D-Link DXS-3610 User Manual - Page 26

DXS-3610 Series Layer 3 Stackable 10GbE Managed Switch Web UI Reference Guide To view the following window, click System > Loopback Test, as shown below: Figure 3-12 Loopback Settings 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 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. Click the Apply button to accept the changes made. 15