SMC Networks SMC6224M manual 223, Queue bandwidth

PRIORITY COMMANDS

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:

Console(config)#interface ethernet 1/3

Console(config-if)#switchport priority default 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.

Syntax

queue bandwidth weight1...weight3 no queue bandwidth

weight1...weight3 - The ratio of weights for queues 0-3 determines the weights used by the WRR scheduler. However, note that Queue 0 is fixed at a weight of 1, and cannot be configured. (Range: 1-31)

Default Setting

Weights 1, 2, 4, 6 are assigned to queues 0-3 respectively.

Queue 0 is non-configurable.

Command Mode

Global Configuration

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