3Com 4200G 12-Port Configuration Manual page 378

To do...
Configure SP queuing
2) Configuring SDWRR queuing
Follow these steps to configure SDWRR queuing:
To do...
Enter system view
Configure SDWRR
queuing
The port of a Switch 4200G provides up to eight output queues. You can configure SP queuing,
SDWRR queuing, or SP queuing in combination with SDWRR queuing on a port as required.
With SDWRR queuing adopted, the output queues of a port can be assigned to group 1 and group
2. The two groups are scheduled using the SP algorithm. For example, you can assign queues 0
through 3 to group 1, and queues 4 through 7 to group 2. The queues in group 2 are scheduled
preferentially using WRR. The queues in group 1 are scheduled using WRR only when all the
queues in group 2 are empty.
With both SP queuing and SDWRR queuing adopted, groups are scheduled using the SP
algorithm. Assume that queue 0 and queue 1 are scheduled using SP queuing; queues 2 through 4
are assigned to group 1; queues 5 through 7 are assigned to group 2. The queues in group 2 are
scheduled preferentially using WRR. When all the queues in group 2 are empty, the queues in
group 1 are scheduled using WRR. Then, queue 1 is scheduled, and then queue 0.
When using SDWRR or SP+SDWRR for queue scheduling, you are recommended to assign queues
with successive queue numbers to the same scheduling group.
Configuration example
# Configure a Switch 4200G to use SP+SDWRR for queue scheduling, assigning queue 3, queue 4,
and queue 5 to WRR scheduling group 1, with the weigh of 20, 20 and 30; assigning queue 0, queue 1,
and queue 2 to WRR group 2, with the weight of 20, 20, and 40; using SP for scheduling queue 6 and
queue 7. Display queue scheduling configuration information after the configuration.
<Sysname> system-view
[Sysname] queue-scheduler wrr group1 3 20 4 20 5 30 group2 0 20 1 20 2 40
[Sysname] display queue-scheduler
Use the command...
undo queue-scheduler [ queue-id ] &<1-8>
Use the command...
system-view
queue-scheduler wrr { group1 { queue-id
queue-weight } &<1-8> | group2 { queue-id
queue-weight } &<1-8> }*
1-21
Remarks
Optional
By default, SP queuing
is used on all the output
queues of a port.
Remarks
—
Required
By default, SP
queuing is used on all
the output queues of
a port.