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A flow control method and switching device

A switching device and flow control technology, applied in the network field, can solve problems such as network performance degradation, throughput rate decrease, and average delay increase

Active Publication Date: 2021-09-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the PFC mechanism, the downstream switching device sends backpressure frames to the upstream switching device, causing a large number of switching devices in the network to suspend sending packets, causing congestion to spread, leading to a decrease in throughput and an increase in average delay, which in turn leads to a decrease in the performance of the entire network

Method used

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  • A flow control method and switching device
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  • A flow control method and switching device

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Embodiment Construction

[0039] The invention discloses a flow control method. The communication network used by the method can be a network constructed by Ethernet or infiniband technology. The Ethernet refers to standard Ethernet, Fast Ethernet or subsequent evolved Ethernet. First, an introduction to communication networks, see image 3 , the communication network includes a host, a switching device, and a server. The number of hosts, switching devices and servers can be one or more. A switching device can be a switch or a bridge device. A switch is a network device used to forward optical or electrical signals. It can provide exclusive electrical signal path or optical signal path for any two network nodes connected to the switch.

[0040] The host can be a mobile terminal (including but not limited to notebook, mobile phone, tablet, PDA, POS machine, MP3, navigator), a fixed terminal (including but not limited to desktop, printer, fax machine, digital projection, digital TV) or devices such ...

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Abstract

The invention discloses a flow control method, comprising: a first switching device determines a key flow from a plurality of data flows when congestion is detected, generates a back pressure message including the flow attribute value of the key flow, and converts the back pressure message to Send to the upstream device of the key flow, the upstream device of the key flow suspends sending the key flow, and the back pressure message does not affect the upstream device of the key flow to send other data flows except the key flow. The present invention also provides a switching device capable of implementing the above flow control method. The invention can effectively alleviate congestion and avoid packet loss, and can effectively control congestion diffusion, thereby improving the data exchange performance of the network.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a flow control method and switching equipment. Background technique [0002] Flow control can effectively prevent the impact of a large amount of instantaneous data on the network and ensure efficient and stable operation of the user network. [0003] Priority-based flow control (English: priority-based flow control, referred to as PFC), also known as priority-based pause (English: per priority pause) or class-based flow control (English: class basedflow control, referred to as CBFC), It is an enhancement to the existing Ethereum Pause mechanism. In the PFC mechanism, the sending end is set with several sending queues with different priorities, and the receiving end is set with receiving queues corresponding to the sending queues. For sending queues with different priorities, the receiving end can control them through a separate back pressure frame (back pressure frame), which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/825H04L12/851H04L47/30H04L47/41
CPCH04L47/2483H04L47/266H04L47/11H04L47/24H04L47/30H04L47/26H04L47/2433H04L47/25H04L47/263H04L47/41
Inventor 沈利周洪刘和洋
Owner HUAWEI TECH CO LTD
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