Exchanger and method for controlling flow of same

A flow control and switch technology, applied in the field of communication, can solve the problems of reducing the sending rate, reducing the overall traffic forwarding rate of the switch, and reducing the forwarding performance of the whole machine.

Inactive Publication Date: 2011-04-13
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] When an individual port of the switch is congested, the switch sends a PAUSE frame to the traffic sender of the port, reducing the sending rate of all traffic sent from the port to the switch, resulting in a decrease in the overall traffic forwarding rate of the switch. Forwarding performance drops

Method used

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  • Exchanger and method for controlling flow of same
  • Exchanger and method for controlling flow of same
  • Exchanger and method for controlling flow of same

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Embodiment Construction

[0049] When traffic congestion occurs on individual outgoing ports of the switch in the prior art, the switch sends a PAUSE frame defined by IEEE802.3 to the traffic sender, so that the traffic sender that receives the PAUSE frame reduces the sending rate of all messages sent to the switch , which further leads to the problem that the forwarding performance of the whole switch is reduced. The present invention provides a flow control method for a switch. The core idea is to provide an extended PAUSE frame. The PAUSE frame contains in the reserved byte field the Port congestion traffic information, that is, the destination MAC address of the packets that cause congestion on the egress port of the switch. When congestion occurs on the egress port of the switch, the switch sends a PAUSE frame to the traffic sender that causes the congestion on the egress port through the ingress port, and the PAUSE frame carries the destination MAC address of the packet that causes the congestion ...

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Abstract

The invention provides a method for controlling the flow of an exchanger, comprising the following steps of: acquiring an MAC (Multi-Access Computer) address corresponding to an output port by utilizing the exchanger when the blockage of the output port is detected; sending an expanded PAUSE frame with the MAC address to a sender of the flow causing the blockage of the port by using an input port so as to reduce the speed of sending the target MAC address to the sender of the flow causing the blockage of the port and reduce the flow transmitting speed of the blocked port without influencing the flow transmitting speeds of other ports of the exchanger.

Description

technical field [0001] The invention relates to the communication field, in particular to a flow control method of a switch and a switch. Background technique [0002] IEEE 802.3 (Institute of Electrical and Electronics Engineers 802.3, local area network protocol of the American Institute of Electrical and Electronics Engineers) describes the implementation method of the MAC sublayer of the physical layer and the data link layer, and adopts CSMA / CD at various rates on various physical media (Carrier Sense Multiple Access / Collision Detect, carrier sense multiple access / collision detection) access mode for data transmission. IEEE 802.3 specifies a MAC (Media Access Control, Media Access Control) Control (control) frame. The MAC Control frame is a special type of frame used to exchange MAC Control information between devices. Its structure is similar to that of ordinary Ethernet The same as the network frame, its format is shown in Table 1: [0003] Table 1 [0004] [0...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/811
Inventor 任俊峰周迪
Owner NEW H3C TECH CO LTD
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