JP4104812B2 - Router auto-configuration method and address collection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to setting information of a router device.
In the present invention, the “network interface identification address” is defined as follows. Let's take IPv6 as an example.
Among the IPv6 network address formats, there are unicast address formats, and currently defined address formats include the following.
[0002]
(1) Link local address
An address that is valid only within a range that is directly connected by a physical link. A router or the like is not allowed to forward an IP packet including this address.
(2) Site local address
lPv4 address is similar to local address and can be used freely for internal use only.
[0003]
(3) Aggregable address
An address system that is defined for use on the IPv6 Internet, and that is assigned with a policy that is restricted so that the routing table on the Internet does not become large.
(4) Ipv6 projection address and (5) IPv6-compatible address
An address defined with the intention of handling IPv4 addresses in IPv6-compatible programs and using them in IPv6 and IPv4 IV translators.
[0004]
In the entire address space of lPv6, only about 1/8 of the space has been defined so far, and other address spaces are reserved for future expansion of lPv6.
The address called “network interface identification address” in this manuscript is an address for uniquely identifying an IPv6 terminal in a set of networks within a certain range among these IPv6 addresses. In the currently defined address system, an aggregateable address and a site local address correspond to this.
[0005]
However, even in the new address system that will be defined in the future, it is an IPv6 native address system (not an IPv6 projection address or compatible address), and it is an address for uniquely identifying terminals, routers, etc. in the organization network or the Internet. If there is, it is included in the “network interface identification address”.
[0006]
[Prior art]
Currently, a protocol called Ipv4 (Internet Protocol ver.4) is used as an Internet protocol. In Ipv4, the address length is as short as 32 bits. Therefore, it is known that the absolute number of addresses is insufficient when considering future demand.
[0007]
Therefore, Ipv6 is being put into practical use as the next generation Internet protocol. In Ipv6, the address length is as long as 128 bits, and the problem of address allocation can be greatly improved.
[0008]
[Problems to be solved by the invention]
In an IPv4 network, by setting up a DHCP server using DHCP (Dynamic Host Configuration Protocol), the address setting of host terminals on the network can be largely automated. However, the router that is the basis of the network must be completely set manually.
[0009]
If the IPv6 basic protocol is used, it is possible to automatically set the address of the host terminal on each network without using a DHCP server in a network where even one router is operating. However, even if Ipv6 is used, the router device must be manually set by the user. In addition, router configuration requires a certain level of expertise. Until now, networks that require routers have been built in companies and the like.
[0010]
However, in the future, even in homes and small and medium enterprises, it is expected that a network will be constructed by installing routers. In such a situation, it is desirable that a user who does not have much expertise can easily install a router.
It is an object of the present invention to realize automatic address distribution, recovery and parameter distribution functions by taking advantage of features of future network protocols such as Ipv6, and to perform automatic router configuration.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the first invention of the present application provides a router automatic setting method in a network site where a server for managing a network interface identification address for identifying a network site and at least one first router exist. This method includes the following steps AC.
[0012]
A: When connecting the second router, the second router acquires the network interface identification address of the first router, generates its own address, and is newly generated by adding the second router to the server Request a network interface identification address for the network site.
B; The server refers to the address table managing the network interface identification address and the router to which the network interface identification address is assigned in response to a request from the router, and determines the unassigned network interface identification address Notify the router.
[0013]
C: The second router sets the notified network interface identification address as a network interface identification address of a newly generated network site.
The server manages to which router the network interface identification address assigned to the site is assigned. When an address assignment request is received from a router, the server assigns an open network interface identification address to the router. As a result, the router automatically sets the address using the assigned address as the address of the newly generated network site.
[0014]
The second invention of the present application is a router device having router automatic setting connectivity, comprising means described in the following A to D for automatically setting the setting information necessary for connecting the router device to the network. provide.
A: Means for acquiring a network interface identification address of a neighboring router device notified from the network network or acquired by requesting the network network when the router device is connected to the network network.
