Configuring Device Security
Configuring Network Security
Page 53
Enabling Storm Control
Storm control limits the amount of unknown Unicast, 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. The
Storm Control Page
provides fields for configuring
broadcast storm control.
To enable storm control:
1.
Click
Network Security > Storm Control
. The
Storm Control Page
opens:
Figure 33: Storm Control Page
The
Storm Control Page
displays the Zoom View of the selected stacking member’s (defined in the
Unit No.
field)
ports.
2.
Select a port to configure. The port indicator changes to
Port is
selected
(white).
3.
Click
Modify
. The
Storm Control Configuration Page
opens: