l Configuring traffic policing based on complex traffic classification and the remarking
action
NOTE
Before configuring congestion avoidance, you need to perform either of the preceding tasks to color packets
as the basis of congestion avoidance.
Data Preparation
To configure congestion avoidance, you need the following data.
No. Data
1 Upper threshold, lower threshold, and maximum drop percent of WRED
3.2.2 (Optional) Setting the Length of the Interface Queue
This section describes how to set the length of the interface queue and the length of the specified
priority queue.
Context
The length of the interface priority queue is automatically managed by the system. You can set
the length of the interface priority queue as required by using the qos queue command.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
qos queue queue-index length length-value
The length of the interface priority queue is set.
NOTE
The queue length cannot be set on G48SBC boards and W series boards.
----End
3.2.3 (Optional) Configuring the CFI Field as the Internal Drop
Priority
After the CFI field is configured as the internal drop priority, if the rate of packets exceeds the
CIR, the S7700 sets the value of the CFI field in packets to 1. When congestion occurs, the
S7700 first discards the packets with the CFI field being 1.
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.
80
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