Method and system for link congestion detection and bandwidth control in three-level Clos network architecture

A technology for congestion control and link congestion, applied in the field of optical network communication, which can solve problems such as cell loss and buffer structure congestion.

Active Publication Date: 2016-07-13
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

[0014] The technical problem to be solved by the present invention is that in the three-level Clos network cell switching architecture, the output link binding failure cannot be pr

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  • Method and system for link congestion detection and bandwidth control in three-level Clos network architecture

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Embodiment Construction

[0055] The present invention provides a method and system for link congestion detection and bandwidth control in a three-level Clos network architecture. The output link of the switching plane is detected by the output link congestion detection device arranged on each switching plane (FabricPlane). Whether the binding causes congestion. When congestion is detected, a congestion control notification message is sent to all source FAPs. All source FAPs adjust the link bandwidth output to the corresponding switching plane according to the congestion control notification message. Reduce bandwidth for outgoing traffic. The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0056] image 3 It is a schematic diagram of a three-level Clos network architecture switching system provided by the present invention, and this embodiment adopts a single switching plane.

[0057] Such as image 3 As shown, this embodiment...

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Abstract

The invention discloses a method and a system for link congestion detection and bandwidth control in a three-level Clos network architecture. The congestion detection method comprises the following steps: each fabric plane regularly detects effectiveness of bidirectional link interconnection between an input link and an output link through a heartbeat signal; the remaining cache capacity of each output link is calculated in real time, and thus, the output cache congestion condition of each output link bundle and the output link bundle cache state are acquired; according to a bandwidth ratio of all effective input links from a source FAP to the fabric plane to all effective output links from a destination FAP to the fabric plane, whether the output link bundle congestion happens or not is judged, and if congestion happens, a control notification message for cancelling the congestion or enabling the congestion is sent to a corresponding source FAP according to the output cache congestion condition of each output link bundle and the output link bundle cache state.

Description

technical field [0001] The invention relates to the technical field of optical network communication, in particular to a method and system for link congestion detection and congestion control based on a three-level Clos network architecture. Background technique [0002] With the continuous rapid development of the Internet and its data services, the capacity requirements of the switching and routing systems in the Internet are also getting higher and higher. In order to solve the demand for data exchange and transmission, the switching structure, which is the core of the switching and routing system, is also showing a trend of becoming more and more complex. Single-stage switching structures such as crossbar switching can no longer meet the high-capacity switching requirements alone; therefore, larger-scale multi-level and multi-plane switching structures have been more applied. The multi-level multi-plane switching system integrates multiple switching structures and input...

Claims

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Application Information

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IPC IPC(8): H04L12/801H04L12/835H04L12/24H04L12/26H04L47/30
CPCH04L41/0631H04L43/0805H04L43/0882H04L43/10H04L47/12H04L47/127H04L47/30
Inventor 黄元波张艳张伟
Owner FENGHUO COMM SCI & TECH CO LTD
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