SDN network architecture, and SDN-based traffic forwarding control method and device

Abstract

The invention discloses an SDN architecture, which comprises a controller, a plurality of switches connected with one another and network detectors, and is characterized in that the switches are connected with the network detectors through interfaces; the controller is used for creating a detection VLL on each link connected with the switches; the network detectors are used for acquiring SLA information of a link by using the detection VLL and reporting the acquired SLA information of the link to the controller; the controller is also used for selecting SLA information for path calculation according to the type of the traffic to be transmitted, determining a forwarding path meeting the service requirement, adding the forwarding path into a flow table, and issuing the forwarding path to each switch on the path; and the switches are used for forwarding the flow according to the forwarding path in the flow table. The invention further discloses an SDN-based traffic forwarding control method and device. By utilizing the architecture, the method and the device, the requirements of different services on network transmission can be met.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to an SDN network architecture, and also to an SDN-based traffic forwarding control method and device. Background technique [0002] SDN (Software Defined Networking, software-defined network) is an innovative new network architecture compared to traditional networks. It aims to achieve a complete separation of the data plane and control plane of network devices, and has many advantages over traditional networks. The current SDN network generally has the following form: a controller or cluster is responsible for collecting topology, traffic and other information of the entire network, calculating the traffic forwarding path, and sending the forwarding table items to the switch through the OpenFlow protocol, and the switch performs forwarding according to the table items action. Corresponding to the controller, the switch that performs the forwarding action is gener...

AI Technical Summary

Problems solved by technology

The IGP routing protocol can only select a forwarding path based on the shortest path cost. BGP can select an AS (Autonomous System, autonomous system) based on attributes such as local preference (local-preference), weight (weight), and multi-exit distinction (med). ) paths within or between ASs, but the results of these path calculations are limited, not end-to-end, so they cannot be applied to SDN

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