Network address switching device and its transfer sealed packet method

A network address translation and address technology, applied in the field of network communication, can solve problems such as poor packet transfer performance and slow CPU processing speed

Inactive Publication Date: 2007-06-27
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the CPU processing speed used by the traditional NAT device 10 is not fast at present, which causes the packet forwarding performance of the traditional NAT device 10 to be poor.

Method used

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  • Network address switching device and its transfer sealed packet method
  • Network address switching device and its transfer sealed packet method
  • Network address switching device and its transfer sealed packet method

Examples

Experimental program
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Embodiment Construction

[0017] Fig. 2 is a diagram of the network communication system in the embodiment of the present invention. In this embodiment, the network communication system includes an internal network 100 , a network address translation device 200 , a gateway (Gateway) 300 and an external network 400 . In this embodiment, the network address translation device 200 may be a network address translation device that converts IP addresses in software, such as a firewall or an Internet Protocol (IP) sharer. The gateway 300 is a default gateway (Default Gateway).

[0018] In this embodiment, the NAT device 200 can forward packets in the internal network 100 , and can also forward packets between the internal network 100 and the external network 400 through the gateway 300 . The network address translation device 200 will establish a connection mapping table (Connection Mapping Table) during the process of forwarding the packet. The connection comparison table includes a plurality of connection...

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Abstract

The invention relates to a network address transition device for transmitting packets, which includes a connecting query module, a tabulation module, a media access control (MAC) address query module and a transference module. The connecting query module for receiving a packet inquires a connecting reference table including a number of connecting entries, in which each entry includes a routing entry, and judge whether the connecting entry with the same packet connectivity in the connecting reference table. Tabulation id used for establishing a connecting entry of the packet and a routing entry. MAC address query module is used for getting a purpose of the MAC address based on routing entries. Transference module is for attaching the purpose of the MAC address on the packets, and transmitting the packets. The devices can avoid the processing packet burden of Internet protocol (IP) layer, thereby, improves the effectiveness of packet transference.

Description

【Technical field】 [0001] The invention relates to the field of network communication, in particular to a network address translation device and a method for forwarding packets. 【Background technique】 [0002] In recent years, with the rapid development of the Internet (Internet), the number of hosts using Internet Protocol (Internet Protocol, IP) addresses has increased significantly, so Network Address Translation (Network Address Translation, NAT) provides a widely accepted method that is sufficient to solve the problem of IP address shortage. method. [0003] However, the general NAT devices on the market currently use low-level hardware components such as central processing units (Central Processing Unit, CPU) due to manufacturing cost constraints, unlike enterprise core network equipment that uses more expensive hardware components with faster processing speeds. . Therefore, when users transmit data through traditional NAT devices, they often feel that the transmissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
CPCH04L29/12839H04L61/6022H04L29/12028H04L61/103H04L61/2517H04L29/12377H04L45/56H04L45/02H04L2101/622
Inventor 陈品文林正森
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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