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Message response method and apparatus

A message and response message technology, applied in the field of network communication, can solve problems such as traffic interruption, address loss, and ARP entry loss, so as to improve stability and avoid traffic interruption

Active Publication Date: 2016-11-09
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the controller fails or the communication link between the switching device and the controller fails, the user terminal cannot receive the response message, causing the IP (Internet Protocol, Internet Protocol) address of the user terminal to be lost (for example, when the user terminal restarts) Or the ARP entry is lost (for example, the ARP entry is not updated in time and is deleted), resulting in traffic interruption

Method used

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  • Message response method and apparatus
  • Message response method and apparatus

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Embodiment Construction

[0025] 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 examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0026] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in 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 "and / or" as use...

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Abstract

The invention provides a message response method and apparatus, applied to a switching device. The method comprises the following steps: receiving a message sent by a user terminal; when it is detected that a connection with a controller is disconnected, determining whether the received message is an address request message; when it is determined that the received message is the address request message, acquiring a first address carried in the address request message; judging whether a forwarding flow table entry containing the first address exists, wherein a corresponding relation of the first address and a second address is recorded in the forwarding flow table entry; when the forwarding flow table entry containing the first address exists, acquiring the second address in the forwarding flow table entry; and replying an address response message to the user terminal, wherein the address response message carries the second address. By adopting the method provided by the invention, the traffic interruption problem after the switching device and the controller are disconnected can be avoided, thereby improving the stability of an SDN network.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a message response method and device. Background technique [0002] SDN (Software Defined Network, Software Defined Network) is a new innovative network architecture, which realizes flexible control of network traffic by separating the control plane and data plane. [0003] The SDN network consists of controllers and switching devices. An ARP (Address Resolution Protocol, Address Resolution Protocol) message or a DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) message sent by the user terminal is forwarded by the switching device to the controller for centralized response. When the controller fails or the communication link between the switching device and the controller fails, the user terminal cannot receive the response message, causing the IP (Internet Protocol, Internet Protocol) address of the user terminal to be lost (for exam...

Claims

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Application Information

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IPC IPC(8): H04L29/12H04L12/741
CPCH04L45/74H04L61/103
Inventor 杨碧辉王海
Owner NEW H3C TECH CO LTD
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