A flow control method and forwarding unit

Abstract

The invention discloses a flow control method and a forwarding unit, which are applied to a device including at least one forwarding unit. Each forwarding unit is provided with a local token set for controlling the flow rate of the forwarding unit. A forwarding unit in the device also has a A master control token set is provided, and the method includes: a forwarding unit provided with a master control token set receives a token application message; when the number of tokens in the master control token set is not zero, a master control token set is provided The forwarding unit allocates tokens for the corresponding forwarding unit according to the token application message and the number of tokens in the master token set, and reduces the corresponding number of tokens in the master token set; there is a forwarding mechanism for the master token set The unit sends the allocated token to the corresponding forwarding unit through a token authorization message, so as to increase the number of tokens in the local token set in the forwarding unit. By adopting the present invention, it is possible to realize global traffic supervision on multiple single boards or chips, and prevent the traffic passing through the single boards or chips from exceeding the allowed traffic.

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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