3Com Switch 8800 Configuration Guide
Chapter 33 QoS Configuration
33-29
2) Use WRR algorithm for the queues 0 to 5. Set the queues 0, 1 and 2 into WRR
queue 1, with weight respectively as 20, 20 and 30; set the queues 3, 4 and 5 into
WRR queue 2, with weight respectively as 20, 20 and 40. Use SP algorithm for the
queues 6 and 7.
[SW8800-GigabitEthernet7/1/1] queue-scheduler wrr group1 0 20 1 20 2 30 group2
3 20 4 20 5 40
[SW8800] display qos-interface GigabitEthernet7/1/1 queue-scheduler
GigabitEthernet7/1/1 Port scheduling:
QID: scheduling-group weight
-----------------------------------
0 : wrr , group1 20
1 : wrr , group1 20
2 : wrr , group1 30
3 : wrr , group2 20
4 : wrr , group2 20
5 : wrr , group2 40
6 : sp 0
7 : sp 0
33.4.6 WRED Parameters Configuration Example
I. Network requirements
Set WRED parameters and drop algorithm for packets at the port GE7/1/1: Configure
parameters for WRED 0; outbound queue ID is 7;
green
-
min
-
threshold
is 150;
green
-
max
-
threshold
is 500;
green
-
max
-
prob
is 5;
yellow
-
min
-
threshold
is 100;
yellow
-
max
-
threshold
is 150;
yellow
-
max
-
prob
is 10;
red
-
min
-
threshold
is 50;
red
-
max
-
threshold
is 100;
red
-
max
-
prob
is 15;
exponent
is 10; the port is in WRED drop
mode; import the parameters of WRED 0.
II. Network diagram
GE7/1/8
GE7/1/1
GE7/1/2
VLAN2,
1.0.0.1/8
VLAN3,
2.0.0.1/8
PC1
PC2
GE7/1/8
GE7/1/1
GE7/1/2
VLAN2,
1.0.0.1/8
VLAN3,
2.0.0.1/8
PC1
PC2
Figure 33-11
Network diagram for WRED parameters configuration
