H3C Technologies H3C S6300 Series Switches - Manual (Page 65)

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• For the interface to preferentially forward higher-priority traffic, configure a lower drop probability
for a queue with a greater queue number. Set different drop parameters for queue 0, queue 3, and
queue 7.
• Drop packets according to their colors:
{
In queue 0, set the drop probability to 25%, 50%, and 75% for green, yellow, and red packets,
respectively.
{
In queue 3, set the drop probability to 5%, 10%, and 25% for green, yellow, and red packets,
respectively.
{
In queue 7, set the drop probability to 1%, 5%, and 10% for green, yellow, and red packets,
respectively.
• Enable ECN for queue 7.
Configuration procedure
# Configure a queue-based WRED table, and set different drop parameters for packets with different
drop levels in different queues.
<Sysname> system-view
[Sysname] qos wred queue table queue-table1
[Sysname-wred-table-queue-table1] queue 0 drop-level 0 low-limit 128 high-limit 512
discard-probability 25
[Sysname-wred-table-queue-table1] queue 0 drop-level 1 low-limit 128 high-limit 512
discard-probability 50
[Sysname-wred-table-queue-table1] queue 0 drop-level 2 low-limit 128 high-limit 512
discard-probability 75
[Sysname-wred-table-queue-table1] queue 3 drop-level 0 low-limit 256 high-limit 640
discard-probability 5
[Sysname-wred-table-queue-table1] queue 3 drop-level 1 low-limit 256 high-limit 640
discard-probability 10
[Sysname-wred-table-queue-table1] queue 3 drop-level 2 low-limit 256 high-limit 640
discard-probability 25
[Sysname-wred-table-queue-table1] queue 7 drop-level 0 low-limit 512 high-limit 1024
discard-probability 1
[Sysname-wred-table-queue-table1] queue 7 drop-level 1 low-limit 512 high-limit 1024
discard-probability 5
[Sysname-wred-table-queue-table1] queue 7 drop-level 2 low-limit 512 high-limit 1024
discard-probability 10
[Sysname-wred-table-queue-table1] queue 7 ecn
[Sysname-wred-table-queue-table1] quit
# Apply the queue-based WRED table to interface Ten-GigabitEthernet 1/0/2.
[Sysname] interface Ten-GigabitEthernet 1/0/2
[Sysname-Ten-GigabitEthernet1/0/2] qos wred apply queue-table1
Displaying and maintaining WRED
Execute display commands in any view.
Task Command
Display WRED configuration and statistics for a
specified interface or all interfaces. display qos wred interface [ interface-type
interface-number ]