JP4480702B2 - Communication method, communication system, router and program thereof - Google Patents

Description

  The present invention relates to router technology, and more particularly to technology for mutually managing the latest setting information of neighboring routers.

  Conventionally, management of router setting information in a network has been performed by recording on a recording medium such as paper or a floppy disk (registered trademark). In addition, the setting information of each router is transmitted to the network management apparatus so that it is centrally managed by the network management apparatus.

  When the method of backing up the router setting information on the above recording medium is used, it is necessary to record the setting information on the medium every time the setting is changed, which takes time and labor. In addition, when a router is replaced in the event of any failure, the router is manually set using the setting information recorded on the medium. Stop time may be longer.

  Furthermore, when the method of centralized management by the network monitoring device is used, when a router has failed and the router is replaced, it is necessary to input settings until the connection to the network monitoring device is established.

  As a method for managing a network, for example, there is a method for managing a network by exchanging information held by routers between routers as in Patent Document 1. However, Patent Document 1 is a technique for managing a network by exchanging route information, and is not a technique for managing router setting information. Therefore, the technique is applied even if the technique is used to manage router setting information. I couldn't.

  Therefore, the problem to be solved by the present invention is to solve the above-mentioned problems and to provide a technique for managing router setting information.

In addition, when managing router configuration information, it can be managed without the labor and cost of registering router configuration information, and correct configuration information can be reliably registered in a new router. To provide technology.
JP-A-10-336288

A first invention for solving the above problem is a communication system,
Notification means for notifying other routers of the setting information of the own router at a predetermined timing;
When setting information of another router is received, it is confirmed whether the address of the router that notified the received setting information exists in the routing table of the own router, and if there is, the address of the router and the received setting information a generating means for generating a configuration table in association bets,
When the setting information of the own router is not registered, a transmission means for transmitting a transmission request for the setting information of the own router to another router,
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. Search means for transmitting the set information,
Storage means for storing setting information transmitted from another router in response to a transmission request transmitted by the own router as setting information of the own router .

According to a second invention for solving the above-mentioned problem, in the first invention,
It has a setting means for setting its own router based on the stored setting information.

According to a third invention for solving the above-described problem, in the first or second invention,
The notifying unit is configured to notify the setting information every time the setting information of the own router is updated.

According to a fourth invention for solving the above-mentioned problem, in the first or second invention,
The notification means is configured not to notify the setting information when the setting information of the own router is not registered.

A fifth invention for solving the above-described problems is any one of the first to fourth inventions,
The notifying means is configured to determine a router to notify setting information based on the routing table.

A sixth invention for solving the above problem is a router,
Notification means for notifying other routers of the setting information of the own router at a predetermined timing;
When setting information of another router is received, it is confirmed whether the address of the router that notified the received setting information exists in the routing table of the own router, and if there is, the address of the router and the received setting information Generating means for generating a configuration table in association with
When the setting information of the own router is not registered, a transmission means for transmitting a transmission request for the setting information of the own router;
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. Search means for transmitting the set information,
Storage means for storing setting information transmitted from another router in response to a transmission request transmitted by the own router as setting information of the own router;
It is characterized by having .

A seventh invention for solving the above problem is a communication method,
A notification step of notifying the other router of the setting information of the own router at a predetermined timing;
Upon receiving the setting information of the other router, a confirmation step for confirming whether the address of the router that notified the received setting information exists in the routing table of the own router;
As a result of the confirmation, if the address exists, a generation step of generating a configuration table by associating the address of the router with the received setting information ;
When the setting information of the own router is not registered, a sending step of sending a request for sending the setting information of the own router to another router;
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. A search step for sending the set information,
A storage step of storing the setting information transmitted from another router in response to the transmission request transmitted by the own router as the setting information of the own router .

An eighth invention for solving the above-described problem is the seventh invention, wherein
It has a setting step for setting its own router based on the stored setting information.

A ninth invention for solving the above-described problems is the seventh or eighth invention,
The notifying step notifies the setting information every time the setting information of the own router is updated.

The tenth invention for solving the above-mentioned problems is the above-mentioned seventh or eighth invention,
The notifying step is not performed when the setting information of the own router is not registered.

An eleventh invention for solving the above-mentioned problems is any one of the seventh to tenth inventions,
A router for notifying setting information is determined based on the routing table.

