 1 and the slave switch 11 (however, communication performed after the use MAC address is transmitted by the use address transmission unit 105). Set the MAC address used. That is, the slave side use address setting unit 114 writes the use MAC address to the slave side FDB recording unit 112.

  The setting completion transmission unit 116 refers to the recorded contents of the slave-side FDB recording unit 112 and detects that the setting of the used MAC address is completed (writing of the used MAC address is completed). Further, the setting completion transmission unit 116 transmits the completion of the setting of the used MAC address to the master switch 1 via the CPU port P01 (see FIG. 9 for transmission contents).

  Next, the operation of the first embodiment will be described.

  First, the operation when the CPU port P01 of the slave switch 11 is connected to the slave connection port Px1 of the master switch 1 will be described.

  FIG. 4 is a flowchart showing the operation of the first embodiment.

  First, the CPU port address setting unit 101 of the master switch 1 sets the MAC address n0 of the CPU port P0 of the master switch 1 (writes to the master side FDB recording unit 100), and the master side use address setting unit 102 sets the slave switch 11's MAC address n0. The used MAC address nx1 is set (written to the master side FDB recording unit 100) (S10).

  In parallel with the setting of the CPU port address and the use address (S10), the slave-side initial address setting unit 111 of the slave switch 11 sets the initial MAC address n1 of the slave switch 11 (writes to the slave-side FDB recording unit 112). (S20).

  FIG. 5 shows the recording contents of the master side FDB recording unit 100 in the setting of the CPU port address and the use address (S10) (FIG. 5A), and the recording contents of the slave side FDB recording unit 112 in the setting of the initial address (S20). It is a figure which shows (FIG.5 (b)).

  Referring to FIG. 5A, n0 is recorded as the MAC address of CPU port P0, and MAC address nx1 is recorded in master side FDB recording unit 100 in association with slave connection port Px1 to which slave switch 11 is connected. Yes.

  Referring to FIG. 5B, the MAC address n1 is recorded in association with the CPU port P01 of the slave switch 11.

  Next, when the link detection unit 103 detects that the slave switch 11 is connected to the slave connection port Px1 of the master switch 1 (link up), the master side initial address setting unit 104 sets the initial MAC address n1. (Write to the slave side FDB recording unit 112) (S12).

  6 shows the recording contents of the master-side FDB recording unit 100 in the initial address setting (S12) (FIG. 6A), and the recording contents of the slave-side FDB recording unit 112 in the initial address setting (S12) (FIG. It is a figure which shows b)).

  Referring to FIG. 6A, the MAC address n1 is newly recorded in the master side FDB recording unit 100 in association with the slave connection port Px1 to which the slave switch 11 is connected. As shown in FIG. 6A, when a plurality of MAC addresses are recorded in the same port Px1, the newly recorded one is preferentially used for communication.

  FIG. 6B shows the same contents as FIG.

  Next, the used address transmission unit 105 refers to the recorded contents of the master side FDB recording unit 100 and transmits the used MAC address nx1 toward the initial MAC address n1. Specifically, the frame F1 describing the used MAC address nx1 is transmitted to the slave switch 11.

  FIG. 7 is a diagram illustrating the configuration of the frame F1 transmitted by the used address transmission unit 105. The frame F1 has fields F11, F12, F13, and F14.

  A field F11 defines a DA (Destination Address) and describes a destination MAC address. The MAC addresses nx1 and n1 are recorded in the master side FDB recording unit 100 in association with the slave connection port Px1, but the newly recorded MAC address n1 (initial MAC address) is preferentially used. Therefore, DA is n1.

  Field F12 defines SA (Source Address) and describes the MAC address of the transmission source. The MAC address n0 of the CPU port P0 is used as the MAC address of the master switch 1 that is the transmission source.

  A field F13 is a field for describing PAYLOAD, and describes a used MAC address nx1.

  Field F14 describes FCS (Frame Check Sequence). FCS is a type of data for error detection.

  The frame F1 transmitted by the used address transmitting unit 105 is received by the slave side used address setting unit 114 of the slave switch 11 via the CPU port P0 (S24).

  The DA of the frame F1 is n1, and the MAC address of the CPU port P01 recorded in the slave side FDB recording unit 112 of the slave switch 11 is also n1. Therefore, the slave switch 11 can recognize that the frame F1 is a frame transmitted toward the CPU port P01 of the slave switch 11.

