Storm-Control - Cisco Catalyst 4500 Series Command Reference Manual

storm-control

storm-control
To enable broadcast storm control on a port and to specify what to do when a storm occurs on a port, use
the storm-control 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.
Syntax Description broadcast
level high-level lower-level
action
shutdown
trap
Defaults Broadcast storm control is disabled.
Command Modes
Interface configuration mode
Command History Release
12.1(19)EW
12.2(40)SG
Usage Guidelines
Enter the storm-control broadcast level command to enable 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 supports broadcast traffic storm control on all LAN ports.
The period is required when you enter the fractional suppression 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.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
2-1020
storm-control {broadcast level high level [lower level]} | action {shutdown | trap}}
no storm-control {broadcast level level [lower level]} | action {shutdown | trap}}
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Support introduced for Supervisor Engine 6-E and Catalyst 4900M.
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
Enables the broadcast storm control on the port.
Defines the rising and falling suppression 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.
Directs the switch to take action when a storm occurs on a port.
Disables the port during a storm.
Sends an SNMP trap when a storm occurs. This keyword is
available but not supported in 12.1(19)EW.
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