D-Link DGS-1100-08PV2 User Manual 1.00 WW - Page 35

4 Configuration D-Link Smart Managed Switch User Manual change to the forwarding state.  In the Edge mode, the port will directly change to the spanning-tree forwarding state when a link-up occurs without waiting for the forward-time delay. If the interface receives a BPDU later, its operation state changes to the non-port-fast state. By default, this option is Network. Table 4.23 Click Apply to make the configurations take effect. Click Refresh to renew the page. L2 Features > Loopback Detection The Loopback Detection function is used to detect loops created by a specific port while Spanning Tree Protocol (STP) is not enabled in the network, especially when the down links are hubs or unmanaged switches. The Switch will automatically shut down the port and send a log to the administrator. The looping port will be unlocked when the Loopback Detection Recover Time times out. Loopback Detection can also be enabled or disabled for a specified range of ports simultaneously. Figure 4.40 - L2 Features > Loopback Detection The fields that can be configured are described below: Item Description Loopback Detection Global Settings Loopback Detection Specify to enable or disable loopback detection function. The default is Disabled. Time Interval (1-32767) Set a Loop detection Interval between 1 and 32767 seconds. The default is 10 seconds. Recover Time (0 or 601000000) Time allowed (in seconds) for recovery when a Loopback is detected. The Loop Detection Recover Time can be set at 0 seconds, or 60 to 1000000 seconds. Entering 0 will disable the Loop Detection Recover Time. The default is 60 seconds Loopback Detection Port Settings From Port / To Port Select the range of ports to enable or disable Loopback Detection for. State Enable or disable Loopback Detection for the specified range of ports. Table 4.24 Click Apply to make the configurations take effect. Click Refresh to renew the Loopback Detection table. 32