[0015]
B: Means for setting the acquired network interface identification address for the network interface that has responded to the network interface identification address by notification or request.
C: a server device having an interface address table that generates a self-address accessible to the network using the acquired network interface identification address and associates the network interface identification interface with the router to which the network interface identification address is assigned Means for requesting a new network identification address.
[0016]
D; means for setting the network interface identification address notified from the server as a network interface identification address of a new network site generated by connection of the router device.
This device corresponds to the second router in the first invention.
The third invention of the present application manages a terminal device connected to a network, a first router, a first server that manages a network interface identification address assignment status, and a network address assigned to the terminal device. In a network connected to a second server, there is provided an automatic setting method for setting information of a router device including steps A to E below, which is used when a first router is replaced with a second router.
[0017]
A: When the second router is connected to the network, the second router requests the assigned network interface identification address from the first server.
B: The first server refers to the table for managing the network interface identification address and the router device to which the address is assigned, and notifies the second router of the network interface identification address assigned to the first router. .
[0018]
C: Based on the network interface identification address notified from the first server, the second router requests the second server for an address list of terminal devices that hold network addresses including the notified network interface identification address.
D: The second server refers to the network address table assigned to the terminal device, extracts the network address having the notified network interface identification address, and notifies the second router.
[0019]
E; The second router generates an address that can be used only within the network site based on the address list obtained from the second server, confirms whether or not communication with the terminal device is possible, and responds to the result of the confirmation. Then, the network interface identification address acquired from the first server is set in the network interface.
[0020]
When the router is replaced, a network interface identification address is already assigned to the router. Infer which interface it was defined on. For example, the network interface identification address already assigned from the DNS server is acquired, and a list of terminals having addresses including this address is acquired from the second server. For the acquired terminal, a message is acquired using the network interface identification address, and the network address of the terminal is acquired. This address is compared with the network address acquired from the second server, and a network interface identification address is set based on the comparison result.
[0021]
The fourth invention of the present application provides a router device having a router automatic setting function, comprising the following means A to G for automatically setting setting information necessary for connecting the router device to a network.
A: Means for acquiring the network interface identification address of the adjacent router device notified by the network or acquired by requesting the network when the replaced router device is connected to the network.
[0022]
B: Means for setting the acquired network interface identification address for the network interface that has responded to the network interface identification address by notification or request.
C: a first server having an interface address table that generates a self-address accessible to the network using the acquired network interface identification address and associates the network interface identification interface with the router to which the network interface identification address is assigned Means for requesting a network interface identification address assigned to the router device.
[0023]
D: Requests a list of network addresses having network interface identification addresses notified from the first server to the second server managing the network addresses assigned to the terminal devices connected to the network. means.
E: A list of network addresses acquired from the second server is classified for each network interface identification address, an address that is valid only within the network site is generated from the classified network address list, and the classified network interface identification address Means for communicating to the terminal device via
[0024]
F; Means for confirming whether or not there is a response from the terminal device to the communication
G: Means for setting the address of the network interface for each network interface identification address in accordance with the response status from the terminal device.
This apparatus corresponds to the second router in the method of the third invention.
The fifth invention of the present application provides a computer-readable recording medium in which a program for executing the router automatic setting method of the first invention is recorded.
[0025]
Examples of the recording medium include a computer readable / writable floppy disk, hard disk, semiconductor memory, CD-ROM, DVD, magneto-optical disk (MO), and others. These fifth to eighth inventions have the same effects as the first to fourth inventions, respectively.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
<Outline of the invention>
First, the outline of the present invention will be described. FIG. 1 is a principle diagram of the present invention, and shows processing when a new router 13 is newly installed in a site 11 in addition to an existing router 12 and a new network (link) 14 is added. The existing network 15 is connected to an external network 16 such as the Internet via the existing router 12. The existing network 15 is provided with an address management server 17.
[0027]
The address management server 17 manages the network address (network interface identification address) in the site 11 using the address management table 18.
The new router 13 acquires the network address of the existing network 15 from the existing router 12, and requests registration and address assignment from the address management server 17 using the acquired network address (# 1).
