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4-222
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)
Table 4-57 Priority Commands
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
4-222
Priority (Layer 3 and 4) Maps TCP ports, IP precedence tags, or IP DSCP
tags to class of service values
4-229
Table 4-58 Priority Commands (Layer 2)
Command Function Mode Page
queue mode Sets the queue mode to strict priority or
Weighted Round-Robin (WRR)
GC 4-223
switchport priority
default
Sets a port priority for incoming untagged
frames
IC 4-224
queue bandwidth Assigns round-robin weights to the priority
queues
GC 4-225
queue cos map Assigns class-of-service values to the
priority queues
IC 4-226
show queue mode Shows the current queue mode PE 4-227
show queue
bandwidth
Shows round-robin weights assigned to the
priority queues
PE 4-227