There is a default WRED drop profile. You cannot delete the default WRED drop profile, but
can modify the values of the parameters.
Step 3 Run:
color { green | non-tcp | red | yellow } low-limit low-limit-percentage high-limit
high-limit-percentage discard-percentage discard-percentage
WRED parameters are set.
By default, the upper threshold, lower threshold, and maximum drop percent of a WRED drop
profile are 100.
NOTE
The WRED algorithm for non-TCP packets cannot be used on S series boards, W series boards, and
G48SBC boards.
For more information about S series boards, see Board Classification in the Quidway S7700 Smart Routing
Switch Hardware Description.
----End
3.2.5 Applying the WRED Drop Profile
The configured WRED drop profile takes effect only after being applied. You can apply the
WRED drop profile to an interface or a queue.
Context
You can apply a WRED drop profile on an interface or in an interface queue or on an interface
and an interface queue on the S7700 as required.
l If a WRED drop profile is applied to the system and an interface simultaneously, the WRED
drop profile applied to the interface takes effect. After a WRED drop profile is applied to
the system, it takes effect on all the interfaces.
l If WRED drop profiles are applied to an interface and an interface queue on the S7700, the
S7700 matches packets with WRED drop profiles in the interface queue and the interface
in sequence. Then the S7700 performs congestion avoidance for the matched packets.
To set the same WRED drop profile on multiple interfaces, perform the configuration on the
port group to reduce the workload.
Before applying a WRED drop profile, run the drop-profile command to create a WRED drop
profile.
Procedure
l Applying a WRED drop profile to an interface
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number
The interface view is displayed.
3. Run:
qos wred drop-profile-name
Quidway S7700 Smart Routing Switch
Configuration Guide - QoS
3 Congestion Avoidance and Congestion Management
Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
82
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