Enabling Storm Control - NETGEAR FS728TS User Manual

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 ports by defining the packet type and the rate 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. By default, storm
control is enabled on all ports - broadcast only - with threshold of 200 kbps. Storm Control is enabled by default.
The Storm Control Page provides fields for configuring broadcast storm control.
To enable storm control:
1. Click Security > Traffic Control > Storm Control. The Storm Control Page opens.
The Storm Control Page contains the following fields:
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Unit — Indicates the stacking number.
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Interface — Displays the port number for which the storm control information is displayed.
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Enable Broadcast Control — Indicates if forwarding Broadcast packet types is enabled on the interface for which the storm control
information is displayed. The possible field values are:
Enable — Enables storm control on all broadcast only ports with threshold of 200 kbps. Enabled is the default.
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Disable — Disables storm control on the interface.
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•
Broadcast Mode — Specifies the Broadcast mode currently enabled on the device. The possible field values are:
Unknown Unicast, Multicast & Broadcast — Counts Unicast, Multicast, and Broadcast traffic.
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Figure 5 - 12: Storm Control Page
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