Shaping and Policing
Traffic shaping and policing are both used to control the rate of traffic.
Shaping buffer traffic in a queue if the traffic rate goes over the configured rate.
Policing drops traffic if the traffic rate goes over the configured rate.
Policing also has the option of re-marking the traffic instead of dropping it.
'Burst' traffic over the configured rate is allowed for a short period of time.
This accommodates data applications which typically are 'bursty' in nature. Instead of a constant stream of data, they send data in bursts.
The amount of burst traffic allowed is configurable.
In both cases, classification can be used to allow for different rates for different kinds of traffic.
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