D-Link DGS-3212SR Command Line Interface Reference Manual page 124

config scheduling_mechanism
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To configure the traffic scheduling mechanism for each COS queue:
DGS-3212SR:4#config scheduling_mechanism strict
Command: config scheduling_mechanism strict
Success.
DGS-3212SR:4#
show scheduling_mechanism
Purpose
Syntax
DGS-3212SR Layer 3 Gigabit Switch
Used to configure the scheduling mechanism for the QoS function
config scheduling mechanism [strict | round_robin]
The config scheduling_mechanism command allows the user to
select between a round_robin and a strict mechanism for emptying
the priority queues of the QoS function. The switch contains 9
hardware priority queues, one of which is internal and
unoperational. Incoming packets must be mapped to one of these
eight hardware priority queues. This command is used to specify
the rotation by which these eight hardware priority queues are
emptied.
The switch's default is to empty the eight priority queues in order −
from the highest priority queue (queue 7) to the lowest priority
queue (queue 0). Each queue will transmit all of the packets in its
buffer before allowing the next lower priority queue to transmit its
packets. When the lowest priority queue has finished transmitting
all of its packets, the highest hardware priority queue can again
transmit any packets it may have received.
strict – Entering the strict parameter indicates that the highest
queue is the first to be processed. That is, the highest queue
should finish emptying before the others begin.
round_robin– Entering the round_robin parameter indicates that
the priority queues will empty packets in a round-robin order. That
is to say that they will be emptied in an even distribution.
Only administrator-level users can issue this command.
Used to display the current traffic scheduling mechanisms in use
on the switch.
show scheduling_mechanism
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