D-Link xStack DES-6500 Cli Manual page 124

xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch CLI Manual
config scheduling_mechanism
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To configure the traffic scheduling mechanism for each COS queue:
D E S - 6 5 0 0 : 4 # c o n f i g s c h e d u l i n g _ m e c h a n i s m s t r i c t
C o m m a n d : c o n f i g s c h e d u l i n g _ m e c h a n i s m s t r i c t
S u c c e s s .
D E S - 6 5 0 0 : 4 #
show scheduling_mechanism
Purpose
Syntax
Description
Parameters
Restrictions
Used to configure the scheduling mechanism for the QoS function
config scheduling_mechanism [strict | weight_fair]
The config scheduling_mechanism command allows the user to
select between a Weight Fair (WRR) and a Strict mechanism for
emptying the priority classes of service of the QoS function. The Switch
contains seven hardware priority classes of service. Incoming packets
must be mapped to one of these seven hardware priority classes of
service. This command is used to specify the rotation by which these
seven hardware priority classes of service are emptied.
The Switch's default is to empty the seven priority classes of service in
order  from the highest priority class of service (queue 6) to the lowest
priority class of service (queue 0). Each queue will transmit all of the
packets in its buffer before allowing the next lower priority class of
service to transmit its packets. Lower classes of service will be pre-
empted from emptying its queue if a packet is received on a higher
class of service. The packet that was received on the higher class of
service will transmit its packet before allowing the lower class to resume
clearing its queue.
strict – Entering the strict parameter indicates 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.
weight_fair – Entering the weight fair parameter indicates that the
priority classes of service will empty packets in a weighted round-robin
(WRR) 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
This command will display the current traffic scheduling mechanisms in
use on the Switch.
None.
None.
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