A twelfth invention for solving the above-mentioned problems is a router program, wherein the program
Notification means for notifying other routers of the setting information of the own router at a predetermined timing;
When setting information of another router is received, it is confirmed whether the address of the router that notified the received setting information exists in the routing table of the own router, and if there is, the address of the router and the received setting information And a generation unit that generates a configuration table in association with
When the setting information of the own router is not registered, a transmission means for transmitting a transmission request for the setting information of the own router;
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. Search means for transmitting the set information ,
In response to a transmission request transmitted by the own router, the setting information transmitted from another router is functioned as a storage unit that stores the setting information as the setting information of the own router.

  The present invention combines the own route information and the own setting information to notify the neighboring router of the setting information, and the setting of a plurality of neighboring routers managed by itself in response to an inquiry from a certain neighboring router. A function for selecting and notifying appropriate setting information from the information, and a function for setting based on the setting information notified from the adjacent router.

  According to the present invention, correct setting information can be surely registered without taking the labor and cost of managing router setting information.

  This is because neighboring routers exchange their own router configuration information and manage each other. When exchanging with a new router, the new router configuration information is based on the configuration information held in the neighboring router. This is because the configuration for registering is taken.

  In addition, since the present invention has a configuration in which the router for exchanging the setting information of the own router is determined based on the routing table stored in the own router, human work can be eliminated, and labor and cost can be saved. Can be reduced.

  In addition, since the present invention notifies the neighboring router of the setting information every time the setting information of the own router is updated, the new setting information can be surely registered in the new router when exchanging with a new router. .

  In order to explain the features of the present invention, it will be specifically described below with reference to the drawings.

  FIG. 1 is a schematic diagram of a communication system according to the present invention.

  As shown in FIG. 1, the communication system of the present invention includes a router 1, a router 2, and a router 3, and a network 11, a network 12, a network 13, and a network 14.

  The router 1 is connected to the network 11 and the network 12. The router 11 is defined and connected to the network 11 by the IP address 21, and is defined and connected to the network 12 by the IP address 22. The router 1 holds a configuration table 31 and a routing table 51. In the configuration table 31, as shown in FIG. 2, the next hop IP address to the router 2 that is an adjacent router of the router 1 and the configuration file 42 of the adjacent router 2 defined and connected by this IP address correspond to each other. It is attached. The next hop IP address is extracted from the routing table 51 of the router 1 as shown in FIG. The configuration file is router setting information, and describes, for example, an interface IP address, interface control information, SNMP (Simple Network Management Protocol) setting information, a host name, and the like.

  The router 2 is connected to the network 12 and the network 13. The router 12 is defined and connected to the network 12 by the IP address 23, and is defined and connected to the network 13 by the IP address 24. The router 2 holds a configuration table 32 and a routing table 52. As shown in FIG. 2, the configuration table 32 includes the router 1 and the next hop IP address to the router 2 that are adjacent to the router 2, and the configuration file 41 or configuration of the adjacent router defined and connected by this IP address. The file 42 is associated with each other. The next hop IP address is extracted from the routing table 52 of the router 2 as shown in FIG.

  The router 3 is connected to the network 13 and the network 14, and is defined and connected to the network 13 by the IP address 25, and is defined and connected to the network 14 by the IP address 26. The router 3 holds a configuration table 33 and a routing table 53. As shown in FIG. 2, in the configuration table 33, the next hop IP address to the router 3 which is the neighboring router of the router 3 and the configuration file 42 of the neighboring router defined and connected by this IP address are associated with each other. It has been. The next hop IP address is extracted from the routing table 53 of the router 3 as shown in FIG.

  As illustrated in FIG. 4, the router 1, the router 2, and the router 3 include a storage unit 101, a notification unit 102, a generation unit 103, a transmission request generation unit 104, a search unit 105, a setting unit 106, a transmission unit 107, and a reception Part 108.

  The storage unit 101 stores a configuration table, a routing table, and a configuration file.

  The notification unit 102 detects when the configuration file (setting information) of its own router is registered or updated by a setting change or a routing table change, and refers to the routing table stored in the storage unit 101. Then, the next hop IP address to the adjacent router is extracted. Then, the new configuration file of the own router is notified to the extracted next hop IP address. Also, to prevent accidental notification of an empty configuration file and overwriting of the configuration file of the own router stored in the neighboring router, when the configuration file of the new router is empty, the configuration file of the own router Do not notify. Note that, in this specification, description will be made using a case where the update of the configuration file is detected and the configuration file is notified, but the configuration file notification processing may be performed periodically. However, it is preferable to perform the notification process every time the configuration file is updated due to a setting change or a routing table change.

