storm-control level

To set the suppression level for traffic storm control, use the storm-control level command. To turn off the suppression mode or revert to the default, use the no form of this command.

storm-control {broadcast | multicast | unicast} level percentage[.fraction]

no storm-control {broadcast | multicast | unicast} level

Syntax Description


Specifies the broadcast traffic.


Specifies the multicast traffic.


Specifies the unicast traffic.

level percentage

Specifies the percentage of the suppression level. The range is from 0 to 100 percent.


(Optional) Fraction of the suppression level. The range is from 0 to 99.

Command Default

All packets are passed.

Command Modes

Interface configuration mode

Command History



This command was introduced.

Usage Guidelines

Enter the storm-control level command to enable traffic storm control on the interface, configure the traffic storm-control level, and apply the traffic storm-control level to all traffic storm-control modes that are enabled on the interface.

The period (.) is required when you enter the fractional-suppression level.

The suppression level is a percentage of the total bandwidth. A threshold value of 100 percent means that no limit is placed on traffic. A threshold value of 0 or 0.0 (fractional) percent means that all specified traffic is blocked on a port.

Use the show interfaces counters storm-control command to display the discard count.

Use one of the following methods to turn off suppression for the specified traffic type:

•Set the level to 100 percent for the specified traffic type.

•Use the no form of this command.


This example shows how to enable suppression of broadcast traffic and set the suppression threshold level:

switch(config-if)# storm-control broadcast level 30 

This example shows how to disable the suppression mode for multicast traffic:

switch(config-if)# no storm-control multicast level 

Related Commands


show interface

Displays the storm-control suppression counters for an interface.

show running-config

Displays the configuration of the interface.