Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?




Hierarchy Level


For a two-rate three-color policer, configure the peak burst size (PBS) as a number of bytes. The PBS defines the maximum number of bytes of unused peak bandwidth capacity that can be accumulated. The accumulated bandwidth allows for moderate periods of bursting traffic that exceeds the peak information rate (PIR) and the committed burst size (CBS).


When you include the peak-burst-size statement in the configuration, you must also include the committed-burst-size and peak-information-rate statements at the same hierarchy level.

Two-rate three-color policers use a dual-rate dual token bucket algorithm to measure traffic against two rate limits.

  • A traffic flow is categorized green if it conforms to both the committed information rate (CIR) and the CBS-bounded accumulation of available committed bandwidth capacity.

  • A traffic flow is categorized yellow if exceeds the CIR and CBS but conforms to the PIR. Packets in a yellow flow are marked with medium-high packet loss priority (PLP) and then passed through the interface.

  • A traffic flow is categorized red if exceeds the PIR and the PBS-bounded accumulation of available peak bandwidth capacity. Packets in a red traffic flow are marked with high PLP and then either passed through the interface or optionally discarded.


bytes—Number of bytes. You can specify a value in bytes either as a complete decimal number or as a decimal number followed by the abbreviation k (1000), m (1,000,000), or g (1,000,000,000).

  • Range: 1500 through 100,000,000,000 bytes

Required Privilege Level

firewall—To view this statement in the configuration.

firewall-control—To add this statement to the configuration.