[0028]
In response to the request, the address management server 17 assigns one of the preassigned network addresses to the router 13 (# 2). When the network address is assigned, the new router 13 requests a routing parameter from the address management server 17 (# 3) and acquires it (# 4). The address management server 17 needs to set routing parameters in advance.
[0029]
In this way, when a router is installed to expand the network, it is possible to automatically perform router address setting and various parameter settings for the new network to be expanded.
<First embodiment>
Next, the present invention will be specifically described with reference to exemplary embodiments.
[0030]
[Network configuration]
FIG. 2 is a network configuration example showing an example in which a router y is newly installed in an existing network in the site 21 and the network (link) is expanded. The router y has three interfaces, for example, first, second, and third NICs (Network Interface Cards). Network a is an existing network. The network b is a network that is expanded and expanded by newly installing the router y. The network c is a network that is not constructed when a router is newly installed, but is expanded by adding an interface (third NIC).
[0031]
An ISDN router x and an address management server 22 are connected to the existing network a. The ISDN router x connects the provider 24 on the external network such as the Internet and the existing network a. The provider 24 includes a DNS (Domain Name System) server 25 that manages host terminal addresses under the ISDN router.
[0032]
The address management server 22 manages the network address (network interface identification address) in the site 21. Specifically, the address management server 22 has an address management table and a router management table. FIG. 3 is a conceptual explanatory diagram of the address management table. This table manages to which router the network addresses a, b, c, and d given by the provider are assigned.
[0033]
FIG. 4 is a conceptual diagram of the router management table. This table stores the network address assigned to the interface of each router and the application time based on the application for continuous use of the network address from the router under the ISDN router.
In the present invention, the following three processes are performed based on the network a having the above configuration.
[0034]
(1) New establishment processing
(2) Interface addition processing
(3) Replace process
(4) Address collection processing
The process (1) is a process for newly installing the router y in the network a having the above-described configuration and adding the network b.
[0035]
Process (2) is a process of adding the network c by adding an interface to the router y.
The process (3) is a process in which the router y is replaced with another router z for some reason, and the same setting as the router y is automatically performed in the router z.
The process (4) is a process for automatically collecting unnecessary network addresses.
[0036]
[Processing method]
Next, the processes (1) to (4) will be specifically described with reference to the drawings.
FIG. 5 shows the flow of main processing performed by the newly installed router y. When the router y is connected to the network a and activated, the router y performs main processing for activating the processes (1) to (3).
[0037]
Step S1001: The router y determines whether network addresses are not assigned to all interfaces. If "Yes" is determined, the process proceeds to step S1002. If even one interface to which a network address is assigned exists, it is determined as “No” and the process proceeds to step S1010 described later.
[0038]
Step S1002: The router y issues a router solicitation protocol for all interfaces.
Step S1003: The router y determines whether there is another router in the network to which any interface is connected. If "Yes" is determined, the process proceeds to step S1004. If "No" is determined, the process is terminated. In FIG. 2, since the ISDN router x exists in the network a to which the first NIC is connected, it is determined as “Yes”.
[0039]
Steps S1004 and S1005: The router y sets a network address for the interface of the network in which another router exists (S1004). That is, the network address a is acquired from the ISDN router x and set in the first NIC. Next, one of the interfaces to which the network address is assigned is selected and set as a basic interface (S1005). In this example, since there is one interface for which the network address is set, the interface (first NIC) to which the network a is connected becomes the basic interface.
[0040]
Step S1006: The router y transmits a “registration request” to the address management server 22 on the network to which the basic interface is connected, here the network a. If the router y is a new router, the address management server 22 returns a response indicating that the router y is registered in the network a. If the router y is a replaced router, the address management server 22 returns a response indicating that a network address has already been assigned to the router.
[0041]
Steps S1007, S1008, S1009; The router y determines whether to perform the new process (1) or the replace process (3) based on the response from the address management server 22 (S1007) (S1007). The corresponding processing is executed (S1008, S1009).
