Hi Resfat,
CAR has three parameters as Rate limits,
Rate limits define which packets conform or exceed based on the three parameters: average rate, normal burst size, and excess burst size:
The average rate determines the long-term average transmission rate. Traffic that falls under this rate will always conform.
The normal burst size determines how large traffic bursts can be before some traffic exceeds the rate limit.
The excess burst size determines how large traffic bursts can be before all traffic exceeds the rate limit.
Traffic that falls between the normal burst size and the excess burst size exceeds the rate limit with a probability that increases as the burst size increases.
Go thro. this link which will explain the mechanism of determining these three parameters,
http://www.cisco.com/warp/public/732/Tech/car/
Rate if it does,
Rgs.
