Dynamic host configuration method and system in software defined network

Abstract

The invention provides a dynamic host configuration method and system in a software defined network. The method comprises the following steps that: a controller computes virtual network configuration in an entire physical network, and transmits the virtual network configuration to an OpenFlow switch by using an OpenFlow protocol to form a plurality of virtual networks in the entire physical network; the OpenFlow switch receives a flow table control command issued by the controller, and performs matching rule configuration on an own flow table according to the flow table control command; the OpenFlow switch receives data packets from other OpenFlow switches or hosts, processes the data packets according to a matching rule recorded by the own flow table and the attributes of the data packets, and outputs a DHCP (Dynamic Host Configuration Protocol) data packet needing to be forwarded; and the OpenFlow switch forwards the DHCP data packet to the controller, a destination OpenFlow switch or a destination host. Through adoption of the dynamic host configuration method and system, centralized dynamic configuration of an access host in a multiple virtual overlay network is realized; the network efficiency is increased; and the problem of increase of the network complexity due to the multiple virtual overlay network in the software defined network is solved.

Description

technical field [0001] The invention belongs to the technical field of computer networks, and relates to a dynamic host configuration method and system in a software-defined network. Background technique [0002] Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, DHCP) is a communication protocol that enables network administrators to centrally manage and automatically assign IP network addresses. It uses the UDP (User Datagram Protocol) protocol to work. There are two main One purpose: to enable the internal network or network service provider to automatically assign IP addresses to users; to provide internal network administrators as a means of central management of all computers. In an IP network, each Internet-connected device needs to be assigned a unique IP address. DHCP enables network administrators to monitor and assign IP addresses from a central point. When a computer moves to another location in the network, it can automatically receive a...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a dynamic host configuration method and system in a software-defined network, which is used to solve the problem that in the prior art, the hosts accessed in multiple virtual overlay networks cannot be configured dynamically in a centralized manner. The problem

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