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A method and system for realizing proxy ARP based on free ARP

A technology of ARP request and ARP message, applied in the direction of transmission system, digital transmission system, electrical components, etc., can solve problems such as inability to complete communication, non-existence of target terminal, and no detection

Active Publication Date: 2016-08-17
北京神州数码云科信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the proxy ARP has the following disadvantages: the device with the proxy ARP function directly sends an ARP response to the requesting end that sends the ARP request message without detecting the reachability of the target IP, so that the ARP cache table of the requesting end exists The mapping relationship between the IP address of the target terminal and the hardware address. The requester initiates communication with the target terminal based on this hardware relationship. However, because the reachability of the target IP is not detected, the target terminal may not exist, and the communication cannot be completed in the end.

Method used

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  • A method and system for realizing proxy ARP based on free ARP
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  • A method and system for realizing proxy ARP based on free ARP

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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Please refer to figure 1 As shown, figure 1 It is a flowchart of a method for implementing proxy ARP based on free ARP provided in an embodiment of the present invention.

[0035] The method for implementing proxy ARP based on gratuitous ARP in this embodiment includes the following steps:

[0036] Step 101: Enable free address resolution protocol (ARP) monitoring on the access switch, and configure the address of the aggregation switch that receives the host's Internet Protocol (IP) address information.

[0037] After the access switch enables free ARP monitoring, it issues rules to the switching chip. The specific rules are as follows: After the switching chip receives the ARP message, it will copy it and send it to the access switch processor for softw...

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Abstract

The invention discloses a method for realizing proxy ARP based on gratuitous ARP, which includes the following steps: A. The access switch monitors the gratuitous ARP process of the IP host, creates and saves the host IP address information, and sends the host IP address information to the aggregation switch; B, the aggregation switch receives the host IP address information, and saves it in the host IP address information table; C, the aggregation switch detects the target in the message after receiving the ARP request message sent by the IP host Whether the IP address is in the host IP address information table, if yes, send an ARP response message to the IP host, if not, discard the ARP request message. The invention realizes the reachability detection of the target terminal in the proxy ARP.

Description

Technical field [0001] The invention relates to the field of computer data communication, in particular to a method and system for realizing proxy ARP based on free ARP. Background technique [0002] The Address Resolution Protocol (ARP) realizes that the physical address can be known through the IP address. Gratuitous ARP (Gratuitous ARP) message is a special ARP message. The sender Internet Protocol (IP) address and destination IP address carried in the message are both the local IP address. The source media access control ( The Media Access Control (MAC) address is the local MAC address, and the destination MAC address is the broadcast address. [0003] The host realizes the following functions by sending gratuitous ARP messages: (1) Determine whether the IP addresses of other hosts conflict with the IP addresses of this machine. When other hosts receive a gratuitous ARP message, if they find that the IP address in the message is the same as their own IP address, they will ret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12H04L12/70H04L47/27
Inventor 梁小冰
Owner 北京神州数码云科信息技术有限公司
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