Bandwidth-Limit (Policer) - Juniper EX9200 Features Manual

bandwidth-limit (Policer)

Syntax
Hierarchy Level
Release Information
Description
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Copyright © 2016, Juniper Networks, Inc.
bandwidth-limit bps;
[edit dynamic-profiles profile-name firewall
[edit firewall policer policer-name if-exceeding],
[edit logical-systems logical-system-name
Statement introduced before Junos OS Release 7.4.
Support at the
[edit dynamic-profiles ... if-exceeding]
OS Release 11.4.
Statement introduced in Junos OS Release 12.3R2 for EX Series switches.
For a single-rate two-color policer, configure the bandwidth limit as a number of bits per
second. Single-rate two-color policing uses the single token bucket algorithm to measure
traffic-flow conformance to a two-color policer rate limit.
Traffic at the interface that conforms to the bandwidth limit is categorized green. Traffic
that exceeds the specified rate is also categorized as green provided that sufficient tokens
remain in the single token bucket. Packets in a green flow are implicitly marked with
packet loss priority (PLP) and then passed through the interface.
Traffic that exceeds the specified rate when insufficient tokens remain in the single token
bucket is categorized red. Depending on the configuration of the two-color policer, packets
in a red traffic flow might be implicitly discarded; or the packets might be re-marked with
a specified forwarding class, a specified PLP, or both, and then passed through the
interface.
NOTE: This statement specifies the bandwidth limit as an absolute number
of bits per second. Alternatively, for single-rate two-color policers only, you
can use the bandwidth-percent percentage
bandwidth limit as a percentage of either the physical interface port speed
or the configured logical interface shaping rate.
Single-rate two-color policing allows bursts of traffic for short periods, whereas single-rate
and two-rate three-color policing allows more sustained bursts of traffic.
Hierarchical policing is a form of two-color policing that applies different policing actions
based on whether the packets are classified for expedited forwarding (EF) or for a lower
priority. You apply a hierarchical policer to ingress Layer 2 traffic to allows bursts of EF
traffic for short period and bursts of non-EF traffic for short periods, with EF traffic always
taking precedence over non-EF traffic.
—You can specify the number of bits per second either as a decimal number or as a
bps
decimal number followed by the abbreviation
(1,000,000,000).
Range:
Chapter 18: Configuration Statements
policer policer-name if-exceeding],
policer policer-name if-exceeding]
hierarchy level introduced in Junos
statement to specify the
(1000), (1,000,000), or
k m
low
g
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