83
nfig scheduling_mechanism
command configures the
scheduling mechanism for the QoS function. It allows the user to
select between a round robin (WRR) and a strict mechanism for
emptying the priority classes of service of the QoS function. The
ardware priority classes of service. Incoming
ped to one of these four hardware priority
classes of service, or queues. This command is used to specify the
y which these four hardware priority queues are emptied.
The Switch’s default is to empty the four hardware priority queues in
from the highest priority hardware queue (class 3) to the
ority hardware queue (class 0). Each queue will transmit all
ckets in its buffer before allowing the next lower priority
ue to transmit its packets. A lower priority hardware queue will
pre-empted from emptying its queue if a packet is received on a
her priority hardware queue. The packet that was received on the
her priority hardware queue will transmit its packet before
wing the lower priority hardware queue to resume clearing its
ue.
Description The
co
Switch contains four h
packets must be map
rotation b
order
−
lowest pri
of the pa
que
be
hig
hig
allo
que
Parameters
ass_id 0-3> –
This specifies to which of the four hardware
sses of service the
config scheduling_mechanism
command
lies. The four hardware classes of service are identified by
ber (from 0 to 3), with the 0 queue having the lowest priority.
ct
– Specifies that the highest class of service is the first to be
cessed. That is, the highest class of service should finish
ptying before the others begin.
nd_robin
– Specifies that the priority classes of service are to
pty packets in a weighted roundrobin (WRR) order, or in an even
tribution.
<cl
cla
app
num
stri
pro
em
rou
em
dis
Restrictions Only
administrator-level users can issue this command.
Example usage:
To configure the tr
Success.
DGS3100#
affic scheduling mechanism for each COS queue:
DGS3100# config scheduling_mechanism strict
show scheduling_mechanism
Purpose
To display the current traffic scheduling mechanisms in use on the
Switch.
Syntax
show scheduling_mechanism
Description The
show scheduling_mechanism
command displays the current
traffic scheduling mechanisms in use on the Switch.
Parameters None.
Restrictions None.
Example usage:
To show the scheduling mechanism:
DGS3100# show scheduling_mechanism
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