Class Of Service Commands; Priority Commands (Layer 2); Queue Mode - Samsung iES4028F Management Manual

4
Command Line Interface

Class of Service 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.
Command Groups
Priority (Layer 2)
Priority (Layer 3 and 4)

Priority Commands (Layer 2)

Command

queue mode

switchport priority default
queue cos map
show queue mode
show queue bandwidth
show queue cos-map
show interfaces switchport Displays the administrative and operational status of an
queue mode
This command sets the queue mode to strict priority or Weighted Round-Robin
(WRR) for the class of service (CoS) priority queues. Use the no form to restore the
default value.
Syntax
queue mode {strict | wrr}
no queue mode
• strict - Services the egress queues in sequential order, transmitting all
traffic in the higher priority queues before servicing lower priority queues.
• wrr - Weighted Round-Robin shares bandwidth at the egress ports by using
scheduling weights 1, 2, 4, 8 for queues 0 - 3 respectively.
Default Setting
Weighted Round Robin
4-308
Table 4-80 Priority Commands
Function
Configures default priority for untagged frames, sets queue weights,
and maps class of service tags to hardware queues
Maps IP DSCP tags to class of service values
Table 4-81 Priority Commands (Layer 2)
Function
Sets the queue mode to strict priority or Weighted
Round-Robin (WRR)
Sets a port priority for incoming untagged frames
Assigns class-of-service values to the priority queues
Shows the current queue mode
Shows round-robin weights assigned to the priority queues
Shows the class-of-service map
interface
Page
4-308
4-313
Mode Page
GC 4-308
IC 4-309
IC 4-310
PE 4-311
PE 4-311
PE 4-312
PE 4-199