Response method for free ARP request and gateway device thereof

A technology of ARP request and gateway equipment, applied in the network field, can solve the problems of free ARP invalidation, affecting legitimate users to use the network, etc., and achieve the effect of avoiding IP address conflicts

Active Publication Date: 2011-06-29
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the gateway device broadcasts the gratuitous ARP of the gateway device to the outside, it will invalidate the gratuitous ARP sent by the monitoring device to the illegal user device. The reason is that the gratuitous ARP request sent by the monitoring device will be updated by the gratuitous ARP request sent by the gateway. The user equipment will continue to access the network according to the ARP entry of the correct gateway device
However, the method of only alerting the network administrator will affect the use of the network by legitimate users.

Method used

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  • Response method for free ARP request and gateway device thereof
  • Response method for free ARP request and gateway device thereof
  • Response method for free ARP request and gateway device thereof

Examples

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Embodiment Construction

[0043] A kind of response method of free ARP request is provided in the present invention, as image 3 shown, including:

[0044] Step 301, when the gateway device receives the gratuitous ARP request with the same IP address as the gateway device, it judges whether the source MAC address of the gratuitous ARP request is a trusted authorized MAC address.

[0045] Step 302, when the source MAC address is a trusted authorized MAC address, the gateway device allows the gratuitous ARP request with the same IP address as the gateway device to propagate in the network.

[0046] In the present invention, a trusted authorized MAC address is configured on the gateway device, so that when the gateway device receives a free ARP request identical to the IP address of the gateway device, whether the source MAC address of the free ARP request is a trusted authorized MAC address Handle accordingly. It effectively avoids IP address conflicts and will not affect the monitoring of illegal networ...

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PUM

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Abstract

The invention discloses a response method for free ARP (address solution protocol) request and a gateway device for the application of the method. The method comprises the following steps: the gatewaydevice, when receiving the free ARP request with the same IP address as the gateway device, determines whether the source MAC (media access control) address of the free ARP address is a dependable authorized MAC address; and if the source MAC address is the dependable authorized MAC address, the gateway device allows the free ARP request with the same IP address as the gateway device to be transmitted in the internet. By configuring the dependable authorized MAC address on the gateway device, the invention leads the gateway device to carry out corresponding processing when receiving the freeARP request with the same IP address as the gateway device according to whether the source MAC address of the free MAC request is the dependable authorized MAC address. The IP address conflict can beeffectively avoided without impact on the monitoring to an illegal network device of a network monitoring device.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a response method for a free ARP request and a gateway device applying the method. Background technique [0002] In the network, the user equipment generally communicates with the equipment in the external network through the gateway equipment. A typical network diagram is as follows: figure 1 shown. The user equipment obtains the ARP (Address Resolution Protocol, Address Resolution Protocol) entry of the gateway device in a certain way, and the ARP entry includes the IP (Internet Protocol, Internet Protocol) address and the MAC (Medium Access Control, media access protocol) address of the gateway device. Control) address, and then the user equipment communicates with the equipment in the external network through the gateway equipment. [0003] There are usually some illegal user equipments (for example, user equipments that have not paid fees) in the network, and these illega...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L29/06H04L12/66
Inventor 李海军孙强
Owner NEW H3C TECH CO LTD
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