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Load balancer

一种负载平衡器、服务器的技术，应用在仪器、数据交换细节、网络数据管理等方向，能够解决不能确保服务器连贯性等问题

Inactive Publication Date: 2009-03-18
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Assume with Figure 16 In the same way, a load balancer LB is set up between router R3 and servers S1 and S2. When the load balancer LB receives such a packet and Figure 16 In the same way, when the source address (SA) is used as the retrieval (selection) key, the load balancer mistakes an access from the same mobile IP terminal MN as an access from another mobile IP terminal, and thus changes from server S1 to server S2, so there is a problem that the continuity of the server cannot be ensured

Method used

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Embodiment (1

[0056] figure 1 A network embodiment (1) applying a load balancer according to the present invention is illustrated. In this embodiment, when the mobile IP terminal MN moves from the area to which the router R1 belongs to the area of ​​the router R2, and its care-of address changes from CoA1 to CoA2, the identification information dedicated to the mobile IP terminal MN is extracted (retrieval keyword), so if the server S1 has been selected, the server S1 is also selected during the communication, thereby maintaining the server continuity maintenance function.

[0057] figure 2 icon figure 1 The structure of the load balancer LB is shown in (1). In this structure, the load balancer LB includes an IPv6 header information extractor 1 , a load balancing table 2 , a table controller 3 and a distribution processor 4 .

[0058] The IPv6 header information extractor 1 extracts the identification information, so that the table controller 3 uses the identification information as ...

Embodiment (2

[0082] Figure 11 and Figure 12A network embodiment (2) to which a load balancer according to the present invention is applied is illustrated. This embodiment is a system that exchanges information between the home agent HA and the load balancer LB so as to change the retrieval key as the mobile IP terminal MN moves.

[0083] In the following, reference will be made to Figure 11 and Figure 12 The overall operation of this embodiment is described.

[0084] First, it will be described as Figure 11 An example of the operation when the load balancer LB receives the first packet from the mobile IP terminal MN is shown.

[0085] ① The load balancer LB receives the mobile IPv6 packet from the mobile IP terminal MN on the care-of address CoA1 through the routers R1 and R3.

[0086] ② The load balancer LB extracts the source address (SA=CoA1) of the mobile IP terminal MN and the home address of the terminal MN.

[0087] ③ Based on the extracted care-of address CoA1 (and othe...

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Abstract

In a load balancer preserving a function of server consistency maintenance during communications even if a terminal is a mobile terminal, identifying information specific to a mobile IP terminal is extracted from an arrival packet, and a destination server to be connected is determined based on the identifying information. Also, a home agent or a terminal is requested to notify a change of the care-of address when the care-of address of the terminal has changed, and a destination server to be connected is determined by regarding the notified care-of address as identifying information.

Description

technical field [0001] The invention relates to a load balancer, in particular to a load balancer for relieving server load concentration. Background technique [0002] Various forms of load balancers are known. An example of this is in Figure 16 As shown in the figure, the load balancer LB receives a packet sent by the client CL through the routers R1 and R3, and selects a server as the server according to the source address (SA) or the combination of the source address and the TCP port number included in the IP header of the packet. The target to connect to. [0003] Also, for example, there is a form of specifying a server allocation destination on a higher application layer, or a system of selecting a server based on the URL of the destination to be connected. [0004] Moreover, it is already possible to perform server assignment by identifying an SSL (Secure Sockets Layer: an encryption protocol used to secure TCP / IP communications over the transport layer) session I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/00H04L12/56H04L12/02H04L12/70H04L12/803H04L29/06H04L29/08H04M3/42H04M3/50H04W8/26H04W28/00H04W40/34H04W40/36H04W80/04
CPCH04L67/1008H04L67/1006H04L29/08144H04L29/08162H04L29/0653H04W80/04H04L67/1017H04L69/22H04L29/08171H04L29/08198H04L29/08234H04L67/1023H04L67/1002H04L67/1014H04L29/08207H04L67/1001
Inventor 小野英明武智竜一中津川惠一
Owner FUJITSU LTD