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

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...

AI Technical Summary

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 processed in time, causing the buffer structure on the link output corresponding to the switching plane to be congested, and even the cells will be blocked. The problem of being lost

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