Step S1010: If there is even one interface to which a network address is assigned, the router y executes the interface addition process (2).
[0042]
Step S1011: The router y performs a process as a normal router after completing any of the processes (1) to (3). For example, the address management server 22 is applied for a continuous use of the address of each interface every predetermined time using a predetermined routing protocol.
(1) New processing, (2) Interface addition processing
(1-1) New processing on the router side
FIG. 6 is an example of the flow of processing performed by the router y in the new processing (1). Here, consider a case where a router y is newly installed in the network a shown in FIG.
[0043]
Steps S101, S102, and S103; The router y receives the router setting information for the network a from the address management server 22 after transmitting the registration request in Step S1006 of the main process (S101). Based on the received information, the router y sets a router notification protocol and a routing protocol (S102, 103).
[0044]
Step S104: The router y determines whether or not there is an interface that has not yet been set with a network address among interfaces electrically connected to others (hereinafter referred to as valid interfaces). If "Yes" is determined, the process proceeds to step S105. For example, in FIG. 2, when the hub 23 is connected to the interface (second NIC) in order to add the network b by newly installing the router y, “Yes” is determined. If “No” is determined, the process is terminated.
[0045]
In step S105, the router y performs an interface addition process to be described later. That is, a process for acquiring a new network address in the interface (second NIC) is performed.
(2-2) Router side interface addition processing
FIG. 7 is an example of the flow of processing performed by the router y in the interface addition processing (2). When the process proceeds to step S105 in the new process (1) or an interface is added to an existing router, the following process is started. In this example, in FIG. 2, the case where a router y is newly installed and the network b is added, or the case where the network c is further added after the network b is added and an interface (third NIC) is further added to the router y is equivalent. To do.
[0046]
Step S121: The router y issues a router solicitation protocol from an interface that is not assigned a network address among the valid interfaces.
Step S122: The router y determines whether another router exists in the new network. When a new network is newly added, there is usually no other router, so this determination is “No”. However, when the router y is connected to another network, this determination is “Yes”.
[0047]
Step S123: If there is no router in the new network, the router y requests the address management server 22 for a new network address for the added interface.
Step S124: The router y receives from the address management server 22 the network address assigned to the added interface and the router setting information in the network.
[0048]
Steps S125 and S126: The router y sets a router notification protocol and a routing protocol based on the received information.
Steps S127 to S131: If another router exists in the new network, it is considered that the other router is under the control of another address management server. Therefore, it is preferable to obtain the router setting information from another address management server. Therefore, in steps S127 to S131, processing similar to that in steps S1004 to S103 of the main processing and new processing is performed. Specifically, the network address of the added interface is acquired from another router, the router y is registered in another address management server, and router setting information is acquired therefrom.
[0049]
(1-1), (1-2) Address management server side main processing, new installation processing, and interface addition processing
FIG. 8 shows an example of the flow of processing performed by the address management server 22 in the main processing, new installation processing (1), and interface addition processing (2). The address management server 22 performs each reason in response to a request from the router.
[0050]
First, the main process and the new process (1) will be described.
Step S1: The address management server 22 reads a setting file in which predetermined information such as router setting information and a network address given by a provider is described.
Step S2: The address management server 22 waits for a request from the router, and when there is a request, the process proceeds to step S3.
[0051]
Steps S3 and S4: The address management server 22 determines the type of the received request (S3), and if it is a “registration request” (S4), the process proceeds to step S5. The “registration request” is a request for registration in various tables and the like transmitted from the newly set router y to the address management server 22. This request includes notification of the address in the network a of the router y. If it is another request, the process proceeds to step S9 described later.
[0052]
Steps S5 and S6: The address management server 22 refers to the address management table and determines whether or not the router that has transmitted the registration request is a newly established router (S5). If it is determined that the router is a new router, the process proceeds to step S7 described later. If the registration request source router has already been registered in the address management table, it is determined that it is not a new router, and the process proceeds to step S6.
[0053]
Step S6: The address management server 22 notifies the registration request source router of the network address already assigned to the router. Upon receiving this notification, the router performs a replacement process (3).
