Method for simultaneously implementing layer 2 switching, layer 3 routing, data content filtering, and firewall function in one same chip

A technology of data content and firewall, applied in the fields of network, network security and networking, it can solve the problems of numerous networking devices, achieve flexible networking, reduce bandwidth requirements, and save CPU resources.

Inactive Publication Date: 2005-03-16
四川南山之桥微电子有限公司
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Problems solved by technology

[0007] The present invention aims to solve the above-mentioned defects of existing network firewalls and the technical problems of numerous networking equipment, and provides a method for simultaneously realizing Layer 2 switching, Layer 3 routing, data content filtering, and firewall functions using a chip (on a chip) , to ov

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  • Method for simultaneously implementing layer 2 switching, layer 3 routing, data content filtering, and firewall function in one same chip

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Embodiment Construction

[0025] The present invention realizes multiple network functions with a single chip, and its overall technical scheme includes: performing network address translation (NAT) in the first step, performing layer-2 switching in the second step, and performing layer-3 routing in the third step. The specific steps it adopts are as follows:

[0026] 1. Write the VLAN entry information into the chip.

[0027] Write the entry information of the routing table into the chip. ;

[0028] 2. Analyze the received message to get SMAC, DMAC, EtherType, SIP, DIP, Protocol, SPORT, DPORT (source MAC address, destination MAC address, source IP address, destination IP address, protocol number) of the input message , Layer 4 source PORT, Layer 4 destination PORT and the header 80byte of the packet) and other fields.

[0029] 3. Use the analyzed SMAC and DMAC to find the L2 table.

[0030] 4. Use the analyzed SIP and DIP to find the L3 table.

[0031] 5. Use the analyzed SIP, DIP, Protocol, SPOR...

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Abstract

The invention discloses a method of simultaneously realizing the functions of two-layer exchange, three-layer routing, data content filtering and firewall in a chip, using a single chip to realize multiple network functions, and its whole technical solution: 1. making network address transform (NAT); 2. making two-layer exchange; 3 making three-layer routing. It can reduce networking expenses, saves CPU resources, makes CPU specialize in other functions, and improve the whole property.

Description

technical field [0001] The invention belongs to the technical field of networks, relates to the technical fields of network security and networking, and specifically relates to a method for simultaneously realizing two-layer switching, three-layer routing, L2-L7 layer data content filtering and firewall functions on one chip (ASIC). Background technique [0002] With the continuous development of network technology, the network has become an indispensable tool in social life. Enterprises ranging from small SOHO to large enterprises with tens of thousands of people have established their own networks. But what follows is that the harm of network viruses is becoming more and more serious. From CIH, to Nimda, to Shockwave, network virus outbreaks become more frequent each time, and the scope of influence becomes larger each time, causing losses. Every time it gets worse. Faced with this situation, all enterprises with networks have to seriously consider th...

Claims

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Application Information

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IPC IPC(8): H04L12/04H04L12/24H04L12/28H04L12/933H04L29/06H04L29/12
Inventor 王步伟包雅林华海红陈卓
Owner 四川南山之桥微电子有限公司
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