Traffic control method and device for switch service flow

Abstract

The invention discloses a traffic flow control method of a switch service flow, comprising: monitoring the instant value of the total flow of the service flow at the outlet port of the switch; judging whether the total flow of the service flow is congested according to the instant value of the total flow of the service flow; The judgment result adjusts the flow rate limit value of the service flow at the ingress port of the switch according to the weight ratio of the service flow, so as to realize flow control on the service flow. The invention also discloses a flow control device for exchange service flow. By applying the present invention, when the flow rate of the high-priority service flow is low, the flow rate limit value of each service flow at the ingress port of the switch can be dynamically adjusted, and the remaining bandwidth of the high-priority service flow can be used to provide additional bandwidth for other service flows. Bandwidth, which effectively utilizes the bandwidth resources in the switch; and because the flow of each service flow is limited at the ingress port, the forwarding channel when forwarding across chips and the backplane bandwidth when forwarding across service boards are saved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a flow control method and device for service flow of an exchange. Background technique [0002] The traditional way to control the flow of switch ports is fixed. That is, when traffic of multiple service flows forwarded by a certain switch is congested, CAR (Committed Access Rate, Committed Access Rate) speed limit is performed on the traffic of different service flows at the ingress port of the switch. Combined with the schematic diagram of switch traffic congestion shown in Figure 1, service flow A and service flow B are two service flows with different priorities, and they all go upstream through the egress port Y, assuming that the priority of service flow B is higher than that of service flow priority of A, and service flow A arrives at inbound port X before service flow B, and if traffic congestion occurs on outbound port Y at this time, the switch discards part of ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flow control method for the service flow of a switch, so as to overcome the problem that the flow control method in the prior art is easy to waste flow bandwidth or forwarding resources

[0006] Another object of the present invention is to provide a flow control device for switch service flow, so as to overcome the problem that the flow control device in the prior art tends to waste traffic bandwidth or forwarding resources

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