Configuration Examples; Example For Configuring Congestion Avoidance And Congestion Management - Huawei Quidway S7700 Configuration Manual - Qos

Quidway S7700 Smart Routing Switch
Configuration Guide - QoS
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3.5 Configuration Examples

This section provides several configuration examples of congestion avoidance and congestion
management.
3.5.1 Example for Configuring Congestion Avoidance and
Congestion Management
After congestion avoidance and congestion management are configured, the S7700 provides
different services for packets of different priorities and ensures high-priority and low-delay
services.
Networking Requirements
The Switch is connected to the router through GE 2/0/1; the 802.1p priorities of voice, video,
and data services on the Internet are 6, 5, and 2 respectively, and these services can reach users
through the router and Switch, as shown in
2/0/1 on the Switch is greater than the rates of outgoing interfaces GE 1/0/1 and GE 1/0/2;
therefore, congestion may occur on these two outgoing interfaces. To reduce the effect caused
by congestion and ensure that high-priority and short-delay services are processed first, the
requirements are as follows.
Table 3-1 Congestion avoidance parameters
Types of
Services
Voice
Video
Data
Table 3-2 Congestion management parameters
Type of Services
Voice
Video
Data
Issue 01 (2011-07-15)
NOTE
The reset qos queue statistics command cannot be used on S-series and W-series boards.
For details about S-series and W-series boards, see Board Classification in the Quidway S7700 Smart
Routing Switch Hardware Description.
Color
Green
Yellow
Red
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3 Congestion Avoidance and Congestion Management
Figure 3-1. The rate of incoming interface GE
Lower Upper
Threshold (%) Threshold (%)
80 100
60 80
40 60
CoS
EF
AF3
AF1
Configuration
Drop Percent
10
20
40
89