ACCESS RELAY METHOD AND ACCESS GATEWAY DEVICE

• US 20130198830A1
• Filed: 08/06/2012
• Published: 08/01/2013
• Est. Priority Date: 10/17/2011
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: NEMOTO, NAOKAZU, Haraguchi, Naoki, Toumura, Kunihiko
• Granted Patent: US 8,938,794 B2
• Time in Patent Office: Days
• US Class Current: 726/12
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/14 Routing performance; Theoretical aspects
• CPC Class Codes: H04L 63/02 for separating internal from external traffic, e.g. firewalls
• CPC Class Codes: H04L 67/01 Protocols

Abstract

A gateway device disposed at front stage before a server has a dispersion rule of data dispersed on server side and analyzes communication data to specify a server to be accessed finally, so that identification information of the specified server is added to packet option of IP layer to thereby omit higher-rank routing processing than IP layer of gateway devices on the way. Consequently, transfer processing of a gateway device at back stage can be performed at high speed and access passing through a network route intended by manager is possible.

Claims

1. An access relay method at the time that a gateway device disposed at back stage of a gateway device at front stage which is any of swatches, gateways and firewalls routes a request from a client to a server in a network system which connect clients and servers through gateway devices to each other, comprising:

specifying a routing destination by the gateway device at front stage on the basis of analysis information of high-rank layer and a dispersion rule of data delivered to the gateway device at back stage and the server; and

giving information of the routing destination to packet option of IP layer, so that the gateway device at back stage refers to the information in analysis of IP layer option to make routing to an exact transfer destination.

2. The access relay method according to claim 1, wherein

each node which is any of the gateway devices and the switches disposed between the clients and servers gives an identifier of its own node to packet option of IP layer when the request is transferred, so that the server and the gateway device obtain network route along which the request is transmitted.

3. The access relay method according to claim 1, wherein

the gateway device routes the request from the client to the server indicated by manager.

4. The access relay method according to claim 1, wherein

the gateway device routes the request from the client to network route indicated by manager.

5. The access relay method according to claim 1, wherein

the gateway device utilizes, when the request from the client is transferred to the server, data allocation information of the server to make routing in order to prevent transfer of request between servers.

6. An access gateway device disposed at back stage of an access gateway device at front stage which is any of switches, gateways and firewalls and which routes a request from a client to a server in a network system which connect clients and servers through access gateway devices to each other, comprising:

a processing part to specify a routing destination on the basis of analysis information of high-rank layer and a dispersion rule of data delivered from the server;

a processing part to give information of the specified routing destination to packet option of IP layer; and

a processing part to refer to the information in analysis of IP layer option to make routing to a desired transfer destination on the basis of the information of routing destination received from the gateway device at front stage.

7. The access gateway device according to claim 6, comprising

a processing part to obtain a network route along which the request is transmitted in the servers and the gateway devices by making each node which is any of the access gateway devices and the switches disposed between the clients and the screens give an identifier of its own node to packet option of IP layer when the request is transferred.

8. The access gateway device according to claim 6, wherein

the access gateway device routes the request from the client to the server indicated by manager.

9. The access gateway device according to claim 6, wherein

the access gateway device routes the request from the client to a network route indicated by manager.

10. The access gateway device according to claim 6, wherein

the access gateway device utilizes, when the request from the client is transferred to the server, data allocation information of the server to make routing.