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A method and device for clearing fast forwarding entries

A forwarding table entry and forwarding table technology, applied in the field of network communication, can solve problems such as message forwarding errors

Active Publication Date: 2019-11-08
HANGZHOU DPTECH TECH
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  • Description
  • Claims
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Problems solved by technology

[0003] However, in practical applications, since fast forwarding entries are generated based on routing information, when routing information changes, all fast forwarding entries related to the routing information also need to be updated. If the fast forwarding table is not updated in time Items are still forwarded according to the original fast forwarding table entries, which may cause some special application messages (such as some UDP protocol accounting messages) to hit the fast forwarding table that has not been updated in time and cause forwarding errors

Method used

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  • A method and device for clearing fast forwarding entries
  • A method and device for clearing fast forwarding entries
  • A method and device for clearing fast forwarding entries

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[0019] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0020] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The present application provides a method and device for clearing fast forwarding entries, which are applied to forwarding devices. The method includes: matching received messages with fast forwarding entries in the fast forwarding table; Post the information recorded in the item, and judge whether the routing information corresponding to the message changes; if the routing information corresponding to the message changes, when the destination port of the message hits the specified port, clear and The fast forwarding entry corresponding to the message. With the technical solution provided by this application, if the forwarding device receives a message sent by the application corresponding to the specified port, if the routing information corresponding to the message changes, it will promptly update the fast forwarding table that matches the message The item is cleared, so as to avoid the wrong forwarding caused by the message hitting the fast forwarding table item that has not been updated in time.

Description

technical field [0001] The present application relates to the technical field of network communication, in particular to a method and device for clearing fast forwarding entries. Background technique [0002] In related technologies, in order to realize fast forwarding of packets, the forwarding device can send the packet received for the first time to the CPU, and the CPU searches for the routing information of the sent packet, and completes the forwarding based on the found routing information. Afterwards, usually the session information of the message and the routing information can be used to establish a fast forwarding entry. When the subsequent forwarding device receives a packet of the same session again, it can match the packet with the created fast forwarding entry, and then forward the packet based on the matched fast forwarding entry, without the need to The packets are sent to the CPU for table lookup and forwarding. A fast forwarding table is generated from th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/751H04L45/02
CPCH04L45/02H04L45/08
Inventor 刘志来费宝川康正丽
Owner HANGZHOU DPTECH TECH
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