D-Link DXS-3400 User Manual - Page 271

DXS-3400 Series Lite Layer 3 Stackable 10GbE Managed Switch Web UI Reference Guide QCN QCN CNPV Status This window is used to display and configure the Quantized Congestion Notification (QCN) Congestion Notification Priority Value (CNPV) status on the Switch. QCN is a form of end-to-end congestion management defined in IEEE 802.1.Qau. The purpose of QCN is to ensure that congestion is controlled from the sending device to the receiving device in a dynamic fashion that can deal with changing bottlenecks. When an IEEE 802.1p priority is assigned as a CNPV globally, the CNPV configuration for all interfaces will be created with a default value. When a priority is deleted from CNPV, the CNPV configuration for all interfaces will be deleted. To view the following window, click QoS> QCN > QCN CNPV Status, as shown below: Figure 7-32QCN CNPV Status Window The fields that can be configured are described below: Parameter QCN Status CNM Transmit Priority Description Select to globally enable or disable the QCN feature here. Select the IEEE 802.1p priority value for all Congestion Notification Messages (CNMs) here. The range is from 0 to 7. By default, this value is 6. Click the Apply button to accept the changes made. QCN CNPV Settings This window is used to display and configure the QCN feature's CNPV settings. To view the following window, click QoS> QCN >QCN CNPV Settings, as shown below: 261