D-Link DGS-1100-06/ME, Cli Reference Manual

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DGS-1100-06/ME Metro Ethernet Managed Switch CLI Reference Guide
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DGS-1100-06/ME:5#
config scheduling_mechanism
Purpose To configure the scheduling mechanism for the QoS function.
Syntax
config scheduling_mechanism [strict | wrr]
Description
The config 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
Switch contains four hardware priority classes of service. Incoming
packets must be mapped to one of these four hardware priority
classes of service, or queues. This command is used to specify the
rotation by which these four hardware priority queues are emptied.
The Switch’s default is to empty the four hardware priority queues in
order − from the highest priority hardware queue (class 3) to the
lowest priority hardware queue (class 0). Each queue will transmit all
of the packets in its buffer before allowing the next lower priority
queue to transmit its packets. A lower priority hardware queue will
be pre-empted from emptying its queue if a packet is received on a
higher priority hardware queue. The packet received on the higher
priority hardware queue transmits its packet before allowing the
lower priority hardware queue to resume clearing its queue.
Parameters strict
– Specifies that the highest class of service is the first to be
processed. That is, the highest class of service should finish
emptying before the others begin.
wrr
– Specifies that the priority classes of service are to empty
packets in a weighted roundrobin (WRR) order.
Restrictions Only administrator or operator level users can issue this command.
Example usage:
To configure the traffic scheduling mechanism for each COS queue:
DGS-1100-06/ME:5#config scheduling_mechanism strict
Command: config scheduling_mechanism strict
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DGS-1100-06/ME:5#
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.