Step S7: When the registration request source router is a new router, the address management server 22 updates the address management table and the router management table based on the registration request. Specifically, the address management table is changed from the state shown in FIG. 3A to the state shown in FIG. The address management table in FIG. 3A is a table in a state where the router y is not set. When the router y is connected to the network a, the network address “a” is assigned to the interface. FIG. 3B shows this state.
[0054]
The address management server 22 also provides an entry for the router ID “y” and the address “a” in the router management table.
Step S8: The address management server 22 transmits the router setting information in the network a to the router y. The router setting information includes a router notification protocol and a routing protocol such as IGP or EGP. The router y automatically sets a protocol based on the router setting information. The router setting information is stored in the address management server by some method in advance.
[0055]
Next, the interface addition process (2) will be described.
Steps S9 and S10: If the request from the router is not a registration request, the process proceeds to step S9. The address management server 22 determines whether or not it is an “address addition request”, and if “No” is determined, the process proceeds to step S10, and if “Yes” is determined, the process proceeds to step S11. The “address addition request” is transmitted from the router y to the address management server 22 for acquiring the address of the interface to be added. If the request from the router is neither a registration request nor an address addition request, the address management server 22 ends the communication with the router (S10).
[0056]
Steps S11 and S12: The address management server 22 refers to the address management table (S11), and reserves an unused network address for the added interface (S12). For example, network addresses “b” and “c” are secured.
Step S13: The address management server 22 updates the address management table and the router management table based on the secured network address. That is, for the address management table, as shown in FIG. 3C, the router y is registered for the reserved address. In the router management table, an entry for the reserved network address is newly provided for the router ID “y”.
[0057]
Step S14: The address management server 22 notifies the router y of the secured network address. Thereafter, the router setting information is notified for the new network (S8).
(3) Replace process (router side)
FIG. 9 is an example of the flow of processing performed by the router in the replacement processing. Here, a case will be described as an example where, in FIG. 2, after the networks b and c are added by the router y, the router y is replaced with another router z having the same configuration. The router z assigns network addresses b and c to the interfaces (second and third NICs) other than the interface (first NIC) connected to the network a by the following process.
[0058]
Step S141: The router z obtains the network addresses a, b, and c assigned to itself from the address management server 22 in step S1007 of the main process. At this point, the router z recognizes that the network address of the first NIC is “a”, but cannot determine which is “b” and which is “c” for the second and third NICs.
[0059]
The router z creates an address list for all interfaces (second and third NICs) to which addresses are not assigned. In this case, network addresses b and c are described in the address list.
Step S142: The router z acquires the addresses of the host terminals on the network addresses b and c from the DNS server and creates a list thereof. FIG. 10A is a list of host terminal addresses held in the DNS server 25. The host terminal β on the network b is moved to the network C with the replacement of the router (FIG. 2, one-dot chain line), and the address is b. β to c. It has changed to β.
[0060]
Steps S143 and S144: The router z generates a link local address from the host part of the acquired address, and transmits a message to the host terminal on the network connected to the interface to which the address is not assigned. Furthermore, the router z creates an address list of host terminals that have returned a response to this message. FIG. 10B shows a list of hosts that returned a response. The host terminal β receives the address b. β is returned.
[0061]
Step S145: The router z calculates the degree of coincidence between the host lists created in steps S142 and S143. When there is no change in the host terminals on the networks b and c before and after replacing the router, the host lists in FIGS. 10A and 10B match. However, as described above, when the host terminal “b.β” of the network b in FIG. 2 is moved to the network c, the two do not match. Therefore, the degree of coincidence between the two is calculated, and if the degree of coincidence is equal to or greater than a predetermined value, the network addresses b and c are assigned to the second and third NICs. Otherwise, the address allocation is stopped. In this example, 100% is used as the predetermined value of the degree of coincidence.
[0062]
Steps S147 and S148: The router z determines whether or not the degree of coincidence is 100%. If “Yes” is determined (S147), the matching network addresses b and c are defined in the second and third NICs, respectively (S148).
