SMC Networks SMC6724L3 manual Priority Commands Layer

PRIORITY COMMANDS

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.

Command	Function	Page
Groups
Priority	Configures default priority for untagged frames, sets	4-181
(Layer 2)	queue weights, and maps class of service tags to
	hardware queues
Priority	Maps TCP ports, IP precedence tags, or IP DSCP	4-187
(Layer 3 and 4)	tags to class of service values

Priority Commands (Layer 2)

Command	Function	Mode	Page
switchport priority	Sets a port priority for incoming untagged	IC	4-182
default	frames
queue bandwidth	Assigns round-robin weights to the priority	GC	4-183
	queues
queue cos map	Assigns class-of-service values to the	IC	4-184
	priority queues
show queue	Shows round-robin weights assigned to the	PE	4-185
bandwidth	priority queues
show queue	Shows the class-of-service map	PE	4-186
cos-map
show interfaces	Displays the administrative and operational	PE	4-131
switchport	status of an interface

4-181