Processing method, access device and communication system for address resolution protocol

A technology of address resolution protocol and access equipment, which is applied in the field of communication system and address resolution protocol message processing, which can solve the problems of protocol vibration and increase the burden of gateway equipment, so as to reduce the burden, avoid protocol vibration and prevent ARP spoofing Effect

Active Publication Date: 2009-03-25
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since all ARP messages communicated between the network and the outside world must be forwarded by the gateway device, the burden on the gateway device is increased, and in the case of a network attack, it is easy to cause failures such as protocol oscillations run

Method used

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  • Processing method, access device and communication system for address resolution protocol
  • Processing method, access device and communication system for address resolution protocol
  • Processing method, access device and communication system for address resolution protocol

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Embodiment Construction

[0037]In actual networking applications, multiple access devices are usually connected under one gateway device, such as an access switch. The downlink port of the access device can be directly connected to more hosts, or through a layer The access device connects more hosts, and the access device reaches the gateway device through the uplink port, so as to achieve the purpose of making full use of the gateway device. In the embodiment of the present invention, the IP address of the gateway device is pre-configured on the downlink port of the access device, and the ARP message whose source IP address is the same as the IP address of the gateway device is discarded on the access device.

[0038] like figure 2 As shown, it is a flowchart of an embodiment of the processing method of the ARP message of the present invention, which includes the following steps:

[0039] In step 201, the access device receives an ARP message through a downlink port, and the ARP message carries a s...

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PUM

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Abstract

The invention discloses a method for handling an address resolution protocol (ARP) packet, and access equipment and a communication system thereof. The method comprises the following steps: access equipment receives an ARP packet through a lower interface, which carries an active Internet protocol (IP) address, a source media access control (MAC) address, a destination IP address and a destination MAC address; the access equipment judges whether the source IP address is the same as the IP address of gateway equipment configured on the lower interface, and the upper interface of the access equipment is connected with the gateway equipment; if the source IP address is the same as the IP address of gateway equipment, the access equipment discards the ARP packet; and if the source IP address is different from the IP address of gateway equipment, the access equipment forwards the ARP packet according to the destination IP address in the ARP packet. The embodiment of the invention can prevent the ARP packet which is deceived by an illegal host and passes through the gateway equipment of not performing ARP spoofing with respect to the gateway equipment, without imposing heavier load upon the gateway equipment.

Description

technical field [0001] The invention relates to network communication technology, in particular to a processing method for an address resolution protocol message, an access device and a communication system. Background technique [0002] Address Resolution Protocol (Address Resolution Protocol, hereinafter referred to as: ARP) is a protocol for mapping an IP address into a physical address. Since the data in the network is transmitted according to the physical address of the destination, it is necessary to first analyze the IP address of the communication device to obtain the physical address of the communication device. In Ethernet, the physical address is a 48-Bit Media Access Control (Media Access Control, hereinafter referred to as: MAC) address. [0003] When two hosts in the same physical network want to communicate with each other, both parties need to obtain the other party's IP address first, and then use ARP to resolve the other party's IP address into a MAC addre...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L29/12H04L45/52
Inventor 詹柱
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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