Steps S149 and S150; Thereafter, the router z acquires router setting information from the address management server 22 in the same manner as in the new process (1), sets the router notification protocol and the routing protocol (S149), and sets the address and setting. Information settings are stored (S150).
[0063]
Step S151: When the degree of coincidence does not reach the predetermined value 100%, the router z determines that the router cannot be automatically set and notifies the user. When the router setting information is set by the user in response to this notification, the setting is saved (S150).
(4) Address collection processing (server side)
FIG. 11 shows an example of the flow of processing performed by the address management server 22 in the address collection processing. In the present invention, when the network address managed by the address management server 22 is automatically distributed, a network address that is not used is generated. Therefore, a process of automatically collecting them is performed.
[0064]
Steps S21 and S22: The address management server 22 refers to the router management table every predetermined time, and searches for an address that has passed a predetermined time or more from the update time. First, the address management server determines whether or not all entries in the router management table have been searched. If "No" is determined, the next entry is read (S22). If "Yes" is determined, the process proceeds to step S25 described later.
[0065]
Steps S23 and S24: The address management server determines whether or not a predetermined time has elapsed from the update time of the read entry (S23). If “Yes” is determined, it is determined that the corresponding router does not use the network address, and the read entry is deleted from the router management table (S24). Further, the router is deleted for the corresponding address in the address management table (S24). Then, it returns to step S21 and repeats the said determination again.
[0066]
For example, it is assumed that the address is collected when one day or more has passed since the last update time. As a result of sequentially checking the entries in the router management table shown in FIG. In this case, the entry with the router ID “y” and the address “c” is deleted from the router management table. Further, the router ID “y” is deleted from the entry of the address “c” in the address management table. As a result, the address management table is in the state shown in FIGS. 3C to 3D.
[0067]
Step S25: The address management server 22 waits for the elapse of a predetermined time after repeating the processes of steps S21 to S24 for all entries in the router management table, and repeats the process every predetermined time. As a result, addresses that are no longer used due to interface deletion or the like can be automatically collected, and useless addresses can be prevented.
[0068]
<Other embodiment examples>
(A) A recording medium on which a program for executing the above-described method of the present invention is recorded is included in the present invention. Examples of the recording medium include a computer readable / writable floppy disk, hard disk, semiconductor memory, CD-ROM, DVD, magneto-optical disk (MO), and others.
[0069]
<Appendix>
(Appendix 1)
In a network site where a server for managing a network interface identification address for identifying a network site and at least one first router exist,
When connecting the second router, the second router acquires the network interface identification address of the first router, generates its own address, and newly generates a network site by adding the second router to the server Request a network interface identification address for
The server refers to the address table managing the network interface identification address and the router to which the network interface identification address is assigned in response to a request from the router, and assigns the unassigned network interface identification address to the router. Notify
The second router sets the notified network interface identification address as a network interface identification address of a newly generated network site.
Router auto-configuration method.
[0070]
(Appendix 2)
A router device having a router automatic setting function for automatically setting the setting information necessary for connecting the router device to the network,
Means for obtaining a network interface identification address of a neighboring router device notified by the network network or acquired by requesting the network network when the router device is connected to the network network;
Means for setting the acquired network interface identification address for a network interface that has responded to the network interface identification address by notification or request;
A server device having an interface address table that generates a self-address accessible to a network using the acquired network interface identification address and associates the network interface identification interface with a router to which the network interface identification address is assigned. Means for requesting a new network identification address;
Means for setting a network interface identification address notified from the server as a network interface identification address of a new network site generated by connection of a router device;
A router device having a router automatic setting connection capability.
