Configuring Congestion Avoidance - Huawei Quidway S3900 Series Operation Manual

Operation Manual - QoS&QoS Profile
Quidway S3900 Series Ethernet Switches-Release 1510
Disable the applied queue scheduling mode. By default, all outbound queues on
the port adopts the WRR queue scheduling algorithm and their default weight
values are 1:2:3:4:5:9:13:15;
Query the configuration information.
Configuration procedure:
<Quidway> system-view
System View: return to User View with Ctrl+Z.
[Quidway] queue-scheduler wrr 2 2 3 3 4 4 5 5
[Quidway]display queue-scheduler
Queue scheduling mode: weighted round robin
weight of queue 0: 2
weight of queue 1: 2
weight of queue 2: 3
weight of queue 3: 3
weight of queue 4: 4
weight of queue 5: 4
weight of queue 6: 5
weight of queue 7: 5
[Quidway] undo queue-scheduler
[Quidway] display queue-scheduler
weight of queue 0: 1
weight of queue 1: 2
weight of queue 2: 3
weight of queue 3: 4
weight of queue 4: 5
weight of queue 5: 9
weight of queue 6: 13
weight of queue 7: 15

1.11 Configuring Congestion Avoidance

When congestion happens, the switch will drop packets as soon as possible to release
queue resources and try not to put packets into high-delay queues in order to eliminate
congestion. The switch adopts the WRED algorithm for congestion avoidance.
1.11.1 Configuration Prerequisites
The indexes of queues to be dropped at random, the queue length that starts the
drop action and the drop probability are specified
The ports that need this configuration are specified
Huawei Technologies Proprietary
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Chapter 1 QoS Configuration