D-Link DGS-1250 User Manual - Page 225

DGS-1250 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide Parameter Restart Description Enter the restart time value used here. The range is from 1 to 65535 seconds. By default, this value is 60 seconds. Click the Apply button to accept the changes made. Network Access Authentication Sessions Information This window is used to view and clear the network access authentication session information. To view the following window, click Security > Network Access Authentication > Network Access Authentication Sessions Information, as shown below: Figure 9-57 Network Access Authentication Sessions Information Window The fields that can be configured are described below: Parameter Port MAC Address Protocol Description Select the port for the query here. Enter the MAC address used here. Specifies that the protocol is DOT1X (IEEE 802.1X). Click the Clear by Port button to the clear the information based on the port selected. Click the Clear by MAC button to the clear the information based on the MAC address entered. Click the Clear by Protocol button to the clear the information based on the protocol selected. Click the Clear All button to clear all the information in this table. Click the Find button to locate a specific entry based on the information entered. Click the Show All button to locate and display all the entries. Safeguard Engine Periodically, malicious hosts on the network will attack the Switch by utilizing packet flooding (ARP Storm) or other methods. These attacks may increase the Switch's CPU load beyond its capability. To alleviate this problem, the Safeguard Engine function was added to the Switch's software. The Safeguard Engine can help the overall operability of the Switch by minimizing the workload of the Switch while the attack is ongoing, thus making it capable to forward essential packets over its network in a limited bandwidth. 216