A data processing method and gateway network element

Abstract

The invention provides a data processing method and a gateway network element. The data processing method comprises the steps that after a gateway module in the gateway network element receives a specified data message, address translation processing is conducted on the data message; the processed data message is sent to a master control module or network management equipment in the gateway network element. According to the data processing method and the gateway network element, a two-layer chip is mainly used in a link layer for achieving address translation of the data message, compared with the implementation method by using three-layer routing forwarding, the data processing method is higher in speed and more stable, and the data processing method is more economic and flexible relative to a hardware implementation method.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data processing method and a gateway network element. Background technique [0002] Network Address Translation (Network Address Translation, referred to as NAT) is a technology that rewrites the source IP address and TCP (Transmission Control Protocol, Transmission Control Protocol) port when an IP packet passes through a router or firewall, such as figure 1 . A local network uses a designated subnet of a private network (such as 157.155.x.x), and one of the routing devices in the subnet occupies a private address of the network address space (such as 157.155.1.1), and also occupies a public IP address or other private network address (such as 10.x.x.x). When the data is transmitted from this network to the public network or other networks, the routing device converts the source address and port of the data, and when the data returns, it converts the source address and port...

AI Technical Summary

Problems solved by technology

[0003] NAT technology is generally implemented on routers or firewall devices, and the route is forwarded after conversion through the TCP / IP protocol stack. In the prior art, NAT is implemented on the media gateway, so that the media gateway can send data from the public network to the private network. IP packets are routed and forwarded. In this solution, all packets need to be processed by the TCP / IP protocol stack, which increases the processing flow. At the same time, this solution needs to be implemented in the main control module, which increases the CPU burden of the main control module and affects the processing of other tasks in the main control module. There is also a method of using hardware technology to implement, such as providing a method directly in FPGA (Field Programmable Gate Array, Field Programmable Gate Array) / CPLD (Complex Programmable Logic Device, complex programmable logic device), ASIC (Application Specific Integrated Circuits, Application-specific integrated circuit) and other hardware-based network address translation methods, this solution increases hardware costs, and the use of hardware solutions is not convenient for maintenance, processing, new functions, and configuration interactions with the main control module

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