DGS-3312SR Layer 3 Gigabit Switch
97
config scheduling_mechanism
Purpose
Used to configure the scheduling mechanism for the QoS function
Syntax
config scheduling mechanism [strict | round_robin]
Description
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.
Parameters
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.
Restrictions Only
administrator-level users can issue this command.
Example usage:
To configure the traffic scheduling mechanism for each COS queue:
DGS-3312SR:4#config scheduling_mechanism strict
Command: config scheduling_mechanism strict
Success.
DGS-3312SR:4#
show scheduling_mechanism
Purpose
Used to display the current traffic scheduling mechanisms in use
on the switch.
Syntax
show scheduling_mechanism
Description
This command will display the current traffic scheduling
mechanisms in use on the switch.
Parameters None.
Restrictions None.
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