User`s guide

AT-S45 User’s Guide
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Storm Control Overview
Most frames on an Ethernet network are unicast frames. A node sending
a unicast frame intends the frame for a particular node on the network.
For example, when a node needs to send a file to a network server for
storage, the node sends the file in unicast Ethernet frames containing
the destination address of the server where the file is to be stored.
Broadcast frames are different. When a node sends out a broadcast
frame, the frame is directed to all nodes on the network or all nodes
within a particular virtual LAN. Broadcast packets can perform a variety
of functions in an Ethernet network. For example, some network
operating systems use broadcast frames to announce the presence of
devices on the network.
The problem with broadcast frames is that too many of them traversing
the network can impact network performance. Should the performance
of your network has been diminished by heavy broadcast traffic, you can
use the AT-S45 management software to limit the number of broadcast
frames passing through the switch and so limit the number of broadcast
frames on your network.
In order to use this feature, you must enable the broadcast storm control
and set the threshold level.
Note
The AT-S45 default setting is no broadcast frame control on the
switch.