Specifications

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Chapter 2 Cisco IOS Commands
storm-control
storm-control
Use the storm-control interface configuration command to enable broadcast, multicast, or unicast storm
control on a port and to specify the action taken when a storm occurs on a port. Use the no form of this
command to disable storm control for broadcast, multicast, or unicast traffic and disable the specified
storm-control action.
storm-control {{{broadcast | multicast | unicast} level level [lower level]} | action {shutdown |
trap}}
no storm-control {{broadcast | multicast | unicast} level} | action}
Syntax Description
Defaults Broadcast, multicast, and unicast storm control are disabled.
The default action is to filter traffic and to not send an SNMP trap.
Command Modes Interface configuration
Command History
{broadcast | multicast | unicast} Determines the type of packet-storm suppression.
• broadcast—Enable broadcast storm control on the port.
• multicast—Enable multicast storm control on the port.
• unicast—Enable unicast storm control on the port.
level level [lower level] Defines the rising and falling suppression levels.
• level—Rising suppression level as a percent of total
bandwidth, up to two decimal places; valid values are from 0
to 100 percent. Block 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 supression value.
action Action taken when a storm occurs on a port. The default action is
to filter traffic and not send an Simple Network Management
Protocol (SNMP) trap.
shutdown Disables the port during a storm.
trap Sends an SNMP trap when a storm occurs.
Release Modification
12.1(6)EA2 This command was first introduced. It replaced port storm-control
command.