D-Link DGS-1250 User Manual - Page 106

DGS-1250 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide The Loopback Detection function can be implemented on a range of ports at a time. The user may enable or disable this function using the drop-down menu. To view the following window, click L2 Features > Loopback Detection, as shown below: Figure 5-40 Loopback Detection Window The fields that can be configured in Loopback Detection Global Settings are described below: Parameter Loopback Detection State Mode Enabled VLAN ID List Interval Trap State Description Select to enable or disable loopback detection. The default is Disabled. Select the loopback detection mode. Options to choose from are Port-based and VLAN-based. Enter the VLAN ID for loop detection. This only takes effect when VLAN-based is selected in the Mode drop-down list. Enter the interval in seconds that the device will use to transmit Configuration Test Protocol (CTP) packets to detect a loopback event. The valid range is from 1 to 32767 seconds. The default setting is 10 seconds. Select to enable or disable the loopback detection trap state. Click the Apply button to accept the changes made. The fields that can be configured in Loopback Detection Port Settings are described below: Parameter From Port - To Port State Description Select the appropriate port range used for the configuration here. Select this option to enable or disable the state of the port. Click the Apply button to accept the changes made. Link Aggregation Understanding Port Trunk Groups Port trunk groups are used to combine a number of ports together to make a single high-bandwidth data pipeline. The Switch supports up to 8 port trunk groups with up to 8 ports in each group. 97