Flow control method and system, and centralized controller

Abstract

The embodiment of the invention provides a flow control method and system, and a centralized controller, and relates to the technical field of communication. The problem that flow is only forwarded according to an IP path in a flow dredging process, resulting in that the flow transmission effect cannot meet the actual demands of a user to the business quality in the prior art is solved. The method comprises the following steps: a network edge device sends network monitoring information of a user terminal to the centralized controller, wherein the network monitoring information comprises a flow type and an occupied bandwidth; a network forwarding device sends link delay information to the centralized controller, wherein the link delay information comprises a residual bandwidth of the link and a link transmission delay; the centralized controller determines a target forwarding path according to the network monitoring information sent by the network edge device, the link delay information sent by the network forwarding device and business demand information, and releases the target forwarding path and a flow control strategy to a network device. The flow control method and system, and the centralized controller provided by the invention are applied to flow control.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a flow control method, system and centralized controller. Background technique [0002] At present, the traffic in the network is channeled according to the routing protocol, and the mainstream routing protocols such as BGP, ISIS, OSPF, etc. all adopt distributed control, that is, each network device has both the control plane and the forwarding plane. Each network device collects nearby network information by exchanging routing protocol packets, and then generates its own forwarding entry. After receiving the data flow, each device performs lookup table matching and forwarding based on the second and third layer information of the data flow according to its own forwarding table entry. [0003] Another emerging way of organizing networks is software-defined networking, or SDN. It separates and centralizes the control plane of each network device to a dedicated device, th...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a traffic control method, system, and centralized controller, which solves the problem that in the prior art, in the process of traffic grooming, traffic forwarding is only performed according to the IP path, and the traffic transmission effect cannot satisfy the user's requirements for business. The question of actual demand for quality

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