D-Link DES-3228PA Installation Guide - Page 140

DES-3228PA Embedded Web System User Guide Enabling Storm Control Storm control limits the amount of Multicast and Broadcast frames accepted and forwarded by the device. When Layer 2 frames are forwarded, Broadcast, and Multicast frames are flooded to all ports on the relevant VLAN. This occupies bandwidth, and loads all nodes on all ports. A Broadcast Storm is a result of an excessive amount of broadcast messages simultaneously transmitted across a network by a single port. Forwarded message responses are heaped onto the network, straining network resources or causing the network to time out. Storm control is enabled for all Gigabit ports by defining the packet type and the rate the packets are transmitted. The system measures the incoming Broadcast and Multicast frame rates separately on each port, and discards the frames when the rate exceeds a user-defined rate. The Storm Control Page provides fields for configuring broadcast storm control. To enable storm control: 1. Click Advanced Setup > Security Suite > Traffic Control > Storm Control. The Storm Control Page opens. Figure 82: Storm Control Page The Storm Control Page contains the following fields: • Unit No. - Displays the stacking member's unit number. • Copy from Entry Number - Copies storm control information from the selected port. • to Entry Number(s) - Copies storm control information to the selected port. • Port - Indicates the port from which storm control is enabled. The possible field values are: - Enable - Enables storm control on the selected port. - Disable - Disables storm control on the selected port. Page 137