Data transfer system, data transfer server, data transfer method, and program recording medium

• US 10,177,935 B2
• Filed: 06/05/2015
• Issued: 01/08/2019
• Est. Priority Date: 06/06/2014
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Miyazaki, Tomoaki
• Primary Examiner(s): Siddiqui, Kashif
• Application Number:
  US15/316,311
• Publication Number:
  US 20180109401A1
• Time in Patent Office: 1,313 Days
• CPC Class Codes: G06F 2009/45595 Network integration; Enabling network access in virtual machine instances
• CPC Class Codes: H04L 12/46 Interconnection of networks
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 2212/00 Encapsulation of packets

Abstract

Disclosed is a data transfer system capable of efficiently transferring broadcast and multicast packets when a virtual network is configured in a network arranged over multiple domains. The data transfer system is equipped with: a first data transfer server for tunnel end points which belong to a first domain; and a second data transfer server for tunnel end points which belong to a second domain. The first data transfer server, upon receiving a packet from a tunnel end point in the first domain, transfers the packet to the second data transfer server and to the tunnel end points in the first domain other than the packet transfer source tunnel end point, and the second data transfer server, upon receiving the packet from the first data transfer server, transfers the packet to the tunnel end points in the second domain.

Claims

1. A data transfer system comprising:

a first data transfer server provided for tunnel end points belonging to a first domain; and

a second date transfer server provided for tunnel end points belonging to a second domain, wherein

the first data transfer server includes one or more processors acting as a first transfer unit configured to transfer, when receiving a packet from one of the tunnel end points belonging to the first domain, the packet to the second data transfer server and to the tunnel end points belonging to the first domain but excluding a transfer source of the packet, and

the second data transfer server includes the one or more processors acting as a second transfer unit configured to transfer, when receiving the packet from the first data transfer server, the packet to the tunnel end points belonging to the second domain,

wherein

the first transfer unit is configured to change a transmission source port number of the packet to a predetermined number, and transfer the number to the second data transfer server, and

wherein

the first data transfer server includes a first storage unit configured to associate and retain the second data transfer server with the predetermined number, and

the first transfer unit is configured to change a transfer source port number of the packet to the predetermined number by referring to the first storage unit.

2. The data transfer system according to claim 1, wherein

the first storage unit is configured to associate and retain respective devices of the tunnel end point belonging to the first domain and the second date transfer server with IP (Internet Protocol) addresses of the respective devices.

6. The data transfer system according to claim 1, wherein

the second transfer unit is configured to identify a data transfer server that is a transmission source of the packet, based on a transmission source port number of the packet.

7. The data transfer system according to claim 2, wherein

the second transfer unit is configured to identify a data transfer server that is a transmission source of the packet, based on a transmission source port number of the packet.

3. A data transfer system comprising:

a first data transfer server provided for tunnel end points belonging to a first domain; and

a second date transfer server provided for tunnel end points belonging to a second domain, wherein

the first data transfer server includes one or more processors acting as a first transfer unit configured to transfer, when receiving a packet from one of the tunnel end points belonging to the first domain, the packet to the second data transfer server and to the tunnel end points belonging to the first domain but excluding a transfer source of the packet, and

the second data transfer server includes the one or more processors acting as a second transfer unit configured to transfer, when receiving the packet from the first data transfer server, the packet to the tunnel end points belonging to the second domain,

wherein

the first transfer unit is configured to change a transmission source port number of the packet to a predetermined number, and transfer the number to the second data transfer server, and

wherein

the second transfer unit is configured to identify a data transfer server that is a transmission source of the packet, based on a transmission source port number of the packet.

4. The data transfer system according to claim 3, wherein

the second data transfer server includes a second storage unit configured to associate and retain the first data transfer server with the predetermined number, and

the second transfer unit is configured to identify a data transfer server that is a transfer source of the packet, by referring to the second storage unit.

5. The data transfer system according to claim 4, wherein

the second storage unit is configured to associate and retain respective devices that is the tunnel end point belonging to the second domain and the first data transfer server with IP addresses of the respective devices.

8. A first data transfer server provided for tunnel end points belonging to a first domain, comprising:

one or more processors acting as a first transfer unit configured to transfer, when receiving a packet from one of the tunnel end points belonging to the first domain, the packet to a second data transfer server provided for tunnel end points belonging to a second domain and to the tunnel end points belonging to the first domain but excluding a transfer source of the packet, wherein

the second data transfer server is configured to transfer, when receiving the packet from the first data transfer server, the packet to the tunnel end points belonging to the second domain,

wherein

The first transfer unit is configured to change a transmission source port number of the packet to a predetermined number, and transfer the number to the second data transfer server, and

wherein

the first data transfer server includes a first storage unit configured to associate and retain the second date transfer server with the predetermined number, and

the first transfer unit is configured to change a transfer source port number of the packet to the predetermined number by referring to the first storage unit.

9. The first data transfer server according to claim 8, wherein

the first storage unit is configured to associate and retain respective devices of the tunnel end point belonging to the first domain and the second date transfer server with IP (Internet Protocol) addresses of the respective devices.