SMC Networks TigerSwitch 100, Руководство по управлению

Страница: 296 / 334

C
OMMAND
L
INE
I
NTERFACE
3-152
• 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 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 port 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...weight4
no queue bandwidth
weight1...weight4 - The ratio of weights for queues 0 - 3 determines
the weights used by the WRR scheduler. (Range: 1 - 255)
Default Setting
Weights 16, 64, 128 and 240 are assigned to queue 0, 1, 2 and 3
respectively.
Console(config)#interface ethernet 1/3
Console(config-if)#switchport priority default 5