D-Link DGS-3612G Product Manual - Page 318

xStack® DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch Click Apply to set the per queue bandwidth control for the selected ports. Results of configured per queue bandwidth settings will be displayed in the Queue Bandwidth Table. HOL Prevention Settings This window is used to enable or disable Head of Line (HOL) prevention. To view the HOL Prevention Settings window, click QoS > HOL Prevention Settings, as shown below: Figure 5- 6. HOL Prevention Settings window Toggle to enable or disable head of line prevention. The default is Enabled. Schedule Settings The Schedule Settings section includes QoS Output Scheduling Settings and QoS Scheduling Mechanism Settings. QoS Output Scheduling Settings QoS can be customized by changing the output scheduling used for the hardware classes of service in the Switch. As with any changes to QoS implementation, careful consideration should be given to how network traffic in lower priority classes of service is affected. Changes in scheduling may result in unacceptable levels of packet loss or significant transmission delay. If choosing 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. To view this table, click QoS > Schedule Settings > QoS Output Scheduling Settings, as shown below: 302