SMC Networks 6128PL2, Management Manual

Page: 577 / 664

Priority Commands
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4
Default Setting
Weighted Round Robin
Command Mode
Global Configuration
Command Usage
You can set the switch to service the queues based on a strict rule that
requires all traffic in a higher priority queue to be processed before lower
priority queues are serviced, or use Weighted Round-Robin (WRR) queuing
that specifies a relative weight of each queue. WRR uses a predefined relative
weight for each queue that determines the percentage of service time the
switch services each queue before moving on to the next queue. This
prevents the head-of-line blocking that can occur with strict priority queuing.
Example
The following example sets the queue mode to strict priority service mode:
switchport priority default
This command sets a priority for incoming untagged frames. Use the no form to
restore the default value.
Syntax
switchport priority default default-priority-id
no switchport priority default
default-priority-id - The priority number for untagged ingress traffic.
The priority is a number from 0 to 7. Seven is the highest priority.
Default Setting
The priority is not set, and the default value for untagged frames received on
the interface is zero.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• The precedence for priority mapping is IP DSCP, and default switchport
priority.
• The default priority applies for an untagged frame received on a port set to
accept all frame types (i.e, receives both untagged and tagged frames). This
priority does not apply to IEEE 802.1Q VLAN tagged frames. If the incoming
frame is an IEEE 802.1Q VLAN tagged frame, the IEEE 802.1p User Priority
bits will be used.
Console(config)#queue mode strict
Console(config)#