Queue weight – Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) User Manual
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Brocade 6910 Ethernet Access Switch Configuration Guide
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Priority Commands (Layer 2)
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A weight can be assigned to each of the weighted queues (and thereby to the corresponding
traffic priorities). This weight sets the frequency at which each queue is polled for service, and
subsequently affects the response time for software applications assigned a specific priority
value.
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Service time is shared at the egress ports by defining scheduling weights for WRR, or for the
queuing mode that uses a combination of strict and weighted queuing. Service time is
allocated to each queue by calculating a precise number of bytes per second that will be
serviced on each round.
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The specified queue mode applies to all interfaces.
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Protocols used to synchronize distributed switches use packets of 1588 bytes to control the
synchronization process. This switch therefore assigns packets of this size to the highest
priority queue to ensure quick passage.
Example
The following example sets the queue mode to strict priority service mode:
Console(config)#queue mode strict
Console(config)#
Related Commands
queue weight
This command assigns weights to the eight class of service (CoS) priority queues when using
weighted queuing, or one of the queuing modes that use a combination of strict and weighted
queuing. Use the no form to restore the default weights.
Syntax
queue weight weight0...weight7
no queue weight
weight0...weight7 - The ratio of weights for queues 0 - 7 determines the weights used by
the WRR scheduler. (Range: 1-255)
Default Setting
Weights 1, 2, 4, 6, 8, 10, 12, 14 are assigned to queues 0 - 7 respectively.
Command Mode
Global Configuration
Command Usage
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This command shares bandwidth at the egress port by defining scheduling weights for
Weighted Round-Robin, or for the queuing mode that uses a combination of strict and
weighted queuing (see
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Bandwidth is allocated to each queue by calculating a precise number of bytes per second that
will be serviced on each round.