Cisco Catalyst 2960 Series, Configuration Manual

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Purpose Command or Action
blocks traffic when the rising threshold is reached. The range is 0.0 to
10000000000.0.
• (Optional) For pps-low , specifies the falling threshold level in packets per
second (up to one decimal place). It can be less than or equal to the rising
threshold level. The port forwards traffic when traffic drops below this level.
The range is
0.0 to
10000000000.0.
For BPS and PPS settings, you can use metric suffixes such as k, m, and g for
large number thresholds.
Specifies the action to be taken when a storm is detected. The default is to filter
out the traffic and not to send traps. storm-control action { shutdown |
trap }
Step 5
Example:
Switch(config-if)# storm-control
action trap
• Select the shutdown keyword to error-disable the port during a storm.
• Select the
trap
keyword to generate an SNMP trap when a storm is detected.
Returns to privileged EXEC mode. end
Example:
Switch(config-if)# end
Step 6
Verifies the storm control suppression levels set on the interface for the specified
traffic type. If you do not enter a traffic type, broadcast storm control settings are
displayed. show storm-control [ interface-id ]
[ broadcast | multicast | unicast ]
Example:
Switch# show storm-control
gigabitethernet1/0/1 unicast
Step 7
(Optional) Saves your entries in the configuration file. copy running-config startup-config
Example:
Switch# copy running-config
startup-config
Step 8
Configuring Small-Frame Arrival Rate
Incoming VLAN-tagged packets smaller than 67 bytes are considered small frames. They are forwarded by
the switch, but they do not cause the switch storm-control counters to increment.
You globally enable the small-frame arrival feature on the switch and then configure the small-frame threshold
for packets on each interface. Packets smaller than the minimum size and arriving at a specified rate (the
threshold) are dropped since the port is error disabled.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1470
How to Configure Storm Control