Cisco NM-8B-U - HW ROUTERS L-M User Manual page 238

storm-control
storm-control
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 storm-control command in interface configuration mode. To disable
storm control for broadcast, multicast, or unicast traffic and disable the specified storm-control action,
use the no form of this command.
Syntax Description
{broadcast | multicast | unicast} Determines the type of packet-storm suppression.
level level [lower-level]
action
shutdown
Defaults
Broadcast, multicast, and unicast storm control are disabled.
The default action is to filter traffic.
Command Modes
Interface configuration
Command History Release
12.1(6)EA2
12.2(15)ZJ
Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ
238
16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series
storm-control {{{broadcast | multicast | unicast} level level [lower-level]} | action shutdown}
no storm-control {{broadcast | multicast | unicast} level} | action}
Modification
This command was introduced. It replaced the port storm-control
command.
This command was implemented on the Cisco 2600 series,
Cisco 3600 series, and Cisco 3700 series routers.
• broadcast—Enable broadcast storm control on the port.
• multicast—Enable multicast storm control on the port.
• unicast—Enable unicast storm control on the port.
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 suppression value.
Action taken when a storm occurs on a port. The default action is
to filter traffic.
Disables the port during a storm.