SMC Networks 8926EM, Management Manual

Page: 615 / 792

Priority Commands (Layer 2)
35-3
35
switchport priority default
This command sets 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 eight priority queues for each port. It is configured to use
strict priority queuing or Weighted Round Robin using the queue mode
command (see page 35-2). 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 2 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 port 3 to 5:
Related Commands
show interfaces switchport (27-11)
Console(config)#interface ethernet 1/3
Console(config-if)#switchport priority default 5