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19 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. The default priority can be set for each interface, also the queue service
mode and the mapping of frame priority tags to the switch's priority queues can be
configured.
Priority Commands (Layer 2)
This section describes commands used to configure Layer 2 traffic priority on the
switch.
Table 98: Priority Commands
Command Group Function
Priority Commands
(Layer 2)
Configures the queue mode, queue weights, and default priority for
untagged frames
Priority Commands
(Layer 3 and 4)
Sets the default priority processing method (CoS or DSCP), maps
priority tags for internal processing, maps values from internal priority
table to CoS values used in tagged egress packets for Layer 2 interfaces,
maps internal per hop behavior to hardware queues
Table 99: Priority Commands (Layer 2)
Command Function Mode
queue mode Sets the queue mode to Weighted Round-Robin (WRR),
strict priority, or a combination of strict and weighted
queuing
IC
queue weight Assigns round-robin weights to the priority queues IC
switchport priority default Sets a port priority for incoming untagged frames IC
show interfaces switchport Displays the administrative and operational status of an
interface
PE
show queue mode Shows the current queue mode PE
show queue weight Shows weights assigned to the weighted queues PE
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