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Configuring Switch Information 257
Enabling Storm Control
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 per port by defining the packet type and the rate the packets are transmitted.
The system measures the incoming Broadcast, Unicast, and Multicast frame rate separately on
each port, and discard frames when the rate exceeds a user-defined rate.
The
Storm Control
page provides fields for enabling and configuring Storm Control. To open the
Storm Control
page, click
Switch
→
Ports
→
Storm Control
in the tree view.
Figure 7-16. Storm Control
The
Storm Control
page contains the following fields:
Port
— The port from which storm control is enabled.
Broadcast Control
— Enables or disables forwarding Broadcast packet types on the specific interface.
Broadcast Mode
— Specifies the Broadcast mode currently enabled on the device or stack. The
possible field values are:
Unknown Unicast, Multicast & Broadcast
— Counts Unicast, Multicast, and Broadcast traffic.
Multicast & Broadcast
— Counts Broadcast and Multicast traffic together.
Broadcast Only
— Counts only Broadcast traffic.
Broadcast Rate Threshold (70-285000)
— The maximum rate (kilobytes per second) at which
unknown packets are forwarded. The field range is 70-285000 kilobytes per second.