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A method and device for updating port address in address parsing protocol table

A port address and update address technology, applied in the field of communication, can solve the problems of long ARP aging time and the inability of the switch to forward three-layer packets, and achieve the effect of avoiding three-layer forwarding and fast update.

Active Publication Date: 2008-02-20
NEW H3C TECH CO LTD
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Problems solved by technology

[0006] However, in the existing technology, the ARP aging time is generally relatively long. For example, the default aging time can be set to 20 minutes, and the update of the port address in the ARP entry will be relatively slow, which will cause the switch to fail to correctly perform the three-way operation for a long period of time. layer packet forwarding

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  • A method and device for updating port address in address parsing protocol table
  • A method and device for updating port address in address parsing protocol table

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Embodiment Construction

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

[0034] In order to update the port address in the Address Resolution Protocol (ARP) table in time when the port migration occurs, the present invention associates the process of updating the port address in the ARP table with the MAC migration caused by the port migration. In this way, the present invention can update according to the port address obtained in the MAC migration process without waiting for ARP aging, thereby achieving the purpose of quickly updating the port address in the ARP table.

[0035] Fig. 1 is a flow chart of the method for updating the port address in the ARP table in the present invention. As shown in Figure 1, the method may include:

[0036] Step 101: When performing MAC migration caused by port migration, obt...

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Abstract

The utility model provides a method and a device to update a plurality of port addresses in an address resolution protocol (ARP) table, which is characterized in that when a media access control (MAC) migration is initiated by a port migration, a detected port address and a corresponding MAC address after the port migration are obtained during the MAC migration; a port address in the ARP table, corresponding to the detected MAC address, is updated to be the detected port address. The utility model has the advantages that the switch does not need to wait until the ARP ages so that the fast update of the port addresses in the ARP table is realized and that the third layer forwarding not correctly carrying on in a long time during the port migration is avoided.

Description

technical field [0001] The invention relates to the technology in the communication field, in particular to a method and equipment for updating port addresses in an address resolution protocol table. Background technique [0002] When the switch performs three-layer forwarding, it usually needs to use the Address Resolution Protocol (ARP, Address Resolution Protocol) table to determine the port address for sending the message. The ARP table can include Internet Protocol (IP, Internet Protocol) address, media access control (MAC , Media AccessController) address, port address and other information. [0003] The process of the three-layer forwarding of the switch is roughly as follows: when the switch receives a message, it first looks up the routing table according to the destination IP address carried in the message, and determines the IP address of the next hop from the routing table; The IP address of the hop looks up the ARP table, determines the corresponding MAC addres...

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L45/74
Inventor 郑上闽吕志勇焦雪松
Owner NEW H3C TECH CO LTD
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