Allied Telesis AT-9724TS specifications QoS Scheduling Mechanism, Output Scheduling, Weight fair

Click Apply to set the bandwidth control for the selected ports. Results of configured Bandwidth Settings will be displayed in the Port Bandwidth Table.

QoS Scheduling Mechanism

This drop-down menu allows you to select between a Weight Fair and a Strict mechanism for emptying the classes of service. In the Configuration folder open the QoS folder and click QoS Scheduling Mechanism, to view the screen shown below.

Figure 6- 49. Scheduling Mechanism Configuration and QoS Scheduling Mechanism Table

The Scheduling Mechanism has the following parameters.

Parameter	Description
Strict	The highest queue is the first to process traffic.That is, the highest queue will finish before other queues empty.
Weight fair	Use the weighted round-robin (WRR) algorithm to handle packets in an even distribution in priority queues.

Click Apply to let your changes take effect.

Output Scheduling

QoS can be customized by changing the output scheduling used for the classes of service in the Switch. As with any changes to QoS implementation, careful consideration should be given to how network traffic in lower classes of service is affected. Changes in scheduling may result in unacceptable levels of packet loss or significant transmission delay. If you choose to customize this setting, it is important to monitor network performance, especially during peak demand, as bottlenecks can quickly develop if the QoS settings are not suitable. In the Configuration folder open the QoS folder and click QoS Output Scheduling, to view the screen shown below.

Figure 6- 50. QoS Output Scheduling Configuration window	68
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch