Configuration
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6.13 Storm Control
Broadcast storms may occur when a device on your network is malfunctioning, or if
application programs are not well designed or properly configured. If there is too much
broadcast traffic on your network, performance can be severely degraded or everything can
come to complete halt.
You can protect your network from broadcast storms by setting a threshold for broadcast
traffic for each port. Any broadcast packets exceeding the specified threshold will then be
dropped.
Figure 6-17
There are five type of traffic which can be rate limited, including ICMP, Learn Frame,
Broadcast, Multicast and Flooded Unicast Rate. The Rate field is set by a single drop-down
list. The same threshold is applied to every port on the switch. When the threshold is
exceeded, packets are dropped, irrespective of the flow-control settings.
ICMP Rate:
This can prevent user from continuing pinging the switch and waste the CPU
resource.
Learn Frame Rate:
By default, the switch performs wire-speed learning on all ports.
However, if some kind of unknown source MAC is classified as a “learn frame” and is
redirect to CPU. These packets will be filtered after enabled this command.
Broadcast Rate:
Broadcast Traffic.
Multicast Rate:
Unknown Multicast Traffic. Before IGMP Snooping Enabled, all the
Multicast are flooded and will be filtered by this command.
Flooded unicast Rate:
The source MAC has not yet been leant by the switch are
unknown Unicast. This command can help limit such traffic.
Summary of Contents for GV-POE1611-V2
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