Excess-Burst-Size - Juniper EX9200 Features Manual

Traffic Policers Feature Guide for EX9200 Switches

excess-burst-size

Syntax
Hierarchy Level
Release Information
Description
Options
Required Privilege
Level
212
excess-burst-size bytes;
[edit dynamic-profiles profile-name firewall
[edit firewall three-color-policer
Statement introduced in Junos OS Release 7.4.
Support at the [edit dynamic-profiles ... single-rate]
Release OS 11.4.
Statement introduced in Junos OS Release 12.3R2 for EX Series switches.
For a single-rate three-color policer, configure the excess burst size (EBS) as a number
of bytes. The EBS allows for moderate periods of bursting traffic that exceeds both the
committed information rate (CIR) and the committed burst size (CBS).
NOTE: When you include the
you must also include the
committed-information-rate
Traffic that exceeds both the CIR and the CBS is considered nonconforming.
Single-rate three-color policing uses a dual token bucket algorithm to measure traffic
against a single rate limit. Nonconforming traffic is categorized as yellow or red based
on the excess-burst-size statement included in the policer configuration.
During periods of traffic that conforms to the CIR, any unused portion of the guaranteed
bandwidth capacity accumulates in the first token bucket, up to the maximum number
of bytes defined by the CBS. If any accumulated bandwidth capacity overflows the first
bucket, the excess accumulates in a second token bucket, up to the maximum number
of bytes defined by the EBS.
A nonconforming traffic flow is categorized yellow if its size conforms to bandwidth
capacity accumulated in the first token bucket. Packets in a yellow flow are marked with
packet loss priority (PLP) and then passed through the interface.
medium-high
A nonconforming traffic flow is categorized red if its size exceeds the bandwidth capacity
accumulated in the second token bucket. Packets in a red traffic flow are marked with
high PLP and then either passed through the interface or optionally discarded.
—Number of bytes. You can specify a value in bytes either as a complete decimal
bytes
number or as a decimal number followed by the abbreviation
(1,000,000), or (1,000,000,000).
m g
Range: 1500 through 100,000,000,000 bytes
firewall—To view this statement in the configuration.
firewall-control—To add this statement to the configuration.
three-color-policer
policer-name single-rate]
hierarchy level introduced in Junos
statement in the configuration,
excess-burst-size
committed-burst-size
statements at the same hierarchy level.
Copyright © 2016, Juniper Networks, Inc.
name single-rate],
and
k (1000),