Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010, Configuration Manual

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Dropping Behavior Overview on page 25
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RED and WRED Overview on page 26
Example: Configuring Dropping Thresholds for RED
You can specify different dropping behavior for committed (green), conformed
(yellow), and exceeded (red) packets by specifying a minimum queue threshold,
maximum queue threshold, and maximum drop probability for each color of traffic.
By default, conformed threshold and exceeded threshold take the same values as
the committed threshold. Therefore, if you specify only a committed threshold,
conformed and exceeded traffic is treated like committed traffic. Similarly, if you
specify a conformed threshold without an exceeded threshold, exceeded traffic is
treated like committed traffic.
The following drop profiles result in identical behavior:
host1(config)# drop-profile colorblind1
host1(config-drop-profile)# committed-threshold percent 30 90 5
host1(config-drop-profile)# exit
host1(config)# drop-profile colorblind2
host1(config-drop-profile)# committed-threshold percent 30 90 5
host1(config-drop-profile)# conformed-threshold percent 30 90 5
host1(config-drop-profile)# exit
host1(config)# drop-profile colorblind3
host1(config-drop-profile)# committed-threshold percent 30 90 5
host1(config-drop-profile)# conformed-threshold percent 30 90 5
host1(config-drop-profile)# exceeded-threshold percent 30 90 5
Related Topics
Configuring RED on page 27
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Dropping Behavior Overview on page 25
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RED and WRED Overview on page 26
Example: Configuring Color-Blind RED
You can configure RED so that packets are dropped without regard to color. To do
so, you combine a drop profile that has a committed threshold configured with a
queue profile that specifies the same queue length for committed, conformed, and
exceeded packets, as shown in Figure 3 on page 30.
Example: Configuring Dropping Thresholds for RED
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Chapter 4: Configuring Dropping Behavior with RED and WRED