C
OMMAND

L

INE

I

NTERFACE

3-160

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 Mode Page
Layer 2 Priority Commands
switchport priority
default
Sets a port priority for incoming
untagged frames
IC 3-161
queue bandwidth Assigns round-robin weights to the
priority queues
GC 3-162
queue cos map Assigns class of service values to the
priority queues
IC 3-163
show queue
bandwidth
Shows round-robin weights assigned
to the priority queues
PE 3-165
show queue
cos-map
Shows the class of service map PE 3-166
show interfaces
switchport
Displays the administrative and
operational status of an interface
PE 3-106
Layer 3 and 4 Priority Commands
map ip precedence Enables IP precedence class of service
mapping
GC 3-166
map ip precedence Maps IP precedence value to a class of
service
IC 3-167
map ip dscp Enables IP DSCP class of service
mapping
GC 3-169
map ip dscp Maps IP DSCP value to a class of
service
IC 3-170
b_mgmt.book Page 160 Tuesday, July 8, 2003 5:24 PM