[0071]
(Appendix 3)
A terminal device connected to the network; a first router; a first server that manages a network interface identification address assignment state; and a second server that manages a network address assigned to the terminal device. When replacing the first router with the second router in the connected network,
When the second router is connected to the network, the second router requests the assigned network interface identification address from the first server,
The first server refers to a table for managing the network interface identification address and the router device to which the address is assigned, and notifies the second router of the network interface identification address assigned to the first router,
The second router requests the second server for an address list of terminal devices holding network addresses including the notified network interface identification address based on the network interface identification address notified from the first server,
The second server refers to the network address table assigned to the terminal device, extracts the network address having the notified network interface identification address, and notifies the second router,
The second router generates an address that can be used only within the network site based on the address list obtained from the second server, checks whether communication with the terminal device is possible, and determines whether the second router can communicate with the terminal device. Set the network interface identification address obtained from one server to the network interface.
Automatic setting method for router device setting information.
[0072]
(Appendix 4)
A router device having a router automatic setting function for automatically setting the setting information necessary for connecting the router device to the network,
Means for acquiring a network interface identification address of a neighboring router device notified by the network or obtained by requesting the network network when the replaced router device is connected to the network;
Means for setting the acquired network interface identification address for a network interface that has responded to the network interface identification address by notification or request;
A first server device having an interface address table that generates a self-address accessible to the network using the acquired network interface identification address and associates the network interface identification interface with the router to which the network interface identification address is assigned. On the other hand, means for requesting a network interface identification address assigned to the router device;
Requesting a list of network addresses having network interface identification addresses notified from the first server to a second server managing network addresses assigned to terminal devices connected to the network;
A list of network addresses obtained from the second server is classified for each network interface identification address, an address that is valid only within the network site is generated from the classified network address list, and the network address identification address is passed through the classified network interface identification address. Means for communicating with the terminal device,
Means for confirming the presence or absence of a response from the terminal device to the communication;
Means for setting the address of the network interface according to the response status from the terminal device for each network interface identification address;
A router device having a router automatic setting function.
[0073]
(Appendix 5)
A computer-readable recording medium storing a program for executing the router automatic setting method according to claim 1.
(Appendix 6)
In an IPv6 network site where a server that manages the network interface identification address in the site and a router under the server exists, the server has router setting information used by the router in advance. A router automatic configuration method that automatically configures a communication protocol by acquiring router configuration information from a server via a network.
[0074]
A router notification protocol, a routing protocol, and the like are provided in advance in the server. When a router is newly established, when an interface is added to the router, or when a router is replaced, the protocol setting of the router is automatically performed by acquiring the information from the server.
(Appendix 7)
An address collection method used for the server of an IPv6 network site where a server for managing a network interface identification address in the site and at least one router exist,
An address table for managing to which router the network interface identification address managed by the server is assigned;
Prepare a router management table to manage the continuous use application time of the network interface identification address assigned to each router,
The router makes an application for continuous use of the assigned network interface identification address at predetermined time intervals.
The server collects the network interface identification address assigned to the corresponding router by updating the address table when a predetermined time has elapsed since the last application time for continuous use.
Address collection method.
[0075]
When a predetermined time has elapsed since the last application time, the router automatically considers that the corresponding network interface identification address is not used and collects the address automatically.
(Appendix 8)
A computer-readable recording medium on which a program for executing the router device setting information automatic setting method according to attachment 3 is recorded.
[0076]
【The invention's effect】
By using the present invention, in a network using a new network protocol such as Ipv6, when a router is newly installed, an interface is added, or a router is replaced, the router can be automatically set.
[Brief description of the drawings]
FIG. 1 is a principle diagram of the present invention.
FIG. 2 shows an example of a network configuration in which the method of the present invention is used.
FIG. 3 is a conceptual explanatory diagram of an address management table.
(A) A state before a new router is installed.
(B) A state in which a router y is newly installed.
(C) A state where an interface is added to the router y and the networks b and c are added.
(D) A state in which the interface is deleted from the router y.
FIG. 4 is a conceptual explanatory diagram of a router management table.
FIG. 5 is a flowchart showing a flow of main processing performed by a router.
FIG. 6 is a flowchart showing a flow of a new process (1) performed by the router.
FIG. 7 is a flowchart showing a flow of interface addition processing (2) performed by the router.
