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Priority commands, Priority commands (layer 2), Switchport priority default – Accton Technology VS4512DC User Manual

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Priority Commands

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Priority Commands

The commands described in this section allow you to specify which data packets
have greater precedence when traffic is buffered in the switch due to congestion.
This switch supports CoS with four priority queues for each port. Data packets in a
port’s high-priority queue will be transmitted before those in the lower-priority
queues. You can set the default priority for each interface, the relative weight of each
queue, and the mapping of frame priority tags to the switch’s priority queues.

Priority Commands (Layer 2)

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 Groups

Function

Page

Priority (Layer 2)

Configures default priority for untagged frames, sets queue weights,

and maps class of service tags to hardware queues

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Priority (Layer 3 and 4)

Maps TCP ports, IP precedence tags, or IP DSCP tags to class of

service values

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Command

Function

Mod

e

Page

switchport priority default Sets a port priority for incoming untagged frames

IC

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queue mode

Sets the queue mode to strict priority or Weighted

Round-Robin (WRR)

GC

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queue bandwidth

Assigns round-robin weights to the priority queues

GC

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queue cos map

Assigns class-of-service values to the priority queues

IC

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show queue mode

Shows the current queue mode

PE

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show queue bandwidth

Shows round-robin weights assigned to the priority queues

PE

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show queue cos-map

Shows the class-of-service map

PE

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show interfaces

switchport

Displays the administrative and operational status of an

interface

PE

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