Software defined network (SDN) broadcast processing method based on cycle trigger agent

A host and network access technology, applied in digital transmission systems, electrical components, transmission systems, etc.

Inactive Publication Date: 2013-07-17
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on the software-defined network (Software Defined Network, SDN) architecture and compatible with the existing broadcast service discovery protocol, this solution solves the problem of terminal access perception and records host information on the controller and updates the host information table, completely eliminating Ethernet ARP broadcast in

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  • Software defined network (SDN) broadcast processing method based on cycle trigger agent
  • Software defined network (SDN) broadcast processing method based on cycle trigger agent
  • Software defined network (SDN) broadcast processing method based on cycle trigger agent

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Embodiment Construction

[0011] In order to solve the problem of ARP broadcasting in the Ethernet, by establishing the IP-to-MAC table of the host information of the whole network at the initial stage of the host accessing the network, the ARP request of any host in the network can be responded by the control terminal uniformly, thus avoiding the network-wide flooding. The module is divided into three parts:

[0012] 1. Host information registration stage

[0013] Host access to the network adopts two modes: Dynamic Host Configuration Protocol (DHCP) or static IP address configuration. If the host adopts DHCP, it will send out a DHCPDISCOVERY message at startup, and the controller processes the DHCP message, and records the mapping relationship between the host’s IP address and MAC address and the location information of the host when it finally receives the DHCPACK; if the host adopts static configuration, most Most host operating systems will generate a gratuitous ARP request. The switch receives ...

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Abstract

The invention provides a software defined network (SDN) broadcast processing method based on a cycle trigger agent. The method solves the problem of address resolution protocol (ARP) broadcast in the Ethernet. Whole network host information hash tables (IP-to-MAC and MAC-MAP) are established at the initial stage of accessing a host to a network, and an update strategy for the IP-to-MAC table and the MAC-MAP table is raised, so that a control end can uniformly respond to the ARP request of any host in the network, and flooding of the whole network is avoided. The method is applied to a screen of a random centralized network architecture, and has the characteristics of eliminating the ARP broadcast in the Ethernet, reducing the network traffic and the host load pressure, effectively preventing dynamic host configuration protocol (DHCP) spoofing, avoiding ARP spoofing, supporting the motion of the host and the like.

Description

technical field [0001] The low-cost, high-efficiency transmission and "plug and play" characteristics of Ethernet technology make it occupy a dominant position in the local area network. However, Ethernet's initial broadcast-based service discovery mechanism (such as Dynamic Host Configuration Protocol, DHCP and Address Resolution Protocol, ARP, etc.) severely limits its application in large-scale data center networks and metropolitan area networks. The reasons are as follows: 1) a large number of broadcast packets occupy the effective bandwidth resources in the network; 2) when there is a loop in the network, it is easy to cause a broadcast storm. The current solution is to use the STP protocol to divide the network into trees by establishing a root bridge. The structure avoids loop, but it has the following defects: a) the traffic pressure near the root bridge is too large; b) the redundant link resources in the network are wasted (making the originally possible multipath tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L12/801
Inventor 刘江王健黄韬赵伟辰杨守仁陈建亚刘韵洁
Owner BEIJING UNIV OF POSTS & TELECOMM
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