D-Link DES-3226L Reference Manual page 125

DES-3226L Layer 2 Fast Ethernet Switch User's Guide
NOTICE: The default QoS scheduling
arrangement is a strict priority schedule. To
customize scheduling to set up round-robin
queue clearing, the MAX. Latency and MAX.
Packets values need to be changed using the
config scheduling command. See config
scheduling below.
To use implement round-robin (weighted) priority, the switch's
four priority queues can be configured to reduce the buffer in a
round-robin fashion - beginning with the highest priority queue,
and proceeding to the lowest priority queue before returning to
the highest priority queue.
The weighted-priority based scheduling alleviates the main
disadvantage of strict priority-based scheduling − in that lower
priority queues get starved of bandwidth − by providing a
minimum bandwidth to all queues for transmission.
accomplished by configuring the maximum number of packets
allowed to be transmitted from a given priority queue and the
maximum amount of time a given priority queue will have to
wait before being allowed to transmit its accumulated packets.
This establishes a Class of Service (CoS) for each of the switch's
two hardware priority queues.
The possible range for maximum packets is: 0 to 255 packets.
The possible range for maximum latency is: 0 to 255 (in
increments of 16 microseconds each).
Command
config 802.1p
user_priority
show 802.1p
user_priority
Parameters
<priority 0-7> <class_id 0-1>
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