  Next, the slave side use address setting unit 114 sets the use MAC address nx1 as the MAC address indicating the slave switch 11 to be used for future communication between the master switch 1 and the slave switch 11 (S25). That is, the slave side use address setting unit 114 writes the use MAC address to the slave side FDB recording unit 112.

  FIG. 8 shows the recording contents of the master side FDB recording unit 100 (FIG. 8 (a)) in the setting of use addresses (S25), and the recording contents of the slave side FDB recording unit 112 in the setting of use addresses (S25) (FIG. It is a figure which shows b)).

  FIG. 8A shows the same contents as FIG.

  With reference to FIG. 8B, the MAC address nx1 is newly recorded in the slave-side FDB recording unit 112 in association with the slave connection port Px1 to which the slave switch 11 is connected. As shown in FIG. 8B, when a plurality of MAC addresses are recorded in the same port Px1, the newly recorded one is preferentially used for communication.

  If the used MAC address is recorded in the slave-side FDB recording unit 112 before this, the previously recorded used MAC address is deleted.

  Thereafter, the setting completion transmission unit 116 detects that the use MAC address has been written and transmits a frame indicating that the use MAC address has been set to the master switch 1 via the CPU port P01. (See FIG. 9 for transmission contents).

  FIG. 9 is a diagram illustrating a configuration of a frame F2 transmitted by the setting completion transmission unit 116. The frame F1 has fields F21, F22, F23, and F24.

  A field F21 defines a DA (Destination Address) and describes a destination MAC address n0 (a MAC address of the CPU port P0 of the master switch 1).

  A field F22 defines SA (Source Address) and describes a source MAC address. As the MAC address of the CPU port P01 of the slave switch 11 that is the transmission source, n1 and nx1 are recorded in the slave-side FDB recording unit 112, but the newly recorded MAC address nx1 (used MAC address) has priority. Used. Therefore, SA becomes nx1.

  The field F23 is a field for describing PAYLOAD and describes that the setting of the used MAC address is completed (MAC = OK).

  Field F24 describes FCS (Frame Check Sequence). FCS is a type of data for error detection.

  The setting canceling unit 106 of the master switch 1 receives the frame F2 transmitted by the setting completion transmitting unit 116 via the slave connection port Px1 (S16).

  Thereafter, the setting cancellation unit 106 cancels the setting of the initial MAC address (S18). Specifically, the setting cancellation unit 106 deletes the initial MAC address written in the master side FDB recording unit 100.

  FIG. 10 shows the recording contents of the master side FDB recording unit 100 in the initial address setting cancellation (S18) (FIG. 10A), and the recording contents of the slave side FDB recording unit 112 in the initial address setting cancellation (S18) ( It is a figure which shows FIG.10 (b)).

  In FIG. 10A, the initial MAC address n1 recorded in association with the slave connection port Px1 is deleted by the setting cancellation unit 106. Therefore, the recorded content of the master side FDB recording unit 100 is the same as that shown in FIG.

  FIG. 10B shows the same contents as FIG.

  Next, the CPU port P02 of the slave switch 12 is connected to the slave connection port Px2 of the master switch 1. As a result, the slave switches 11 and 12 are connected to the master switch 1.

  FIG. 11 is a diagram illustrating a configuration of the network system 10 when the slave switches 11 and 12 are connected to the master switch 1. In this case, the same operation as described with reference to FIG. 4 is performed.

  When the slave switches 11 and 12 are connected to the master switch 1 at the same time, the above operation is performed in a predetermined order (for example, in ascending order of slave connection port numbers). For example, after performing the above operation on the slave switch 11, the above operation is performed on the slave switch 12.

  FIG. 12 shows the recorded contents of the master-side FDB recording unit 100 when releasing the initial address setting in the slave switch 12 (S18) (FIG. 12A), and the slave side when releasing the initial address setting in the slave switch 12. It is a figure which shows the recording content (FIG.12 (b)) of the FDB recording part 112. FIG.

  Referring to FIG. 12A, the master side FDB recording unit 100 records the used MAC address nx2 in association with the slave connection port Px2 connected to the slave switch 12.

  Referring to FIG. 12B, the slave switch 12 also records the same content as the recorded content of the slave-side FDB recording unit 112 of the slave switch 11. However, MAC address n1 (initial MAC address) and nx2 (used MAC address) are recorded in association with CPU port P02.

  Finally, the CPU port P03 of the slave switch 13 is connected to the slave connection port Px3 of the master switch 1. As a result, the slave switches 11, 12, and 13 are connected to the master switch 1.

  FIG. 13 is a diagram illustrating a configuration of the network system 10 when the slave switches 11, 12, and 13 are connected to the master switch 1. In this case, the same operation as described with reference to FIG. 4 is performed.

  FIG. 14 shows the recorded contents of the master-side FDB recording unit 100 at the time of releasing the initial address setting in the slave switch 13 (S18) (FIG. 14A), and the slave side at the time of releasing the initial address setting in the slave switch 13. It is a figure which shows the recording content (FIG.14 (b)) of the FDB recording part 112. FIG.

  Referring to FIG. 14A, the master side FDB recording unit 100 records the used MAC address nx3 in association with the slave connection port Px3 connected to the slave switch 12.

  Referring to FIG. 14B, the slave switch 13 also records the same content as the recorded content of the slave side FDB recording unit 112 of the slave switch 11. However, the MAC address n1 (initial MAC address) and nx3 (used MAC address) are recorded in association with the CPU port P03.

  According to the network system 10 according to the first embodiment, since the master switch 1 assigns MAC addresses to the slave switches 11, 12, and 13, it does not assign MAC addresses to the slave switches 11, 12, and 13 at the time of shipment. Tesumu.

  Note that the MAC addresses assigned to the slave switches 11, 12, and 13 are acquired by the master switch 1 from, for example, the slave switches 11, 12, and 13 (second embodiment). , 13 can be used to read data recorded in the registers (third embodiment), and data can be written to the registers of the slave switches 11, 12, 13 (fourth embodiment).

Second Embodiment In the second embodiment, the state of the slave switch 11 is transmitted to the master switch 1 in the network system 10 according to the first embodiment.

  FIG. 15 is a functional block diagram showing the configuration of the network system 10 according to the second embodiment. FIG. 15 illustrates a state in which the slave switch 11 is connected to the master switch 1. However, slave switches 12 and 13 having the same configuration as the slave switch 11 may be connected to the master switch 1.

  The slave switch 11 includes a slave side initial address setting unit 111, a slave side FDB recording unit 112, a slave side use address setting unit 114, a setting completion transmission unit 116, a CPU port P01, a state acquisition unit 11a, and a state transmission unit 11b.

  However, the slave side initial address setting unit 111, the slave side use address setting unit 114, and the setting completion transmission unit 116 are not shown. Further, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The state acquisition unit 11a acquires the state of the slave switch 11 (for example, whether or not an abnormality has occurred in the slave switch 11). If the acquired state is different from the previously acquired state, the acquired state is output. Note that the method of acquiring the state of the slave switch 11 is well known and will not be described.

  When the state transmission unit 11b acquires the state of the slave switch 11 from the state acquisition unit 11a, the state transmission unit 11b transmits the frame F3 describing the state to the master switch 1 via the CPU port P01. Note that the use MAC address nx1 is also described in the frame F3.

  FIG. 16 is a diagram illustrating a configuration of a frame F3 transmitted by the state transmission unit 11b. The frame F3 has fields F31, F32, F33, and F34.

  A field F31 defines a DA (Destination Address) and describes a destination MAC address n0 (a MAC address of the CPU port P0 of the master switch 1).

  Field F32 defines SA (Source Address) and describes the MAC address of the transmission source. As the MAC address of the CPU port P01 of the slave switch 11 that is the transmission source, n1 and nx1 are recorded in the slave-side FDB recording unit 112, but the newly recorded MAC address nx1 (used MAC address) has priority. Used. Therefore, the status transmission unit 11b reads nx1 from the slave-side FDB recording unit 112 and sets SA to nx1.

  A field F33 is a field for describing PAYLOAD, and describes the state of the slave switch 11. STATUS = NOW means that the current state of the slave switch 11 is described, and a word indicating the state (for example, FALSE indicating an abnormality) is described instead of NOW.

  The field F44 describes FCS (Frame Check Sequence). FCS is a type of data for error detection.

  The master switch 1 includes a master side FDB recording unit 100, a CPU port address setting unit 101, a master side use address setting unit 102, a link detection unit 103, a master side initial address setting unit 104, a use address transmission unit 105, and a setting release unit 106. Slave connection ports Px1, Px2, Px3, a state receiving unit 1a, and a state recording unit 1b.

  However, the master side FDB recording unit 100, the CPU port address setting unit 101, the master side use address setting unit 102, the link detection unit 103, the master side initial address setting unit 104, the use address transmission unit 105, and the setting release unit 106 are illustrated. Omitted. Further, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The state receiving unit 1a receives the frame F3 through the slave connection port Px1. The state receiving unit 1a further acquires the state of the slave switch 11 from the field F33 of the frame F3 and outputs it.

  The state recording unit 1b records the state of the slave switch 11 output by the state receiving unit 1a.

  Next, the operation of the second embodiment will be described.

  First, it is assumed that the initial address setting cancellation (S18) described in the first embodiment has been performed.

  Thereafter, when the state acquisition unit 11a acquires the state of the slave switch 11, if the state acquisition unit 11a is different from the previously acquired state, the acquired state is output to the state transmission unit 11b. The state transmitting unit 11b describes the acquired state in the field F33, and generates a frame F3 in which the source MAC address (used MAC address) nx1 read from the slave-side FDB recording unit 112 is described in the field F32. The frame F3 is transmitted to the master switch 1 through the CPU port P01.

  The state accepting unit 1a accepts the frame F3 via the slave connection port Px1 of the master switch 1. The state receiving unit 1a acquires the state of the slave switch 11 from the frame F3 and writes it in the state recording unit 1b.

  According to the second embodiment, the state of the slave switch 11 can be transmitted to the master switch 1 using the use MAC address nx1 set for the slave switch 11 in the first embodiment.

Third Embodiment In the third embodiment, in the network system 10 according to the first embodiment, the master switch 1 can acquire data recorded at an address A in the register 11c of the slave switch 11. Is.

  FIG. 17 is a functional block diagram showing the configuration of the network system 10 according to the third embodiment. FIG. 17 illustrates a state in which the slave switch 11 is connected to the master switch 1. However, slave switches 12 and 13 having the same configuration as the slave switch 11 may be connected to the master switch 1.

  FIG. 18 is a diagram illustrating a configuration of a frame F4 (FIG. 18A) transmitted by the register read instruction transmission unit 1c and a frame F5 (FIG. 18B) transmitted by the read data transmission unit 11e. The frames F4 and F5 will be described later.

  The master switch 1 includes a master side FDB recording unit 100, a CPU port address setting unit 101, a master side use address setting unit 102, a link detection unit 103, a master side initial address setting unit 104, a use address transmission unit 105, and a setting release unit 106. , Slave connection ports Px1, Px2, Px3, a register read instruction transmitting unit 1c, and a read data receiving unit 1d.

  However, the CPU port address setting unit 101, the master side use address setting unit 102, the link detection unit 103, the master side initial address setting unit 104, the use address transmission unit 105, and the setting release unit 106 are not shown. Further, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The register read instruction transmitting unit (read instruction transmitting means) 1c transmits a frame F4 in which a data read instruction recorded in a register (data recorder) 11c (to be described later) of the slave switch 11 is described toward the use MAC address nx1. .

  Referring to FIG. 18A, frame F4 transmitted by register read instruction transmitter 1c has fields F41, F42, F43, and F44.

  A field F41 defines DA (Destination Address) and describes a destination MAC address. The MAC address nx1 associated with the slave connection port Px1 is recorded in the master side FDB recording unit 100, and this is read out by the register read instruction transmitting unit 1c and written in the DA. Therefore, DA becomes nx1.

  A field F42 defines SA (Source Address) and describes a source MAC address. The MAC address n0 of the CPU port P0 is used as the MAC address of the master switch 1 that is the transmission source.

  A field F43 is a field for describing PAYLOAD and describes a flag (Flag) and an address (Addr). If the flag is R, it means reading of the register 11c, and if W, writing to the register 11c (described in the fourth embodiment) is meant. Since the third embodiment relates to reading of the register 11c, the flag is R. The address means an address to be read and written to the register 11c. For example, the address is A.

  The field F44 describes FCS (Frame Check Sequence). FCS is a type of data for error detection.

  The read data receiving unit 1d receives the frame F5 transmitted by the read data transmitting unit 11e via the slave connection port Px1.

  The slave switch 11 includes a slave side initial address setting unit 111, a slave side FDB recording unit 112, a slave side use address setting unit 114, a setting completion transmission unit 116, a CPU port P01, a register (data recorder) 11c, and a register reading unit 11d. The read data transmission unit 11e is provided.

