Example: Configuring Color-Blind Red; Figure 3: Color-Blind Red Drop Profile With Colorless Queue Profile - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

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Example: Configuring Color-Blind RED

Copyright © 2010, Juniper Networks, Inc.
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
Configuring RED on page 27
Dropping Behavior Overview on page 25
RED and WRED Overview on page 26
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 29.

Figure 3: Color-Blind RED Drop Profile with Colorless Queue Profile

In the following example, the drop profile and queue profile combine to specify the
following:
When the average queue length is between 30 percent full (30 KB) and 90 percent
full (90 KB), up to 5 percent of the packets are randomly dropped regardless of their
color.
When the average queue length is greater than 90 percent, all packets are dropped
regardless of color.
host1(config)#drop-profile nocolor
host1(config-drop-profile)#c ommitted-threshold percent 30 90 5
host1(config-drop-profile)#exit
host1(config)#queue-profile colorless
host1(config-queue)#committed-length 100000 100000
host1(config-queue)#conformed-fraction 100
host1(config-queue)#exceeded-fraction 100
To achieve the same drop treatment for each color, you can specify color-blind RED in
combination with a color-sensitive queue profile, as shown in Figure 4 on page 30.
Chapter 4: Configuring Dropping Behavior with RED and WRED
29