Queue Management

For every traffic class, the Queue Management table allows you to:

Note: Disabling Strict Priority for a traffic class also disables Strict Priority for all traffic classes with a lower priority level. Enabling Strict Priority for a traffic class enables Strict Priority for all traffic classes with a higher priority level.

Strict Priority

With the Strict Priority setting, the device first transmits data packets that have a higher traffic class (higher priority) before transmitting a data packet with the next highest traffic class. The device transmits a data packet with the lowest traffic class (lowest priority) when there are no other data packets remaining in the queue. In unfortunate cases, the device never sends packets with a low priority if there is a high volume of high-priority traffic waiting to be sent on this port.

In applications that are time- or latency-critical, such as VoIP or video, Strict Priority enables high-priority data to be sent immediately(refer Maximum Bandwidth).

Weighted Fair Queuing

With Waited Fair Queuing, also called WeightedRoundRobin (WRR), the user assigns a minimum or reserved bandwidth to each traffic class. This ensures that data packets with a lower priority are also sent when the network is very busy.

If you assign Weighted Fair Queuing to every traffic class, the entire bandwidth for the corresponding port is available to you.

The weighting values range from 0% to 100% of the available bandwidth, in steps of 5%.

Maximum Bandwidth

By entering a maximum bandwidth you can limit the bandwidth for each traffic class to a maximum value, regardless of whether you selected "Weighted Fair Queuing" or "Strict Priority".

Buttons

Tab. Buttons (Forts.)

Button

Meaning

“Set”

Transfers the changes to the volatile memory (RAM) of the device. To permanently save the changes afterwards, you open the Basic Settings:Load/Save dialog and click “Save”.

“Reload”

Updates the fields with the values that are saved in the volatile memory (RAM) of the device.

“Help”

Opens the online help.