  However, the slave side initial address setting unit 111, the slave side use address setting unit 114, and the setting completion transmission unit 116 are not shown. Further, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The register (data recorder) 11c records data related to the slave switch 11 (for example, various settings of the slave switch 11).

  The register reading unit 11d receives the frame F4 via the CPU port P01. The DA of the frame F4 is nx1, and the MAC address of the CPU port P01 recorded in the slave side FDB recording unit 112 of the slave switch 11 is also nx1. Therefore, the slave switch 11 can recognize that the frame F4 is a frame transmitted toward the CPU port P01 of the slave switch 11.

  The register reading unit 11d reads and outputs data (for example, D0) written in the address A recorded in the field F43 of the frame F4.

  The read data transmission unit 11e receives data from the register read unit 11d, writes it in the frame F5, and transmits it to the master switch 1.

  The register read unit 11d and the read data transmission unit 11e are recorded in the register (data recorder) 11c when the slave switch 11 receives the frame F4 transmitted by the register read instruction transmission unit (read instruction transmission unit) 1c. The data is read (register reading unit 11d) and transmitted to the master switch (first network device) 1.

  Referring to FIG. 18B, frame F5 transmitted by read data transmission unit 11e has fields F51, F52, F53, and F54.

  A field F51 defines a DA (Destination Address) and describes a destination MAC address n0 (a MAC address of the CPU port P0 of the master switch 1).

  A field F52 defines SA (Source Address) and describes a source MAC address. As the MAC address of the CPU port P01 of the slave switch 11 that is the transmission source, nx1 is recorded in the slave-side FDB recording unit 112. To do. Therefore, SA becomes nx1.

  A field F53 is a field for describing PAYLOAD and describes data D0 read by the register reading unit 11d.

  Field F54 describes FCS (Frame Check Sequence). FCS is a type of data for error detection.

  Next, the operation of the third embodiment will be described.

  First, it is assumed that the initial address setting cancellation (S18) described in the first embodiment has been performed.

  The register read instruction transmitting unit 1c transmits the frame F4 in which the data read instruction is described via the slave connection port Px1. At this time, the DA in the field F41 is set to nx1, which is the used MAC address recorded in the master-side FDB recording unit 100 in association with the slave connection port Px1.

  The register reading unit 11d receives the frame F4 via the CPU port P01, and reads and outputs the data (for example, D0) written in the address A recorded in the field F43 of the frame F4.

  The read data transmission unit 11e receives data from the register read unit 11d, writes it in the frame F5, and transmits it to the master switch 1. At this time, the SA of the field F52 is set to nx1, which is the used MAC address recorded in the slave-side FDB recording unit 112.

  The read data receiving unit 1d receives the frame F5 transmitted by the read data transmitting unit 11e via the slave connection port Px1.

  According to the third embodiment, the data recorded in the register 11c of the slave switch 11 can be transmitted to the master switch 1 using the use MAC address nx1 set in the slave switch 11 in the first embodiment. .

  Moreover, the used MAC address nx1 is a unicast MAC address. Not using the multicast MAC address for communication between the master switch 1 and the slave switch 11 is also an advantageous effect of the third embodiment.

  That is, if communication is performed using a frame in which a multicast MAC address is described, it is necessary to implement a packet through function for transmitting the multicast frame to the slave switch 11 or the like. In addition, the number of multicast MAC addresses that can be transmitted by the packet through function is also limited. Therefore, the third embodiment has an advantageous effect that it saves the labor for implementing the packet through function and avoids the restriction (limit on the number of multicast MAC addresses that can be transmitted) by the packet through function.

Fourth Embodiment In the fourth embodiment, in the network system 10 according to the first embodiment, the master switch 1 can be configured to write data to an address A in the register 11c of the slave switch 11. Is.

  FIG. 19 is a functional block diagram showing the configuration of the network system 10 according to the fourth embodiment. FIG. 19 illustrates a state in which the slave switch 11 is connected to the master switch 1. However, slave switches 12 and 13 having the same configuration as the slave switch 11 may be connected to the master switch 1.

  The master switch 1 includes a master side FDB recording unit 100, a CPU port address setting unit 101, a master side use address setting unit 102, a link detection unit 103, a master side initial address setting unit 104, a use address transmission unit 105, and a setting release unit 106. Slave connection ports Px1, Px2, Px3, and a register write instruction transmission unit 1e.

