Multi-domain QoS path calculating method supporting privacy protection in SDN network

Abstract

The invention discloses a multi-domain QoS path calculating method supporting privacy protection in an SDN network, and the method comprises the following steps: enabling SDN controllers to apply for verification from a secret key management server, and obtaining a secret key; exchanging some basic network information between the SDN controllers; calculating a path with the shortest time delay; calculating a path with the lowest packet loss probability; calculating a path with the maximum bandwidth; calculating a multi-constraint QoS path employing a safe multi-side protocol between the SDN controllers; and enabling a source SDN controller to notify a controller of a domain passed by the QoS path of transmitting a flow table to an SDN switcher. According to the invention, the method achieves the calculation of an SDN domain passed by the communication of a source target main unit through the safe multi-side protocol. A specific in-domain path is managed by a controller responsible for each SDN domain. Therefore, the method can achieve the end-to-end QoS path calculation between multiple SDN domains, and also can protect the strategy and topological information of each domain network.

Description

technical field [0001] The invention relates to an Internet technology, in particular to a multi-domain QoS path calculation method supporting privacy protection in an SDN network. Background technique [0002] Different from the traditional network architecture, SDN decouples the control plane from the forwarding plane and adds an SDN controller. Generally, a single controller can be used in the network to complete the corresponding device management and network control functions, and there will be no obvious impact on performance. However, for a large-scale data center network and campus network, there are several domains, and a single The number of controllers affects the information interaction between the controller and the switch, thereby reducing the performance of the network. Therefore, it is necessary to expand the number of controllers, use multiple controllers for physical distribution, and logically manage the network in a centralized manner. Multiple controlle...

AI Technical Summary

Problems solved by technology

Generally, a single controller can be used in the network to complete the corresponding device management and network control functions, and there will be no obvious impact on performance. However, for a large-scale data center network and campus network, there are several domains, and a single The number of controllers affects the information interaction between the controller and the switch, thereby reducing the performance of the network. Therefore, it is necessary to expand the number of controllers, use multiple controllers for physical distribution, and logically manage the network centrally.

Multiple controllers can solve the performance improvement and expansion problems of the network, but there are still some problems

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