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SDN-network-based IP distribution method

A distribution method and network technology, applied in electrical components, transmission systems, etc., to achieve the effect of simple and efficient verification methods

Inactive Publication Date: 2016-12-21
PHICOMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art of SDN, there is still no scheme that can realize the detection method of the fake DHCP server in the network

Method used

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Embodiment Construction

[0025] As mentioned in the background art, how to simply and effectively detect a fake DHCP server in an SDN network is a problem generally concerned by those skilled in the art.

[0026] Therefore the present invention receives a reply message from the DHCP server in the SDN network through the SDN switch, and forwards the reply message to the SDN controller, and the SDN controller verifies the legitimacy of the DHCP server according to the reply message, thereby enabling Simply and efficiently detect whether there is a fake DHCP server in the SDN network.

[0027] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modificatio...

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Abstract

The invention discloses an SDN-network-based IP distribution method. The method comprises: when a DHCP server receives an IP distribution request from an SDN network, reply information is sent to an SDN switch; the SDN switch forwards the relay information to an SDN controller; the SDN controller verifies legality of the DHCP server based on the reply information; and after successful verification, the SDN controller informs the SDN switch to forward the rely information, so that whether a pseudo DHCP server exists in an SDN network can be identified automatically.

Description

technical field [0001] The present invention relates to the technical field of SDN network, in particular to an IP allocation method based on SDN network. Background technique [0002] If there is a privately configured DHCP server in the network, when the client terminal applies for an IP address, it will send a DHCP Discover message in the form of a broadcast packet, and all the DHCP servers in the network will respond by sending out a DHCP Offer message. The client terminal can only process one of the DHCP Offer messages, and process the first received DHCP Offer message. If the received DHCP Offer message is sent by a privately configured DHCP server, the client will obtain a wrong IP address. This private DHCP server is called a pseudo-DHCP server. [0003] The false DHCP server detection technology of the traditional network is to configure trusted ports and untrusted ports on the forwarding nodes in the network, and only the DHCP server with trusted ports can provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L29/06
CPCH04L63/08H04L63/1466H04L63/1491H04L61/5014
Inventor 翟跃
Owner PHICOMM (SHANGHAI) CO LTD
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