A method and device for communication between an SDN network and a non-SDN network

Abstract

The invention discloses a communication method between an SDN network and a non-SDN network. The SDN network includes an SDN controller and an SDN forwarding device. The method includes: receiving a first ARP request forwarded by the SDN forwarding device, and according to the first ARP request. The ARP request judges whether there is a forwarding entry matching the first ARP request on the SDN controller; if not, initiates a second ARP request; receives the second ARP response of the second ARP request, according to the first ARP request. An ARP request and the second ARP response generate a forwarding flow table, and calculate the forwarding path between the source host and the target host; deliver the forwarding flow table to the SDN forwarding device on the forwarding path, the The SDN forwarding device forwards the data packet according to the forwarding flow table. The invention also discloses a communication device between an SDN network and a non-SDN network. By implementing the above solution, the configuration in the communication process between the SDN network and the non-SDN network can be made 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

Images