Method for distributing set information for connecting with external network

一种设定信息、外部网络的技术，应用在网络互连、特殊数据处理应用、通过路径配置进行数据交换等方向，能够解决IP地址变更、故障解决对策和网络负荷的调整困难、通信障碍等问题

Inactive Publication Date: 2005-06-22
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the IP address and the gateway are determined under the leadership of the client, and therefore, it is difficult to solve the problem of the gateway and adjust the network load on the DHCP server side.
[0011] Moreover, when continuing to access the Internet, if the DHCP server does not recognize the continued use of the IP address, an IP address can be obtained from another DHCP server, but the used IP address has been changed.
With the change of the IP address, there is an obstacle to the continuous communication

Method used

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  • Method for distributing set information for connecting with external network
  • Method for distributing set information for connecting with external network
  • Method for distributing set information for connecting with external network

Examples

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Embodiment 1

[0038] FIG. 1 is a block configuration diagram showing a client server system implementing a setting information distribution method for external network connection according to the present invention. The client-server system in this embodiment has a configuration in which one server 10 , two gateways 18 and 28 , and a plurality of clients 6 are connected to the LAN 7 . Except for the server 10, it is the same as the conventional example. Each client 6 can access the Internet 1 via any one of the gateways 18 , 28 . It is only necessary for the client 6 to have a function as a general-purpose DHCP client, and the unique functions of this embodiment are not necessary.

[0039] The server 10 is a server having the same function as a conventional DHCP server, and has a processing function of dynamically assigning an IP address corresponding to DHCP. Although it can be known by the processing described later, the content of the IP address assignment processing is different. The ...

Embodiment 2

[0053] FIG. 4 is a diagram showing the communication procedure between the server and two clients in this embodiment. The same reference numerals are used for the same processing as in FIG. 3 , and descriptions thereof are appropriately omitted. In Embodiment 1 above, when GW1 is unavailable due to a failure or the like, client A sends a DHCPREQUEST message (assignment request) close to the lease term (exactly when 50% of the lease term has elapsed) (S12). Prior to this, when accessing the Internet 1, an error occurred, and a solution was requested. Therefore, this embodiment is characterized in that when the communication path monitoring unit 13 detects that a failure has occurred in the gateway 18 ( S11 ), it notifies the client 6 of the information at that time.

[0054] That is, when a failure of the gateway 18 is detected, the address assignment processing unit 11 broadcasts the information to the client 6 (S19). Since there is no information prepared for this broadcast...

Embodiment 3

[0060] FIG. 5 is a block diagram showing another customer service system implementing the setting information distribution method for external network connection according to the present invention. The customer service system in this embodiment is different from the above-mentioned embodiments in that it has multiple servers 10 , 20 , 30 . Each server 10, 20, 30 has the same function. In this embodiment, as shown in FIG. 5 , a case where a server system is constituted by three servers 10 , 20 , and 30 will be described as an example. Certainly, also can be two, also can be more than four. The number of gateways 18, 28, and 38 is three for convenience of description, but it is not necessary to match the number of servers. The gateways 18, 28, 38 themselves may be existing products the same as those in Embodiments 1 and 2.

[0061] One or more client computers 6 connected to the LAN 7 like this server system access the Internet 1 through any one of the gateways 18 , 28 , 38 a...

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PUM

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Abstract

The present invention appropriately distributes setting information necessary for connecting to an external network to a client. At a certain moment, the address allocation processor of the server as the coordinator server returns the IP address and the GW address according to the address allocation request from the client. At the next timing, the address allocation processing unit of the server that becomes the coordinator server by the rotation process also operates in the same manner. The client refers to the specified GW address returned from the server's response, and connects to the Internet through an arbitrary gateway. The other server, noticing that the server has failed, changes the GW address assigned to the client, and switches the communication path for accessing the Internet.

Description

technical field [0001] The present invention relates to improving the usability of network communication in a client server system capable of connecting to the Internet as an external network. Background technique [0002] Fig. 13 is a diagram showing the basic configuration of a network system composed of a client server system that can access the Internet. Fig. 13 shows following structure, wherein, the gateway (GW) 4 that is connected with Internet 1 through communication line 3, DHCP (Dynamic Host Configuration Protocol) server 5, and 1 to a plurality of client computers that Internet 1 is accessed 6 is connected with LAN (Local Area Network) 7. [0003] In this configuration, the client 6 sends an IP address assignment request to the DHCP server 5 when accessing the Internet 1 . In the DHCP server 5, according to the IP address allocation request, the IP address is allocated to the above-mentioned client 6 and returned together with the known address of the gateway 4....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L29/12
CPCH04L61/5014G06F17/00G06F15/16H04L12/28
Inventor 吉田武央山田直树北川二三雄
Owner FUJIFILM BUSINESS INNOVATION CORP
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