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Ageing method for address analytic protocol cache table item in network device

An address resolution protocol and network device technology, which is applied in the field of aging of network device address resolution protocol cache entries, can solve problems such as unreliability, incompleteness, and large network resource consumption, so as to improve use efficiency, reduce quantity, and reduce burden effect

Inactive Publication Date: 2006-06-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] As can be seen from the above three aging methods of ARP entries, the aging method of regularly deleting ARP entries has the advantages of simple method thinking and simple processing, but in order to re-establish the ARP table, a large number of ARP entries are generated on the data link The probability of Request messages (sent in broadcast mode) will be greatly increased, so that the consumption of network resources will be relatively large
And the aging method of described periodical polling all there is bigger burden to the performance of this machine (that is the network device where ARP table is located) and the consumption of network
As for the aging method notified by the high-level application, it has the disadvantages of incompleteness and unreliability, so it is easy to cause the occurrence of dead ARP entries

Method used

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  • Ageing method for address analytic protocol cache table item in network device
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  • Ageing method for address analytic protocol cache table item in network device

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Embodiment Construction

[0036] The core idea of ​​the present invention is when the aging timer of the address resolution protocol high-speed cache entry (abbreviated as the ARP entry) expires, if the data link layer address (abbreviated as the MAC address) of the corresponding ARP entry record is used, then Whether to delete the ARP entry is determined according to whether the network device corresponding to the MAC address is online, so as to ensure that the corresponding ARP entry can still be retained in the ARP entry if it is actually valid. Whether the network device is online or not refers to whether the network device responds to the ARP Request message sent to it, and the actual validity of the ARP entry refers to that the network device corresponding to the ARP entry has performed Normal data packet sending and receiving.

[0037] The invention is an improvement to the existing ARP aging technology, and proposes a practical aging method for ARP entries. The invention improves the processin...

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Abstract

This invention relates to cache list item aging method for address resolution protocol in network equipment. It contains aging process to relative ARP list item according to the MAC address corresponded network equipment on line or not if the aging timer being overtime in APR list item aging timing period. Said invention avoids the list item being deleted. Said invention reduces the APR Request message number and load, and data loss.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to an aging method of address resolution protocol cache entry (ARP entry for short) of a network device. Background technique [0002] In a communication network, for a device on a data link, a method is needed to discover the data link identifier of the neighbor, and the said data link identifier is the MAC (Media Access Control) address, so that the data packet can be transmitted to correct destination. The TCP / IP (Transmission Control Protocol / Internet Protocol) family of IPv4 (Internet Protocol Version 4) uses the ARP (Address Resolution Protocol) protocol to obtain the corresponding MAC address according to the specified network layer address (ie IP address). [0003] The process of obtaining the MAC address based on the ARP protocol is as follows: figure 1 shown, including: [0004] When a network device needs to obtain the MAC address of another network devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
Inventor 李强张鸿雁
Owner HUAWEI TECH CO LTD
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