Enabling Storm Control - Cisco 4500M Software Manual

Chapter 38 Configuring Port-Based Traffic Control

Enabling Storm Control

To enable storm control, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# interface interface-id
Step 3
Switch(config-if)# storm-control
broadcast level [ high level ] [ lower
level ]
Step 4
Switch(config-if)# storm-control
action {shutdown | trap}
Step 5
Switch(config-if)# exit
Step 6
Switch(config)# end
Step 7
Switch# show storm-control [interface]
broadcast
Step 8
Switch# copy running-config
startup-config
The following example shows how to enable storm control on interface.
Switch# conf t
Enter configuration commands, one per line.
Switch(config)# int fa3/1
Switch(config-if)# storm-control broadcast level 50
Switch(config-if)# end
Switch# write memory
Building configuration...
00:11:06: %SYS-5-CONFIG_I: Configured from console by consoleCompressed configuration from
5394 bytes to 1623 bytes[OK]
Switch#sh
Switch#sh
Interface
---------
Fa3/1
Switch#
OL-6696-01
Purpose
Enters global configuration mode.
Enters interface configuration mode and enter the port to configure.
Configures broadcast storm control.
Specifies the upper threshold levels for broadcast traffic. The storm
control action occurs when traffic utilization reaches this level.
(Optional) Specifies the falling threshold level. The normal
transmission restarts (if the action is filtering) when traffic drops
below this level for interfaces that support software-based
suppression.
Note
Specifies the action to be taken when a storm is detected.
The default is to filter out the broadcast traffic and not to send out
traps.
The shutdown keyword sets the port to error-disable state during a
storm. If the recover interval is not set, the port remains in shutdown
state.
Note
Returns to configuration mode.
Returns to privileged EXEC mode.
Displays the number of packets suppressed.
(Optional) Saves your entries in the configuration file.
stor
storm-control
Filter State Upper
------------- -------
Forwarding 50.00%
For ports that perform hardware-based suppression, the
lower threshold is ignored.
The trap keyword generates an SNMP trap when a storm is
detected. This keyword is available but not supported in the
12.1(19)EW release.
End with CNTL/Z.
Lower Current
------- -------
50.00% 0.00%
Software Configuration Guide—Release 12.2(25)EW
Enabling Storm Control
38-3