  Upon receiving the notification of the configuration file, the generation unit 103 refers to the routing table stored in the storage unit 101 and confirms that the notification is from the adjacent router (next hop IP address) of the own router. After confirmation, the next hop IP address to the router 2 and the configuration file of the router are stored in association with each other to generate a new configuration table. If there is a router that does not notify the configuration file for a certain period, the configuration file of the corresponding router is deleted from the configuration table stored in the storage unit 101, and the next hop IP address to the router is also determined. Also delete from the config table.

  If the configuration file of the own router is not stored in the storage unit 101, the transmission request generation unit 104 detects that and generates a transmission request for the configuration file of the own router for the network connected to the own router. Then, the data is transmitted via the transmission unit 107. When connected to a plurality of networks, a transmission request may be transmitted to the previously connected network or may be transmitted to all networks.

  When the search unit 105 receives a transmission request via the reception unit 108, the search unit 105 configures the configuration file associated with the address from the configuration table stored in the storage unit 101 based on the address of the router that transmitted the transmission request. And the configuration file is transmitted via the transmission unit 107.

  The setting unit 106 receives the configuration file transmitted in response to the transmission request via the reception unit 108, and sets its own router based on the configuration file. Note that when the transmission request generation unit 104 transmits a transmission request to a plurality of networks, all configuration files transmitted in response to all transmission requests are received even if settings are made based on the first received configuration file. Thus, when all the configuration files are the same, they may be set based on any one of the configuration files, and may be arbitrary.

  Next, the operation of the present invention will be described with reference to FIGS.

  First, normal operation will be described with reference to FIG. FIG. 4 is a chart for explaining a case where the own configuration file is notified to the adjacent router in the normal state.

  The notification unit 102 of the router 2 refers to the routing table 52 of the own router stored in the storage unit 101 (step A1), and next hop IP address 22 to the adjacent router 1 and next hop to the adjacent router 3 The IP address 25 is extracted (step A2).

  Further, the notification unit 102 notifies the next hop IP address 22 and the next hop IP address 25 by transmitting the configuration file 42 of the own router 2 via the transmission unit 107 (step A3).

  Upon receipt of the notification, the generation unit 103 of the router 1 and the router 3 refers to the routing table 51 and the routing table 53 of the own router stored in the storage unit 101 (steps A6 and A7), respectively, and from the next hop IP address. Confirm that it is a notification (steps A8, A9).

  After the confirmation, the generation unit 103 of the router 1 and the router 3 stores the next hop IP address 23, the next hop IP address 24, and the configuration file 42 for the router 2 as a pair (steps A10 and A11), and the configuration table 31. The configuration table 33 is updated (steps A12 and A13).

  The router 1 and the router 3 also perform the same operation as described above, and save the setting information of the adjacent router and update the configuration table. A configuration table created as a result of the update is shown in FIG. A series of operations are performed periodically, and the latest setting information is always saved. When sudden processing such as setting change or routing table change is performed, notification processing is performed each time. If the notification is not received for a long time, the stored setting information is deleted and deleted from the configuration table.

  Next, an operation for receiving the configuration file of the own router when the configuration file of the own router is empty due to device exchange or the like will be described with reference to FIG. FIG. 6 is a chart for explaining the operation when the configuration file of the own router is transmitted.

  When a failure occurs in the router 3 and the router 4 is replaced with a new router 4, the router 4 is a new router and there is no configuration file and no settings are made (step B1). Then, the IP address 25 is set in the router 4, and the router 4 is connected to the network 13 (step B2).

  The transmission request generation unit 104 of the router 4 generates a transmission request and executes a configuration file inquiry to the network 13 (step B3).

  When the router 2 connected to the network 13 receives the inquiry from the router 4 via the receiving unit 108, the router 2 confirms the IP address 25 of the inquiry source (step B5).

  The search unit 105 of the router 2 searches the configuration file associated with the IP address 25 with reference to the configuration table 32 stored in the storage unit 101 (step B6). In this operation, the configuration file 43 is searched.

  The search unit 105 returns the searched configuration file 43 to the router 4 that is the inquiry source via the transmission unit 107 (step B7).

  Upon receiving the configuration file 43, the setting unit 106 of the router 4 stores the configuration file in the storage unit 101, and starts setting based on this configuration file (step B9).

  In order to prevent the new router 4 from notifying the neighboring router of an empty configuration file by mistake when the new router 4 is installed and overwriting the configuration file 43 of the own router stored in the neighboring file. When the configuration file of the new router is empty, its own configuration file is not notified. Therefore, the router 4 can obtain the configuration file 43 stored in the router 2 without being changed. After obtaining the configuration file 43, the router 4 notifies its own configuration file as usual (step B10).

