QoS Policing Token Bucket Time Interval (Tc)

The replenishment of tokens is determined by the Tc (Time interval), which influences the rate at which tokens are added.

The relationship between the CIR (Committed Information Rate), Bc (Committed Burst Size), and Tc is denoted by the formula:

Tc = Bc / CIR

For instance, with a CIR of 128,000 bps and a Tc of 0.25 seconds, the Bc is calculated as

Bc = Tc * CIR = 0.25 seconds * 128,000 bps = 32,000 bits or 4,000 bytes

This Bc value represents the maximum amount of data that can be sent during one Tc, aligning with the CIR.

Adjustments to the Tc can be made by modifying the Bc, thus indirectly affecting Tc through the relationship Bc = Tc * CIR. The proper use of the token bucket policing mechanism is crucial for maintaining network performance and ensuring fair bandwidth distribution across users and applications.

https://networklessons.com/quality-of-service/policing-configuration-example/