What Are Experiential Values of CBS and PBS When CAR Is Configured on Interfaces?
In most cases:
If the peak information rate (PIR) is configured and the PIR and CIR are different, the committed burst size (CBS) is 125 times greater than the committed information rate (CIR), and the peak burst size (PBS) is 125 times greater than the PIR.
If the PIR is not configured or the PIR and CIR are the same, the CBS is 188 times greater than the CIR, and the PBS is 313 times greater than the CIR.
The CIR value is expressed in kbit/s, and the CBS and PBS values are expressed in Bytes.