Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
storm-control
storm-control
To enable broadcast storm control on a port a nd to spe cify what to do wh en a storm occurs on a port, use
the storm- cont ro l interface configuration command. To disable storm control for the broadcast traffic
and to disable a specified storm-control action, use the no form of this command.
storm-control {broadcast level high level [lower level]} | action {shutdown | trap}}
no storm-control {broadcast level level [lower level]} | action {shutdown | trap}}
Syntax Description
Defaults Broadcast storm control is disabled.
Command Modes Interface configur ation mode
Usage Guidelines Enter the storm-control broadcast level command to e nable traffic storm control on the interface,
configure the traffic storm control level, and apply the traffic storm control level to the broadcast traffic
on the interface.
The Catalyst 4500 series switch suppo rts broadcast traff ic storm control on all LAN port s.
The period is required when you enter the fractional suppres sion level.
The suppression level is entered as a percentage of the total bandwidth. A threshold value of 100 percent
indicates that no limit is placed on traffic. A value of 0.0 means that all specified traffic on that port is
blocked.
Enter the show interf aces count ers storm-c ontrol comm and to di splay t he dis card co unt.
Enter the show running-config command to display the enabled suppression mode and level setting.
To turn off suppression for the specified tra ffic type, you can do one of the following:
• Set the high-level value to 100 perc ent for the specified tra ffic type.
broadcast Enables the broadcast storm control on the port.
level high-level lower-level D efines the rising and falling sup pression levels:
• high-level—Rising suppression level as a percent of total
bandwidth, up to two decimal places; valid values are from 0
to 100 percent. Blocks the flooding of storm packets when the
value specified for level is reached.
• lower-level—(Optional) Falling suppression level as a
percent of total bandwidth, up to two decimal places; valid
values are from 0 to 100. This value must be less than the
rising suppression value.
action Directs the switch to take action when a storm occurs on a port.
shutdown Disables the port during a storm.
trap Sends an SNMP trap when a storm occurs. This keyword is
available but not supported in 12.1( 19)EW.