HP BladeSystem bc2800 Embedded Web System User Guide for the HP BladeSystem PC - Page 70

Configuring Device Security 4. Click . The port security settings are defined, and the device is updated. 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 by which 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 Network Security > Traffic Control > Storm Control. The Storm Control page opens: Storm Control The Storm Control page contains the following fields: ❏ Copy From Entry Number - Copies the storm control parameters from the selected interface. ❏ To Entry Number(s) - Copies the storm control parameters to the defined interface. ❏ Port - Indicates the port on which storm control is enabled. ❏ Enable Broadcast Control - Indicates if forwarding Broadcast packet types on the interface is enabled. 4-44 www.hp.com Embedded Web System User Guide