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incoming frame is an IEEE 802.1Q VLAN tagged frame, the IEEE
802.1p User Priority bits will be used.
• This switch provides four priority queues for each port. It is
configured to use Weighted Round Robin, which can viewed with the
queue bandwidth command. Inbound frames that do not have
VLAN tags are tagged with the input port’s default ingress user
priority, and then placed in the appropriate priority queue at the
output port. The default priority for all ingress ports is zero.
Therefore, any inbound frames that do not have priority tags will be
placed in queue 0 of the output port. (Note that if the output port is
an untagged member of the associated VLAN, these frames are
stripped of all VLAN tags prior to transmission.)
Example
The following example shows how to set a default priority on por ts 3 to 5:
queue bandwidth
Use this command to assign weighted round-robin (WRR) weights to
the four class of service (CoS) priority queues. Use the no form to
restore the default weights.
Syntax
queue bandwidth weight1...weight255
no queue bandwidth
•weight1...weight255 - The ratio of weights for queues 0 - 3
determines the weights used by the WRR scheduler. (Range: 1 -
255)
Default Setting
WRR is disabled. Strict priority is used for default scheduling.
Weights 1, 4, 16 and 64 are assigned to queue 0, 1, 2 and 3
respectively.
Command Mode
Global Configuration
Console(config)#interface ethernet 1/3
Console (config-if)#switchport priority default 5