SDN network cross-domain communication method based on virtual node technology

Abstract

The invention discloses an SDN network cross-domain communication method based on a virtual node technology. The method comprises the steps that a system is initialized; a credible cross-domain communication service is used, and a set of standard interfaces are provided for controllers; the controller in each network domain is connected with the cross-domain communication service through an interface provided by the cross-domain communication service; the cross-domain communication service collects device and link information controlled by the controller in each network domain; according to the collected device link information, the cross-domain communication service virtualizes nodes in other reachable domains to virtual nodes in the domain for different controllers; the cross-domain communication service synchronizes the virtual nodes to each controller, and the controller generates a virtual topology view; and each controller develops a forwarding policy according to the virtual topology to realize cross-domain communication. According to the invention, software is used to define the flexibility of a network; cross-domain communication is realized by using the virtual nodes andthe virtual topologies; the topological privacy of each domain is protected; and the forwarding efficiency is improved.

Description

technical field [0001] The invention relates to a software-defined network cross-domain communication technology, in particular to an SDN network cross-domain communication method based on virtual node technology. Background technique [0002] Software Defined Network (Software Defined Network) is a new type of network architecture. Its biggest feature is to decouple data from the control plane. The data plane only forwards data, and all control and management functions are concentrated on the control plane. The core of the control plane lies in the SDN controller. [0003] At first, there was only a single-controller architecture in the SDN architecture, but due to the performance limitations of a single controller, a multi-controller architecture in which multiple controllers control multiple network domains and cooperate with each other appeared. The multi-controller architecture solves the problems of insufficient computing power, insufficient bandwidth, and single poin...

AI Technical Summary

Problems solved by technology

The disadvantage of the first solution is that the controllers synchronize data with each other, which leaks the topology data inside the controller, which has a large security risk, and when the network is large, the controller needs a large overhead in routing calculations; the second solution The disadvantage of the solution is that each controller needs to ask the super controller for help when making cross-domain decisions, and the whole decision-making process will appear slow

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