Bridge port expansion network and congestion control method thereof, port expander (PE) and control bridge

Abstract

The invention provides a bridge port expansion network and a congestion control method thereof, a port expander (PE) and a control bridge; the method comprises the following steps that: the PE detects the congestion of a first data message which is received and generates a detection result; when identifying the congestion according to the detection result, the PE constructs a congestion announcement message according to a first expansion tag in the head of the first data message, wherein the first expansion tag comprises the information of a first expansion channel, and the information of the first expansion channel is used for indicating the expansion channel for transmitting the first data message; and the PE sends the congestion announcement message to the control bridge, so that the control bridge adjusts the flow according to the first expansion tag in the congestion announcement message. According to the bridge port expansion network and the congestion control method thereof, the PE and the control bridge, the congestion prevention function of a business process engineering (BPE) network is realized, the congestion problem which is caused by the inconsistent input and output rate of the PE is prevented, and the network utilization rate is improved.

Description

technical field [0001] The invention relates to bridge port expansion technology, in particular to a bridge port expansion network and a congestion control method thereof, a port expander and a control bridge. Background technique [0002] The Bridge Port Extension (BPE) technology is defined and proposed by the 802 working group in the 802.1qbh standard. Through the BPE technology, a large number of complex bridge functions can be aggregated to a small number of control switches, and other switches can be controlled by ports. Extender (Port Extender, referred to as PE) instead. Under the BPE network architecture, usually a single Control Bridge (CB for short) and multiple PEs under the control of the CB form an extended bridge, and a connection is established between the CB and the PEs through frame forwarding. Devices in the network are connected through bridges, and all communication traffic between devices must be sent to the CB for table lookup and forwarding. PEs do n...

AI Technical Summary

Problems solved by technology

[0003] In the actual network communication process, the transmission rate of the input end and the output end of the PE may be different. When the output bandwidth is smaller than the input bandwidth, the data will not be transmitted according to the input speed, causing network congestion.

Since the congestion occurs on the PE, the PE does not have functions such as data forwarding and Quality of Service (QoS for short), and the CB cannot know where the congestion occurs, so it cannot implement flow control

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