Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010, Руководство по настройке

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A higher value smooths out the average and slows WRED reaction to
congestion and decongestion, accommodating short bursts without dropping.
Too large a value can smooth the average to the point that WRED does not
react at all.
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A lower value speeds up WRED reaction. Too low a value can cause
overreaction to short bursts, dropping packets unnecessarily.
3.
(Optional) Set the minimum and maximum threshold for committed traffic.
host1(config-drop-profile)# committed-threshold percent 30 90 4
4.
(Optional) Set the minimum and maximum threshold for conformed traffic.
host1(config-drop-profile)# conformed-threshold percent 25 90 5
5.
(Optional) Set the minimum and maximum threshold for exceeded traffic.
host1(config-drop-profile)# exceeded-threshold percent 20 90 6
The thresholds specify a linear relationship between average queue length and
drop probability.
You can express thresholds as either percentages of maximum queue size by
including the keyword
percent , or as absolute byte values by omitting the
keyword.
Related Topics
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Configuring WRED on page 31
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Monitoring RED and WRED on page 36
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average-length-exponent
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committed-threshold
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conformed-threshold
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drop-profile
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exceeded-threshold
Example: Configuring Average Queue Length for RED
To enable calculation of average queue length, create a drop profile with a nonzero
average-length exponent, reference the drop profile within a QoS profile, and attach
the QoS profile to an interface.
The following drop profile enables the average queue length calculation, but does
not initiate RED dropping behavior:
host1(config)# drop-profile averageOnly
host1(config-drop-profile)# average-length-exponent 10
Related Topics
Configuring RED on page 27
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Example: Configuring Average Queue Length for RED
JUNOSe 11.1.x Quality of Service Configuration Guide