  According to the present invention described above, the setting information of the own router is exchanged between adjacent routers to manage each other, and the setting of the new router is performed based on the setting information held in the adjacent router when exchanging with the new router. Since the configuration for registering information is adopted, correct setting information can be surely registered without taking the labor and cost of managing router setting information.

  The router of the present invention described above can be configured by hardware as is apparent from the above description, but can also be realized by a program. In such a configuration, functions and operations similar to those of the above-described embodiments are realized by a processor that operates according to a program stored in a program memory. Note that only a part of the functions of the above-described embodiment can be realized by a computer program.

FIG. 1 is a block diagram of a communication system according to the present invention. FIG. 2 is an example of a configuration table. FIG. 3 is an example of a routing table. FIG. 4 is a block diagram of the router. FIG. 5 is a diagram for explaining the operation of notifying the configuration file. FIG. 6 is a diagram for explaining an operation for receiving a configuration file.

Explanation of symbols

1, 2, 3 Router 11, 12, 13 Network 31, 32, 33 Configuration table 41, 42, 43 Configuration file 51, 52, 53 Routing table

Claims (12)

A communication system,
Notification means for notifying other routers of the setting information of the own router at a predetermined timing;
When setting information of another router is received, it is confirmed whether the address of the router that notified the received setting information exists in the routing table of the own router, and if there is, the address of the router and the received setting information Generating means for generating a configuration table in association with
When the setting information of the own router is not registered in the own router, a transmission means for transmitting a transmission request for the setting information of the own router to another router,
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. Search means for transmitting the set information,
A communication system comprising: storage means for storing setting information transmitted from another router in response to a transmission request transmitted by the own router as setting information of the own router . The communication system according to claim 1, further comprising a setting unit configured to set a local router based on the stored setting information.   The communication system according to claim 1 or 2, wherein the notification unit is configured to notify the setting information every time the setting information of the own router is updated.   The communication system according to claim 1 or 2, wherein the notification unit is configured not to notify the setting information when the setting information of the own router is not registered.   5. The communication system according to claim 1, wherein the notifying unit is configured to determine a router that notifies the setting information based on the routing table. 6. A router,
Notification means for notifying other routers of the setting information of the own router at a predetermined timing;
When setting information of another router is received, it is confirmed whether the address of the router that notified the received setting information exists in the routing table of the own router, and if there is, the address of the router and the received setting information Generating means for generating a configuration table in association with
When the setting information of the own router is not registered, a transmission means for transmitting a transmission request for the setting information of the own router;
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. Search means for transmitting the set information,
Storage means for storing setting information transmitted from another router in response to a transmission request transmitted by the own router as setting information of the own router;
Router characterized in that it comprises a. A communication method,
A notification step of notifying the other router of the setting information of the own router at a predetermined timing;
Upon receiving the setting information of the other router, a confirmation step for confirming whether the address of the router that notified the received setting information exists in the routing table of the own router;
As a result of the confirmation, if the address exists, a generation step of generating a configuration table by associating the address of the router with the received setting information ;
When the setting information of the own router is not registered in the own router, a sending step of sending a request for sending the setting information of the own router to another router;
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. A search step for sending the set information,
A communication method comprising: a storing step of storing setting information transmitted from another router in response to a transmission request transmitted by the own router as setting information of the own router . The communication method according to claim 7, further comprising a setting step of setting a local router based on the stored setting information.   9. The communication method according to claim 7, wherein the notifying step notifies the setting information every time the setting information of the own router is updated.   9. The communication method according to claim 7, wherein the notification step is not performed when the setting information of the own router is not registered.   The communication method according to any one of claims 7 to 10, wherein a router for notifying setting information is determined based on the routing table. A router program, wherein the program
Notification means for notifying other routers of the setting information of the own router at a predetermined timing;
When setting information of another router is received, it is confirmed whether the address of the router that notified the received setting information exists in the routing table of the own router, and if there is, the address of the router and the received setting information Generating means for generating a configuration table in association with
When the setting information of the own router is not registered, a transmission means for transmitting a transmission request for the setting information of the own router;
When a transmission request is received from another router, setting information associated with the address is searched from the configuration table based on the address of the router that transmitted the transmission request, and the search is performed on the router that transmitted the transmission request. Search means for transmitting the set information ,
Program for causing to function as storage means for storing setting information transmitted from another router to the transmission request local router sends a setting information of the router.

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