  However, the CPU port address setting unit 101, the master side use address setting unit 102, the link detection unit 103, the master side initial address setting unit 104, the use address transmission unit 105, and the setting release unit 106 are not shown. Further, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The register write instruction transmission unit (write instruction transmission unit) 1e transmits a frame F6 in which an instruction to write data D to the register (data recorder) 11c of the slave switch 11 is directed to the use MAC address nx1.

  FIG. 20 is a diagram illustrating a configuration of a frame F6 transmitted by the register write instruction transmission unit 1e. The frame F6 has fields F61, F62, F63, and F64.

  A field F61 defines a DA (Destination Address) and describes a destination MAC address. The MAC address nx1 is recorded in the master side FDB recording unit 100 in association with the slave connection port Px1, and this is read by the register write instruction transmission unit 1e and written in DA. Therefore, DA becomes nx1.

  A field F62 defines SA (Source Address) and describes a source MAC address. The MAC address n0 of the CPU port P0 is used as the MAC address of the master switch 1 that is the transmission source.

  A field F63 is a field for describing PAYLOAD and describes a flag, an address (Addr), and data (Data). If the flag is R, it means reading of the register 11c, and if W, writing to the register 11c (described in the fourth embodiment) is meant. Since the fourth embodiment relates to writing to the register 11c, the flag is W. The address means an address to be read and written to the register 11c. For example, the address is A. The data is data to be written (for example, D).

  The field F64 describes FCS (Frame Check Sequence). FCS is a type of data for error detection.

  The slave switch 11 includes a slave side initial address setting unit 111, a slave side FDB recording unit 112, a slave side use address setting unit 114, a setting completion transmission unit 116, a CPU port P01, a register 11c, and a register writing unit 11f.

  However, the slave side initial address setting unit 111, the slave side use address setting unit 114, and the setting completion transmission unit 116 are not shown. Further, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The register 11c records data related to the slave switch 11 (for example, various settings of the slave switch 11).

  The register writing unit 11f receives the frame F6 via the CPU port P01. The DA of the frame F6 is nx1, and the MAC address of the CPU port P01 recorded in the slave side FDB recording unit 112 of the slave switch 11 is also nx1. Therefore, the slave switch 11 can recognize that the frame F6 is a frame transmitted toward the CPU port P01 of the slave switch 11.

  The register writing unit 11f writes the data (for example, D) recorded in the field F63 of the frame F6 to the address A of the register 11c.

  Note that the register writing unit 11f may transmit to the master switch 1 a frame describing that the writing of data to the address A of the register 11c has been completed.

  Next, the operation of the fourth embodiment will be described.

  First, it is assumed that the initial address setting cancellation (S18) described in the first embodiment has been performed.

  The register write instruction transmission unit 1e transmits the frame F6 in which the data write instruction is described via the slave connection port Px1. At this time, DA in the field F61 is set to nx1, which is the used MAC address recorded in the master-side FDB recording unit 100 in association with the slave connection port Px1.

  The register writing unit 11f receives the frame F6 via the CPU port P01. Further, the register writing unit 11f writes the data (for example, D) recorded in the field F63 of the frame F6 to the address A of the register 11c.

  According to the fourth embodiment, the master switch 1 can transmit an instruction to write data to the register 11c of the slave switch 11 using the use MAC address nx1 set to the slave switch 11 in the first embodiment. .

  Moreover, the used MAC address nx1 is a unicast MAC address. Not using the multicast MAC address for communication between the master switch 1 and the slave switch 11 is also an advantageous effect of the fourth embodiment.

  That is, if communication is performed using a frame in which a multicast MAC address is described, it is necessary to implement a packet through function for transmitting the multicast frame to the slave switch 11 or the like. In addition, the number of multicast MAC addresses that can be transmitted by the packet through function is also limited. Therefore, the fourth embodiment has an advantageous effect that the labor for mounting the packet through function can be saved and the restriction by the packet through function (limit on the number of multicast MAC addresses that can be transmitted) can be avoided.

  Moreover, said embodiment is realizable as follows. A computer having a CPU and a memory is caused to read a medium on which a program for realizing each part of the master switch 1 and the slave switches 11, 12, and 13 is read and installed in the memory. Such a method can also realize the above functions.

