Creating A Wred Drop Profile - Huawei Quidway S7700 Configuration Manual - Qos

Quidway S7700 Smart Routing Switch
Configuration Guide - QoS
Context
The Canonical Format Indicator (CFI) field in a VLAN tag is also called the Drop Eligible
Indicator (DEI), and is used to mark the drop priority of packets in certain situations. When the
rate of packets exceeds the CIR, the S7700 sets the DEI field of the packets to 1. That is, these
packets have a high drop priority. If congestion occurs, subsequent devices first discard packets
with the DEI field being 1.
If you need to set the CFI field as the internal drop priority on multiple interfaces, you can
perform the configuration on the port group.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Or run the port-group port-group-name command to enter the port group view.
Step 3 Run:
dei enable
The CFI field is configured as the internal drop priority.
By default, the CFI field is not configured as the internal drop priority.
----End

3.2.4 Creating a WRED Drop Profile

This section describes how to create a WRED drop profile, and set the upper threshold, lower
threshold, and maximum drop percent of the WRED drop profile for packets of different colors.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
drop-profile drop-profile-name
A drop profile is created and the drop profile view is displayed.
Issue 01 (2011-07-15)
NOTE
l The interface type can be Ethernet, GE, XGE, or Eth-Trunk.
l You need to create a port group before performing this task. For details about creating a port group,
see Configuring the Interface Group in the Quidway S7700 Smart Routing Switch Configuration Guide
- Ethernet.
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3 Congestion Avoidance and Congestion Management
Configuration
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