Flow control method and forwarding unit

Abstract

The invention discloses a flow control method and a forwarding unit, applicable to a device comprising at least one forwarding unit. A local token set for controlling the flow speed of the forwarding unit is arranged on each forwarding unit, and a master control token set is further arranged on one forwarding unit in the device. The method comprises the following steps of: receiving a token application message by the forwarding unit provided with the master control token set; when the quantity of tokens in the master control token set is not zero, distributing the tokens for the corresponding forwarding units by the forwarding unit provided with the master control token set according to the token application message and the quantity of tokens in the master control token set, so that the quantity of the corresponding tokens of the master control token set can be reduced; and transmitting the distributed tokens to the corresponding forwarding unit by the forwarding unit provided with the master control token set through a token authorization message, so that the quantity of tokens of the local token set within the forwarding unit can be increased. After the flow control method and the forwarding unit are adopted, the global flow monitoring on a plurality of single boards or chips can be realized, and the single board or chip passing flow can not go beyond the flow which is allowed to pass.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a flow control method and a forwarding unit. Background technique [0002] Traffic monitoring is to control the traffic. By supervising the traffic rate entering the network, "punish" the excess traffic, so that the incoming traffic is limited within a reasonable range, so as to protect the network resources and the interests of operators. For example, HTTP packets can be restricted from occupying more than 50% of the network bandwidth. If the traffic of a certain connection exceeds the standard, traffic monitoring can choose to discard the packets or reconfigure the priority of the packets. Traffic monitoring is referred to as CAR (Committed Access Rate, committed access rate). [0003] A distributed device is a device that includes multiple boards. Chips are installed on the boards. Each board has the ability to send and receive packets independently, that is, each boar...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in view of the above situation, the CAR function is run on the single board, but the actual effect is still to control the flow of each single board, and it is impossible to realize the unified flow control of multiple single boards

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