Configuring Wred - 3Com 4500 Configuration Manual

The queue scheduling algorithm specified by using the queue-scheduler command in system
view takes effect on all the ports. The queue scheduling algorithm configured in port view must be
the same as that configured in system view. Otherwise, the system prompts configuration errors.
If the weight (or bandwidth value) specified in system view for a queue of WRR queuing or WFQ
queuing cannot meet the requirement of a port, you can modify the weight (or bandwidth value) for
this port in the corresponding Ethernet port view. The new weight (or bandwidth value) takes effect
only on the port.
If the weight (or bandwidth value) specified in system view for a queue of SP-WRR queuing or
SP-WFQ queuing in the command cannot meet the requirement of a port, you can modify the
weight (or bandwidth value) for this port in the corresponding Ethernet port view. The new weight
(or bandwidth value) takes effect only on the port.
The display queue-scheduler command cannot display the queue weight (or bandwidth value)
specified in Ethernet port view.
Configuration example
Adopts WRR for queue scheduling, setting the weights of the output queues to 2, 2, 3, 3, 4, 4, 5,
and 5 (in the order queue 0 through queue 7).
Verify the configuration.
Configuration procedure:
<Sysname> system-view
[Sysname] queue-scheduler wrr 2 2 3 3 4 4 5 5
[Sysname] 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

Configuring WRED

Refer to section
Configuration prerequisites
The indexes of queues to be dropped at random, the queue length that starts the drop action, and
the drop probability have been determined.
The ports that need this configuration have been determined.
Configuration procedure
Follow these steps to configure WRED:
Congestion Avoidance for information about WRED.
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