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4-252
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 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.
Priority Commands (Layer 2)
Table 4-62 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
4-252
Priority (Layer 3
and 4)
Maps TCP ports, IP precedence tags, or IP DSCP
tags to class of service values
4-259
Table 4-63 Priority Commands (Layer 2)
Command Function Mode Page
queue mode Sets the queue mode to strict priority or
Weighted Round-Robin (WRR)
GC 4-253
switchport priority
default
Sets a port priority for incoming untagged
frames
IC 4-254
queue bandwidth Assigns round-robin weights to the priority
queues
IC 4-255
queue cos-map Assigns class-of-service values to the priority
queues
IC 4-256
show queue mode Shows the current queue mode PE 4-257
show queue
bandwidth
Shows round-robin weights assigned to the
priority queues
PE 4-258