IBM BladeCenter Installation And User Manual page 69

When Output Priority Queue Method is enabled, the weight and latency specified in
the Class of Service Configuration window will take effect. Note that the weight can
only be a value between 1 and 15. A higher priority queue always has a larger
weight than a lower priority queue.
To enable priority queuing on the switch module, select Weighted Round Robin on
the drop-down menu on the preceding window and click APPLY.
The switch module supports 802.1p priority queuing; four priority queues are
supported per port. The switch module provides user-programmable mapping (four
Priority Queue assignments: High, Med-High, Med-Low, Low) for the eight 802.1p
priority classes (0 to 7). For the priority queue feature to take effect, users must first
enable the Output Priority Queue Method on the Class of Service window.
Otherwise, only the round-robin method can be used to schedule the packets in
four different priority queues.
When Output Priority Queue Method is enabled, the weight and latency specified in
the Class of Service Configuration preceding window will take effect. Note that the
weight can only be a value between 1 and 15. A higher priority queue always has a
larger weight than a lower priority queue.
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Chapter 5. Web-Based network management