Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 3 WRED Configuration Commands
3Com Corporation
3-4
Use the undo qos wred ip-precedence command to restore the default value.
WRED parameters can be set only after the command qos wred has been used to
apply WRED at the interface. The thresholds are for the average quantity of packets in
queue.
Related command: qos wred, display qos wred interface.
Example
# Display how to set minimum threshold of the packet of precedence 3 at an interface to
20, maximum threshold to 40 and discard probability to 15.
[3Com -Ethernet0/0/0] qos wred ip-precedence 3 low-limit 20 high-limit 40
discard-probability 15
3.1.5 qos wred weighting-constant
Syntax
qos wred weighting-constant exponent
undo qos wred weighting-constant
View
Interface view
Parameter
exponent: Exponential used to calculate the average queue length, in the range 1 to 16.
It defaults to 9.
Description
Use the qos wred weighting-constant command to set exponential used to calculate
the average length of WRED queues.
Use the undo qos wred weighting-constant command to restore the default value.
Before you can configure WRED parameters on an interface, you must apply WRED
with the qos wred command on it.
Related command: qos wred, display qos wred interface.
Example
# Set the exponential used to calculate average queue length to 6 at Ethernet0/0/0
interface, provided that WRED has already been applied on this interface.
[3Com -Ethernet0/0/0] qos wred weighting-constant 6