Storm Control - NETGEAR GSM7212P User Manual

Storm Control

A broadcast storm is the result of an excessive number of broadcast messages
simultaneously transmitted across a network by a single port. Forwarded message
responses can overload network resources and/or cause the network to time out.
The switch measures the incoming broadcast/multicast/unknown unicast packet rate per port
and discards packets when the rate exceeds the defined value. Storm control is enabled per
interface, by defining the packet type and the rate at which the packets are transmitted.
The Storm Control folder contains links to the following features:
• Storm Control Global Configuration
• Storm Control Interface Configuration
Storm Control Global Configuration
To display the Storm Control Global Configuration page, click Security

Storm Control Storm Control Global Configuration.
The following four control radio buttons provide an easy way to enable or disable each type
of packets be rate-limited on every port in a global fashion. The effective storm control state
of each port can be viewed by going to the port configuration page.
Global Flow Control (IEEE 802.3x) Mode - Enable or disable this option by selecting the
•
corresponding line on the radio button. The factory default is disabled.
Broadcast Storm Control All - Enable or disable the Broadcast Storm Recovery mode on
•
all ports by clicking the corresponding radio button. When you specify Enable for
Broadcast Storm Recovery and the broadcast traffic on any Ethernet port exceeds the
configured threshold, the switch blocks (discards) the broadcast traffic. The factory
default is enabled.
Multicast Storm Control All - Enable or disable the Multicast Storm Recovery mode on all
•
ports by clicking the corresponding radio button. When you specify Enable for Multicast
Storm Recovery and the multicast traffic on any Ethernet port exceeds the configured
threshold, the switch blocks (discards) the multicast traffic. The factory default is
disabled.
Unknown Unicast Storm Control All - Enable or disable the Unicast Storm Recovery
•
mode on all ports by clicking the corresponding radio button. When you specify Enable
Web Management User Guide
on page 273
on page 274
273
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Traffic Control>