Traffic Policing
The Cisco IOS Traffic Policing features allow the control and filtering of the incoming and outgoing traffic rate on
an interface, as well as network bandwidth management through the token bucket algorithm. Traffic that falls
within the defined parameters is sent, whereas traffic that exceeds or violates the parameters is dropped or
sent with a different priority.
Several policing techniques are available within the Traffic Policing technology:
Traffic Policing (Single-Rate Policer): Single-Rate Policer controls the input or output traffic rate for
class-based user-defined criteria.
Two-Rate Policer: Two-Rate Policer enforces Traffic Policing according to two separate rates: committed
information rate (CIR) and peak information rate (PIR). These two rates can be specified along with their
corresponding values by using the cir and pir keywords in the police command.
Policer Enhancements??”Multiple Actions: This feature further extends the functionality of the Traffic
Policing feature (Single-Rate Policer) and the Two-Rate Policer feature. With both features, there is a
limitation to specify only one conform action, one exceed action, and one violate action. With the new
Policer Enhancement "Multiple Actions" feature, multiple conform, exceed, and violate actions for the
marked packets can now be specified.
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