Download Burst Size Calculator for QoS rate limiting calculations (metering and policing)
For ISP network engineers implementing QoS policy for rate limiting. That is metering and policing.
This will help you in determining the proper burst size; Normal burst (in bytes) or Extended Burst (in bytes). The higher the burst size, the better the quality of experience for your subscribers when the configured bandwidth is over-utilized.
This calculation is based on a formula provided by CISCO.
Burst-size limit is very important while implementing QoS policy. A policer burst-size limit controls the number of bytes of traffic that can pass unrestricted through a policed interface when a burst of traffic pushes the average transmit or receive rate above the configured bandwidth limit. The actual number of bytes of bursty traffic allowed to pass through a policed interface can vary from zero to the configured burst-size limit, depending on the overall traffic load.