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Setting Broadcast Storm Thresholds
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.
Command Usage
• Broadcast control does not effect IP multicast traffic.
• The resolution is 1 packet per second (pps); i.e., any setting between 500-262143
is acceptable.
Command Attributes
• Port
6
– Port number.
• Trunk
7
– Trunk number
• Type – Indicates the port type. (1000BASE-T, SFP, or 10G)
•
Protect Status
– Shows whether or not broadcast storm control has been enabled.
(Default: Enabled)
• Threshold – Threshold as percentage of port bandwidth.
(Options: 500-262143 packets per second; Default: 500 pps)
• Trunk
6
– Shows if port is a trunk member.
6. Port Broadcast Control
7. Trunk Broadcast Control
8-17
-------------------------------------------------------------------------
Eth 1/2
-------------------------------------------------------------------------
Partner Admin System ID: 32768, 00-00-00-00-00-00
Partner Oper System ID: 32768, 00-01-F4-78-AE-C0
Partner Admin Port Number: 2
Partner Oper Port Number: 2
Port Admin Priority: 32768
Port Oper Priority: 32768
Admin Key: 0
Oper Key: 3
Admin State: defaulted, distributing, collecting,
synchronization, long timeout,
Oper State: distributing, collecting, synchronization,
a
ggregation,
l
ong timeout,
L
ACP
-
a
ctivity
Setting Broadcast Storm Thresholds
CLI
– The following example displays the LACP configuration settings and
operational state for the remote side of port channel 1.
Console#show lacp 1 neighbors
Port channel 1 neighbors
8
2
8
-
7
.
.