Traffic policing is a network management function that actively monitors and controls the rate of data traffic entering or exiting a network interface to ensure strict adherence to predefined bandwidth limits or traffic contracts. In high-speed crypto trading environments, it prevents network congestion caused by excessive data flows, safeguarding critical low-latency pathways for essential market data and order execution.
Mechanism
The mechanism involves continuously measuring the actual data rate of incoming traffic against a configured rate limit, which typically defines a committed information rate (CIR) and a burst size. If the traffic exceeds these predefined limits, policing actions are immediately taken, such as dropping excess packets or remarking their priority to a lower service class. Unlike traffic shaping, policing provides a strict, immediate enforcement of traffic contracts.
Methodology
Systems architects designing network infrastructure for institutional crypto options trading utilize traffic policing as a critical methodology for maintaining Quality of Service (QoS) and preventing network overload. This involves configuring precise rate limits on ingress and egress interfaces for different classes of traffic, ensuring that non-critical data does not monopolize bandwidth. Effective traffic policing guarantees the integrity and predictability of low-latency data streams, which is crucial for algorithmic trading strategies and managing real-time market data feeds.
QoS policies mitigate head-of-line blocking by classifying, prioritizing, and queuing traffic to ensure high-priority packets are not delayed by low-priority ones in mixed-bandwidth environments.
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