D-Link xStack DES-3528 Series Cli Reference Manual page 114

xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch CLI Reference Guide
config scheduling
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To configure the traffic scheduling for each CoS queue:
DES-3528:admin#
Command: config scheduling ports 10 3 strict
Success.
DES-3528:admin#
config scheduling_mechanism
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
Used to configure the traffic scheduling mechanism for each CoS queue.
config scheduling {ports [<portlist> | all ]} <class_id 0-6> [strict | weight <value 1-
127>]
The Switch contains seven hardware priority queues available. Incoming packets must be
mapped to one of these seven queues. This command is used to specify the rotation
mechanism regarding how packets in these seven hardware priotiry queues are being
handled and emptied.
The Switch's default (if the config scheduling command is not used, or if the config
scheduling command is entered with weight parameters set to 0) is to empty the 7 hardware
priority queues in order − from the highest priority queue (hardware queue 6) to the lowest
priority queue (hardware queue 0). Each hardware queue will transmit all of the packets in its
buffer before allowing the next lower priority queue to transmit its packets. When the lowest
hardware priority queue has finished transmitting all of its packets, the highest hardware
priority queue can again transmit any packets it may have received.
The weight parameter allows the user to specify the maximum number of packets a given
hardware priority queue can transmit before allowing the next lower hardware priority queue
to begin transmitting its packets. A value between 0 and 127 can be specified. For example,
if a value of 3 is specified, then the highest hardware priority queue (number 6) will be
allowed to transmit 3 packets − then the next lower hardware priority queue (number 5) will
be allowed to transmit 3 packets, and so on, until all of the queues have transmitted 3
packets. The process will then repeat.
<class_id 0-6> − Specifies which of the seven hardware priority queues that the config
scheduling command will apply to. The seven hardware priority queues are identified by
number, from 0 to 6, with the queue 0 being the lowest priority.
[<portlist> | all] − Specifes a range of ports to be configured.
strict – Specifies this queue is always working in strict mode.
weight <value 1-127> − Using weighted fair algorithm to handle packets in priority queues.
Each queue will operate based on its setting of weight values.
Only Administrator and Operator and Power-User-level users can issue this command.
config scheduling ports 10 3 strict
Used to configure the traffic scheduling mechanism for a port or a range of ports.
config scheduling_mechanism {ports [<portlist> | all ]} [strict | wrr]
This command is used to specify how the Switch handles packets in priority queues.
<portlist> – Select a port or a list of ports to configure.
all – Choose this option to select all ports.
strict − The highest queue first process.That is,the highest queue should always be
processed first.
wrr − Using weighted roundrobin algorithm to handle packets in priority queues.
Only Administrator and Operator and Power-User-level users can issue this command.
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