Communication method and device for SDN (Software Defined Network) and non-SDN

Abstract

The invention discloses a communication method for an SDN (Software Defined Network) and a non-SDN. The SDN comprises an SDN controller and SDN forwarding equipment. The method comprises the following steps: receiving a first ARP (Address Resolution Protocol) request forwarded by the SDN forwarding equipment, and judging whether a forwarding entry matched with the first ARP request exists on the SDN controller or not according to the first ARP request; if not, initiating a second ARP request; receiving a second ARP response of the second ARP request, generating a forwarding flow table according to the first ARP request and the second ARP response, and calculating a forwarding path from a source host to a target host; and issuing the forwarding flow table to the SDN forwarding equipment on the forwarding path, and forwarding a data message according to the forwarding flow table by the SDN forwarding equipment. The invention also discloses a communication device for the SDN and the non-SDN. Through implementation of the scheme, configuration in a communication process between the SDN and the non-SDN can become more flexible.

Description

technical field [0001] The present invention relates to the communication field, in particular to a communication method and device between an SDN network and a non-SDN network. Background technique [0002] SDN (Software Defined Network, Software Defined Network) is a new network innovation architecture, one of the core technologies is OpenFlow technology, which realizes flexible control of network traffic by separating the control plane of network equipment from the forwarding plane , providing good technical conditions for the innovation of network applications. [0003] OpenFlow is a new type of network technology, which realizes the control of network processing behavior by users or programs through flow tables. The OpenFlow network realizes the separation of the data forwarding layer and the control layer. Among them, the OpenFlow switch realizes the forwarding of the data layer, and the SDN controller realizes the function of the control layer. The controller contr...

AI Technical Summary

Problems solved by technology

The traditional network can clearly layer the network and process independently based on the layer, but there are also some problems. For example, when the information points belonging to two network segments communicate, they need to be forwarded through the "gateway". The replacement of MAC addresses on all gateways along the way will undoubtedly increase the processing delay and end-to-end processing complexity, and static routes or dynamic negotiation routes need to be established between gateways to realize information points between gateways and network segments intercommunication

Then, in the communication process between the SDN network and the traditional network, that is, the non-SDN network, the network form needs to be configured independently on each device, and the configuration between devices needs to be strictly corresponding and coordinated, which requires high skills for the operator. It is easy to make mistakes, it is difficult to record and visualize the configuration as a whole, it is difficult to change the configuration, and it cannot adapt to today's requirements for network visualization, automation, flexibility, agility, linkage and intelligence

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