24-Port Layer 3 Switch Management Guide

C OMMAND L INE I NTERFACE
4-182
switchport priority default
Use this command to set a priority for incoming untagged frames. Use the
no form to restore the default value.
Syntax
switchport priority default default-priority-id
no switchport priority default
default-priority-id - The priority number for untagged ingress traffic.
The priority is a number from 0 to 7. Seven is the highest priority.
Default Setting
The priority is not set, and the default value for untagged frames
received on the interface is zero.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• The precedence for priority mapping is IP Port, IP Precedence or IP
DSCP, and default switchport priority.
• The default priority applies for an untagged frame received on a port
set to accept all frame types (i.e, receives both untagged and tagged
frames). This priority does not apply to IEEE 802.1Q VLAN tagged
frames. If the 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 be viewed with the show
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.)