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Configuring Switch Information 265
Enabling Storm Control
A broadcast storm is the result of an excessive amount of broadcast messages simultaneously
transmitted across a network by a single port. Forwarded message responses can overload network
resources and/or cause the network to time out.
Your switch measures the incoming broadcast/multicast packet rate per port and discards packets
when the rate exceeds the defined value. Storm control is enabled per device, by defining the
packet type and the rate the packets are transmitted. Ports groups provide storm protection for an
entire port group.
Use the
Storm Control
page to enable and configure storm control. To open the
Storm Control
page, click
Switch
→
Ports
→
Storm Control
in the tree view.
Figure 7-15. Storm Control Page
Count Multicast with Broadcast
—
Enable
counts Broadcast and Multicast traffic;
Disable
counts
only Broadcast traffic.
Port
— The port from which storm control is enabled.
Broadcast Control
— Enables or disables forwarding unknown packet types on the device.
Broadcast Rate Threshold
— The maximum rate (kilobytes per second) at which unknown packets
are forwarded. The range is 0-148,800. The default value is 12000. All values are rounded to the
nearest 64Kbps. If the field value is under 64Kbps, the value is rounded up to 64Kbps.