Cisco Cisco IOS Software Release 12.0(17)S

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This feature module describes the Frame Relay Traffic Policing feature. It includes information on the 
benefits of this new feature, supported platforms, related documents, and commands.

This document includes the following sections: 

Frame Relay Traffic Policing provides a mechanism to rate-limit packets on switched PVCs using a 
“leaky-bucket” implementation. When enabled, Traffic Policing prevents traffic congestion by 
discarding or setting the Discard Eligible (DE) bit on packets that exceed specified traffic parameters. 
Traffic Policing parameters can be specified per DCE interface, or per switched PVC, using the 'map 
class' mechanisms. 

The Frame Relay Traffic Policing prevents traffic congestion by treating traffic as either committed or 
excess. This section describes the parameters used to configure the way data is handled with Frame Relay 
Traffic Policing.

Committed traffic is that which fits within the committed burst allowed within a given time interval. 

Excess traffic is traffic which does not fit within the committed burst allowed within a given time 
interval.