Accton Technology 24/48-Port, ES4548D, ES4524D Class of Service Commands, Priority Commands Layer

Chapter 55: 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 eight 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.

Table 55-1 Priority Commands

Command Groups	Function	Page
Priority (Layer 2)	Configures default priority for untagged frames, sets queue weights,	55-1
	and maps class of service tags to hardware queues
Priority (Layer 3 and 4)	Maps TCP ports, IP precedence tags, or IP DSCP tags to class of	55-7
	service values

Priority Commands (Layer 2)

This section describes commands used to configure Layer 2 traffic priority on the switch.

Table 55-2 Priority Commands (Layer 2)

Command	Function	Mode	Page
queue mode	Sets the queue mode to strict priority or Weighted	GC	55-2
	Round-Robin (WRR)
switchport priority default	Sets a port priority for incoming untagged frames	IC	55-3
queue bandwidth	Assigns round-robin weights to the priority queues	IC	55-4
queue cos-map	Assigns class-of-service values to the priority queues	IC	55-4
show queue mode	Shows the current queue mode	PE	55-5
show queue bandwidth	Shows round-robin weights assigned to the priority queues	PE	55-6
show queue cos-map	Shows the class-of-service map	PE	55-6
show interfaces switchport	Displays the administrative and operational status of an	PE	45-10
	interface

55-1