1 is a diagram showing a configuration of a network system 10 according to an embodiment of the present invention. It is a functional block diagram which shows the structure of the master switch 1 concerning 1st embodiment. It is a functional block diagram which shows the structure of the slave switch 11 concerning 1st embodiment. It is a flowchart which shows operation | movement of 1st embodiment. Recording contents of the master side FDB recording unit 100 in the setting of the CPU port address and use address (S10) (FIG. 5A), recording contents of the slave side FDB recording unit 112 in the setting of the initial address (S20) (FIG. It is a figure which shows b)). The recording contents of the master side FDB recording unit 100 in the initial address setting (S12) (FIG. 6A) and the recording contents of the slave FDB recording unit 112 in the initial address setting (S12) (FIG. 6B). FIG. It is a figure which shows the structure of the flame | frame F1 which the use address transmission part 105 transmits. The recorded contents of the master side FDB recording unit 100 in the use address setting (S25) (FIG. 8A) and the recording contents of the slave FDB recording unit 112 in the use address setting (S25) (FIG. 8B). FIG. It is a figure which shows the structure of the flame | frame F2 which the setting completion transmission part 116 transmits. Recording contents of the master side FDB recording unit 100 in the initial address setting release (S18) (FIG. 10A), recording contents of the slave side FDB recording unit 112 in the initial address setting release (S18) (FIG. 10B) )). 1 is a diagram illustrating a configuration of a network system 10 when slave switches 11 and 12 are connected to a master switch 1. FIG. Recording contents of the master side FDB recording unit 100 at the time of releasing the initial address setting in the slave switch 12 (S18) (FIG. 12A), slave side FDB recording unit 112 at the time of releasing the setting of the initial address in the slave switch 12 It is a figure which shows the recording content (FIG.12 (b)). 1 is a diagram illustrating a configuration of a network system 10 when slave switches 11, 12, and 13 are connected to a master switch 1. FIG. Recording contents of the master side FDB recording unit 100 at the time of releasing the initial address setting in the slave switch 13 (S18) (FIG. 14A), slave side FDB recording unit 112 at the time of releasing the setting of the initial address in the slave switch 13 It is a figure which shows the recording content (FIG.14 (b)). It is a functional block diagram which shows the structure of the network system 10 concerning 2nd embodiment. It is a figure which shows the structure of the flame | frame F3 which the state transmission part 11b transmits. It is a functional block diagram which shows the structure of the network system 10 concerning 3rd embodiment. It is a figure which shows the structure of the flame | frame F4 (FIG.18 (a)) which the register read instruction | indication transmission part 1c transmits, and the flame | frame F5 (FIG.18 (b)) which the read data transmission part 11e transmits. It is a functional block diagram which shows the structure of the network system 10 concerning 4th embodiment. It is a figure which shows the structure of the flame | frame F6 which the register write instruction transmission part 1e transmits.

Explanation of symbols

1 Master switch (first network device)
P0 CPU port Px1, Px2, Px3 Slave connection port 11, 12, 13 Slave switch (second network device)
P01, P02, P03 CPU port
n0 CPU port P0 MAC address
n1 Initial MAC address
nx1, nx2, nx3 MAC address used 100 Master side FDB recording unit (first address recording means)
101 CPU port address setting unit 102 Master side use address setting unit (first use MAC address setting means)
103 Link detection unit 104 Master side initial address setting unit (first initial MAC address setting means)
105 Used address transmitter (used MAC address transmitter)
106 Setting Release Unit 1a Status Accepting Unit 1b Status Recording Unit 1c Register Reading Instruction Transmitting Unit (Reading Instruction Transmitting Unit)
1d Read data reception unit 1e Register write instruction transmission unit (write instruction transmission means)
111 Slave side initial address setting section (second initial MAC address setting means)
112 Slave-side FDB recording unit (second address recording means)
114 Slave side use address setting part (second use MAC address setting means)
116 Setting completion transmission unit 11a Status acquisition unit 11b Status transmission unit 11c Register (data recorder)
11d register reading unit 11e read data transmitting unit 11f register writing unit

Claims (20)

