Accton Technology ES3528M-SFP manual Queue bandwidth

4 Command Line Interface

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 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 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.

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)

Default Setting

Weights 1, 2, 4, 8 are assigned to queues 0-3 respectively.

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