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S12700 V200R010C00 Configuration Guide - QoS

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, ACL-based simplified traffic policy, and HQoS.

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How Do I Set the CIR and CBS During Rate Limiting Configuration?

How Do I Set the CIR and CBS During Rate Limiting Configuration?

During rate limiting configuration, the committed information rate (CIR) and committed burst size (CBS) need to be set. The CIR is the guaranteed average transmission rate, and the CBS is the volume of burst traffic that can pass through an interface. To set the rate limit to 4 Mbit/s, set the CIR to 4096 kbit/s (4 x 1024 kbit/s). You are advised to set the CBS to be 100-200 times the CIR. If the CBS is not configured, the default value is used. When a single token bucket is used, the default CBS is 188 times the CIR. When dual token buckets are used, the default CBS is 125 times the CIR.

Updated: 2019-12-28

Document ID: EDOC1000142089

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