A network system comprising a first network device and a second network device connected to the first network device,
The first network device is
First use MAC address setting means for setting a use MAC address that is a MAC address to be given to the second network device;
Use MAC address transmitting means for transmitting the used MAC address toward an initial MAC address that is an address indicating the second network device;
First initial MAC address setting means for setting the initial MAC address;
With
The second network device is
Second initial MAC address setting means for setting the initial MAC address as an address indicating the second network device;
Receiving the used MAC address transmitted by the used MAC address transmitting unit, and using the used MAC address for communication between the first network device and the second network device after transmission by the used MAC address transmitting unit; Second use MAC address setting means for setting as an address indicating the second network device;
Comprising
Network system. The network system according to claim 1,
The second network device is
The second used MAC address setting means comprises setting completion transmitting means for transmitting to the first network device that the setting of the used MAC address is completed,
The first network device is
When the first network device receives a transmission from the setting completion transmission unit, a setting cancellation unit that cancels the setting of the initial MAC address is provided.
Network system. The network system according to claim 1 or 2,
The first network device is
A first address recording means for recording the used MAC address and the initial MAC address;
The second network device is
A second address recording means for recording the used MAC address and the initial MAC address;
Network system. The network system according to any one of claims 1 to 3,
The second network device is
A status transmitting means for transmitting the status of the second network device and the used MAC address to the first network device;
Network system. The network system according to any one of claims 1 to 3,
The first network device is
Read instruction transmission means for transmitting the read instruction of data recorded in the data recorder of the second network device toward the MAC address used,
The second network device is
Read data transmission means for reading the data recorded in the data recorder and transmitting it to the first network device when the second network device receives the read instruction transmitted by the read instruction transmission means Comprising
Network system. The network system according to any one of claims 1 to 3,
The first network device is
An instruction to write data to the data recorder of the second network device, the writing instruction transmitting means for transmitting to the MAC address used,
The second network device is
Data writing means for writing the data into the data recorder when the second network device receives the writing instruction transmitted by the writing instruction transmitting means;
Network system. The network system according to claim 1, wherein
The network system, wherein the first network device and the second network device are switching hubs or routers. A first network device to which a second network device is connected,
First use MAC address setting means for setting a use MAC address that is a MAC address to be given to the second network device;
Use MAC address transmitting means for transmitting the used MAC address toward an initial MAC address that is an address indicating the second network device;
First initial MAC address setting means for setting the initial MAC address;
A first network device comprising: The first network device according to claim 8,
From the second network device, the used MAC address is set as an address indicating the second network device used for communication between the first network device and the second network device after transmission by the used MAC address transmission unit. A first network device comprising setting cancellation means for canceling the setting of the initial MAC address when the first network device receives a communication indicating that the operation has been completed. The first network device according to claim 8 or 9, wherein
Comprising first address recording means for recording the used MAC address and the initial MAC address;
First network device. The first network device according to any one of claims 8 to 10,
Read instruction transmission means for transmitting a read instruction of data recorded in the data recorder of the second network device toward the MAC address used,
First network device. The first network device according to any one of claims 8 to 10,
An instruction to write data to the data recorder of the second network device, comprising a writing instruction transmission means for transmitting to the MAC address used;
First network device. The first network device according to any one of claims 8 to 12,
The first network device is a switching hub or router;
First network device. A second network device connected to the first network device,
Second initial MAC address setting means for setting an initial MAC address indicating the second network device;
The used MAC address transmitted from the first network device is received, and the used MAC address is used for communication between the first network device and the second network device after transmission of the used MAC address by the first network device. A second use MAC address setting means for setting, as an address indicating the second network device;
A second network device comprising: The second network device according to claim 14,
The second used MAC address setting means comprises setting completion transmitting means for transmitting to the first network device that the setting of the used MAC address is completed;
Second network equipment. The second network device according to claim 14 or 15,
A second address recording means for recording the used MAC address and the initial MAC address;
Second network equipment. A second network device according to any one of claims 14 to 16, comprising:
A status transmitting means for transmitting the status of the second network device and the used MAC address to the first network device;
Second network equipment. A second network device according to any one of claims 14 to 17,
The second network device is a switching hub or router;
Second network equipment. A program for causing a computer to execute information processing in a first network device to which a second network device is connected,
The information processing
A first use MAC address setting step for setting a use MAC address that is a MAC address to be given to the second network device;
A used MAC address transmitting step for transmitting the used MAC address toward an initial MAC address that is an address indicating the second network device;
A first initial MAC address setting step for setting the initial MAC address;
A program comprising A program for causing a computer to execute information processing in a second network device connected to the first network device,
The information processing
A second initial MAC address setting step for setting an initial MAC address indicating the second network device;
The used MAC address transmitted from the first network device is received, and the used MAC address is used for communication between the first network device and the second network device after transmission of the used MAC address by the first network device. A second use MAC address setting step to set as an address indicating the second network device to be used;
A program comprising

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