D-Link DXS-3400 User Manual - Page 25

DXS-3400 Series Lite Layer 3 Stackable 10GbE Managed Switch Web UI Reference Guide Figure 3-10Loopback Test Window The fields that can be configured are described below: Parameter Unit From Port ~ To Port Loopback Mode Description Select the Switch unit that will be used for this configuration here. Select the appropriate port range used for the configuration here. Select the loopback mode here. Options to choose from are: • None - Specifies not to enable the loopback mode. • Internal MAC - Specifies the internal loopback mode at the MAC layer. • Internal PHY Default - Specifies the internal loopback mode at the PHY layer to test the default medium. • Internal PHY Copper - Specifies the internal loopback mode at the PHY layer to test the copper medium. • Internal PHY Fiber - Specifies the internal loopback mode at the PHY layer to test the fiber medium. • External MAC - Specifies the external loopback mode at the MAC layer. • External PHY Default - Specifies the external loopback mode at the PHY layer to test the default medium. • External PHY Copper - Specifies the external loopback mode at the PHY layer to test the copper medium. • External PHY Fiber - Specifies the external loopback mode at the PHY layer to test the fiber medium. 15