Area control equipment, domain control equipment and control system for SDN (Software Defined Networking)

Abstract

The invention discloses area control equipment, domain control equipment and a control system for SDN (Software Defined Networking). The area control equipment is used for collecting equipment state and network topology information of a data plane, and comprises an area host management module, a link discovery module, an area topology management module and an area routing computation module. The domain control equipment is used for collecting a network state and information mastered by a lower-layer controller and acquiring network information mastered by other domain controllers in a distributed way, and comprises a domain host management module, a domain topology management module and a domain routing computation module. Super-linear growth of SDN controller plane computation complexity is lowered to linear growth through construction of an abstract hierarchical view, thereby solving the expandability problem of a control plane in a control domain when the SDN is applied to a large-scale network.

Description

technical field [0001] The present invention relates to the technical field of the Internet, and in particular, relates to an area control device, a domain control device and a control system for an SDN network. Background technique [0002] Software Defined Networking (Software Defined Networking, SDN) is a new type of network architecture. Its design concept is to separate the control plane of the network from the data forwarding plane, so as to realize programmable control through the software platform in the centralized controller. The underlying hardware enables flexible on-demand deployment of network resources. In an SDN network, network devices are only responsible for simple data forwarding, and general-purpose hardware can be used, while the original operating system responsible for control will be refined into an independent network operating system, which is responsible for adapting different service characteristics, and the network operating system and Communic...

AI Technical Summary

Problems solved by technology

[0008] Hierarchical centralized architecture Since the top layer is a centralized controller, when the geographical location of the switch is far from the controller, the transmission delay is too long, which will lead to the accumulation of message processing on the control plane, resulting in a sharp decline in the processing capacity of the control plane, which in turn causes the message processing storm

At the same time, the hierarchical centralized architecture cannot solve the problem that as the network scale grows, the number of processed packets increases quadratically and the processing capacity of the control plane increases linearly.

In addition, the hierarchical centralized architecture also has a single point of failure problem

[0009] Although the above two control plane architectures can improve the scalability of the SDN control plane to a certain extent, when they are applied to large-scale networks, they still cannot solve the scalability problem of the control plane.

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