4-250
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 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.)
Example
The following example shows how to set a default priority on port 3 to 5:
queue bandwidth
This command assigns weighted round-robin (WRR) weights to the four
class of service (CoS) priority queues. Use the no form to restore the
default weights.
Note: This switch does not allow the queue service weights to be set. The
weights are fixed as
1, 2, 4, 8, for queues 0 through 3 respectively.
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: 1-31)
Console(config)#interface ethernet 1/3
Console(config-if)#switchport priority default 5
To Next Page
Loading...
Need help?
General
