Juniper EX9200 Series, Features Manual

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peak-burst-size
Syntax peak-burst-size bytes;
Hierarchy Level [edit dynamic-profiles profile-name firewall three-color-policer name two-rate ],
[edit firewall three-color-policer policer-name two-rate ]
Release Information Statement introduced in Junos OS Release 7.4.
Support at the
[edit dynamic-profiles ... two-rate] hierarchy level introduced in Junos OS
Release 11.4.
Statement introduced in Junos OS Release 12.3R2 for EX Series switches.
Description 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).
NOTE: 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.
Options 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.
Related
Documentation
Three-Color Policer Configuration Overview on page 145
•
•
Policer Bandwidth and Burst-Size Limits
227 Copyright © 2016, Juniper Networks, Inc.
Chapter 18: Configuration Statements