DGS-3100 Series Gigabit Stackable Managed Switch User Manual114Configuring Storm ControlStorm control limits the amount of Multicast, Broadcast and Unknown Unicast frames accepted and forwarded by thedevice. When Layer 2 frames are forwarded, Broadcast, Multicast and Unknown Unicast frames are flooded to all ports onthe 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 bya single port. Forwarded message responses are heaped onto the network, straining network resources or causing thenetwork to time out.1. Click Qos > Traffic Control. The Traffic Control Settings Page opens:Figure 4-3. Traffic Control Settings PageThe Traffic Control Settings Page contains the following fields:Field DescriptionUnit Defines the stacking member for which the storm control parameters are displayed.From Port Defines from which port storm control is configureed.To Port Defines to which port storm control is configured.Storm Control Type Specifies the Broadcast mode currently enabled on the device. The possible field values are:Broadcast StormBroadcast and Multicast StormBroadcast, Multicast and Unknown Unicast StormState Indicates which storm control is enabled on the port. The possible field values are:Enable — Enables storm control on the selected port.Disable — Disables storm control on the selected port. (This is the default value)Threshold (3500-1000000)Indicates the maximum rate (kilobits per second) at which ‘storm’ packets are forwarded. Therange is 3500 -1,000,000. The default value is 3,500.2. Define the Unit, From Port, To Port, Storm Control Type, State, and Threshold fields.3. Click . The storm control settings are configured, and the device is updated.
