Address resolution protocol chart management device and method

Abstract

An address resolution protocol chart management device and method relates to the processing of the address resolution protocol chart of a router or a three layer switch which are in the IP (Internet Protocol) communication field. The address resolution protocol chart management device comprises a retransmission searching module, an inspection module, a processing module, a timer and a CPU (Central Processing Unit) which is used for configuration management of the processing module. A data packet is simultaneously input into the retransmission searching module and the inspection module which transmit information to the processing module; the inspection module comprises a reverse route filtration inspection data bank and a reverse route filtration inspection data packet; and the refresh requirement is produced and input into the processing module which comprises an ARP (Address Resolution Protocol)-MAC (Media Access Control) chart. The processing module performs operation on the ARP-MAC chart through the received information and outputs the data retransmission information transmitted from the retransmission searching module through an output interface, and the timer informs the processing module the time-out information in a timing mode. The address resolution protocol chart management device and method has the advantages of reliving the dependence on the ARP process and being capable of not occupying the processing time and network bandwidth of the CPU too much.

Description

technical field [0001] The present invention relates to ARP (Address Resolution Protocol, address resolution protocol) table processing of routers or three-layer switches in the field of IP network communication, and specifically relates to a management device and method for address resolution protocol tables. Background technique [0002] The IP data packet is addressed and forwarded according to the address of the network layer, but it needs to be carried on the corresponding data link layer. The IP protocol layer sends the data packet together with the IP address of the destination network device to the local network interface. The IP address determines the link layer address, and encapsulates the IP packet in the corresponding link layer protocol for transmission. The correspondence between the IP address of the network device and the link address can be statically configured or dynamically obtained. [0003] In the Ethernet, the ARP protocol can be used to automaticall...

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Problems solved by technology

[0005] At present, the aging of the ARP table is mostly handled by the software according to the above method, but the disadvantages are: aging depends on the ARP protocol process, which takes up valuable CPU processing time; when the number of ARP entries is large or the accuracy of the aging time is required When it is higher, the number of ARP packets will increase, which will occupy network bandwidth

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