Distributed flow control method for Ethernet switch

A technology of flow control and switch, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of switch SW1 whole machine switching performance degradation, etc., and achieve the effect of normal forwarding and fast flow control

Inactive Publication Date: 2013-02-13
HEFEI HUAYUN COMM TECH
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In summary, the existing technology has led to a declin

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  • Distributed flow control method for Ethernet switch
  • Distributed flow control method for Ethernet switch
  • Distributed flow control method for Ethernet switch

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[0026] See Figure 5 , Ethernet switch distributed flow control method, including the following steps:

[0027] a. The source switch sends a predetermined flow to the forwarding switch, which causes congestion in the forwarding switch; this predetermined flow is only related to the size of the flow, and has nothing to do with the content of the flow. This flow can cause congestion on the forwarding port of the forwarding switch. The source switch is the switch that sends traffic, and the forwarding switch is the switch that forwards the traffic. The congestion of the forwarding switch is the congestion of the forwarding port of the forwarding switch.

[0028] b. The forwarding switch organizes the destination address of the traffic passing through the congested port into a control message and sends the control message to the source switch; this is to let the source switch know which traffic is currently forwarded through the congested port of the forwarding switch .

[0029] c. The ...

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Abstract

The invention discloses a distributed flow control method for an Ethernet switch. The method comprises the following steps: a source switch sends certain flow to a forwarding switch so as to lead the forwarding switch to form congestion; the forwarding switch organizes destination addresses of flow passing through a congestion port into a control message, and sends the control message to the source switch; the source switch analyses the control message to excavate the destination addresses carried in the message, and stores the destination addresses in a destination address congestion table; the source switch determines whether a destination address of a flow to be sent is in the congestion table or not, if yes, the source switch firstly puts the flow to be sent into a sending buffer queue, and sends the flow to be sent after waiting for a predetermined time interval, and otherwise, the source switch sends the flow to be sent. The distributed flow control method for the Ethernet switch, provided by the invention, has the advantages that the efficiency of a flow control function of the Ethernet switch is improved, and the unnecessary whole switch interchangeability declining caused by the flow control can be avoided.

Description

technical field [0001] The invention relates to a distributed flow control method of an Ethernet switch. Background technique [0002] There is often traffic exchange in an Ethernet switch switched network. Such as figure 1 As shown, in a switching network composed of three Ethernet switches, the process of traffic switching is as follows: GE1 / 0 / 1 (GigabitEthernet1 / 0 / 1) on switch SW2 and GE1 / 0 / 1 on SW3 pass through the switch respectively GE1 / 0 / 2 and GE1 / 0 / 3 on SW1 send certain traffic to switch SW1, switch SW1 receives it, and forwards it through GE1 / 0 / 1 on it. At this time, GE1 / 0 / 1 of switch SW1 may be congested and packets may be discarded. This requires a method for flow control. [0003] The prior art provides a flow control method for the above problems. This method is derived from a MAC Control frame defined by IEEE 802.3. This frame has a MAC CONTROL OPCODE field. When the field is 00-01, its function is to request to stop sending the frame just sent in the next...

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Application Information

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IPC IPC(8): H04L12/801H04L12/931
Inventor 汪宇辰唐舜
Owner HEFEI HUAYUN COMM TECH
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