D-Link DES-3052 Product Manual - Page 195
Traffic Control, Port Security, Port Lock Entries, IP-MAC-Port Binding, SSL, SSH, 802.1X, Trusted Host
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DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch Section 10 Security Traffic Control Port Security Port Lock Entries IP-MAC-Port Binding SSL SSH 802.1X Trusted Host Access Authentication Control Traffic Segmentation DoS Attack Prevention Traffic Control On a computer network, packets such as Multicast packets and Broadcast packets continually flood the network as normal procedure. At times, this traffic may increase due to a malicious endstation on the network or a malfunctioning device, such as a faulty network card. Thus, switch throughput problems will arise and consequently affect the overall performance of the switch network. To help rectify this packet storm, the Switch will monitor and control the situation. The packet storm is monitored to determine if too many packets are flooding the network, based on the threshold level provided by the user. Once a packet storm has been detected, the Switch will drop packets coming into the Switch until the storm has subsided. This method can be utilized by selecting the Drop option of the Action field in the window below. The Switch will also scan and monitor packets coming into the Switch by monitoring the Switch's chip counter. This method is only viable for Unicast Broadcast and Multicast storms because the chip only has counters for these three types of packets. Once a storm has been detected (that is, once the packet threshold set below has been exceeded), the Switch will shutdown the port to all incoming traffic with the exception of STP BPDU packets, for a time period specified using the CountDown field. To view this window, click Security > Traffic Control. 181