Switchport priority default – PLANET SGSD-1022 User Manual
Page 624
User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
• wrr - Weighted Round-Robin shares bandwidth at the egress ports by using scheduling weights 1, 2, 4, 8 for queues
0 -3 respectively.
• hybrid -Services the highest priority queue (3) according to strict priority queuing, after which the 3 lower priority
queues (0, 1, 2) are processed according to their WRR weightings.
Default Setting
Weighted Round Robin
Command Mode
Global Configuration
Command Usage
• The switch can be set to service the port queues based on strict priority, WRR, or a combination of strict and
weighted queueing.
• Strict priority requires all traffic in a higher priority queue to be processed before lower priority queues are serviced.
• WRR uses a relative weight for each queue which determines the number of packets the switch transmits every time
it services a queue before moving on to the next queue. Thus, a queue weighted 8 will be allowed to transmit up to 8
packets, after which the next lower priority queue will be serviced according to it’s weighting. This prevents the
head-of-line blocking that can occur with strict priority queuing.
• When using hybrid priority queuing mode, the switch employ strict priority queuing for the highest priority queue
(queue 3) before processing queues 2 through 0 according to their WRR weights.
Example
The following example sets the queue mode to strict priority service mode:
Console(config)#queue mode strict
Console(config)#
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
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