FIG. 8 is a flowchart showing a flow of a new process (1) and an interface addition process (2) performed by the address management server.
FIG. 9 is a flowchart showing the flow of a replacement process (3) performed by the router.
FIG. 10 is a conceptual explanatory diagram of an address list of a host terminal.
(A) Host terminal address list acquired from the DNS server.
(B) A list of host terminal addresses acquired using the network interface identification address.
FIG. 11 is a flowchart showing a flow of address collection processing (4) performed by the address management server.
[Explanation of symbols]
11; Site
12: Existing router
13: New router
14: New network
15; Existing network
16; External network
17; Address management server
18; Address management table
a, b, c: Network address in IPv6
x, y: Router ID
b. α, b. β: address of host terminal on network b
c. γ, c. β: Address of host terminal on network c

Claims (5)

In a network site where a server for managing a network interface identification address for identifying a network site and at least one first router exist,
When connecting the second router, the second router acquires the network interface identification address of the first router, generates its own address, and newly generates a network site by adding the second router to the server Request a network interface identification address for
The server refers to the address table managing the network interface identification address and the router to which the network interface identification address is assigned in response to a request from the router, and assigns the unassigned network interface identification address to the router. Notify
The second router sets the notified network interface identification address as a network interface identification address of a newly generated network site.
Router auto-configuration method. A router device having a router automatic setting function for automatically setting the setting information necessary for connecting the router device to the network,
Means for obtaining a network interface identification address of a neighboring router device notified by the network network or acquired by requesting the network network when the router device is connected to the network network;
Means for setting the acquired network interface identification address for a network interface that has responded to the network interface identification address by notification or request;
A server device having an interface address table that generates a self-address accessible to a network using the acquired network interface identification address and associates the network interface identification interface with a router to which the network interface identification address is assigned. Means for requesting a new network identification address;
Means for setting a network interface identification address notified from the server as a network interface identification address of a new network site generated by connection of a router device;
A router device having a router automatic setting connection capability. A terminal device connected to the network; a first router; a first server that manages a network interface identification address assignment state; and a second server that manages a network address assigned to the terminal device. When replacing the first router with the second router in the connected network,
When the second router is connected to the network, the second router requests the assigned network interface identification address from the first server,
The first server refers to a table for managing the network interface identification address and the router device to which the address is assigned, and notifies the second router of the network interface identification address assigned to the first router, The second router requests the second server for an address list of the terminal device holding the network address including the notified network interface identification address based on the network interface identification address notified from the first server;
The second server refers to the network address table assigned to the terminal device, extracts the network address having the notified network interface identification address, and notifies the second router,
The second router generates an address that can be used only within the network site based on the address list obtained from the second server, checks whether communication with the terminal device is possible, and determines whether the second router can communicate with the terminal device. Set the network interface identification address obtained from one server to the network interface.
Automatic setting method for router device setting information. A router device having a router automatic setting function for automatically setting the setting information necessary for connecting the router device to the network,
Means for acquiring a network interface identification address of a neighboring router device notified by the network or obtained by requesting the network network when the replaced router device is connected to the network;
Means for setting the acquired network interface identification address for a network interface that has responded to the network interface identification address by notification or request;
A first server device having an interface address table that generates a self-address accessible to the network using the acquired network interface identification address and associates the network interface identification interface with the router to which the network interface identification address is assigned. On the other hand, means for requesting a network interface identification address assigned to the router device;
Means for requesting a list of network addresses having network interface identification addresses notified from the first server to a second server managing network addresses assigned to terminal devices connected to the network; ,
A list of network addresses obtained from the second server is classified for each network interface identification address, an address that is valid only within the network site is generated from the classified network address list, and the network address identification address is passed through the classified network interface identification address. Means for communicating with the terminal device,
Means for confirming the presence or absence of a response from the terminal device to the communication;
Means for setting the address of the network interface according to the response status from the terminal device for each network interface identification address;
A router device having a router automatic setting function. A computer-readable recording medium on which a program for executing the router automatic setting method according to claim 1 is recorded.

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