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4.7.7 Storm control
A BroadcastStorm 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.
The system measures the incoming Broadcast 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. The screen in Figure
4-34 appears.
The Page contains the following fields:
• Port
• Broadcast Control
• Mode
Frequency (1-1000000) field can be defined only if multiple hosts are
disabled.
The default is 10 seconds.
Where indicates the host status.
Figure 4-34 Storm Control screen
Displays the port number for which storm control is enabled
This indicates whether broadcast packet types are forwarded on the
specific interface.
By which specifies the Broadcast mode currently enabled on the
device. The possible field values are:
• Unknown Unicast, Multicast & Broadcast, counts Unicast,
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