3Com 5500-EI PWR Reference Manual page 790

Use the undo queue-scheduler command to restore the default.
By default, the WRR algorithm is used for all the output queues of a port. The default
weights of queues 0 through 7 are 1, 2, 3, 4, 5, 9, 13, and 15, as shown in
Table 1-9 The default weights for queues
Queue ID
0
1
2
3
4
5
6
7
A port of a Switch 5500-EI supports eight output queues, to which these queue scheduling
algorithms are applicable: SP, WRR, and WFQ. With WRR (or WFQ) adopted, if you set the
weight or the bandwidth of one or multiple queues to 0, the device will add the queue or
these queues to the SP group, where SP is adopted. For other queues, WRR (or WFQ) still
applies. In this case, both SP and WRR (or WFQ) are adopted.
Note that:
The queue scheduling algorithm specified by executing 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 will prompt configuration errors. For example, if you configure queues 0
and 2 to adopt SP and queues 3 through 7 to adopt WRR in system view, you can
modify the weights of queues 3 through 7 in port view but cannot modify the queue
scheduling algorithm of any queue in port view.
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 while the weights on the other ports
remain as set in system view.
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 weights (or
bandwidth values) specified in Ethernet port view. To do that, use the display this
command in the corresponding port view or the display current-configuration
interface command in any view. Note that the two commands display the queue
1
2
3
4
5
9
13
15
1-22
Table 1-9.
Weight