D-Link DGS-3130 User Manual - Page 300

DGS-3130 Series Layer 3 Stackable Managed Switch Web UI Reference Guide Figure 9-66 ARP Spoofing Prevention Window The fields that can be configured are described below: Parameter Unit From Port - To Port Gateway IP Gateway MAC Description Select the Switch unit that will be used for this configuration here. Select the appropriate port range used for the configuration here. Enter the gateway IP address used here. Enter the gateway MAC address used here. Click the Apply button to accept the changes made. Click the Delete button to remove the specified entry. BPDU Attack Protection This window is used to display and configure the BPDU attack protection settings. In generally, there are two states in the BPDU attack protection function. One is normal state, and another is under attack state. The under attack state has three modes: drop, block, and shutdown. A BPDU protection enabled port will enter an under attack state when it receives one STP BPDU packet and it will take action based on the configuration. BPDU protection has a higher priority than the (Forward BPDU) FBPDU setting configured by configure STP command in the determination of BPDU handling. That is, when FBPDU is configured to forward STP BPDU but BPDU protection is enabled, then the port will not forward STP BPDU. BPDU protection also has a higher priority than the BPDU tunnel port setting in determination of BPDU handling. That is, when a port is configured as BPDU tunnel port for STP, it will forward STP BPDU. But if the port is BPDU protection enabled. Then the port will not forward STP BPDU. To view the following window, click Security > BPDU Attack Protection, as shown below: 290